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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549





Form 10-K



ANNUAL REPORT

PURSUANT TO SECTIONS 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934



|þ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ------------------------------------------------------------------------------------

For the fiscal year ended December 31, 2010

or



| ̈ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ----------------------------------------------------------------------------------------

For the transition period from              to

Commission file number 0-29801





INTERMUNE, INC.

(Exact name of registrant as specified in its charter)



|                                                               |  |                                  
|-------------------------------------------------------------- |  | ---------------------------------
|Delaware                                                       |  | 94-3296648                       
|(State or other jurisdiction of
incorporation or organization) |  | (IRS Employer identification No.)

3280 Bayshore Boulevard

Brisbane, CA 94005

(Address of principal executive offices, including Zip Code)

(415) 466-2200

(Registrants telephone number, including area code)





Securities
registered pursuant to Section 12(b) of the Act:



|                               |  |                                     
|------------------------------ |  | ------------------------------------
|Title of Each Class            |  | Name of Exchange on which Registered
|Common Stock, $0.001 par value |  | The NASDAQ Stock Market LLC.        

Securities registered pursuant to Section 12(g) of the Act: None





Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities
Act.    Yes  þ    No   ̈

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the
Securities Exchange Act of 1934.    Yes   ̈    No  þ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the
Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past
90 days.    Yes  þ    No   ̈

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every
Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such
files).    Yes   ̈    No   ̈



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Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of
Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrants knowledge, in definitive proxy or information statements incorporated by reference in Part III of
this Form 10-K or any amendment to this Form 10-K.   ̈

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller
reporting company. See the definitions of large accelerated filer, accelerated filer and smaller reporting company in Rule 12b-2 of the Exchange Act. (Check one):



|                        |  |                                                  |  |                           |  |  
|----------------------- |  | ------------------------------------------------ |  | ------------------------- |  | -
|Large accelerated filer |  |  ̈                                                |  | Accelerated filer         |  | þ
|                        |  |                                                  | 
|Non-accelerated filer   |  |  ̈  (Do not check if a smaller reporting company) |  | Smaller reporting company |  |  ̈

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange
Act).    Yes   ̈    No  þ

As of June 30, 2010, the aggregate market value (based upon the closing sales price of such stock as reported on The NASDAQ Global
Select Market on such date) of the voting and non-voting stock held by non-affiliates of the registrant was $352,272,330, which excludes an aggregate of 18,350,654 shares of the registrants common stock held by officers and directors and
by each person known by the registrant to own 10% or more of the registrants outstanding common stock as of June 30, 2010. Exclusion of shares held by any person should not be construed to indicate that such person possesses the power,
direct or indirect, to direct or cause the direction of the management or policies of the registrant, or that such person is controlled by or under common control with the registrant. As of March 1, 2011, the number of outstanding shares of the
registrants common stock was 58,792,210 shares.





DOCUMENTS
INCORPORATED BY REFERENCE

Portions of the registrants definitive Proxy Statement for the 2011 Annual Meeting of
Stockholders to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Form 10-K are incorporated by reference in Part III,
Items 10-14 of this Annual Report on Form 10-K.









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INTERMUNE, INC.

ANNUAL REPORT ON FORM 10-K

FOR THE FISCAL YEAR ENDED DECEMBER 31, 2010

TABLE OF
CONTENTS



|           |  |                                                                                                              |  |  |     | 
|---------- |  | ------------------------------------------------------------------------------------------------------------ |  |  | --- | 
|PART I     |  |                                                                                                              |  |  | 4   | 
|ITEM 1.    |  | BUSINESS                                                                                                     |  |  | 4   | 
|ITEM 1A.   |  | RISK FACTORS                                                                                                 |  |  | 22  | 
|ITEM 1B.   |  | UNRESOLVED STAFF COMMENTS                                                                                    |  |  | 43  | 
|ITEM 2.    |  | PROPERTIES                                                                                                   |  |  | 44  | 
|ITEM 3.    |  | LEGAL PROCEEDINGS                                                                                            |  |  | 44  | 
|ITEM 4.    |  | (REMOVED AND RESERVED)                                                                                       |  |  | 47  | 
|           |  |                                                                                                             
|PART II    |  |                                                                                                              |  |  | 47  | 
|ITEM 5.    |  | MARKET FOR REGISTRANTS COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES |  |  | 47  | 
|ITEM 6.    |  | SELECTED FINANCIAL DATA                                                                                      |  |  | 48  | 
|ITEM 7.    |  | MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS                        |  |  | 51  | 
|ITEM 7A.   |  | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK                                                   |  |  | 62  | 
|ITEM 8.    |  | FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA                                                                  |  |  | 64  | 
|ITEM 9.    |  | CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL
DISCLOSURES                        |  |  | 99  | 
|ITEM 9A.   |  | CONTROLS AND PROCEDURES                                                                                      |  |  | 99  | 
|ITEM 9B.   |  | OTHER INFORMATION                                                                                            |  |  | 101 | 
|           |  |                                                                                                             
|PART III   |  |                                                                                                              |  |  | 101 | 
|ITEM 10.   |  | DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE                                                       |  |  | 101 | 
|ITEM 11.   |  | EXECUTIVE COMPENSATION                                                                                       |  |  | 101 | 
|ITEM 12.   |  | SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER
MATTERS               |  |  | 101 | 
|ITEM 13.   |  | CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE                                    |  |  | 101 | 
|ITEM 14.   |  | PRINCIPAL ACCOUNTING FEES AND SERVICES                                                                       |  |  | 102 | 
|           |  |                                                                                                             
|PART IV    |  |                                                                                                              |  |  | 102 | 
|ITEM 15.   |  | EXHIBITS AND FINANCIAL STATEMENT SCHEDULES                                                                   |  |  | 102 | 
|           |  |                                                                                                             
|SIGNATURES |  |                                                                                                              |  |  | 109 | 



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PART I

ITEM 1.BUSINESS

Forward Looking Statements

This Annual Report on Form 10-K (the
Report) contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements involve substantial
risks and uncertainty. You can identify these statements by forward-looking words such as may, will, expect, intend, anticipate, believe, estimate, plan,
could, should and continue or similar words. These forward-looking statements may also use different phrases.

We have based these forward-looking statements on our current expectations and projections about future events. These forward-looking statements, which are subject to risks, uncertainties and assumptions
about us, may include, among other things, statements which address our strategy and operating performance and events or developments that we expect or anticipate will occur in the future, including, but not limited to, statements about:



| |  |  | product and product candidate development;
| | - |  | ------------------------------------------



| |  |  | the market or markets for our products or product candidates;
| | - |  | -------------------------------------------------------------



| |  |  | the ability of our products to treat patients in our markets;
| | - |  | -------------------------------------------------------------



| |  |  | timing and expectations of our clinical trials and when our products or product candidates may be marketed;
| | - |  | -----------------------------------------------------------------------------------------------------------



| |  |  | opportunities to establish development or commercial alliances;
| | - |  | ---------------------------------------------------------------



| |  |  | commercial launch preparations, including building the infrastructure required for commercial launch in the European Union;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------



| |  |  | the scope and enforceability of our intellectual property rights, including the anticipated durations of patent protection and marketing exclusivity in
the European Union, United States and other jurisdictions, and including claims that we or our collaborators may infringe third party intellectual property rights or otherwise be required to pay license fees and or royalties under such third party
rights;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | governmental regulation and approval;
| | - |  | -------------------------------------



| |  |  | requirement of additional funding to complete research and development and commercialize products;
| | - |  | --------------------------------------------------------------------------------------------------



| |  |  | liquidity and sufficiency of our cash resources;
| | - |  | ------------------------------------------------



| |  |  | future revenue, including those from product sales and collaborations, adequacy of revenue reserve levels, future expenses, future financial
performance and trends;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our future research and development expenses and other expenses; and
| | - |  | --------------------------------------------------------------------



| |  |  | our operational and legal risks.
| | - |  | --------------------------------

You should also consider carefully the statements under Item 1A. Risk Factors below, which address additional factors that could cause our results to differ from those set forth in the
forward-looking statements. Any forward-looking statements are qualified in their entirety by reference to the factors discussed in this Report, including those discussed in this Report under Item 1A. Risk Factors below. Because the
factors referred to above, as well as the factors discussed in this Report under Item 1A. Risk Factors below, could cause actual results or outcomes to differ materially from those expressed in any forward-looking statements made by
us or on our behalf, you should not place undue reliance on any forward-looking statement. Further, any forward-looking statement speaks only as of the date on which it is made, and we undertake no obligation to update any forward-looking statement
to reflect events or circumstances after the date on which the statement is made or to reflect the occurrence of unanticipated events. New factors emerge from time to time, and it is not possible for us to predict which factors will arise. In
addition, we cannot assess the impact of each



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factor on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. When
used in this Report, unless otherwise indicated, InterMune, we, our, us or the Company refers to InterMune, Inc.

Overview

We are a biopharmaceutical company focused on
developing and commercializing innovative therapies in pulmonology and hepatology. Pulmonology is the field of medicine concerned with the diagnosis and treatment of lung conditions. Hepatology is the field of medicine concerned with the diagnosis
and treatment of disorders of the liver. We currently have rights to one approved and marketed product, Actimmune, which is approved in the United States and numerous other countries for the treatment of chronic granulomatous disease
(CGD) and severe, malignant osteopetrosis. Additionally, we have an advanced-stage product candidate in pulmonology, pirfenidone, that we are preparing for commercial launch in the European Union under the trade name Esbriet®, currently expected during the second half of 2011. We also have a hepatology portfolio of small molecule compounds
that are currently in pre-clinical research.

Pirfenidone, a treatment for idiopathic pulmonary fibrosis (IPF), a
progressive and fatal lung disease, has completed the global Phase 3 CAPACITY clinical development program. In 2004, both the U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA) granted orphan drug
status to pirfenidone for the treatment of IPF. In March 2010, we filed a Marketing Authorisation Application (MAA) with the EMA seeking approval of pirfenidone for the treatment of patients with mild to moderate IPF. In December 2010,
the Committee for Medicinal Products for Human Use (CHMP) of the EMA adopted a positive opinion recommending the granting of our MAA for pirfenidone within the European Union. We received notification of ratification of the CHMP opinion
by the European Commission in March 2011, which authorizes the marketing of Esbriet (pirfenidone) in all 27 member states of the European Union. We currently expect to independently launch Esbriet for commercial use within the European Union
beginning in Germany in September of 2011.

In January 2010, the FDA accepted our New Drug Application (NDA) for
pirfenidone for the treatment of patients with mild to moderate IPF and granted priority review status for our NDA. In March 2010, the Pulmonary-Allergy Drugs Advisory Committee (PADAC) of the FDA voted 9-3 in favor of recommending
approval of the Companys NDA for pirfenidone to reduce decline in lung function in patients with IPF. However, in May 2010, we received a Complete Response Letter from the FDA requesting the conduct of an additional clinical trial to provide
additional evidence of the efficacy of pirfenidone to reduce decline in lung function in patients with IPF . After reviewing various regulatory and clinical development options to gain approval of pirfenidone for commercial use within the United
States, in January 2011 we reported that, as recommended by the FDA in its Complete Response Letter, the Company currently plans to conduct a new Phase 3 clinical study that would demonstrate a clinically meaningful effect on forced vital capacity
in patients with mild to moderate IPF, with the goal of having the first patient enrolled in the study during the first half of 2011. We currently have a meeting scheduled with the FDA in March 2011 to discuss our plan for such a new Phase 3
clinical study.

Our second area of therapeutic focus has been in the area of hepatology, primarily to expand treatment
options for patients suffering from chronic hepatitis C virus (HCV) infection. From October 2006 to October 2010 , we had been a research and development collaboration agreement with Hoffmann-LaRoche Inc. and F.Hoffmann-La Roche Ltd.
(collectively, Roche) for products from our HCV protease inhibitor program, including our compound danoprevir (formerly known as ITMN-191), as a treatment for HCV infection. In October 2010, we sold our worldwide development and
commercialization rights to danoprevir to Roche for $175.0 million in cash. In connection with this transaction, our October 2006 collaboration agreement with Roche was terminated. Our remaining hepatology portfolio includes drug discovery and
preclinical development of second generation HCV protease inhibitors and NS5A inhibitors. In December 2010, we entered into a new collaboration agreement with Roche pursuant to which we will continue to conduct research in small molecule protease
inhibitors for the treatment of HCV infection.

To support our anticipated marketing efforts for Esbriet in Europe, we are
currently working to expand our commercial infrastructure within the European Union, including an increase to our employee headcount in that region. On December 17, 2010, we announced several additions to our senior leadership team in support
of our commercialization of Esbriet as well as the establishment of our European headquarters in Reinach, Switzerland. In December 2010, we transferred all of our non-U.S. rights to research, develop and commercialize pirfenidone for IPF to our
wholly-owned Swiss subsidiary, InterMune International AG.

We were incorporated in California in 1998 and reincorporated in
Delaware in 2000 in connection with our initial public offering. We have established wholly-owned subsidiaries in various countries, primarily to support our expected commercialization of Esbriet



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in Europe including subsidiaries in the United Kingdom, Germany, France, Switzerland, Spain, Italy and Canada. Our worldwide corporate headquarters are in Brisbane, California and our European
headquarters are in Reinach, Switzerland.

Our total revenue and income (loss) from continuing operations for each of the
years ended, and our total assets as of December 31, 2010, 2009 and 2008 are summarized in the following table:



|                                         |  |                |         |  |      |   |          |      |  |   |          |  
|---------------------------------------- |  | -------------- | ------- |  | ---- | - | -------- | ---- |  | - | -------- | -
|                                         |  | 2010           |         |  | 2009 |   |          | 2008 | 
|                                         |  | (In thousands) |        
|Total revenue (1)                        |  | $              | 259,291 |  |      | $ | 48,700   |      |  | $ | 48,152   |  
|Income (loss) from continuing operations |  |                | 122,374 |  |      |   | (116,020 | )    |  |   | (106,599 | )
|Total assets                             |  |                | 305,147 |  |      |   | 114,727  |      |  |   | 171,810  |  



|(1) | Total revenue in 2010 includes $175.0 million from the sale of our rights to danoprevir to Roche and the acceleration of $57.3 million of previously deferred revenue
related to the termination of our 2006 collaboration agreement with Roche.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Approved Product

Actimmune®

Actimmune is
currently our only product that is approved for commercial use. Actimmune is approved in the United States for the treatment of chronic granulomatous disease and severe, malignant osteopetrosis. Actimmune is also approved for commercial use in both
indications in numerous other countries. However, a significant portion of the sales of Actimmune in the United States have been for off-label indications, primarily for the treatment of IPF. In 1998 we obtained a license from Genentech, Inc.
(Genentech) to exclusively develop, use and sell Actimmune in particular fields in the United States, Canada and Japan. In 2001, we entered into a collaboration agreement with Boehringer Ingelheim (BI) to develop and
commercialize interferon gamma-1b, the active ingredient in Actimmune, in Europe and the rest of the world under the trade name Imukin®. For the years ended December 31, 2010, 2009 and 2008, sales of Actimmune accounted for all of our product revenue.

Chronic granulomatous disease: CGD is a life-threatening congenital disorder that causes patients, primarily children, to be
vulnerable to severe, recurrent bacterial and fungal infections. This results in frequent and prolonged hospitalizations and commonly results in death. In 1990, Actimmune was approved by the FDA for reducing the frequency and severity of serious
infections associated with CGD, and is the only FDA-approved drug for this disease.

Severe, malignant
osteopetrosis: Severe, malignant osteopetrosis is a life-threatening, congenital disorder that primarily affects children. This disease results in increased susceptibility to infection and an overgrowth of bony structures that may lead to
blindness and/or deafness. In 2000, Actimmune was approved by the FDA for delaying time to disease progression in patients with severe, malignant osteopetrosis, and is the only FDA-approved drug for this disease.

Primary Therapeutic Focus

Notwithstanding the revenue of Actimmune for the two indications described above, our business is primarily focused on the development and
commercialization of therapies within the specialized areas of pulmonology and hepatology.

Pulmonology

Pulmonology is the specialized branch of medicine that is focused on diseases of the lungs and respiratory tract. Our
current focus in this area of medicine is on the treatment of IPF.

Idiopathic pulmonary fibrosis: IPF is a disease
characterized by progressive scarring, or fibrosis, of the lungs, which leads to their deterioration and destruction. The cause of IPF is unknown. The prognosis is poor for patients with IPF, which occurs primarily in persons 40 to 70 years old
with a median survival time from diagnosis of two to five years. It is estimated that approximately 135,000 people suffer from IPF in the European Union with approximately 100,000 cases in the United States. Approximately two-thirds of the affected
patients are believed to have mild to moderate disease severity. In the United States, it is believed that approximately 30,000 new IPF cases develop each year with a slightly higher level of incidence in the European Union. Pirfenidone is the only
commercially approved drug for the treatment of mild to moderate IPF and is now approved in (i) the European Union and will be sold by us under the trade name



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Esbriet, (ii) Japan and is sold by Shionogi under the tradename
Pirespa®, and (iii) India and is sold by Cipla Ltd. under the trade name Pirfenex. Currently, there is no
FDA approved therapy for the treatment of IPF in the United States.

Hepatology

Hepatology is the specialized branch of medicine that is focused on disorders and disease of the liver. Our current focus in this area is
on the treatment of patients having HCV infection.

Chronic hepatitis C viral infection: Hepatitis C is an infectious
disease affecting the liver and is caused by the hepatitis C virus. Chronic infection can lead to scarring of the liver, liver failure, liver cancer and other serious conditions. It is believed that as many as 200 million people are infected
with hepatitis C worldwide. According to the Centers for Disease Control and Prevention (CDC) an estimated 3.9 million Americans have been infected with HCV, of whom 2.7 million are chronically infected. The primary mode of
transmission of HCV is through contaminated blood. Despite the currently available therapies, interferon alphas and ribavirin, there is considerable need for the development of novel therapeutic approaches since approximately 50% of patients are not
cured with these currently available therapies. Patients who are not cured may be at risk of developing cirrhosis, liver failure and hepatocellular carcinoma.

Development of Pirfenidone (Esbriet ®)

Pirfenidone is an orally active, small molecule compound under development for the treatment of IPF. In March 2011, pirfenidone was
granted marketing authorization under the trade name Esbriet for commercial use in the European Union for the treatment of mild to moderate IPF following the adoption of a positive opinion by the CHMP of the EMA. We are evaluating our clinical
development options to gain approval of pirfenidone for commercial use within the United States and currently have plans to begin a new Phase 3 clinical study in the first half of 2011. Pirfenidone may also prove effective in multiple fibrotic
indications. In vitroexperiments show that pirfenidone inhibits collagen synthesis, down-regulates profibrotic and proinflammatory cytokines and decreases fibroblast proliferation and stimulation in response to cytokines.

In 2004, the EMA granted pirfenidone orphan drug designation in the European Union, and the FDA granted pirfenidone orphan drug status in
the United States, for the treatment of IPF. EMA orphan drug designation provides for ten years of market exclusivity from the date of approval within the European Union and will expire in late February 2021. In the United States, under the Orphan
Drug Act, the FDA may grant orphan drug designation to drugs intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the United States. This designation provides seven
years of market exclusivity in the United States upon the FDAs first approval of the product for the orphan designation provided that the sponsor complies with certain FDA specified conditions. If pirfenidone is approved for the treatment of
patients with IPF in the United States, we currently anticipate that it will have seven years of market exclusivity by virtue of its orphan drug designation.

To develop and commercialize pirfenidone for all fibrotic diseases, we acquired from Marnac, Inc. (Marnac) and KDL GmbH (KDL) substantially all of their worldwide rights to the
compound. Independently, Shionogi and Co. Ltd. (Shionogi), obtained the rights from Marnac to develop and commercialize pirfenidone in Japan, Korea and Taiwan. Both we and Shionogi have undertaken clinical trials seeking to demonstrate
that pirfenidone may positively affect lung function and disease progression in patients with IPF.

In May 2005, the American
Journal of Respiratory and Critical Care Medicine (AJRCCM) published results from a double-blind, randomized, placebo-controlled Phase 2 trial evaluating pirfenidone for the treatment of patients with IPF. This 107 patient study with a planned
12 month treatment period was conducted in Japan by Shionogi and was terminated after only nine months based on the recommendation of an independent Data Monitoring Committee (DMC) following an interim analysis. This analysis suggested
favorable effects of pirfenidone on acute exacerbations and other efficacy parameters in patients with IPF. In December 2006, Shionogi reported positive results from its pivotal Phase 3 trial conducted in Japan evaluating pirfenidone for the
treatment of patients with IPF. The trial was designed to evaluate a high-dose treatment regimen versus placebo for 52 weeks. A low-dose treatment arm was also included. The Shionogi Phase 3 trial, in which 261 patients were enrolled
and which used a measure of lung function called vital capacity (VC) as the primary endpoint, showed that pirfenidone significantly slowed the worsening of the disease. Both the high-dose group and the low-dose group showed statistically
significant positive results as compared to a placebo for the primary endpoint. Additionally, Shionogi reported a statistically significant improvement in progression-free survival (PFS), a key secondary endpoint, for the high-dose group
compared to placebo. In March 2007, Shionogi submitted an application to the Japanese



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Health Authorities for approval to market pirfenidone and in October 2008, received regulatory approval to market pirfenidone for the treatment of patients with IPF in Japan under the trade name
Pirespa®.

Our CAPACITY trials for pirfenidone, which were initiated in April 2006, included two separate, concurrent Phase 3 trials conducted at 110 centers in North America and Europe. In May 2007, we
completed enrollment of 779 patients with mild to moderate forms of IPF in the trials following our decision to refine and expand the CAPACITY program to include an increase in the number of patients enrolled and a lengthening of the treatment
duration. We began our CAPACITY trials following Shionogis successful Phase 2 clinical trial in which pirfenidone was generally well tolerated, with the most frequent side effects reported being photosensitivity, rash and gastrointestinal
symptoms. The primary endpoint of our CAPACITY trials was lung function, as measured by the change in forced vital capacity (FVC), which is believed to be an important measure of disease progression in IPF. Our CAPACITY program was
designed similarly to the Shionogi Phase 3 trial in that the maximum doses, on a mg/kg basis, were approximately the same and the primary endpoints (FVC versus VC) were expected to be clinically very similar. The CAPACITY trials were
longer (72 weeks versus 52 weeks) than the Shionogi Phase 3 trial, which we anticipated would allow for better statistical power to demonstrate the efficacy of pirfenidone. On February 3, 2009, we announced results from the two
Phase 3 CAPACITY studies. The primary endpoint of change in percent predicted FVC at Week 72 was met with statistical significance in CAPACITY 2 (p=0.001), along with the secondary endpoints of categorical change in FVC and PFS. The primary
endpoint was not met in CAPACITY 1 (p=0.501), but supportive evidence of a pirfenidone treatment effect was observed on a number of measures. Pirfenidone was safe and generally well tolerated in both CAPACITY studies.

We submitted our NDA for pirfenidone for the reduction of decline in lung function in IPF in the United States in November 2009. Our NDA
was accepted by the FDA and granted Priority Review on January 4, 2010. Priority Review designation may be granted by the FDA to an NDA for drugs that offer major advances in treatment, or that provide a treatment where no adequate therapy
exists. The designation has the potential to expedite the NDA approval process by reducing the target review period for the application from approximately ten to six months. While the results of the Shionogi studies had been shared with us by
Shionogi and had been published, we did not have access to the patient level database from the Shionogi studies and those data were not available to the FDA for review in connection with its evaluation of our NDA. During the course of its review of
the pirfenidone NDA, the FDA indicated that it would not consider the efficacy data from the Shionogi Phase 3 study in evaluating the efficacy of pirfenidone for purposes of our NDA. On March 9, 2010, the Pulmonary-Allergy Drugs Advisory
Committee (PADAC) of the FDA with a vote of 9 to 3 recommended approval of pirfenidone to reduce decline in lung function in patients with IPF. However, on May 4, 2010, we received a Complete Response Letter from the FDA requesting
an additional clinical trial to provide additional evidence of the efficacy of pirfenidone. On August 2, 2010, we and our advisors met with representatives of the Division of Pulmonary, Allergy and Rheumatology Products in the Office of Drug
Evaluation II of the FDA to gain a better understanding of the Complete Response Letter. In connection with that meeting, the FDAs representatives reiterated the request that we conduct an additional Phase 3 study to demonstrate the efficacy
of pirfenidone in IPF prior to U.S. marketing approval. Since that meeting, we evaluated several alternatives available to us including (i) formal dispute resolution with the FDA with respect to our NDA, (ii) resubmission of the NDA
including Phase 3 clinical study data from Shionogi & Co. Ltd. and (iii) pursuit of accelerated approval under 21 CFR 314  Subpart H which defines the process for accelerated approval of new drugs for serious or life-threatening
illnesses. We currently have no plans to pursue any of the aforementioned alternatives and have determined that we will move forward with the FDAs recommendation to initiate a new Phase 3 clinical study of pirfenidone that is expected to
demonstrate a clinically meaningful effect on forced vital capacity. We have a meeting scheduled with the FDA in March 2011 to discuss our plans regarding the additional Phase 3 clinical study of pirfenidone. We currently intend to have the first
patient enrolled in the new study during the first half of 2011.

In March 2010, we submitted a Marketing Authorization
Application (MAA) to the EMA seeking approval to market pirfenidone for the treatment of patients with IPF in the European Union. In December 2010, the CHMP of the EMA adopted a positive opinion recommending the granting of a marketing
authorization for pirfenidone within the European Union for the treatment in adults of mild to moderate IPF and effective February 28, 2011, pirfenidone was granted marketing authorization in all 27 member countries of the European Union for that
indication. Pirfenidone will be commercialized under the trade name Esbriet in the European Union and we currently plan our first commercial launch in Germany in September 2011. In addition to the 10 years of market exclusivity afforded by Orphan
Drug status in the European Union, we currently expect to have exclusive rights to sell Esbriet for the treatment of IPF within the European Union through late 2030, due to extended market exclusivity that is afforded by our portfolio of granted,
allowed and pending European patents relating to the safe and effective use of Esbriet.

In connection with the marketing
authorization in the European Union, we have committed to conduct routine safety surveillance of spontaneous adverse drug reactions (ADRs) and to conduct a PASS (Post Authorization Safety Study) in the form of a registry to
systematically collect and monitor ADRs in patients who have been prescribed Esbriet. The PASS Registry is expected to enroll 1,000 patients over two years and to follow these patients for a similar period. We also will conduct a drug-drug
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determine the impact of the antibiotic ciprofloxacin, a moderate CYP1A2 inhibitor, on the pharmacokinetics and safety of Esbriet in 25 healthy subjects. In addition, to help ensure the safe use
of Esbriet, we will implement a risk management plan (RMP) that includes routine safety monitoring of certain adverse reactions, a patient information leaflet and a safety checklist for physicians.

Research Pipeline

HCV Protease Inhibitors and NS5A Inhibitors

We are currently pursuing multiple pre-clinical research programs related to small molecules as follow-on compounds to danoprevir, including second-generation protease inhibitors and NS5A inhibitors for
the treatment of HCV.

In September 2002, we entered into a drug discovery collaboration agreement with Array BioPharma, Inc.
(Array) to discover novel small molecule protease inhibitors for the treatment of HCV. In late 2004, we amended the Array agreement to provide for the acquisition of certain intellectual property rights from Array.

Results from scientific studies presented at the Digestive Disease Week medical conference in May 2005 identified protease inhibitors as
a promising therapeutic class. In 2005, we presented several abstracts demonstrating high potency, favorable pharmacokinetics, including uptake into the liver, and encouraging tolerability for two of our oral HCV protease inhibitor compounds. In the
third quarter of 2005, we chose ITMN-191 (danoprevir) as our lead compound. Preclinical toxicology and pharmacokinetic studies in multiple species suggested that the danoprevir compound had attractive therapeutic characteristics for the
treatment of HCV, including significant liver exposure, slow dissociation from the NS3/4A protease and high in vitro potency and specificity. In October 2006, we entered into a collaboration agreement with Roche to develop and commercialize
products from our HCV protease inhibitor program, including the danoprevir compound, which was terminated in October 2010 in connection with our sale of danoprevir.

Sale of Danoprevir Rights

Danoprevir (formerly RG7227 and ITMN-191) is an
orally available HCV protease inhibitor currently in Phase 2b clinical testing. In October 2006 we entered into a collaboration agreement with Roche, described above, to develop and commercialize products from our HCV protease inhibitor program,
including our danoprevir compound. Pursuant to our collaboration with Roche, we had successfully progressed the danoprevir compound from pre-clinical testing into Phase 2b clinical development with generally positive clinical results. In October
2010, we sold our worldwide development and commercialization rights to danoprevir to Roche for $175.0 million in cash. In connection with this transaction, the collaboration agreement that we and Roche entered into in October 2006 along with its
amendments was terminated. Additionally, Roche has agreed to reimburse us for royalty and milestone obligations that we continue to have to Novartis Corporation and Array related to danoprevir.

Our Strategy

We intend
to use our current capital resources and any potential revenue provided by sales of Actimmune to:



| |  |  | Pursue the commercial launch of Esbriet in Germany, France, the United Kingdom, Italy, and Spain in the second half of 2011 and during 2012;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Continue our pursuit of the approval of pirfenidone for commercial sale in the United States by our initiation of an additional Phase 3 clinical study
during the first half of 2011;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Continue to fund our pre-clinical second generation protease inhibitor and NS5A inhibitor research programs for the treatment of HCV; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Continue to evaluate appropriate product acquisition candidates and opportunistically pursue strategic alliances and collaborative arrangements that we
believe could complement our existing focus in the areas of pulmonology and hepatology or in areas that we believe are advantageous to pursue.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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Discontinuation of Development of Actimmune

Previously, we were pursuing the development of Actimmune for the treatment of IPF. We reported data from our first Phase 3 clinical trial
of Actimmune for the treatment of IPF (GIPF-001) in August 2002. In December 2003, we initiated a second Phase 3 clinical trial of Actimmune for the treatment of patients with mild to moderate IPF (otherwise known as the INSPIRE trial).
Effective March 2007, we discontinued the Phase 3 INSPIRE trial based upon the recommendation of the studys independent DMC. We are no longer pursuing the development of Actimmune for the treatment of IPF or any other therapeutic indication.

Divestitures of Other Assets

In 2005, we divested our oritavancin and Amphotec assets as they no longer fit within our core focus areas of pulmonology and hepatology.

Oritavancin is a semi-synthetic glycopeptide antibiotic in development for the treatment of a broad range of infections caused by
gram-positive bacteria, including those resistant to other glycopeptides. In December 2005, we sold our worldwide rights to oritavancin to Targanta Therapeutics (Targanta) for upfront and potential clinical related milestone payments of
up to $9.0 million, of which $4.0 million had been received through March 31, 2009. We also received a convertible promissory note that was subsequently converted into capital stock of Targanta. In January 2009, The Medicines Company
commenced a tender offer to acquire all outstanding shares of Targanta. We tendered our shares and received approximately $6.0 million in March 2009 upon closing of the transaction. We may also receive up to an additional $4.05 per share in
contingent cash payments upon the achievement of specified regulatory and commercial milestones.

Amphotec is an FDA approved
lipid-form of amphotericin B indicated for the treatment of invasive aspergillosis in patients where renal impairment or unacceptable toxicity precludes the use of amphotericin B deoxycholate in effective doses, and in patients with invasive
aspergillosis where prior amphotericin B deoxycholate has failed. In May 2005, we sold Amphotec to Three Rivers for cash consideration and we also received contingent payments based on Three Rivers meeting future specified sales targets of Amphotec.
These sales targets were met and we received an aggregate $1.5 million from Three Rivers, $0.5 million in 2007 and $1.0 million in 2008. No future milestone payments are due under the agreement.

License, Collaboration and Other Agreements

Roche Asset Purchase Agreement (Danoprevir)

In October 2010, we
entered into an asset purchase agreement with Roche (the Asset Purchase Agreement) to sell our worldwide development and commercialization rights in danoprevir to Roche for $175.0 million in cash. The assets purchased by Roche pursuant
to the Asset Purchase Agreement included certain specified intellectual property, as well as certain regulatory filings, assumed contracts, books and records, and product data, in each case, related to danoprevir. In connection with the Asset
Purchase Agreement, Roche also assumed certain of our liabilities and obligations arising out of or related to certain of the assumed contracts, including certain milestone and royalty obligations payable to Novartis Corporation and Array. In
addition, we granted Roche an exclusive, irrevocable, non-terminable, fully paid-up license of certain of our intellectual property rights for use by Roche in the development and commercialization of danoprevir.

2006 Roche License and Collaboration Agreement (Protease Inhibitors)

In October 2006 we entered into a collaboration agreement with Roche. Under the arrangement, we agreed to collaborate with Roche to
develop and commercialize products from our HCV protease inhibitor program. The collaboration agreement included our former lead candidate compound, danoprevir, which entered Phase 2b clinical trials in 2009. We also agreed to collaborate with Roche
on a research program to identify, develop and commercialize novel second-generation HCV protease inhibitors. In connection with the sale of our rights in danoprevir to Roche, the collaboration agreement was terminated. Roche has agreed to reimburse
us for royalty and milestone obligations that we continue to have to Novartis Corporation and Array related to danoprevir.

Under the terms of the 2006 collaboration arrangement, we agreed to conduct Phase 1 studies of danoprevir, and thereafter Roche agreed to
lead clinical development and commercialization. Upon entering into the agreement, we received an upfront payment of $60.0 million from Roche. The agreement had provided for us to potentially receive up to an aggregate of $470.0 million in milestone
payments. One such milestone payment of $10.0 million was received in January 2007, which was not deemed to be substantive and



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at-risk at the execution of the Collaboration Agreement. The upfront payment of $60.0 million and this $10.0 million milestone payment were deferred and were recognized ratably as collaboration
revenue over the previous estimated life of the collaboration agreement and our expected continued involvement in the arrangement. In 2007, 2008 and 2009 we also received $10.0 million, $15.0 million and $20.0 million in milestone payments,
respectively, which were recognized as revenue upon receipt. Roche agreed to fund 67% of the global development costs of danoprevir and, upon approval for commercialization by the FDA, we agreed to co-commercialize the product in the United States
and share profits on a 50-50 basis with Roche. We were also entitled to receive royalties on any sales of the product outside of the United States.

2010 Roche Collaboration Agreement (Second-generation Protease Inhibitors)

In December 2010, we entered into an agreement with Roche that will focus on research to identify and develop next-generation protease inhibitors for the treatment of HCV. Under terms of the agreement,
Roche will fund all research costs related to the programs for the term of the agreement, July 1, 2010 to June 30, 2011. InterMune will be entitled to receive certain milestones and royalties in connection with the continued development
and commercialization by Roche of licensed compounds resulting from this new collaboration. Additionally, we expect to continue to pursue independently our research program related to NS5A inhibitors which are not included as part of the new
collaboration agreement with Roche.

Genentech, Inc. License Agreement (Actimmune®)

In 1998, we obtained a license from Genentech, Inc. (Genentech) through Connetics Corporation (Connetics) for patents relating to Actimmune. The license from Genentech terminates
on the later of May 5, 2018 or the date that the last of the patents licensed under the agreement expires. Our licensed Actimmune rights include exclusive and non-exclusive licenses. The exclusive licenses include the right to develop and
commercialize Actimmune in the United States and Canada for the treatment and prevention of all human diseases and conditions, including infectious diseases, pulmonary fibrosis and cancer, but excluding arthritis and cardiac and cardiovascular
diseases and conditions. The non-exclusive licenses include the right to make or have made Actimmune for clinical and commercial purposes within our field of use in the United States and Canada. In Japan, we have the exclusive license rights to
commercialize Actimmune for the treatment and prevention of all infectious diseases caused by fungal, bacterial or viral agents, including in patients with CGD or osteopetrosis. We also have the opportunity, under specified conditions, to obtain
further rights to Actimmune in Japan and other countries. In addition, we received an exclusive sublicense under certain of Genentechs patents outside the United States, Canada and Japan under the BI agreement discussed below. Under the
Genentech license, we pay Genentech royalties on the revenue from sales of Actimmune based on a royalty rate of 45% for the first $3.7 million of revenue and 10% for any additional revenue, and are required to make one-time payments to Genentech
upon the occurrence of specified milestone events, which include the submission of a BLA with the FDA for approval to market Actimmune for the treatment of particular categories of diseases, the receipt of FDA approval to market Actimmune for the
treatment of particular categories of diseases and the achievement of certain annual revenue targets for Actimmune. We made royalty payments of approximately $86.7 million in the aggregate, but no milestone payments, under this agreement
through December 31, 2010. If all of the milestones under this agreement are achieved, we would be required to make further milestone payments of $9.6 million, although we have no further development plans for Actimmune. We must satisfy
specified diligence obligations under the agreement with Genentech to maintain our license from Genentech and we believe that we are in compliance with such obligations. Our rights to certain therapeutic uses for Actimmune under this agreement could
revert to Genentech if we do not meet our diligence obligations or otherwise commit a material breach of the agreement.

Boehringer Ingelheim International GmbH (Imukin®)

In 2001, we formed a collaboration with BI to clinically develop and seek regulatory approval for interferon gamma-1b,
the active ingredient in Actimmune, in certain diseases, and to commercialize a liquid formulation of interferon gamma-1b under one or more of BIs trade names, including Imukin, in Europe and other major markets of the world (other than the
United States, Canada and Japan). Under the agreement, the parties may seek to develop and obtain regulatory approval for the use of Imukin in the treatment of a variety of diseases, including IPF, ovarian cancer, CGD and osteopetrosis. The
agreement provides that in return for our funding and managing clinical and regulatory development of interferon gamma-1b for these diseases in the countries covered by the agreement, BI will pay us royalties on sales of the product when it meets a
specified minimum sales level. BI has an option to exclusively promote Imukin in all of the major market countries covered by the agreement, and we may opt to promote the product in those countries and for those new diseases for which BI does
not do so. If we opt to promote the product in those countries or for those new diseases for which BI does not, we will pay royalties to BI on sales of the product in those countries and/or for those new diseases based on royalty rates that are in
the single digits. We had neither paid nor received any royalties under this agreement through December 31, 2010, and there are no milestone payments under this agreement. The agreement will expire, on a country-by-country



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basis, upon expiration of the parties royalty obligations in each country covered by the agreement. Such royalty obligations generally expire fifteen years after regulatory approval of
Imukin for certain specified indications in the relevant country. If no such regulatory approvals are granted in a particular country, the royalty obligations in such country will expire in 2016. Prior to such expiration, either party can terminate
the agreement for the uncured material breach of the other party or for the insolvency of the other party. In addition, we have the right to terminate the agreement with respect to certain countries at any time subsequent to regulatory approval for
IPF.

Connetics Corporation (acquired by Stiefel Laboratories, Inc.) (Actimmune®)

Through an assignment and option agreement with Connetics, we paid Connetics $5.7 million to acquire rights to Actimmune and we remain obligated to pay to Connetics a royalty of 0.25% of our net
United States sales for Actimmune until our net United States sales cumulatively surpass $1.0 billion. Above $1.0 billion, we are obligated to pay a royalty of 0.5% of our net United States sales of Actimmune. Through a separate purchase
agreement, we paid Connetics $0.4 million to acquire rights related to scleroderma and are obligated to pay Connetics a royalty of 4.0% on our net revenue from sales of Actimmune for the treatment of scleroderma. We made royalty payments of
approximately $1.8 million in the aggregate through December 31, 2010. There are no milestone payments pursuant to this agreement.

Marnac, Inc./KDL GmbH (Pirfenidone)

In 2002, we licensed from
Marnac and its co-licensor, KDL, their worldwide rights, excluding Japan, Korea and Taiwan to develop and commercialize pirfenidone for all fibrotic diseases, including renal, liver and pulmonary fibrosis. Under the agreement terms, we received an
exclusive license from Marnac and KDL in exchange for an up-front cash payment of $18.8 million, future milestone payments and up to 9% royalty payments. During the third quarter of 2007, we recorded a $7.5 million expense for such milestone
payments, which were based on the progress of clinical development of pirfenidone. If all of the milestones under this agreement had been achieved, we would have been required to make milestone payments of $14.5 million. Effective
November 21, 2007, we entered into asset purchase agreements with Marnac and KDL whereby we effectively terminated the prior license agreement by purchasing, among other things, the pirfenidone-related assets covered by such prior license
agreement. Under the terms of the asset purchase agreements, we made acquisition payments of approximately $13.7 million, which includes the $7.5 million expense recorded in the third quarter of 2007 relating to the 2002 license agreement. We also
made a milestone payment of $13.5 million in March 2009 in connection with our decision to proceed with regulatory approval for pirfenidone. Future contingent acquisition payments of up to an additional $40.0 million are required to be made by us
only if positive Phase 3 data and product approval in the United States and European Union are achieved, $20.0 million for each region respectively. In March 2011, we received authorization to market Esbriet (pirfenidone) in the European Union and
are now required to make a milestone payment of $20.0 million in the aggregate to Marnac and KDL. The asset purchase agreements do not affect the rights to pirfenidone in Japan, Korea and Taiwan, which rights are licensed by Marnac and KDL to
Shionogi. Since the original 2002 license agreement has been effectively terminated as a result of our acquisition of such pirfenidone-related assets from Marnac and KDL, we no longer have milestone or royalty obligations thereunder.

Shionogi Clinical Data License

In February 2010, we entered into a license agreement with Shionogi to obtain access to certain patient level data from the Shionogi Phase 3 clinical trial with pirfenidone in patients with IPF
(SP3). This license provides that we pay Shionogi a royalty on pirfenidone sales in a particular jurisdiction for a specified period of time in the event (i) we use the SP3 patient level data as pivotal study data (as defined
in the license) in connection with a particular regulatory filing in such jurisdiction, and (ii) the regulatory filing that uses SP3 patient level data as pivotal study data is approved. We did not use SP3 patient level data as pivotal study data in
our recently approved EU MAA or in any other submissions in connection with review of the EU MAA. Similarly, we did not use SP3 patient level data as pivotal study data in our US NDA or in any other submissions in connection with review of the US
NDA, as indicated by the FDA in its Complete Response Letter relating to our US NDA for pirfenidone to treat patients with IPF. Going forward, we may elect to use SP3 patient level data as pivotal study data in our regulatory filings in the United
States or in other jurisdictions. Should we elect to do so, and should the regulatory filing containing such SP3 patient level data be approved, we may owe a royalty to Shionogi on sales of pirfenidone in such jurisdiction for a specified period of
time.

Novartis Corporation (Small Molecule Therapeutics)

In 2004, we entered into a license agreement with Chiron Corporation (subsequently acquired by Novartis) which granted us the right to
discover, develop and commercialize small molecule therapeutic agents against certain HCV targets that are covered by patents owned by Novartis. In consideration for this license, we paid Novartis a nonrefundable fee of approximately $0.4 million in
2004 and are required to make milestone payments based on the clinical progress of danoprevir. In 2006, we expensed $0.5 million upon initiation of the Phase 1a clinical trials for danoprevir, and made a milestone payment of approximately $0.8
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associated with the initiation of the Phase 2b clinical trial for danoprevir. Assuming that all of the remaining milestones under this agreement are achieved, we will be required to make future
milestone payments of $3.8 million, which Roche has agreed to assume and pay in connection with our sale of danoprevir to Roche. In addition, Novartis is entitled to receive royalties on future product sales of danoprevir based on royalty rates
that are in the single digits. The agreement with Novartis provides that the Companys obligation to make milestone payments and pay royalties will extend until August 24, 2024, notwithstanding the expiration of the last valid patent
covered by the agreement. Novartis has the right to terminate the agreement at its sole discretion in the event of a material uncured breach by the Company or if the Company challenges patents covered by the agreement, as set forth in the agreement.
The agreement is also subject to certain customary provisions regarding termination upon a bankruptcy event, as set forth in the agreement.

Array BioPharma Inc. (Small Molecule Therapeutics)

In 2002, we
entered into a drug discovery collaboration agreement to create small molecule therapeutics targeting hepatitis with Array. Under that agreement, we fund drug discovery research conducted by Array during the research term based on the number of
Array scientists working on the research phase of the agreement and we are responsible for all development and commercialization. Though the research phase of the agreement expired in June 2007, Array will continue to be entitled to receive
milestone payments under the agreement based on the selection and progress of clinical drug candidates, as well as low single-digit royalties on net sales of products derived from the collaborative efforts. In addition, in December 2004, the
agreement was amended to provide a mechanism for us to purchase certain intellectual property rights arising from the collaboration. The agreement with Array provides that our obligation to pay royalties will extend until the expiration of the last
valid patent claim covering licensed product on a country-by-country and product-by-product basis, which may not occur until May 9, 2028, provided that such term is subject to modification of the term of the underlying patents. We have the
right to terminate this agreement upon written notice to Array and either party may terminate the agreement in the event of a material uncured breach by the other party, in accordance with the terms of the agreement. The agreement is also subject to
certain customary provisions regarding termination upon a bankruptcy event, as set forth in the agreement. In April 2005, we initiated a second research collaboration with Array with respect to a new hepatology target and have since terminated that
agreement. We made a milestone payment of $1.0 million under this agreement in 2009 associated with the initiation of the Phase 2b clinical study of danoprevir. We did not make any payments to Array in 2010 or 2008. Assuming that all of the
remaining milestones under the Array agreements are achieved, we will be required to make future milestone payments of $7.5 million, which Roche has agreed to assume and pay in connection with our sale of danoprevir to Roche. Total research and
development expenses related to this agreement were $1.3 million for the year ended December 31, 2007, which did not include any milestone payments.

Manufacturing

We enter into contractual arrangements with qualified
third-party manufacturers to manufacture and package our products and product candidates. This manufacturing strategy enables us to direct financial resources to the development and commercialization of products rather than diverting resources to
establishing a manufacturing infrastructure.

Boehringer Ingelheim Austria GmbH (Actimmune®)

In January 2000, we entered into an agreement with BI for the clinical and commercial supply of Actimmune. The agreement, which had been amended from time to time, generally provided for the exclusive
supply by BI and exclusive purchase by us of Actimmune. This contractual obligation to BI was denominated in euros. Prior to the failure of the INSPIRE trial, we had future purchase obligations of approximately $91.6 million. Following the
unsuccessful outcome from the Phase 3 INSPIRE trial that was discontinued in March 2007, we entered into a termination agreement (Termination Agreement) with BI. The Termination Agreement provided for the termination of the existing
supply agreement dated January 2000, as amended, for the clinical and commercial supply of Actimmune conditioned upon and coincident with the entry by us and BI into a new agreement for the clinical and commercial supply of Actimmune. In
consideration of the entry into the Termination Agreement, we incurred approximately $6.8 million in termination expenses during the second quarter of 2007. Pursuant to the Termination Agreement and new supply agreement, we eliminated $91.6 million
in future purchase commitments for Actimmune for the years 2007 to 2012. On June 29, 2007, we entered into a new agreement with BI for the clinical and commercial supply of Actimmune (Supply Agreement). Under the terms of the new
Supply Agreement, we are not required to make any minimum annual purchase commitments and BI is not required to commit to reserving any minimum annual capacity for the manufacture of Actimmune. On a going forward basis, the product will be purchased
based upon a rolling forecast. The new Supply Agreement was effective as of June 29, 2007 and will expire on December 31, 2012. If BI is not able to supply all of our requirements for Actimmune in the future, we may choose an additional
manufacturer. However, we are not entitled to seek such a secondary source until BI has informed us of its unwillingness or inability to meet our requirements. Either party has the right to terminate the Supply Agreement if the other party
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obligations thereunder. In addition, we have the right to terminate the Supply Agreement immediately in the event that health authorities prevent distribution of Actimmune for all indications.

ACIC Fine Chemical, Inc. and Signa C.V. (pirfenidone)

On May 13, 2004, we entered into a purchase agreement with ACIC Fine Chemicals Inc. (ACIC) to supply us with a finite
amount of API for the manufacturing of pirfenidone. Under a separate agreement with Signa C.V. (Signa), ACIC sub-contracted the manufacturing of this finite amount of API for pirfenidone to Signa. Under such purchase agreement, we would
acquire the API for pirfenidone from ACIC on an as-needed purchase order basis.

In January 2009, we entered into a definitive
supply agreement with Signa and ACIC for the clinical and commercial supply of the API for pirfenidone, which agreement replaces and supersedes the purchase agreement described above. The agreement generally provides for the exclusive supply by
Signa and ACIC and the exclusive purchase (except in certain limited circumstances) by us of the API for pirfenidone with respect to the territories where we hold exclusive rights to pirfenidone. Under the terms of this supply agreement, we are not
required to make any minimum annual purchases. The pirfenidone API will be purchased by us based upon a rolling forecast. The supply agreement was made effective as of December 17, 2008 and will continue for the longer of (i) 10 years
thereafter or (ii) seven years from the date of approval of a finished product containing the API for pirfenidone. If Signa and ACIC are not able to supply all of our requirements for the API for pirfenidone, we may purchase the API from a
second source third party supplier. Either party has the right to terminate the supply agreement if the other party materially breaches its obligations thereunder or in the event the manufacture, use, sale or importation of the API is found to be
infringing of a third partys intellectual property rights and such third party is unwilling to provide either Signa and ACIC or us with a license. In addition, we have the right to terminate the supply agreement in the event it is not
commercially reasonable for us to sell or purchase the API or a finished product containing the API.

Catalent Pharma
Solutions LLC (pirfenidone)

In September 2009, we entered into a commercial manufacturing agreement with Catalent
Pharma Solutions, LLC (Catalent) to process and encapsulate the API for pirfenidone and to supply us with bulk pharmaceutical pirfenidone product for commercial use. The agreement generally provides for the exclusive supply by
Catalent and the exclusive purchase (except in certain limited circumstances) by us of the bulk pharmaceutical pirfenidone product with respect to certain territories where we hold exclusive rights to pirfenidone. In the fourth year of the
agreement, Catalents exclusive supply and our exclusive purchase obligations under the agreement will only apply to 50% of our commercial requirements for the bulk pharmaceutical pirfenidone product in the United States while supply and
purchase obligations of the parties under the agreement will be non-exclusive for the other geographical territories subject to the agreement. Furthermore, after the fifth year of the agreement, the supply and purchase obligations of the
parties under the agreement will become non-exclusive for all territories subject to the agreement. Under the terms of this agreement, we are not required to make any minimum annual purchases. The bulk pharmaceutical pirfenidone product is
required to be purchased by us based upon a rolling forecast. The agreement was made effective as of September 10, 2009 and is scheduled to continue for an initial term of five (5) years from the date of our commercial launch of
pirfenidone, if approved by a regulatory agency, subject to renewal. If Catalent is not able to supply all of our requirements for the bulk pharmaceutical pirfenidone product, we may purchase such product from a second source supplier. Either
party has the right to terminate the supply agreement if the other party materially breaches its obligations thereunder.

Patents and
Proprietary Rights

Based on our own internal research efforts, we have filed numerous patents relating to the use of
interferons to treat a variety of diseases in the areas of pulmonology, hepatology and oncology. In addition, we have filed for patents on a number of small molecules in hepatology and pulmonology.

Actimmune®

We have acquired an exclusive
license under certain Genentech patents to develop, use and sell interferon gamma-1b, the active ingredient in Actimmune, in particular fields in the United States, Canada and Japan under our license agreement with Genentech. This license agreement
covers more than 12 United States patents and related foreign patents and/or patent applications filed in Japan and Canada. Certain of the United States patents covering DNA vectors and host cells relating to interferon gamma-1b expired in 2005 and
2006 without material impact to our business. In addition, a United States patent relating to the composition of interferon gamma-1b will expire in 2014. Other material United States patents expire between 2009 and 2013. Under the Genentech license,
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Genentech royalties on the sales of Actimmune, and are required to make one-time payments to Genentech upon the occurrence of specific milestone events, which include the submission of a BLA with
the FDA for approval to market Actimmune for the treatment of particular categories of diseases, the receipt of FDA approval to market Actimmune for the treatment of particular categories of diseases and the achievement of certain annual revenue
targets for Actimmune. Two United States composition-of-matter patents acquired from Amgen covering interferon-gamma analogs, including interferon gamma-1b, expire in 2022.

Pirfenidone

The composition of matter patents for pirfenidone
expired in the 1990s. In 2002, we licensed from Marnac and its co-licensor KDL certain worldwide rights, excluding Japan, Korea and Taiwan, to develop and commercialize pirfenidone for all fibrotic diseases, including renal, liver and
pulmonary fibrosis covered by certain of their use patents. Effective November 21, 2007, we entered into asset purchase agreements with Marnac and KDL whereby we effectively terminated the prior license agreement by purchasing, among other
things, the pirfenidone-related assets covered by such prior license agreement. Among the patents we purchased under the asset purchase agreements are U.S. Patent Nos. 5,310,562; 5,962,478; 6,090,822, 6,300,349 and related foreign equivalents. When
U.S. Patent No. 5,310,562 expires in 2011, we will not be able to use this patent to block others from marketing pirfenidone for the treatment of fibrotic disorders in the United States, except to the extent we are able to secure additional
intellectual property in connection with treating specific diseases. We also own the European counterpart of this patent in Germany and the United Kingdom that will expire in 2021 with a Supplemental Patent Certificate. In addition to the patents we
acquired from Marnac and KDL, we have been pursuing additional pirfenidone-related intellectual property including patent rights relating to the safe and effective use of pirfenidone based upon observations from our extensive clinical development of
pirfenidone. We currently have five additional patents granted in the United States covering the safe use and administration of pirfenidone to IPF patients as well as one patent issued, two allowed and several patents pending in the European Union.
These patents and pending applications have expiration dates between 2026 and 2030, and we currently anticipate that these patents will provide us with additional market exclusivity following the expiration of orphan drug status in 2021. Certain of
these patents have application beyond the treatment of IPF. We will only enjoy market exclusivity for a particular indication in countries in which we have (i) regulatory exclusivity such as orphan drug status, (ii) new chemical entity
data exclusivity, or (iii) patent protection. For a description of certain intellectual property issues relating to the intellectual property we acquired and the other intellectual property we are pursuing, please see Item 1A. Risk
Factors- Following expiration of orphan drug designation in the European Union and if approved for commercial use by the FDA in the United States, our intellectual property portfolio may not prove to be sufficient to protect the exclusivity of
pirfenidone for the treatment in adults of mild to moderate IPF below.

HCV Protease and NS5A Inhibitors

In late 2004, we purchased from Array certain co-ownership rights in patents related to the HCV protease inhibitor,
danoprevir, such that we held exclusive ownership rights in the patent applications and issued patents covering danoprevir. These patents were sold to Roche in connection with our divestiture of danoprevir in 2010. We continue to co-own certain
patent rights with Array relating to certain HCV protease inhibitors to which we hold an exclusive license. We also exclusively own certain independently developed patent rights related to HCV protease inhibitors that are subject to our current
research collaboration with Roche, as well as patent rights relating to our pre-clinical program for HCV NS5A inhibitors.

Competition

Actimmune® for CGD and Severe Malignant Osteopetrosis

Actimmune is the only FDA approved therapy for CGD and severe, malignant osteopetrosis and we are not aware of any competitive products available or in development for these indications. However, in
general, our products and product candidates face competition from other currently available or development-stage therapies.

Pirfenidone for IPF

There is currently no FDA approved therapy available for the treatment of IPF. In March 2011, pirfenidone was granted marketing authorization in the European Union for the treatment in adults of mild to
moderate IPF. We believe that the primary competition for pirfenidone in the European Union and in the U.S., if pirfenidone is approved by the FDA for the treatment of IPF, will initially consist of products that are approved for other indications
including corticosteroids and N-acetylcysteine. The competitive landscape for new IPF products has changed over the last 12 months. In 2007, a Phase 3 clinical trial for bosentan was initiated by Actelion Pharmaceuticals, Ltd.
(Actelion) and initial results were published in March 2010. Tracleer failed to meet its primary endpoint in this clinical trial and as a result, Actelion indicated it does not intend to initiate regulatory proceedings. Actelion has
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patients with IPF in a new exploratory study with macitentan, a tissue-targeting endothelin receptor antagonist. In January 2009, Gilead Sciences, Inc. (Gilead) initiated a Phase 3
clinical study of ambrisentan for the treatment of IPF that was halted due to lack of efficacy in December 2010. However, in December 2010, Gilead entered into an agreement to acquire Arresto Biosciences (Arresto) gaining Gilead access to
Arrestos Phase 1 humanized monoclonal antibody compound, AB0024, currently in clinical development for the treatment of IPF. Boehringer Ingelheim recently presented Phase 2 data for BIBF-1120, a triple kinase inhibitor that has showed some
potential efficacy at high doses in IPF.

Protease Inhibitor for HCV

In the field of hepatology there are multiple drug candidates in development for hepatitis C, including immunomodulators, synthetic
interferons, ribavirin analogs, protease inhibitors, polymerase inhibitors, viral budding inhibitors, monoclonal antibodies and RNAi knockdown techniques. In the field of HCV protease inhibitors, several other companies have protease inhibitor drugs
in development, including Gilead, Merck & Co., Pfizer, Inc., GlaxoSmithKline, Vertex Pharmaceuticals, Inc. and Tibotec, Inc. Many of these companies have substantially greater financial, technical and human resources than we do, have a
significant lead in terms of timing of clinical development and are more experienced in the development of new drugs than we are.

Commercial Operations

Pirfenidone (Esbriet®)

To support our anticipated marketing efforts in Europe for the sale of Esbriet, we are currently
expanding our commercial infrastructure within the European Union, including an increase to our employee headcount in that region. On December 17, 2010, we announced several additions to our senior leadership team in support of our
commercialization efforts in addition to the announcement of the establishment of our European headquarters in Reinach, Switzerland. In Europe, Esbriet is expected to be sold primarily through distributors to hospitals and pharmacies.

Actimmune®

We have maintained a strategic
marketing group that continues to support the supply and reimbursement of Actimmune for its labeled indications, CGD and severe, malignant osteopetrosis. In the United States, Actimmune is sold primarily to distributors and specialty pharmacies who
distribute directly to patients. During the year ended December 31, 2010, the primary specialty pharmacies and distributors for Actimmune were CuraScript, Inc. (formerly Priority Healthcare, Inc.), Nova Factor, Inc. and Caremark, Inc., which
accounted for 33%, 27% and 18%, respectively, of our total net product sales.

Medical Affairs

We have a Medical Affairs Department that maintains current, scientific-based information about pulmonology and hepatology for the benefit
of heath care providers, patients and caregivers, as well as our employees. Other functions of our Medical Affairs Department are medical education, medical information, publications and administration.

Total Revenue by Geographic Region

Our total revenue by region for the years ended December 31 2010, 2009 and 2008, were as follows (in thousands):



|                     |  |      |         |  |      |   |        |      |  |   |        | 
|-------------------- |  | ---- | ------- |  | ---- | - | ------ | ---- |  | - | ------ | 
|                     |  | 2010 |         |  | 2009 |   |        | 2008 | 
|United States        |  | $    | 19,875  |  |      | $ | 25,231 |      |  | $ | 29,791 | 
|Europe and other (1) |  |      | 239,416 |  |      |   | 23,469 |      |  |   | 18,361 | 
|                     |  |      |         |  |      |   |        |      |  |   |        | 
|Total                |  | $    | 259,291 |  |      | $ | 48,700 |      |  | $ | 48,152 | 
|                     |  |      |         |  |      |   |        |      |  |   |        | 



|(1) | Total Europe and other revenue in 2010 includes $175.0 million from the sale of our rights to danoprevir to Roche and the acceleration of $57.3 million of previously
deferred revenue related to the termination of our 2006 collaboration agreement with Roche.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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Government Regulation and Product Approval

The FDA and comparable regulatory agencies in state and local jurisdictions and in foreign countries impose substantial requirements upon
the clinical development, manufacture and marketing of pharmaceutical products. These agencies and other federal, state and local entities regulate research and development activities and the testing, manufacture, quality control, safety,
effectiveness, labeling, storage, record keeping, approval, advertising and promotion of our products. We believe that our products will be regulated as biologics or drugs by the FDA.

The EMA, or European Medicines Agency, is a centralized body of the European Union whose main responsibility is the protection and
promotion of public health through the evaluation and supervision of medicines for human use. The EMA coordinates the evaluation and supervision of medicinal products throughout the 27 European Union member states in a network of 42 national
competent authorities.

The process required by the FDA before our potential products, or previously approved products to be
marketed for the treatment of new diseases in the United States generally involves the following:



| |  |  | preclinical laboratory and animal tests;
| | - |  | ----------------------------------------



| |  |  | submission of an IND, which must become effective before clinical trials may begin;
| | - |  | -----------------------------------------------------------------------------------



| |  |  | adequate and well-controlled human clinical trials to establish the safety and efficacy of the proposed drug for its intended use; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------



| |  |  | FDA approval of a new BLA, a new NDA, or a BLA or NDA supplement.
| | - |  | -----------------------------------------------------------------

The testing and approval process requires substantial time, effort and financial resources, and we cannot be certain that any new
approvals for our products will be granted on a timely basis, if at all.

Prior to commencing a clinical trial in the United
States, we must submit an IND to the FDA. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA, within the 30-day time period, raises concerns or questions about the application. In such a case, the IND
sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. Our submission of an IND may not result in FDA authorization to commence such a clinical trial. Further, an independent institutional review board
(IRB) for each medical center proposing to conduct the clinical trial must review and approve the plan for any clinical trial before it commences.

For purposes of NDA or BLA approval, human clinical trials in the United States are typically conducted in three sequential phases that may overlap.



| |  |  | Phase 1: The drug is initially introduced into healthy human subjects or patients and tested for safety, dosage tolerance, absorption,
metabolism, distribution and excretion.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Phase 2: Studies are conducted in a limited patient population to identify possible adverse effects and safety risks, to determine the
efficacy of the product for specific targeted diseases and to determine dosage tolerance, optimal dosage and dosage frequency. These Phase 2 clinical trials may be divided into early Phase 2 clinical trials, which are referred to as Phase 2a
clinical trials, during which pilot studies are performed to determine initial activity and late Phase 2 clinical trials, which are referred to as Phase 2b clinical trials, that generally consist of controlled trials often involving several hundred
patients in traditional drug development programs.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Phase 3: When Phase 2 clinical trials demonstrate that a dosage range of the product is effective and has an acceptable safety
profile, Phase 3 clinical trials are undertaken to further evaluate dosage, to provide statistically and clinically significant evidence of clinical efficacy and to further test for safety in an expanded patient population at multiple clinical
study sites. It is possible for a drug that appears promising in a Phase 2 clinical trial to fail in a more rigorous and reliable Phase 3 clinical trial. For example, after Actimmune had shown promising results for the treatment of IPF in an
investigator sponsored Phase 2 clinical trial, our initial Phase 3 study of Actimmune for the treatment of IPF failed to show significant effect on the primary endpoint of progression-free survival or on secondary endpoints of lung function and
quality of life.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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In the case of products for severe or life-threatening diseases such as IPF, the initial
human testing is often conducted in patients rather than in healthy volunteers. Because these patients already have the target disease, these studies may provide initial evidence of efficacy traditionally obtained in Phase 2 clinical trials, and
thus these trials are frequently referred to as Phase 1/2 clinical trials.

We may not successfully complete Phase 1, Phase 2
or Phase 3 clinical trial testing of our product candidates within any specific time period, if at all. Furthermore, the FDA or an IRB or the sponsor may suspend a clinical trial at any time on various grounds, including a finding that the
subjects or patients are being exposed to an unacceptable health risk.

The FDA may require, or companies may pursue,
additional clinical trials after a product is approved. These are called Phase 4 studies. The results of Phase 4 studies can confirm the effectiveness of a drug and can provide important safety information to augment the FDAs adverse drug
reaction reporting system. For example, we have ongoing Phase 4 post-marketing commitments to the FDA relating to Actimmune for the treatment of osteopetrosis including a registry and drug interaction study. Such studies were completed and submitted
to the FDA in 2006.

The results of product development, preclinical studies and clinical trials are submitted to the FDA as
part of a BLA or NDA, or as part of a BLA or NDA supplement for approval as a treatment for a new disease if the product is already approved for a disease. The FDA may deny approval of a BLA, NDA or BLA or NDA supplement if the applicable regulatory
criteria are not satisfied, or it may require additional clinical data. Even if such data are submitted, the FDA may ultimately decide that the BLA, NDA or BLA or NDA supplement does not satisfy the criteria for approval.

Once issued, the FDA may withdraw product approval if compliance with regulatory standards is not maintained or if problems occur after
the product reaches the market. In addition, the FDA may require testing and surveillance programs to monitor the effect of approved products that have been commercialized, and the FDA has the power to prevent or limit further marketing of a product
based on the results of these post-marketing programs.

A company seeking approval of an abbreviated new drug application
(ANDA), for the use of an approved drug that is subject to another companys patent may have to certify to that patent and notify the owner of the NDA and patent for such drug that it is seeking approval. If the patent owner or
licensee files a patent infringement lawsuit, FDA approval of the ANDA for which certification is made may be deferred pending the outcome of the lawsuit.

Satisfaction of FDA requirements or similar requirements of state, local and foreign regulatory agencies typically takes several years and the actual time required may vary substantially, based upon the
type, complexity and novelty of the product or disease. Government regulation may delay or prevent marketing of potential products or of approved products for new diseases for a considerable period of time and impose costly procedures upon our
activities. We cannot be certain that the FDA or any other regulatory agency will grant approvals for our product candidates or for use of our approved products for new diseases on a timely basis, if at all. Success in early stage clinical trials
does not ensure success in later stage clinical trials. Data obtained from clinical activities is not always conclusive and may be susceptible to varying interpretations, which could delay, limit or prevent regulatory approval. Even if a product
receives regulatory approval, the approval may be significantly limited to specific diseases, patient subgroups and dosages. Further, even after regulatory approval is obtained, later discovery of previously unknown problems with a product may
result in restrictions on the product or even complete withdrawal of the product from the market. Delays in obtaining, or failures to obtain, initial regulatory approval for any of our product candidates, or additional regulatory approvals for new
indications of our approved products, would harm our business. In addition, we cannot predict what adverse governmental regulations may arise from future United States or foreign governmental action.

Any products we manufacture or distribute pursuant to FDA approvals are subject to continuing regulation by the FDA, including
record-keeping requirements and reporting of adverse experiences with these products. Drug manufacturers and their subcontractors are required to register their establishments with the FDA and other government agencies, and are subject to periodic
unannounced inspections by the FDA and certain state agencies for compliance with good manufacturing practices, which impose certain procedural and documentation requirements upon us and our third-party manufacturers. We cannot be certain that we or
our present or future suppliers will be able to comply with the good manufacturing practices regulations and other FDA regulatory requirements.

Physicians may prescribe legally available drugs for uses that are not described in the products labeling and that differ from those tested by us and approved by the FDA. Such off-label uses are
common across medical specialties. For example, we are aware that physicians are prescribing Actimmune for the treatment of IPF, although we do not promote Actimmune for the treatment of IPF, and the FDA has not approved the use of Actimmune
for the treatment of this disease. Substantially all of our Actimmune revenue is derived from physicians prescriptions for off-label use. The FDA does not regulate the behavior of physicians in their choice of



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treatments. The FDA does, however, restrict manufacturers communications on the subject of off-label use. Companies cannot promote FDA-approved drugs for off-label uses. A company may
engage in truthful, non-misleading, and non-promotional speech concerning its products. We may also educate physicians about a particular disease state and how that disease is properly diagnosed so that patients who qualify for the clinical trial
might be identified. We also may survey physicians who are lawfully prescribing our products for off-label uses to monitor patients experiences, particularly as to whether safety issues have arisen. We may also, pursuant to FDA policies,
respond to unsolicited requests from health care professionals and engage in appropriate scientific exchange of information about unapproved uses. We have engaged in these lawful activities in the past and continue to engage in some of them today.
We have polices and procedures in place to regulate the lawful promotion of our marketed products within their labeled indications. Employees are trained to follow these policies and procedures and must certify that they will abide by them. The FDA
actively enforces regulations prohibiting promotion of off-label uses and the promotion of products for which marketing approval has not been obtained. While we believe we are currently in compliance with the FDAs regulations relating to
off-label promotion, the regulations are subject to varying interpretations which continue to evolve. Failure to comply with these requirements in the past or with respect to future activities can result in regulatory enforcement action by the FDA
and other governmental bodies, which would have an adverse effect on our revenue, business and financial prospects. On November 9, 2004 we received a subpoena from the U.S. Department of Justice requiring us to provide the Department of
Justice with certain information relating to Actimmune, including information regarding the promotion and marketing of Actimmune. On October 25, 2006 we reached a comprehensive settlement with the government to resolve all claims without
criminal sanctions relating to promotional activities for Actimmune for IPF by former InterMune employees during a period ending in June 2003. For a more complete description of this matter see Item 3. Legal Proceedings below.

The FDAs policies may change and additional government regulations may be enacted which could prevent or delay
regulatory approval of our potential products or approval of new diseases for our existing products. We cannot predict the likelihood, nature or extent of adverse governmental regulation that might arise from future legislative or administrative
action, either in the United States or abroad.

Under the Orphan Drug Act, the FDA may grant orphan drug designation to drugs
intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the United States. Orphan drug designation must be requested before submitting an NDA or BLA for that orphan
indication. After the FDA grants orphan drug designation, the generic identity of the drug and its potential orphan use are disclosed publicly by the FDA. Orphan drug designation does not convey any advantage in or shorten the duration of the
regulatory review and approval process. If a product that has orphan drug designation is the first to subsequently receive FDA approval for the disease for which it has such designation, the product is entitled to orphan drug exclusivity for seven
years in the United States (i.e., the FDA may not approve any other applications to market the same drug for the same disease for seven years, except in very limited circumstances). The EMA has granted Orphan drug designation for Esbriet and
therefore we currently expect to have 10 years of market exclusivity as a result of this designation in the European Union. We have filed and intend to file for orphan drug designation for those diseases we target that meet the criteria for orphan
drug exclusivity. For example, Actimmune has orphan drug exclusivity for severe, malignant osteopetrosis. Actimmune and pirfenidone have been granted orphan drug designation for the treatment of IPF by the FDA and EMA. Although obtaining FDA and EMA
approval to market a product with orphan drug exclusivity can be advantageous, there can be no assurance that we will be able to maintain this designation for Actimmune or pirfenidone, nor can there be any assurance that we will be granted orphan
drug designation for additional diseases or that orphan drug exclusivity will provide us with a material commercial advantage.

Research
and Development

Our research and development expenses were $67.5 million, $89.1 million and $104.2 million
for the years ended December 31, 2010, 2009 and 2008.

Facilities

All of our facilities and long-lived assets are located in the United States and Europe. Our facilities in the United States currently
consist of 55,898 square feet of office space located at our headquarters at 3280 Bayshore Boulevard, Brisbane, California. In December 2000, we entered into a ten-year lease for this facility. In July 2010, we extended the lease agreement on
our current facility for an additional term that expires in April 2016. We also maintain offices located in Reinach, Switzerland, our European headquarters and Berlin, Germany. We believe that our facilities are adequate for our current needs, and
that suitable additional or substitute space will be available in the future to replace our existing facilities, if necessary, or to accommodate expansion of our operations.



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Employees

As of March 1, 2011, we had 105 full-time employees. Of the full-time employees, 55 were engaged in research and development and 50 were engaged in general and administrative positions. We
believe that we have good relationships with our employees.

Available Information

We file electronically with the United States Securities and Exchange Commission (SEC) our annual reports on Form 10-K,
quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the Exchange Act). We
make available on our website at http://www.intermune.com, free of charge, copies of these reports as soon as reasonably practicable after filing these reports with, or furnishing them to, the SEC. You can also request copies of such documents by
contacting our Investor Relations department at (415) 466-2242 or by sending an e-mail to ir@intermune.com.

Executive Officers
of the Registrant

The following table provides information regarding our executive officers and key employees as of
March 1, 2011:



|                                    |  |     |    |  |       |                                                                                                                     
|----------------------------------- |  | --- | -- |  | ----- | --------------------------------------------------------------------------------------------------------------------
|Name                                |  | Age |    |  | Title
|Daniel G. Welch                     |  |     | 53 |  |       | Chairman, Chief Executive Officer and President                                                                     
|Marianne A. Porter, Ph.D.           |  |     | 56 |  |       | Senior Vice President, Chief Regulatory and Drug Safety Officer                                                     
|Williamson Z. Bradford, M.D., Ph.D. |  |     | 49 |  |       | Senior Vice President, Clinical Science and Biometrics                                                              
|Alan H. Cohen, M.D.                 |  |     | 50 |  |       | Senior Vice President, Medical Affairs                                                                              
|Giacomo Di Nepi                     |  |     | 57 |  |       | Senior Vice President and Managing Director, Europe                                                                 
|John C. Hodgman                     |  |     | 56 |  |       | Senior Vice President of Finance and Chief Financial Officer                                                        
|Steven B. Porter, M.D., Ph.D.       |  |     | 54 |  |       | Chief Medical Officer and Senior Vice President, Clinical Affairs                                                   
|Scott Seiwert, Ph.D.                |  |     | 44 |  |       | Senior Vice President, Research and Technical Development                                                           
|Howard A. Simon, Esq., SPHR         |  |     | 52 |  |       | Senior Vice President, Human Resources and Corporate Services Chief Compliance Officer and Associate General Counsel
|Robin J. Steele, Esq.               |  |     | 55 |  |       | Senior Vice President, General Counsel and Corporate Secretary                                                      

Daniel G. Welch. Mr. Welch has served as our Chairman, Chief Executive Officer and President since May 2008. Prior to that, Mr. Welch served as our Chief Executive Officer and
President and a member of our board of directors since September 2003. From March 2003 to September 2003, Mr. Welch served as a consultant to Warburg Pincus LLC, a global equity investor. From August 2002 to January 2003, Mr. Welch served
as chairman and chief executive officer of Triangle Pharmaceuticals, Inc., a pharmaceutical company. From October 2000 to June 2002, Mr. Welch served as president of the pharmaceutical division of Elan Corporation, PLC, a pharmaceutical
company. From September 1987 to August 2000, Mr. Welch served in various senior management roles at Sanofi-Synthelabo and its predecessor companies Sanofi and Sterling Winthrop, including vice president of worldwide marketing. From November
1980 to September 1987, Mr. Welch was with American Critical Care, a division of American Hospital Supply. He currently serves on the Board of Directors of one public company, Seattle Genetics, Inc. and is also a director of one private
company. Mr. Welch holds a B.S. from the University of Miami and an MBA from the University of North Carolina.

Marianne A. Porter, Ph.D. Dr. Porter has served as our Senior Vice President, Chief Regulatory and Drug Safety
Officer since January 2006. From January 2004 to January 2006, Dr. Porter served as our Senior Vice President, Regulatory/Medical Affairs and Drug Safety. From April 2002 to January 2004, Dr. Porter served as our Senior Vice President of
Global Regulatory Operations and Corporate Compliance. From December 1999 to April 2002, Dr. Porter served as senior director of clinical development/regulatory affairs at Genentech, Inc., a pharmaceutical company. From July 1998 to November
1999, Dr. Porter served as senior director of clinical development at PathoGenesis Corporation, a pharmaceutical company. From May 1995 to July 1998, Dr. Porter served as department head of clinical affairs for Amgen Inc., a pharmaceutical
company. From January 1981 to April 1995, Dr. Porter held management positions in clinical development at Alcon Laboratories, Solvay Pharmaceuticals and Parke-Davis/Warner Lambert, each a pharmaceutical company, and was a regional sales
representative at American McGaw, a division of American Hospital Supply. Dr. Porter holds a Ph.D. and M.S. from Florida State University.

Williamson Z. Bradford, M.D, Ph.D. Dr. Bradford has served as our Senior Vice President, Clinical Science and Biometrics since January 2008. From July 2001 to January 2008,
Dr. Bradford held several positions including most recently Vice President of Clinical Science, responsible for our pulmonary development efforts. From 1999-2001, Dr. Bradford served as Director, Clinical Science at IntraBiotics
Pharmaceuticals, Inc., a pharmaceutical company, and from 1998-1999, Dr. Bradford served as Clinical Scientist at



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Genentech, Inc., a pharmaceutical company. Prior to 1998, Dr. Bradford held various academic and clinical positions including Assistant Professor of Medicine at the University of California,
San Francisco (UCSF). Dr. Bradford holds an M.D. from the University of North Carolina at Chapel Hill, School of Medicine, a Ph.D. from the University of California, Berkeley, School of Public Health, and was trained in internal medicine
and infectious diseases at UCSF. He is board-certified in infectious diseases and serves as an Assistant Clinical Professor of Medicine in the Division of Infectious Diseases at UCSF.

Alan H. Cohen, M.D. Dr. Cohen has served as Senior Vice President, Medical Affairs at InterMune since November 2009. Prior to
joining InterMune, Dr. Cohen served as Vice President of Clinical Development and Medical Affairs at MAP Pharmaceuticals, overseeing clinical development programs for that companys respiratory franchise, as well as new product planning
for inhalation devices and aerosol reformulations. From 2006 to 2008, he served as Chief Medical Officer and Vice President of Global Medical Affairs, Safety & Pharmacovigilance at Jazz Pharmaceuticals, supporting orphan drugs in the areas
of sleep medicine, inborn errors of metabolism, toxicology and CNS disorders. From 2001 to 2005 he served as Senior Director of Medical Affairs at MedImmune, Inc., where he was involved in drug discovery, monoclonal antibodies against respiratory
pathogens and influenza vaccines. Dr. Cohen is a board-certified pediatric pulmonologist and currently holds an appointment as an adjunct clinical faculty member at the Stanford University School of Medicine. Dr. Cohen is a member of the
Clinical Advisory Board of Aridis, Inc. and a Board Member of SJ Pharmaceuticals, LLC.

Giacomo Di Nepi. Giacomo Di
Nepi has served as InterMunes Senior Vice President and Managing Director, Europe since October 2009. Previously, he served as a consultant to InterMune on European commercial strategy. From 2006 to 2008, Mr. Di Nepi was CEO of Takeda
Pharmaceuticals, Europe, based in London, with responsibility for Takedas European business, its geographic expansion and the setup of its newly formed European Headquarters. Between 1996 and 2006, he was with Novartis in Europe and the United
States, most recently in Switzerland as Global Head of the Transplantation, Immunology and Infectious Diseases Business Unit, with direct responsibility from Development to Sales. He previously served as CEO of Novartis Italy and in Marketing and
Sales roles in the U.S. subsidiary. From 1980 to 1996, Mr. Di Nepi was a Partner with McKinsey & Co. and was responsible for the Italian and a Core Member of the Global Pharmaceutical Practice. He served as Vice President of
Farmindustria, the Italian Industry Association, and a member of the EFPIA Heads of Europe Committee. Mr. Di Nepi holds a degree in Economics from Bocconi University, Milan, Italy and an MBA from INSEAD, Fontainebleau, France.

John C. Hodgman. Mr. Hodgman has served as our Senior Vice President of Finance and Chief Financial Officer since August
2006. Prior to joining InterMune, Mr. Hodgman served as President and Chief Executive Officer of Aerogen, Inc. from June 2005 to October 2005 until its acquisition by Nektar. From August 1998 to December 2005, he served as Chairman, President
and Chief Executive Officer of Cygnus, Inc. Mr. Hodgman also served as Vice President of Finance, Chief Financial Officer of Cygnus from August 1994 to August 1998 in addition to serving as President of Cygnus Diagnostic Division. He
currently serves on the Board of Directors of two public companies, Immersion Corporation and AVI BioPharma, Inc. Mr. Hodgman holds a B.S. from Brigham Young University and an M.B.A. from the University of Utah.

Steven B. Porter, M.D., Ph.D. Dr. Porter has served as our Chief Medical Officer and Senior Vice President,
Clinical Affairs since January 2006. Dr. Porter served as our Senior Vice President of Clinical Affairs from January 2004 to January 2006. From July 2001 to January 2004, Dr. Porter served as our Vice President of Clinical Research. From
1999 to June 2001, Dr. Porter was employed at IntraBiotics Pharmaceuticals, Inc., a pharmaceutical company, most recently as Senior Director, Clinical Science and Clinical Affairs. From 1997 to 1999, Dr. Porter served as Senior Director,
Clinical Affairs at Shaman Pharmaceuticals, Inc., a pharmaceutical company and from 1996 to 1997, Dr. Porter served as Associate Director, Clinical Research at Bayer Corporation. Dr. Porter received his M.D., and Ph.D. from Vanderbilt
University School of Medicine. He completed his residency in internal medicine at the University of California, San Francisco and his fellowship in infectious diseases at the University of California, San Francisco and Stanford University.

Scott Seiwert, Ph.D. Dr. Seiwert has served as our Senior Vice President, Research and Technical Development
since January 2010 and additionally serves as Chairman of the Roche-InterMune Joint Research Committee. Dr. Seiwert served as our Vice President, Research from 2005 to December 2009. He joined InterMune in 2003 as Senior Director of Research.
Dr. Seiwert began his career in biotechnology with a research internship in the laboratory of Dr. David Goeddel at Genentech, Inc. in 1986. He then served as Associate Director and Director of Research at Ribozyme Pharmaceuticals, Inc.
(now Merck and Co.) from 1999 to 2003. Dr. Seiwert holds a Ph.D. in Molecular Biophysics and Biochemistry from the Yale School of Medicine and received a B.S. degree in Biochemistry and Molecular Biology from the University of California at
Santa Cruz. Dr. Seiwert is a former Helen Hay Whitney Research Fellow and an independent investigator at the University of Colorado at Boulder. Professional awards include the Pharmacia/Science Prize for Young Scientists and the Kenneth Thimann
Prize in Natural Sciences. Dr. Seiwert serves on National



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Institutes of Health grant review panels, is a member of the HCV Drug Resistance Advisory Group and is an ad hoc reviewer for several scientific journals.

Howard A. Simon, Esq, SPHR. Mr. Simon has served as our Senior Vice President, Human Resources and Corporate
Services and Associate General Counsel since May 2004. Mr. Simon joined us from ABD Insurance and Financial Services, a financial services firm, where he was Senior Vice President, Human Resources & Associate Counsel from June 2003 to
March 2004. Prior to ABD, Mr. Simon was the principal in HR & Employment Law Solutions, a consulting firm specializing in the biotechnology industry from February 2002 to June 2003. He served as Vice President, Human Resources at
Maxygen, Inc. from 1999 to 2001. He holds an undergraduate degree from UC Berkeley, a law degree from the Boalt Hall School of Law (UC Berkeley), and a Masters Degree from the Graduate Theological Union of Berkeley. Mr. Simon also is
a certificated Senior Human Resources Professional.

Robin J. Steele, Esq. Ms. Steele has served as our
Senior Vice President, General Counsel and Corporate Secretary since May 2004. From 1998 to April 2003, Ms. Steele worked with Elan Pharmaceuticals, Inc., a global pharmaceutical company headquartered in Dublin, Ireland, most recently as Vice
President, Commercial and Legal Affairs in San Diego. Prior to joining Elan, Ms. Steele was in private practice and served as outside counsel to a variety of life science and technology based companies in the Bay Area. Ms. Steele
holds a B.A. in Biology from University of Colorado, Boulder, a J.D. from Hastings College of the Law, University of California, San Francisco, and a L.L.M. in Taxation from New York University School of Law.

ITEM 1A.RISK FACTORS

An investment in our common stock is risky. Stockholders and potential purchasers of shares of our stock should carefully consider the
following risk factors, which hereby update those risks contained in the Risk Factors section of our Quarterly Report on Form 10-Q that was filed with the SEC on November 8, 2010, in addition to other information and risk
factors in this Report. We are identifying these risk factors as important factors that could cause our actual results to differ materially from those contained in any written or oral forward-looking statements made by or on behalf of InterMune. We
are relying upon the safe harbor for all forward-looking statements in this Report, and any such statements made by or on behalf of InterMune are qualified by reference to the following cautionary statements, as well as to those set forth elsewhere
in this Report.

Risks Related to Our Dependence on Pirfenidone

As a result of our sale of our development and commercialization rights to danoprevir to Roche, we are dependent on the success of
pirfenidone for the treatment of IPF, which only just recently received marketing authorization in the European Union and which may never receive regulatory approval in the United States.

We commenced operations in 1998 and have incurred significant losses to date. Our revenue has been limited primarily to sales of Actimmune
derived from physicians prescriptions for the off-label use of Actimmune in the treatment of IPF and from upfront license fees and milestone payments in connection with our collaboration with Roche. In March 2007, we discontinued our
development of Actimmune for treatment of IPF. In October 2010, we sold to Roche all of our worldwide development and commercialization rights to danoprevir for $175.0 million in cash, and terminated our collaboration with Roche from which we had
derived our collaboration revenue. As a result, our future success is currently dependent on the success of pirfenidone for the treatment of IPF. In March 2011, pirfenidone was granted marketing authorization for commercial use in the European Union
for the treatment in adults of mild to moderate IPF; however, pirfenidone is still under investigation for the treatment of IPF in the United States and has not been approved by the United States Food and Drug Administration (the FDA).
Because we do not currently have another product candidate in clinical development, our future success is dependent on building a commercial operation in Europe to successfully commercialize pirfenidone in the European Union, obtaining regulatory
approval from the FDA for the use of pirfenidone for the treatment of IPF in the U.S. and, if approved by the FDA, successfully commercializing pirfenidone in the United States.

If we do not successfully commercialize pirfenidone in the European Union and/or receive regulatory approval in the United States for
pirfenidone for the treatment of IPF, our ability to commercialize a new product or generate additional revenue will be seriously harmed. We may not succeed in our commercial efforts in the European Union, or, if approved by the FDA, in the United
States, or we may never receive regulatory approval in the United States for pirfenidone, any of these will have a material adverse effect on our business and prospects. In the near term, we may experience delays in the launch of pirfenidone in one
or more of the European



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Member states, which could negatively affect our stock price. We may also experience delays in regulatory approval in the United States for pirfenidone, if it is approved at all and our stock
price may be negatively affected.

We may also fail to develop our other earlier stage product candidates on schedule, or at
all, for the reasons stated in Risks Related to the Development of Our Products and Product Candidates. If this were to occur, we will continue to be dependent on the successful commercialization of pirfenidone, our development costs may
increase and our ability to generate revenue could be impaired.

We intend to initiate a Phase 3 clinical study to gain
approval of pirfenidone for commercial use within the United States, the results of which may fail to demonstrate the efficacy of pirfenidone to the FDA and may have a negative effect on the commercialization of pirfenidone in the European Union.

We are currently evaluating our clinical development options to gain approval of pirfenidone for commercial use within
the United States and have plans to begin a new Phase 3 clinical study in the first half of 2011. The results of this Phase 3 clinical trial may not be satisfactory to the FDA to receive regulatory approval. If the results of the Phase 3 clinical
trial are not satisfactory to gain FDA regulatory approval, sales of Esbriet in the European Union may suffer. Additionally, as in any clinical trial, discovery of unknown problems with pirfenidone could negatively impact the approved safety and
efficacy profile and result in possible reduced sales or product withdrawal in the European Union. Because of our dependence on the commercial success of pirfenidone, a negative outcome in the Phase 3 clinical study or negative regulatory outcome by
the FDA could materially and adversely affect our business and prospects. For additional risks related to clinical studies and government regulations, see the risks under Risks Related to the Government Regulation and Approval of Our Products
and Product Candidates.

Risks Related to the Development of Our Products and Product Candidates

Drug development is a long, expensive and uncertain process, and delay or failure can occur at any stage of any of our clinical
trials.

To gain approval to market a product for the treatment of a specific disease, we must provide the FDA and
foreign regulatory authorities with clinical data that adequately demonstrate the safety and efficacy of that product for the intended indication applied for in the NDA or respective regulatory file. Drug development is a long, expensive and
uncertain process, and delay or failure can occur at any stage of any of our clinical trials. A number of companies in the pharmaceutical industry, including biotechnology companies, have suffered significant setbacks in clinical trials, even after
promising results in earlier preclinical or clinical trials. These setbacks have been caused by, among other things, preclinical findings made while clinical studies were underway and safety or efficacy observations made in clinical studies. Success
in preclinical testing and early clinical trials does not ensure that later clinical trials will be successful, and the results of clinical trials by other parties may not be indicative of the results in trials we may conduct. For example, we
terminated our development of Actimmune for patients with IPF as a result of our decision to discontinue the INSPIRE trial on the recommendation of the studys independent DMC. We do not intend to conduct further development of Actimmune for
the treatment of IPF. In addition, we reported that our exploratory Phase 2 clinical trial evaluating Actimmune for the potential treatment of advanced liver fibrosis caused by HCV in patients who have failed standard antiviral therapy failed to
meet its primary endpoint. As a result, we do not intend to conduct further development of Actimmune for the treatment of liver fibrosis. For specific risks related to the pirfenidone development program, please see the risk factor titled If
our clinical trials fail to demonstrate to the FDA and foreign regulatory authorities that any of our products or product candidates are safe and effective for the treatment of particular diseases, the FDA and foreign regulatory authorities may
require us to conduct additional clinical trials or may not grant us marketing approval for such products or product candidates for those diseases below.

We do not know whether our planned clinical trials will begin on time, or at all, or will be completed on schedule, or at all.

The commencement or completion of any of our clinical trials may be delayed, halted, or discontinued for numerous reasons, including, but
not limited to, the following:



| |  |  | the FDA or other regulatory authorities do not approve a clinical trial protocol or place a clinical trial on clinical hold;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------



| |  |  | patients do not enroll in clinical trials at the rate we expect;
| | - |  | ----------------------------------------------------------------



| |  |  | patients experience adverse side effects or unsafe toxicity levels;
| | - |  | -------------------------------------------------------------------



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| |  |  | patients withdraw or die during a clinical trial for a variety of reasons, including adverse events associated with the advanced stage of their disease
and medical problems that may or may not be related to our products or product candidates;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the interim results of the clinical trial are inconclusive or negative;
| | - |  | -----------------------------------------------------------------------



| |  |  | our trial design, although approved, is inadequate to demonstrate safety and/or efficacy;
| | - |  | -----------------------------------------------------------------------------------------



| |  |  | third-party clinical investigators do not perform our clinical trials on our anticipated schedule or consistent with the clinical trial protocol and
good clinical practices or other third-party organizations do not perform data collection and analysis in a timely or accurate manner;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our contract laboratories fail to follow good laboratory practices; or
| | - |  | ----------------------------------------------------------------------



| |  |  | sufficient quantities of the trial drug are not available.
| | - |  | ----------------------------------------------------------

Our development costs will increase if we have material delays in our clinical trials or if we need to perform more or larger clinical trials than planned. If there are any significant delays for any of
our other current or planned clinical trials, our business, financial condition, financial results and the commercial prospects for our products and product candidates will be harmed, and our prospects for profitability will be impaired.

In addition, delays or discontinuations of our clinical trials could require us to cease development efforts of a product candidate in
part or altogether, which will harm our business or financial condition and the commercial prospects for such product and product candidate.

We currently depend upon one collaboration partner, Roche, for support in our HCV research programs. If our relationship with Roche ends, our business and, in particular, the development and
commercialization of our HCV protease inhibitor program could be significantly harmed.

We have historically depended
upon one collaboration partner, Roche, for support in the development and commercialization of our HCV protease inhibitor program. In connection with our divestiture of danoprevir, we terminated our Collaboration Agreement with Roche. In December
2010, we entered into a new collaboration agreement with Roche to identify, develop and commercialize novel second-generation HCV protease inhibitors. If our collaboration relationship with Roche terminates and we are unable to enter into another
similar arrangement with other collaborators for such other HCV research programs, our development and commercialization of our HCV research program could be materially adversely affected.

Preclinical development is a long, expensive and uncertain process, and we may terminate one or more of our current preclinical
development programs.

We may determine that certain preclinical product candidates or programs do not have sufficient
potential to warrant the allocation of resources toward them. Accordingly, we may elect to terminate our programs for and, in certain cases, our licenses to, such product candidates or programs. If we terminate a preclinical program in which we have
invested significant resources, we will have expended resources on a program that will not provide a full return on our investment and missed the opportunity to have allocated those resources to potentially more productive uses.

Risks Related to Government Regulation and Approval of our Products and Product Candidates

If our clinical trials fail to demonstrate to the FDA and foreign regulatory authorities that any of our products or product
candidates are safe and effective for the treatment of particular diseases, the FDA and foreign regulatory authorities may require us to conduct additional clinical trials or may not grant us marketing approval for such products or product
candidates for those diseases.

We are not permitted to market our product candidates in the United States until we
receive approval of an NDA from the FDA, or in any foreign countries until we receive the requisite approval from such countries. Before obtaining regulatory approvals for the commercial sale of any product candidate for a target indication, we must
demonstrate with evidence gathered in preclinical and well-controlled clinical trials, and, with respect to approval in the United States, to the satisfaction of the FDA and, with respect to approval in other countries, similar regulatory
authorities in those countries, that the product candidate is safe and effective for use for that



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target indication and that the manufacturing facilities, processes and controls are adequate. Our failure to adequately demonstrate the safety and effectiveness of any of our products or product
candidates for the treatment of particular diseases may delay or prevent our receipt of the FDAs and foreign regulatory authorities approval and, ultimately, may prevent commercialization of our products and product candidates for those
diseases. The FDA and foreign regulatory authorities have substantial discretion in deciding whether, based on the benefits and risks in a particular disease, any of our products or product candidates should be granted approval for the treatment of
that particular disease. Even if we believe that a clinical trial or trials has demonstrated the safety and statistically significant efficacy of any of our products or product candidates for the treatment of a disease, the results may not be
satisfactory to the FDA or foreign regulatory authorities. Preclinical and clinical data can be interpreted by the FDA and foreign regulatory authorities, including their advisory committees, in different ways, which could delay, limit or prevent
regulatory approval. In addition, even if advisory committees to the FDA recommend approval of our product candidates, such recommendations are non-binding and the FDA may not approve our NDA for the product candidates. For example, nine of the
twelve members of the Pulmonary-Allergy Drugs Advisory Committee, or PADAC, of the FDA recommended approval of pirfenidone to reduce decline in lung function in patients with IPF. However, notwithstanding the PADAC approval recommendation, we
subsequently received a Complete Response Letter from the FDA requesting an additional clinical trial to support the efficacy of pirfenidone.

Our CAPACITY trials were conducted without a Special Protocol Assessment (SPA) with the FDA. The FDAs SPA process creates a written agreement between the sponsoring company and the FDA regarding
clinical study design and other clinical study issues that can be used to support approval of a product candidate. We did not obtain an SPA agreement with the FDA and therefore there was no assurance that the results would provide a sufficient basis
in the view of the FDA for the FDA to grant regulatory approval of a new drug application for pirfenidone for the treatment of IPF. In addition, while the FDA will consider and approve NDAs based on various endpoints, the FDA had indicated that
mortality is the ideal endpoint for IPF clinical trials. We designed and conducted CAPACITY 1 and CAPACITY 2 based on FVC change as the primary endpoint, as opposed to mortality. The FDA had advised us that they were uncertain as to what would
constitute a clinically meaningful treatment effect of pirfenidone on this endpoint and reviewed the effect of pirfenidone not only based on FVC change but also based on the totality of the data, including the effect of pirfenidone on all of the
specified efficacy endpoints as well as the safety data to help determine the risk-benefit profile of pirfenidone in IPF patients. The primary endpoint of FVC change was met with statistical significance in CAPACITY 2 but not in CAPACITY 1.
Therefore, we did not replicate the efficacy of pirfenidone for the treatment of IPF in a second pivotal study. Moreover, because the data base for the Shionogi Phase 3 study was not included in our NDA, the FDA did not consider this study to
support the efficacy of pirfenidone. Rather the adequacy of our application to support the efficacy of pirfenidone for the treatment of IPF was determined by the FDA during the review of our NDA. While in our view the totality of the data from
CAPACITY 1 and CAPACITY 2 support the efficacy and safety of pirfenidone in IPF, the FDA disagreed with our view and decided that such data does not adequately support approval of our NDA filing and issued to us a Complete Response Letter on
May 4, 2010 requesting an additional clinical trial to support the efficacy of pirfenidone in IPF. We are currently evaluating our clinical development options to gain approval of pirfenidone for commercial use within the United States and have
plans to begin a new Phase 3 clinical study in the first half of 2011. The results of this Phase 3 clinical trial may not be satisfactory to the FDA to receive regulatory approval.

In addition, in the course of its review of an NDA, MAA or regulatory application, the FDA, EMA or other regulatory authorities may
conduct audits of the practices and procedures of a company and its suppliers and contractors concerning manufacturing, clinical study conduct, non-clinical studies and several other areas. If the FDA, EMA and/or other regulatory authorities conduct
an audit relating to an NDA, MAA or regulatory application submitted by us and finds a significant deficiency in any of these or other areas, the FDA, EMA or other regulatory authorities could delay or not approve our FDA, MAA or regulatory
application. As in the case of the FDA issuing to us a Complete Response Letter on our NDA for pirfenidone for IPF, if regulatory delays are significant or regulatory approval is limited or denied altogether, our financial results and the commercial
prospects for those of our products or product candidates involved will be harmed, and our prospects for profitability will be significantly impaired.

We are subject to extensive and rigorous governmental regulation, including the requirement of FDA or other regulatory approval before our products and product candidates may be lawfully marketed.

Both before and after the approval or our product candidates and product, we, our product candidates, our product, our
operations, our facilities, our suppliers, and our contract manufacturers, contract research organizations, and contract testing laboratories are subject to extensive regulation by governmental authorities in the United States and other countries,
with regulations differing from country to country. In the United States, the FDA regulates, among other things, the pre-clinical testing, clinical trials, manufacturing, safety, efficacy, potency, labeling, storage, record keeping, quality systems,
advertising, promotion, sale and distribution of therapeutic products. Failure to comply with applicable requirements could result in, among other things, one or more of the following actions: notices of violation, untitled letters, warning letters,
fines and other monetary penalties, unanticipated expenditures, delays in approval or refusal to approve a product candidate; product recall or seizure; interruption of manufacturing or clinical trials; operating



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restrictions; injunctions; and criminal prosecution. We or the FDA, or an institutional review board, may suspend or terminate human clinical trials at any time on various grounds, including a
finding that the subjects are being exposed to an unacceptable health risk. Any failure to receive the marketing approvals necessary to commercialize our product candidates could harm our business.

The regulatory review and approval process of governmental authorities, which includes the need to conduct nonclinical studies and
clinical trials of each product candidate, is lengthy, expensive and uncertain, and regulatory standards may change during the development of a particular product candidate. We are not permitted to market our product candidates in the United States
or other countries until we have received requisite regulatory approvals. For example, securing FDA approval requires the submission of an NDA to the FDA. The approval application must include extensive nonclinical and clinical data and supporting
information to establish the product candidates safety and effectiveness for each indication. The approval application must also include significant information regarding the chemistry, manufacturing and controls for the product. The FDA
review process typically takes significant time to complete and approval is never guaranteed. If a product is approved, the FDA may limit the indications for which the product may be marketed, require extensive warnings on the product labeling,
impose restricted distribution programs, require expedited reporting of certain adverse events, or require costly ongoing requirements for post-marketing clinical studies and surveillance or other risk management measures to monitor the safety or
efficacy of the product. Markets outside of the United States such as the EU also have requirements for approval of drug candidates with which we must comply prior to marketing. Obtaining regulatory approval for marketing of a product candidate in
one country does not ensure we will be able to obtain regulatory approval in other countries, but a failure or delay in obtaining regulatory approval in one country may have a negative effect on the regulatory process in other countries. For
example, with respect to our NDA for pirfenidone for IPF in the United States, we received a Complete Response Letter from the FDA requesting an additional clinical trial to support the efficacy of pirfenidone. Also, any regulatory approval of any
of our products or product candidates, once obtained, may be withdrawn.

The FDA has increased its attention to product safety
concerns in light of recent high profile safety issues with certain drug products, in the United States. Moreover, heightened Congressional scrutiny on the adequacy of the FDAs drug approval process and the agencys efforts to assure the
safety of marketed drugs has resulted in proposed agency initiatives and new legislation addressing drug safety issues. If adopted, any new legislation or agency initiatives could result in delays or increased costs during the period of product
development, clinical trials and regulatory review and approval, as well as increased costs to assure compliance with any new post-approval regulatory requirements. These restrictions or requirements could require us to conduct costly studies.

In addition, we, our suppliers, our operations, our facilities, our contract manufacturers, our contract research
organizations, and our contract testing laboratories are required to comply with extensive FDA requirements both before and after approval of our products. For example, we are required to report certain adverse reactions and production problems, if
any, to the FDA, and to comply with certain requirements concerning advertising and promotion for our product candidates and our products. Also, quality control and manufacturing procedures must continue to conform to current Good Manufacturing
Practices (cGMP) regulations after approval, and the FDA periodically inspects manufacturing facilities to assess compliance with cGMP. Accordingly, we and others with whom we work must continue to expend time, money, and effort in all
areas of regulatory compliance, including manufacturing, production, and quality control. In addition, discovery of safety issues may result in changes in labeling or restrictions on a product manufacturer or NDA holder, including removal of the
product from the market.

If the FDA imposes significant restrictions or requirements related to our products for any
disease, or withdraws its approval of any of our products for any disease for which it has been approved, our revenue would decline.

The FDA and foreign regulatory authorities may impose significant restrictions on the use or marketing of our products or impose additional requirements for post-approval studies. Later discovery of
previously unknown problems with any of our products or their manufacture may result in further restrictions, including withdrawal of the product from the market. In this regard, the FDA has conducted routine inspections of our manufacturing
contractors, and some were issued a standard notice of inspectional observations. While we believe that all of these observations are being appropriately corrected, failure to correct any deficiency could result in manufacturing delays.
Our existing approvals, and any new approval for any other disease that we target, if granted, could be withdrawn for failure to comply with regulatory requirements or to meet our post-approval commitments. For example, we have ongoing Phase 4
post-marketing commitments to the FDA relating to Actimmune for the treatment of osteopetrosis, including a registry and drug interaction study. The failure to adequately address these ongoing Phase 4 commitments could result in a regulatory action
or restriction, such as withdrawal of the relevant products approval by the FDA. If approval for a disease is withdrawn, we could no longer market the affected product for that disease. In addition, governmental authorities could seize our
inventory of such product, force us to recall any product already in the market, or subject us to criminal or civil penalties, if we fail to comply with FDA or other governmental regulations.



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For a description of restrictions relating to the off-label promotion of our products,
please see the risk factor titled, If we fail to comply or have in the past failed to comply with FDA or other government regulations prohibiting the promotion of off-label uses and the promotion of products for which marketing approval has
not been obtained, we could be subject to regulatory enforcement action by the FDA or other governmental authorities as well as follow-on actions filed by consumers and other end-payors, which actions could result in substantial fines, sanctions and
damage awards against us, any of which could harm our business below.

If we fail to comply or have in the past
failed to comply with FDA or other government regulations prohibiting the promotion of off-label uses and the promotion of products for which marketing approval has not been obtained, we could be subject to regulatory enforcement action by
the FDA or other governmental authorities as well as follow-on actions filed by consumers and other end-payors, which actions could result in substantial fines, sanctions and damage awards against us, any of which could harm our
business.

The FDA has authority to regulate advertising and promotional labeling for our products under the Federal
Food, Drug, and Cosmetic Act and implementing regulations. In general, that authority requires advertising and promotional labeling to be truthful and not misleading, and consistent with the information in the products approved label,
including that a product may be marketed only for the approved indications. Physicians may prescribe commercially available drugs for uses that are not described in the products labeling and that differ from those uses tested by us and
approved by the FDA. Such off-label uses are common across medical specialties. For example, even though the FDA has not approved the use of Actimmune for the treatment of IPF, we are aware that physicians are prescribing, and have prescribed in the
past, Actimmune for the treatment of IPF. Substantially all of our Actimmune revenue is derived from physicians prescriptions for off-label use for IPF. The FDA does not regulate the behavior of physicians in their choice of treatments. The
FDA and other governmental agencies do, however, restrict manufacturers communications on the subject of off-label use. Companies may not promote FDA-approved drugs for off-label uses. Accordingly, we may not promote Actimmune for the
treatment of IPF. The FDA and other governmental authorities actively enforce regulations prohibiting promotion of off-label uses. The federal government has levied large civil and criminal fines against manufacturers for alleged improper promotion,
including us in October 2006 in connection with our reaching a comprehensive settlement with the government to resolve all claims as related to our promotional activities with respect to Actimmune. The FDA has also requested that companies
enter into consent decrees or permanent injunctions under which certain promotional conduct is changed or curtailed. We are aware of many instances, including our own experience as it relates to Actimmune, in which the Office of the
Inspector General of the FDA has sought and secured criminal penalties and/or a corporate integrity agreement against pharmaceutical manufacturers requiring payment of substantial fines and monitoring of certain promotional activities to ensure
compliance with FDA regulations. We engage in medical education activities that are subject to scrutiny under the FDAs regulations relating to off-label promotion. While we believe we are currently in compliance with these regulations, the
regulations are subject to varying interpretations, which are evolving.

If the FDA or any other governmental agency initiates
an enforcement action against us and it is determined that we violated prohibitions relating to off-label promotion in connection with past or future activities, we could be subject to civil and/or criminal fines and sanctions such as those noted
above in this risk factor, any of which would have an adverse effect on our revenue, business and financial prospects. As a follow-on to such governmental enforcement actions, consumers and other end-payors of the product may initiate
action against us claiming, among other things, fraudulent misrepresentation, civil RICO, unfair competition, violation of various state consumer protection statutes, and unjust enrichment. For example, as a follow-on to the subpoena
we received from the U.S. Department of Justice with respect to our promotional and marketing activities in connection with Actimmune and the resulting settlement we reached with the government in October 2006, we have had various class
action suits filed against us by consumers and other end-payors of Actimmune. If the plaintiffs in such follow-on actions are successful, we could be subject to various damages, including compensatory damages, treble damages, punitive
damages, restitution, disgorgement, prejudgment and post-judgment interest on any monetary award, and the reimbursement of the plaintiffs legal fees and costs, any of which would also have an adverse effect on our revenue, business and
financial prospects.

In addition, some of the agreements pursuant to which we license our products, including our license
agreement relating to Actimmune, contain provisions requiring us to comply with applicable laws and regulations, including the FDAs restriction on the promotion of FDA-approved drugs for off-label uses. As a result, if it were determined that
we violated the FDAs rules relating to off-label promotion in connection with our marketing of Actimmune, we may be in material breach of our license agreement for Actimmune. If we failed to cure a material breach of this license agreement, we
could lose our rights to certain therapeutic uses for Actimmune under the agreement.



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If we fail to fulfill our obligations under the Corporate Integrity Agreement with the
Office of Inspector General of the United States Department of Health and Human Services it could have a material adverse effect on our business.

On October 26, 2006, we announced that we entered into a Corporate Integrity Agreement with the Office of the Inspector General of the United States Department of Health and Human Services. Under the
terms of the Corporate Integrity Agreement, the Office of the Inspector General of the United States Department of Health and Human Services has agreed to waive any potential exclusion against us from participation in federal health care programs
provided that we comply with the terms of the Corporate Integrity Agreement for a period of five years ending October 25, 2011. Effective October 29, 2010, the Office of the Inspector General of the United States Department of Health and
Human Services agreed to suspend further enforcement of the Corporate Integrity Agreement. However, should we engage in any US marketing activities (other than with regard to sales of Actimmune® for its on-label indications of chronic granulomatous disease and severe malignant osteopetrosis), the Office of the Inspector General of the United States Department
of Health and Human Services shall have the right, upon written notice to InterMune, to cancel the suspension and reinstatement enforcement of the Corporate Integrity Agreement through its expiration date of October 26, 2011. If the enforcement
of the Corporate Integrity Agreement is reinstated and we do not satisfy our obligations under the Corporate Integrity Agreement, the Office of the Inspector General of the United States Department of Health and Human Services could potentially
exclude us from participation in federal health care programs, which could have significant adverse effects on our operations and financial results. We may be required to indemnify certain of our former officers and directors if any action is taken
by the U.S. Attorney or other authorities with respect to those individuals in connection with the off-label promotion of Actimmune for use with IPF, and there can be no assurance that our directors and officers liability insurance
will cover all of these indemnification obligations.

The pricing and profitability of our products may be subject to
control by the government and other third-party payors.

The continuing efforts of governmental and other third-party
payors to contain or reduce the cost of healthcare through various means may adversely affect our ability to successfully commercialize our products. In many foreign markets, the pricing and/or profitability of prescription pharmaceuticals are
subject to governmental control. In the United States, we expect that there will continue to be federal and state proposals to implement similar governmental controls, such as the omnibus healthcare reform legislation recently adopted by the U.S.
government. Although we cannot predict the full effects on our business of the implementation of the healthcare reform bill, it is possible that this legislation or other similar legislation will result in decreased reimbursement for prescription
drugs, which may further exacerbate industry-wide pressure to reduce the prices charged for prescription drugs. In addition, increasing emphasis on managed care in the United States will continue to put pressure on the pricing of pharmaceutical
products. These new and any future cost-control initiatives could decrease the price that we would receive for Actimmune or any other products that we may develop in the future, which would reduce our revenue and potential profitability.

Our failure or alleged failure to comply with anti-kickback and false claims laws could result in civil and/or criminal sanctions
and/or harm our business.

We are subject to various federal and state laws pertaining to health care fraud and
abuse including anti-kickback laws and false claims laws. Subject to certain exceptions, the anti-kickback laws make it illegal for a prescription drug manufacturer to knowingly and willfully solicit, offer, receive or pay any remuneration in
exchange for, or to induce, the referral of business, including the purchase or prescription of a particular drug. The federal government has published regulations that identify safe harbors or exemptions for certain payment arrangements
that do not violate the anti-kickback statutes. Due to the breadth of the statutory provisions and the absence of guidance in the form of regulations or court decisions addressing some of our practices, it is possible that our practices might be
challenged under anti-kickback or similar laws. False claims laws prohibit anyone from knowingly presenting, or causing to be presented, for payment to third party payors (including Medicare and Medicaid) claims for reimbursed drugs or services that
are false or fraudulent, claims for items or services not provided as claimed or claims for medically unnecessary items or services. Our activities relating to the reporting of wholesaler or estimated retail prices for our products, the reporting of
Medicaid rebate information and other information affecting federal and state and third-party payment for our products, and the sale and marketing of our products, could become subject to scrutiny under these laws.

In addition, pharmaceutical companies have been prosecuted under the False Claims Act in connection with their off-label
promotion of drugs. For information regarding allegations with respect to off-label promotion by us, please see the risk factor titled If we fail to comply or have in the past failed to comply with FDA or other government
regulations prohibiting the promotion of off-label uses and the promotion of products for which marketing approval has not been obtained, we could be subject to regulatory enforcement action by the FDA or other governmental authorities as well as
follow-on actions filed by consumers and other end-payors, which actions could result in substantial fines, sanctions and damage awards against us, any of which could harm our business above.



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If the government were to allege that we were, or convict us of, violating these laws, there
could be a material adverse effect on us, including a substantial fine, decline in our stock price, or both. Our activities could be subject to challenge for the reasons discussed above and due to the broad scope of these laws and the increasing
attention being given to them by law enforcement authorities.

Risks Related to Manufacturing and Our Dependence on Third Parties

The manufacturing and manufacturing development of our products and product candidates present technological,
logistical and regulatory risks, each of which may adversely affect our potential revenue.

The manufacturing and
manufacturing development of pharmaceuticals, and, in particular, biologicals, are technologically and logistically complex and heavily regulated by the FDA and other governmental authorities. The manufacturing and manufacturing development of our
products and product candidates present many risks, including, but not limited to, the following:



| |  |  | It may not be technically feasible to scale up an existing manufacturing process to meet demand or such scale-up may take longer than
anticipated; and
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Failure to comply with strictly enforced good manufacturing practices regulations and similar foreign standards may result in delays in product
approval or withdrawal of an approved product from the market. For example, the FDA has conducted routine inspections of our manufacturing contractors, and some were issued a standard notice of observations. Failure to correct any
deficiency could result in manufacturing delays.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Any of these factors could delay clinical trials,
regulatory submissions and/or commercialization of our products for particular diseases, interfere with current sales, entail higher costs and result in our being unable to effectively sell our products.

Our manufacturing strategy, which relies on third-party manufacturers, exposes us to additional risks as a result of which we may
lose potential revenue.

We do not have the resources, facilities or experience to manufacture any of our products or
product candidates ourselves. Completion of our clinical trials and commercialization of our products requires access to, or development of, manufacturing facilities that meet FDA standards to manufacture a sufficient supply of our products. The FDA
must approve facilities that manufacture our products for commercial purposes, as well as the manufacturing processes and specifications for the product. We depend on third parties for the manufacture of our product candidates for preclinical and
clinical purposes, and we rely on third parties with FDA- approved manufacturing facilities for the manufacture of Actimmune for commercial purposes. We have a long-term supply contract with Boehringer Ingelheim Austria GmbH (BI) for
Actimmune, a long-term supply contract with Signa C.V. and ACIC Fine Chemicals Inc. for pirfenidone active pharmaceutical ingredient and a contract with Catalent for the manufacture of the drug product for pirfenidone. However, if we do not perform
our obligations under these agreements, these agreements may be terminated.

Our manufacturing strategy for our products and
product candidates presents many risks, including, but not limited to, the following:



| |  |  | If market demand for our products is less than our purchase obligations to our manufacturers, we may incur substantial penalties and substantial
inventory write-offs.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Manufacturers of our products are subject to ongoing periodic inspections by the FDA and other regulatory authorities for compliance with strictly
enforced good manufacturing practices regulations and similar foreign standards, and we do not have control over our third-party manufacturers compliance with these regulations and standards.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | When we need to change third party manufacturers of a particular pharmaceutical product, the FDA and foreign regulatory authorities must approve the
new manufacturers facilities and processes prior to our use or sale of products it manufactures for us. This requires demonstrated compatibility of product, process and testing and compliance inspections. Delays in transferring manufacturing
technology between third parties could delay clinical trials, regulatory submissions and commercialization of our product candidates.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Our manufacturers might not be able or may refuse to fulfill our commercial or clinical trial needs, which would require us to seek new manufacturing
arrangements and may result in substantial delays in meeting market or clinical trial demands. For
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| | example, our current agreement with BI does not impose any obligation on BI to reserve a minimum annual capacity for the production of Actimmune, which could impair our ability to obtain product
from them in a timely fashion.
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | We may not have intellectual property rights, or may have to share intellectual property rights, to any improvements in the manufacturing processes or
new manufacturing processes for our products.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Our product costs may increase if our manufacturers pass their increasing costs of manufacture on to us.
| | - |  | --------------------------------------------------------------------------------------------------------



| |  |  | If third-party manufacturers do not successfully carry out their contractual duties or meet expected deadlines, we may not be able to obtain or
maintain regulatory approvals for our products and product candidates and may not be able to successfully commercialize our products and product candidates. In such event, we may not be able to locate any necessary acceptable replacement
manufacturers or enter into favorable agreements with such replacement manufacturers in a timely manner, if at all.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | If our agreement with a third-party manufacturer expires, we may not be able to renegotiate a new agreement with that manufacturer on favorable terms,
if at all. If we cannot successfully complete such renegotiation, we may not be able to locate any necessary acceptable replacement manufacturers or enter into favorable agreements with such replacement manufacturers in a timely manner, if at all.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Any of these factors could delay clinical trials, regulatory submissions or commercialization of our
products for particular diseases, interfere with current sales, entail higher costs and result in our being unable to effectively sell our products.

We rely on third parties to conduct clinical trials for our products and product candidates, and those third parties may not perform satisfactorily.

If our third-party contractors do not successfully carry out their contractual duties or meet expected deadlines, we may be delayed in or
prevented from obtaining regulatory approvals for our products and product candidates, and may not be able to successfully commercialize our products and product candidates for targeted diseases. We do not have the ability to independently conduct
clinical trials for all of our products and product candidates, and we rely on third parties such as contract research organizations, medical institutions and clinical investigators to perform this function. Our ability to monitor and audit the
performance of these third parties is limited. If these third parties do not perform satisfactorily, our clinical trials may be extended or delayed, resulting in potentially substantial cost increases to us and other adverse impacts on our product
development efforts. We may not be able to locate any necessary acceptable replacements or enter into favorable agreements with them, if at all.

Risks Related to the Commercialization of Our Products and Product Candidates

Expansion of our commercial infrastructure in the European Union is a significant undertaking that requires substantial financial and managerial resources, and we may not be successful in our
efforts. We may also encounter unexpected or unforeseen delays in establishing a commercial infrastructure in the European Union, which may negatively impact our ability to launch our commercial efforts for Esbriet and the timing of such launch.

In March 2011, the European Commission granted marketing authorization for Esbriet (pirfenidone) in adults for the
treatment of mild to moderate IPF. The approval authorizes marketing of Esbriet in all 27 European Union member states. Based on anticipated European Union member country reimbursement timelines, we currently plan to launch Esbriet in the so-called
Top 5 EU countries as follows: Germany in September of 2011; France, Spain and Italy in the first half of 2012 and in the United Kingdom in mid-2012. We also plan to launch Esbriet in all or substantially all of the 10 most important
pharmaceutical markets in the European Union by approximately mid-2012. A commercial launch of this size is a significant undertaking that requires substantial financial and managerial resources. To support our anticipated marketing efforts in
Europe, we are currently working to expand our commercial infrastructure within the European Union, including an increase to our employee headcount in that region and we recently announced the establishment of our European headquarters in Reinach,
Switzerland. Further, in December 2010, we transferred all of our non-U.S. rights to research, develop and commercialize pirfenidone for IPF to our wholly-owned Swiss subsidiary, InterMune International AG. However, in order to successfully launch
our commercial operations, we will need to expand the number of our managerial, operational, financial and other employees in the European Union, which will require additional financial resources and divert managements attention. We may not be
successful in establishing a commercial operation in the European Union (including, but not limited to, failing to attract, retain and motivate the necessary skilled personnel and failing to develop a successful marketing



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strategy), the effect of which will have a negative outcome on our ability to commercialize Esbriet and generate revenue from the sale of Esbriet.

Additionally, we may encounter unexpected or unforeseen delays in establishing our commercial operations that delay the launch of our
commercial operations in one or more European Union member states. These delays may increase the cost of and the resources required for successful commercialization of Esbriet in the European Union. Given our limited commercial history, we do not
have significant experience in a commercial launch of this size.

Even if regulatory authorities approve our products or
product candidates for the treatment of the diseases that we are targeting, our products may not be marketed or commercially successful.

Our products and product candidates are expensive, and we anticipate that the annual cost of treatment for the diseases for which we are seeking approval will be significant. These costs will vary for
different diseases based on the dosage and method of administration. Accordingly, we may decide not to market any of our products or product candidates for an approved disease because we believe that it may not be commercially successful. Market
acceptance of and demand for our products and product candidates, including Esbriet in the European Union, will depend on many factors, including, but not limited to:



| |  |  | cost of treatment;
| | - |  | ------------------



| |  |  | pricing and availability of alternative products;
| | - |  | -------------------------------------------------



| |  |  | ability to obtain third-party coverage or reimbursement for our products or product candidates to treat a particular disease;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------



| |  |  | perceived efficacy relative to other available therapies;
| | - |  | ---------------------------------------------------------



| |  |  | shifts in the medical community to new treatment paradigms or standards of care;
| | - |  | --------------------------------------------------------------------------------



| |  |  | relative convenience and ease of administration; and
| | - |  | ----------------------------------------------------



| |  |  | prevalence and severity of adverse side effects associated with treatment.
| | - |  | --------------------------------------------------------------------------

If third-party payors do not provide coverage or reimburse patients for our products, our revenue and prospects for profitability
will suffer.

Our ability to commercialize our products or product candidates for particular diseases is highly
dependent on the extent to which coverage and reimbursement for our products is available from:



| |  |  | private health insurers, including managed care organizations;
| | - |  | --------------------------------------------------------------



| |  |  | governmental payors, such as Medicaid, the U.S. Public Health Service Agency or the Veterans Administration; and
| | - |  | -----------------------------------------------------------------------------------------------------------------



| |  |  | other third-party payors.
| | - |  | -------------------------

Significant uncertainty exists as to the coverage and reimbursement status of pharmaceutical products, particularly with respect to products that are prescribed by physicians for off-label use. If
governmental and other third-party payors do not provide adequate coverage and reimbursement levels for our products, market acceptance of our products will be reduced, and our sales will suffer. Many third-party payors provide coverage or
reimbursement only for FDA-approved indications. If any large or many third-party payors decide to deny reimbursement for Actimmune used to treat IPF, sales of Actimmune would decline, and our revenue would suffer.

Often, third-party payors make the decision to reimburse an off-label prescription based on whether that product has a compendia listing.
A drug compendia is produced by a compendia body, such as the United States Pharmacopoeia Drug Information, that lists approved indications that a product has received from the FDA. The compendia bodies also evaluate all of the clinical evidence to
determine whether an off-label use of a product should be listed in the compendia as medically appropriate. A compendia listing of an off-label use is a condition typically required by third-party payors, such as Medicare and private payors, to
cover that use. Applications for a compendia listing are often based upon the publication of certain data in peer reviewed journals whose publication



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is often outside the applicants control. We are not seeking to achieve acceptance by a compendia body for Actimmune for the treatment of IPF. As a result, additional third-party payors may
decide to deny reimbursement for Actimmune for the treatment of IPF and fewer physicians may prescribe Actimmune for such treatment. If either of these were to occur, sales of Actimmune would decline and our revenue would suffer.

Some third-party payors have denied coverage for Actimmune for the treatment of IPF for a variety of reasons, including the cost of
Actimmune, the fact that IPF is not an FDA-approved indication for Actimmune or a third-party payors assessment that a particular patients case of IPF has advanced to a stage at which treatment with Actimmune would not have a significant
effect. We believe that approximately 60-70% of the patients who seek coverage for Actimmune for the treatment of IPF from private third-party payors are able to obtain coverage. While coverage trends have not changed significantly in the last few
years, major health plans could further restrict coverage or adopt a policy of no coverage since we have discontinued the INSPIRE trial and have no further development plans for Actimmune for the treatment of IPF.

Medicare generally does not provide coverage for drugs, like Actimmune, that are administered by injection in the home. Moreover, in
connection with the Medicare Prescription Drug Improvement and Modernization Act of 2003, Medicare has recently discussed the possibility of refusing to provide coverage for products for a specific indication unless the product has been approved by
the FDA for that indication. If Medicare were to make a formal decision not to cover the off-label use of products, it may have a negative impact on the willingness of private third-party payors to provide coverage for the off-label use of products
such as Actimmune.

If the specialty pharmacies and distributors that we rely upon to sell our products fail to perform,
our business may be adversely affected.

Our success depends on the continued customer support efforts of our network
of specialty pharmacies and distributors. A specialty pharmacy is a pharmacy that specializes in the dispensing of injectable or infused medications for complex or chronic conditions, which often require a high level of patient education and ongoing
management. The use of specialty pharmacies and distributors involves certain risks, including, but not limited to, risks that these specialty pharmacies and distributors will:



| |  |  | not provide us with accurate or timely information regarding their inventories, the number of patients who are using Actimmune or Actimmune complaints;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | not effectively sell or support Actimmune;
| | - |  | ------------------------------------------



| |  |  | reduce their efforts or discontinue to sell or support Actimmune;
| | - |  | -----------------------------------------------------------------



| |  |  | not devote the resources necessary to sell Actimmune in the volumes and within the time frames that we expect;
| | - |  | --------------------------------------------------------------------------------------------------------------



| |  |  | be unable to satisfy financial obligations to us or others; or
| | - |  | --------------------------------------------------------------



| |  |  | cease operations.
| | - |  | -----------------

Any such failure may result in decreased product sales and lower product revenue, which would harm our business.

The activities of competitive drug companies, or others, may limit our products revenue potential or render them obsolete.

Our commercial opportunities will be reduced or eliminated if our competitors develop or market products that, compared to our products or
product candidates:



| |  |  | are more effective;
| | - |  | -------------------



| |  |  | have fewer or less severe adverse side effects;
| | - |  | -----------------------------------------------



| |  |  | are better tolerated;
| | - |  | ---------------------



| |  |  | have better patient compliance;
| | - |  | -------------------------------



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| |  |  | receive better reimbursement terms;
| | - |  | -----------------------------------



| |  |  | are more accepted by physicians;
| | - |  | --------------------------------



| |  |  | are more adaptable to various modes of dosing;
| | - |  | ----------------------------------------------



| |  |  | have better distribution channels;
| | - |  | ----------------------------------



| |  |  | are easier to administer; or
| | - |  | ----------------------------



| |  |  | are less expensive, including but not limited to a generic version of pirfenidone.
| | - |  | ----------------------------------------------------------------------------------

Even if we are successful in developing effective drugs, our products may not compete effectively with our competitors current or
future products. We expect that pirfenidone may compete in the European Union and, if approved by the FDA in the U.S., may compete with other products that are being developed for the treatment of IPF, including possible generic versions of
pirfenidone in the U.S., European Union and potentially other markets following the expiration of, or in the absence of market exclusivity. Actelion has begun enrolling patients with IPF in a new exploratory study with macitentan, a tissue-targeting
endothelin receptor antagonist. In January 2009, Gilead initiated a Phase 3 clinical study of ambrisentan for the treatment of IPF that was halted due to lack of efficacy in December 2010. However, in December 2010, Gilead entered into an agreement
to acquire Arresto gaining Gilead access to Arrestos Phase 1 humanized monoclonal antibody compound, AB0024, currently in clinical development for the treatment of IPF. Boehringer Ingelheim (BI) has recently presented phase 2
data for BIBF-1120, a triple kinase inhibitor that has showed some potential efficacy at high doses in IPF. It is possible that BI will begin a Phase 3 IPF study sometime in 2011. Additionally, Pfizer Inc. is studying sildenafil in advanced IPF
patients to potentially improve exercise tolerance. This trial is in Phase 3 development. Pirfenidone has no composition of matter patent protection. Unless we have (i) Orphan Drug designation, (ii) data exclusivity protection or
(iii) other types of patent protection in a particular jurisdiction, we may face competition from a lower cost generic version of pirfenidone in such a jurisdiction. We expect that HCV therapies may compete with telaprevir, which is being
developed by Vertex Pharmaceuticals, Inc. and SCH 503034, which is being developed by Schering-Plough (now Merck & Co.). Both products have been filed with regulatory authorities in the US and EU seeking approval for the treatment of HCV.
There are four competitive HCV protease inhibitors in Phase 2: BI-201335, which is being developed by BI, BMS-201335, which is being developed by Bristol-Meyers Squibb, MK-7009, which is being developed by Merck and TMC-435450, which is being
developed by Tibotec and Medivir. Therefore there can be no assurance that any of the protease inhibitor compounds that are currently being developed in collaboration with Roche will continue to be developed or commercialized and therefore we may
not realize any economic benefit from these compounds. In addition, there are many pharmaceutical companies, biotechnology companies, public and private universities, government agencies and research organizations actively engaged in research and
development of products, some of which may target the same indications as our product candidates. Our competitors include larger, more established, fully integrated pharmaceutical companies and biotechnology companies that have substantially greater
capital resources, existing competitive products, larger research and development staffs and facilities, greater experience in drug development and in obtaining regulatory approvals and greater marketing capabilities than we do. For more
information, see Item 1. BusinessCompetition.

Our supply agreement with BI may restrict our
ability to establish alternative sources of Actimmune in a timely manner or at an acceptable cost, which may cause us to be unable to meet demand for Actimmune and to lose potential revenue.

Our supply agreement with BI provides that BI is our exclusive source of supply for Actimmune, except under certain circumstances. Under
the terms of the supply agreement, BI is not required to commit to reserving any minimum annual capacity for the manufacture of Actimmune and we cannot seek a secondary source to manufacture Actimmune until BI has indicated to us its inability or
unwillingness to meet our requirements. If we are delayed in establishing a secondary supply source for Actimmune, or cannot do so at an acceptable cost, we may suffer a shortage of commercial supply of Actimmune or a higher cost of product, either
of which would have a material and adverse effect on our revenue, business and financial prospects.

Risks Related to Our Intellectual
Property Rights

We may not be able to obtain, maintain and protect certain proprietary rights necessary for the
development and commercialization of our products or product candidates.

Our commercial success will depend in part on
obtaining and maintaining patent protection on our products and product candidates and successfully defending these patents against third-party challenges. Our ability to commercialize our products will also depend in



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part on the patent positions of third parties, including those of our competitors. The patent positions of pharmaceutical and biotechnology companies can be highly uncertain and involve complex
legal and factual questions. No consistent policy regarding the breadth of claims allowed in biotechnology patents has emerged to date. Accordingly, we cannot predict with certainty the scope and breadth of patent claims that may be afforded to
other companies patents. In addition, each country has its own rules regarding the allowability and enforceability of certain types of patents and therefore there can be no assurance that our patents applications will be granted or that our
issued patents will be enforceable in any given jurisdiction. We could incur substantial costs in litigation if we are required to defend against patent suits brought by third parties, or if we initiate suits to protect our patent rights.

The degree of future protection for our proprietary rights is uncertain, and we cannot ensure that:



| |  |  | we were the first to make the inventions covered by each of our pending patent applications;
| | - |  | --------------------------------------------------------------------------------------------



| |  |  | we were the first to file patent applications for these inventions;
| | - |  | -------------------------------------------------------------------



| |  |  | others will not independently develop similar or alternative technologies or duplicate any of our technologies;
| | - |  | ---------------------------------------------------------------------------------------------------------------



| |  |  | any of our pending patent applications will result in issued patents;
| | - |  | ---------------------------------------------------------------------



| |  |  | any of our issued patents or those of our licensors will be valid and enforceable;
| | - |  | ----------------------------------------------------------------------------------



| |  |  | any patents issued to us or our collaborators will provide a basis for commercially viable products or will provide us with any competitive advantages
or will not be challenged by third parties;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | we will develop additional proprietary technologies that are patentable; or
| | - |  | ---------------------------------------------------------------------------



| |  |  | the patents of others will not have a material adverse effect on our business.
| | - |  | ------------------------------------------------------------------------------

Others have filed and in the future may file patent applications covering uses and formulations of interferon gamma-1b, a pegylated
version of interferon gamma-1b, and other products in our development program. If a third party has been or is in the future issued a patent that blocked our ability to commercialize any of our products, alone or in combination, for any or all of
the diseases that we are targeting, we would be prevented from commercializing that product or combination of products for that disease or diseases unless we obtained a license from the patent holder. We may not be able to obtain such a license to a
blocking patent on commercially reasonable terms, if at all. If we cannot obtain, maintain and protect the necessary proprietary rights for the development and commercialization of our products or product candidates, our business and financial
prospects will be impaired.

Within the next few years various patents relating to interferon gamma-1b will expire and
we will lose our ability to rely upon the intellectual property we currently own to prevent others from marketing interferon gamma-1b in the United States, which may impair our ability to generate revenue.

We have licensed certain patents relating to interferon gamma-1b, the active ingredient in Actimmune, from Genentech (a wholly-owned
subsidiary of Roche). A U.S. patent relating to the composition of interferon gamma-1b expires in 2014. Other material U.S. patents relating to interferon gamma-1b expire between 2009 and 2013. We also previously purchased certain patents
relating to interferon gamma analogs from Amgen Inc. in 2002 including two U.S. patents that issued August 30, 2005 that will expire on August 30, 2022. When these various patents expire, we will be unable to use these patents to try
to block others from marketing interferon gamma-1b in the United States and, as a result, sales of Actimmune may decline and our ability to generate revenue may decrease.

Pirfenidone is the only commercially approved drug approved for the treatment of mild to moderate IPF. There are no other existing approved treatments. Therefore the incidence and prevalence of IPF
that currently provide the basis of orphan drug designation in the European Union and the United States could change over time, and it is possible that orphan drug designation could be lost in these markets should the patient population exceed that
required to maintain orphan drug status in these countries

Market exclusivity afforded by Orphan Drug designation is
generally offered as an incentive to drug developers to invest in developing and commercializing products for unique diseases that impact a limited number of patients. With respect to the United States, the FDA may grant orphan drug designation to
drugs intended to treat a rare disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the United States. The company that obtains the first FDA approval for a



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designated orphan drug for a rare disease receives marketing exclusivity for use of that drug for the designated condition for a period of seven years from the date of approval. The orphan drug
rules are similar in the European Union and marketing exclusivity is for a period of ten years from the date of approval. Qualification to maintain Orphan Drug status is generally monitored by the regulatory authorities during the Orphan Drug
exclusivity period. IPF is currently a poorly diagnosed disease in these markets. It is possible that with the approval of Esbriet in the European Union, and the potential approval of pirfenidone in the United States, that the incidence and
prevalence numbers for IPF could change in these markets. Should the incidence and prevalence of IPF patients who are eligible to receive pirfenidone for the treatment of IPF in these markets materially increase, it is possible that the orphan drug
designation, and related market exclusivity, in these jurisdictions could be lost.

The pirfenidone molecule itself has
no composition of matter patent protection in the United States or elsewhere, and may only be protected for the treatment of IPF by orphan drug designation in the United States and European Union.

The pirfenidone molecule itself has no composition of matter patent protection in the United States or elsewhere. The FDA and the EMA
granted pirfenidone orphan drug designation for the treatment of IPF in 2004, which we currently anticipate will provide us seven and ten years of market exclusivity in the U.S. and EU, respectively, for the use of pirfenidone for the treatment of
IPF from the date that pirfenidone is approved. Therefore, we may not have the ability to prevent others from commercializing pirfenidone for (i) IPF after the orphan drug designation exclusivity period ends, (ii) uses or pirfenidone
covered by other patents held by third parties, or (iii) other uses of pirfenidone in the public domain for which there is no patent protection. We are relying on exclusivity granted from orphan drug designation in IPF to protect pirfenidone
from competitors in this indication. In the EU we have been granted orphan drug designation for pirfenidone for the treatment of IPF by the EMA, which provides for ten years of market exclusivity until March 2021. The exclusivity period afforded by
orphan drug designation in the United States begins on first NDA approval for this product in IPF and ends seven years thereafter. We cannot provide any assurance that we will be able to maintain this orphan drug designation. Furthermore, although
pirfenidone has received orphan drug marketing exclusivity for the treatment of patients with IPF, the FDA and/or the EMA can still approve different drugs for use in treating the same indication or disease, which would create a more competitive
market for us and our revenues will be diminished.

In addition, other third parties have obtained patents in the United
States and elsewhere relating to formulation and methods of use of pirfenidone for the treatment of certain diseases. As a result, it is possible that we could face competition from third party products that have pirfenidone as the active
pharmaceutical ingredient. If a third party were to obtain FDA approval in the United States for the use of pirfenidone, or regulatory approval in another jurisdiction, for an indication before we did, such third party would be first to market and
could establish the price for pirfenidone in these jurisdictions. This could adversely impact our ability to implement our pricing strategy for the product and may limit our ability to maximize the commercial potential of pirfenidone in the United
States and elsewhere. The presence of a lower priced competitive product with the same active pharmaceutical ingredients as our product could lead to use of the competitive product for our anti-fibrotic indications. This could lead to pricing
pressure for pirfenidone, which would adversely affect our ability to generate revenue from the sale of pirfenidone for anti-fibrotic indications.

Following expiration of orphan drug designation in the European Union, and if approved for commercial use by the FDA, in the United States, our current intellectual property portfolio may not prove
to be sufficient to protect the continued exclusivity of pirfenidone for the treatment in adults of mild to moderate IPF.

Because the pirfenidone molecule itself has no composition of matter patent protection in the United States or elsewhere, following expiration of orphan drug designation in the European Union, and if
approved for commercial use by the FDA, in the United States, we must rely primarily on the protection afforded by the formulation and method of use patents relating to the use of pirfenidone for the treatment in adults of mild to moderate IPF.

We have a number of granted, allowed and pending patent applications in Europe relating to Esbriets formulation and use
in IPF patients, particularly related to the safe and efficacious usage of the product. This collection of patents is currently expected to provide patent protection in Europe until 2030, and includes a granted patent that relates to the effect of
food on the pharmacokinetics and safety of pirfenidone in IPF patients, which expires in late 2026. In addition two patents have recently been allowed in Europe, one of which relates to the safe usage of Esbriet in patients who develop elevation in
liver transaminase levels, which expires in late 2029, and a second relating to the titration of the dosing of Esbriet at the initiation of therapy, which expires in late 2027. We also have three other patents under review in Europe that if granted,
are currently expected to extend exclusivity of pirfenidone for the treatment in adults of mild to moderate IPF until 2030. We also have five issued patent in the United States relating to the safe and effective use of pirfenidone in the United
States. In addition we have numerous pending patents under active prosecution in other foreign jurisdictions including among others, Canada , Australia and certain countries in Latin America. The laws regarding enforceability of patents such as ours
may vary on a country by country basis.



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These patents can be challenged by our competitors in various jurisdictions who may argue
such patents are invalid or unenforceable, lack sufficient written description or enablement, or that the claims of the issued patents should be limited or narrowly construed. Additionally, even if the validity of these patents were upheld in a
patent challenge, a court may refuse to stop the other party from practicing the activity at issue on the ground that its activities are not covered by our patents. Any of these outcomes would limit our ability to exclusively market pirfenidone for
the treatment in adults of mild to moderate IPF in the European Union, and if approved for commercial use by the FDA, in the United States, as well as certain other countries where we have filed for patent protection.

If we breach our license agreement with Genentech, we may lose our ability to develop and market Actimmune.

We license certain patents and trade secrets relating to Actimmune from Genentech. If we breach this agreement with Genentech, they may be
able to terminate the respective license, and we would have no further rights to utilize the licensed patents or trade secrets to develop and market Actimmune, which could adversely affect our revenue and financial prospects.

Litigation or third-party claims of intellectual property infringement could require us to spend substantial time and money and
could adversely affect our ability to develop and commercialize products.

Our commercial success depends in part on
our ability and the ability of our collaborators to avoid infringing patents and proprietary rights of third parties. Third parties may accuse us or our collaborators of employing their proprietary technology in our products, or in the materials or
processes used to research or develop our products, without authorization. Any legal action against our collaborators or us claiming damages and/or seeking to stop our commercial activities relating to the affected products, materials and processes
could, in addition to subjecting us to potential liability for damages, require our collaborators or us to obtain a license to continue to utilize the affected materials or processes or to manufacture or market the affected products. We cannot
predict whether we, or our collaborators, would prevail in any of these actions or whether any license required under any of these patents would be made available on commercially reasonable terms, if at all. If we are unable to obtain such a
license, we, or our collaborators, may be unable to continue to utilize the affected materials or processes or manufacture or market the affected products or we may be obligated by a court to pay substantial royalties and/or other damages to the
patent holder. Even if we are able to obtain such a license, the terms of such a license could substantially reduce the commercial value of the affected product or products and impair our prospects for profitability. Accordingly, we cannot predict
whether or to what extent the commercial value of the affected product or products or our prospects for profitability may be harmed as a result of any of the liabilities discussed above. Furthermore, infringement and other intellectual property
claims, with or without merit, can be expensive and time-consuming to litigate and can divert managements attention from our core business.

If the owners of the intellectual property we license fail to maintain the intellectual property, we may lose our rights to develop our products or product candidates.

We generally do not control the patent prosecution of intellectual property that we license from third parties. Accordingly, we are unable
to exercise the same degree of control over this intellectual property as we would exercise over intellectual property that we own, and, as a result, we may lose our rights to such intellectual property and incur substantial costs. For example, if
Genentech fails to maintain the intellectual property rights related to Actimmune licensed to us, we may lose our rights to develop and market certain therapeutic uses for Actimmune and may be forced to incur substantial additional costs to maintain
or protect our intellectual property rights or to compel Genentech to do so.

If our employees, consultants and vendors
do not comply with their confidentiality agreements or our trade secrets otherwise become known, our ability to generate revenue and profits may be impaired.

Patent prosecution may not be appropriate or obtainable for certain of our technologies, and we may instead protect such proprietary information as trade secrets. We protect these rights mainly through
confidentiality agreements with our corporate partners, employees, consultants and vendors. These agreements generally provide that all confidential information developed or made known to an individual or company during the course of their
relationship with us will be kept confidential and will not be used or disclosed to third parties except in specified circumstances. In the case of employees and consultants, our agreements generally provide that all inventions made by the
individual while engaged by us will be our exclusive property. We cannot be certain that these parties will comply with these confidentiality agreements, that we will have adequate remedies for any breach, or that our trade secrets will not
otherwise become known or be independently discovered by our competitors. If our trade secrets become known, we may lose a competitive advantage and our ability to generate revenue may therefore be impaired.



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By working with corporate partners, research collaborators and scientific advisors, we
are subject to disputes over intellectual property, and our ability to obtain patent protection or protect proprietary information may be impaired.

Under some of our research and development agreements, inventions discovered in certain cases become jointly owned by our corporate partner and us and in other cases become the exclusive property of one
of us. It can be difficult to determine who owns a particular invention, and disputes could arise regarding those inventions. These disputes could be costly and could divert managements attention from our business. Our research collaborators
and scientific advisors have some rights to publish our data and proprietary information in which we have rights. Such publications may impair our ability to obtain patent protection or protect our proprietary information, which could impair our
ability to generate revenue.

Risks Related to Our Financial Results and Other Risks Related to Our Business

If we continue to incur net losses for an extended period of time, we may be unable to continue our business.

We have incurred net losses since inception, and our accumulated deficit was approximately $793.1 million at December 31, 2010.
We expect to incur substantial additional net losses prior to achieving profitability, if ever. The extent of our future net losses and the timing of our profitability are highly uncertain, and we may never achieve profitable operations. We are
planning to expand the number of diseases for which our products may be marketed, and this expansion will require significant expenditures. To date, we have generated revenue primarily through the sale of Actimmune. However, Actimmune sales have
decreased in recent periods and we expect this trend to continue into the future. We have not generated operating profits to date from our products. If the time required for us to achieve profitability is longer than we anticipate, we may not be
able to continue our business.

As a result of the termination of our 2006 Collaboration Agreement with Roche, Roche has
the right to market and sell products that compete with our product candidates, and any competition by Roche could have a material adverse effect on our business.

In connection with sale of all our worldwide development and commercialization rights to danoprevir to Roche, the collaboration agreement we entered into with Roche in October 2006 was terminated. Prior
to its termination, Roche had agreed pursuant to the collaboration agreement that, except as set forth in the collaboration agreement, it would not develop or commercialize specific competitive products meeting certain criteria during the
exclusivity period, which extended until October 2011. As a result of the termination of the collaboration agreement, Roche may now freely develop or commercialize competitive products, including danoprevir, which could be competitive with our
remaining HCV program. Roche has significantly greater financial, technical and human resources than we have and they are better equipped to discover, develop, manufacture and commercialize products. In addition, Roche has more extensive experience
than we have in preclinical studies and clinical trials, obtaining regulatory approvals and manufacturing and marketing pharmaceutical products. In the event that Roche competes with us, our business could be materially and adversely affected.

Revenue from the sale of Actimmune has been declining and is expected to decline further.

Physicians may choose not to prescribe Actimmune or provide fewer patient referrals for Actimmune for the treatment of IPF for a variety
of reasons, some of which are because:



| |  |  | Actimmune is not approved by the FDA for the treatment of IPF, and we therefore are unable to market or promote Actimmune for the treatment of
IPF;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | in our initial and Phase 3 INSPIRE clinical trials, Actimmune failed to meet the primary and secondary endpoints;
| | - |  | -----------------------------------------------------------------------------------------------------------------



| |  |  | physicians prefer to enroll their patients in clinical trials for the treatment of IPF;
| | - |  | ---------------------------------------------------------------------------------------



| |  |  | Actimmune does not have a drug compendia listing, often a criterion used by third-party payors to decide whether or not to reimburse off-label
prescriptions;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | physicians patients are unable to receive or lose reimbursement from a third-party reimbursement organization;
| | - |  | ---------------------------------------------------------------------------------------------------------------



| |  |  | physicians are not confident that Actimmune has a clinically significant treatment effect for IPF; or
| | - |  | -----------------------------------------------------------------------------------------------------



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| |  |  | a competing product shows a clinically significant treatment effect for IPF.
| | - |  | ----------------------------------------------------------------------------

If we fail to obtain the capital necessary to fund our operations, we will be unable to successfully execute our business plan.

We believe our existing cash, cash equivalents and available-for-sale securities, along with anticipated cash flows
from our sales of Actimmune, will be sufficient to fund our operating expenses, settlement with the government, debt obligations and capital requirements under our current business plan beyond the end of 2011. However, our current plans and
assumptions may change, and our capital requirements may increase. We have no committed sources of capital and do not know whether additional financing will be available when needed, or, if available, that the terms will be favorable to our
stockholders or us. If additional funds are not available, we may be forced to delay or terminate clinical trials, curtail operations or obtain funds through collaborative and licensing arrangements that may require us to relinquish commercial
rights or potential markets, or grant licenses on terms that are not favorable to us. If adequate funds are not available, we will not be able to successfully execute our business plan.

Budget or cash constraints may force us to delay our efforts to develop certain products in favor of developing others, which may
prevent us from meeting our stated timetables and commercializing those products as quickly as possible, or take certain cost saving efforts that could harm our financial results.

Because we are an emerging company with limited resources, and because research and development is an expensive process, we must regularly
assess the most efficient allocation of our research and development resources. Accordingly, we may choose to delay our research and development efforts for a promising product candidate to allocate those resources to another program, which could
cause us to fall behind our initial timetables for development of certain product candidates. As a result, we may not be able to fully realize the value of some of our product candidates in a timely manner, since they will be delayed in reaching the
market, or may not reach the market at all. For example, on May 4, 2010, with respect to our NDA for pirfenidone for IPF, we received a Complete Response Letter from the FDA requesting an additional clinical trial to support the efficacy of
pirfenidone. On August 2, 2010, we and our advisors met with representatives of the Division of Pulmonary, Allergy and Rheumatology Products in the Office of Drug Evaluation II of the FDA to gain a better understanding of the Complete Response
Letter. In connection with that meeting, the FDAs representatives reiterated the request that we conduct an additional Phase 3 study to demonstrate the efficacy of pirfenidone in IPF prior to marketing approval. In addition to meeting with
representatives of the FDA, we completed extensive analyses of our IPF databases and consulted with a broad set of regulatory, clinical and statistical experts. As recommended by the FDA in its complete response letter, we currently plan to conduct
a new Phase 3 clinical study that would demonstrate a clinically meaningful effect on forced vital capacity, with the goal of having the first patient enrolled in the study during the first half of 2011. We have a meeting scheduled with the FDA in
March 2011 to discuss our plans regarding the additional Phase 3 clinical study of pirfenidone. Given our limited resources and because the FDAs recommendations with regard to the new Phase 3 study are not yet known, we may choose to delay
conducting such an additional trial or not conduct such an additional trial at all which would prevent us from commercializing pirfenidone in the United States and harm our business.

Due to cash constraints or for strategic business reasons we may decide to take certain actions that reduce our expenses. For example, we
sold to Roche our worldwide development and commercialization rights to danoprevir and received $175.0 million from the sale of such rights. On a forward-looking basis we will not incur the expense associated with further investment in danoprevir,
however, our rights to share profits from sales of danoprevir in the United States have also been terminated, and, as a result our business and future financial results may be harmed.

Negative conditions in the global markets may impair the liquidity of a portion of our investment portfolio.

Our investment securities consist of high-grade corporate debt securities, government agency securities and direct government obligation
securities. Due to recent credit market and global economic conditions, markets for certain fixed-income securities have been volatile and have experienced limitations in liquidity. If there is insufficient demand for the securities we hold, we
may not have liquid access to our investments and may be required to recognize an impairment for those securities should we conclude that such impairment is other-than-temporary. For example, as recently as September 30, 2010 we held in our
investment portfolio $4.8 million of auction rate securities that had experienced illiquid market conditions requiring us to previously adjust the carrying-value of these securities. As of December 31, 2010, all of our auction rate securities
had been sold or redeemed.



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Failure to accurately forecast our future revenue could result in additional charges
for excess inventories or non-cancelable purchase obligations.

We base many of our operating decisions on anticipated
revenue trends and competitive market conditions, which are difficult to predict. Based on projected revenue trends, we acquired inventories and entered into non-cancelable purchase obligations in order to meet demand for our products. However, more
recent projected revenue trends resulted in us recording charges of $0.5 million, $0.3 million and $0.7 million in 2010, 2009 and 2008, respectively, for excess inventories from previous years contractual purchases. If revenue levels
experienced in future quarters are substantially below our expectations, we could be required to record additional charges for excess inventories and/or non-cancelable purchase obligations.

Our indebtedness and debt service obligations may adversely affect our cash flow.

As of December 31, 2010, our annual debt service obligation on the $85.0 million in aggregate principal amount of our 5.00%
convertible senior notes due March 1, 2015 was $4.3 million.

We intend to fulfill our current debt service
obligations, including repayment of the principal, if required, both from cash generated by our operations and from our existing cash and investments. If we are unable to generate sufficient cash to meet these obligations and need to use existing
cash or liquidate investments in order to fund our current debt service obligations, including repayment of the principal, we may have to delay or curtail research and development programs.

We may add additional lease lines to finance capital expenditures and may obtain additional long-term debt and lines of credit. If we
issue other debt securities in the future, our debt service obligations will increase further.

Our indebtedness could have
significant additional negative consequences, including, but not limited to:



| |  |  | requiring the dedication of a substantial portion of our expected cash flow from operations to service our indebtedness, thereby reducing the amount of
our expected cash flow available for other purposes, including capital expenditures;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | dilution experienced by our existing stockholders as a result of the conversion of our outstanding debt into shares of common stock;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------



| |  |  | increasing our vulnerability to general adverse economic and industry conditions;
| | - |  | ---------------------------------------------------------------------------------



| |  |  | limiting our ability to obtain additional financing;
| | - |  | ----------------------------------------------------



| |  |  | limiting our flexibility in planning for, or reacting to, changes in our business and the industry in which we compete; and
| | - |  | ---------------------------------------------------------------------------------------------------------------------------



| |  |  | placing us at a possible competitive disadvantage to less leveraged competitors and competitors that have better access to capital resources.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------

We may not have the ability to raise the funds necessary to finance any required redemptions of our
outstanding 5.00% convertible senior notes due 2015, which might constitute a default by us.

If a designated event,
such as the termination of trading of our common stock on the NASDAQ Global Select Market or a specified change of control transaction occurs prior to maturity, we may be required to redeem all or part of our 5.00% convertible senior notes due 2015.
We may not have enough funds to pay the redemption price for all tendered notes. Although the indentures governing the 5.00% convertible senior notes due 2015 allow us in certain circumstances to pay the applicable redemption prices in shares of our
common stock, if a designated event were to occur, we may not have sufficient funds to pay the redemption prices for all the notes tendered.

We have not established a sinking fund for payment of our outstanding notes, nor do we anticipate doing so. In addition, any future credit agreements or other agreements relating to our indebtedness may
contain provisions prohibiting redemption of our outstanding notes under certain circumstances, or expressly prohibit our redemption of our outstanding notes upon a designated event or may provide that a designated event constitutes an event of
default under that agreement. If a designated event occurs at a time when we are prohibited from purchasing or redeeming our outstanding notes, we could seek the consent of our lenders to redeem our outstanding notes or attempt to refinance this
debt. If we do not obtain consent, we would not be permitted to purchase or redeem our



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outstanding notes. Our failure to redeem tendered notes would constitute an event of default under the indenture for the notes, which might constitute a default under the terms of our other
indebtedness.

If product liability lawsuits are brought against us, we may incur substantial liabilities.

The testing, marketing and sale of medical products entail an inherent risk of product liability. We have product
liability risk for all of our product candidates and for all of the clinical trials we conduct, including our discontinued INSPIRE trial. If product liability costs exceed our liability insurance coverage, we may incur substantial liabilities.
Whether or not we were ultimately successful in product liability litigation, such litigation would consume substantial amounts of our financial and managerial resources, and might result in adverse publicity, all of which would impair our business.
While we believe that our clinical trial and product liability insurance currently provides adequate protection to our business, we may not be able to maintain our clinical trial insurance or product liability insurance at an acceptable cost, if at
all, and this insurance may not provide adequate coverage against potential claims or losses.

If we materially breach
the representations and warranties we made to Roche under the Asset Purchase Agreement or any of our other contractual obligations, Roche has the right to seek indemnification from us for damages it suffers as a result of such breach. These amounts
could be significant.

We have agreed to indemnify Roche and its affiliates against losses suffered as a result of our
material breach of representations and warranties and our other obligations in the Asset Purchase Agreement we entered into with Roche and its affiliates in connection with our sale of our worldwide development and commercialization rights to
danoprevir. If one or more of our representations and warranties were not true at the time we made them to Roche, we would be in breach of the Asset Purchase Agreement. In the event of a breach by us, Roche has the right to seek indemnification from
us for damages suffered by Roche as a result of such breach. The amounts for which we could become liable to Roche may be significant.

Our use of hazardous materials, chemicals, viruses and radioactive compounds exposes us to potential liabilities.

Our research and development activities involve the controlled use and disposal of hazardous materials, chemicals, infectious disease agents and various radioactive compounds. Although we believe that our
safety procedures for handling and disposing of such materials comply with the standards prescribed by state and federal regulations, we cannot completely eliminate the risk of accidental contamination or injury from these materials. In the event of
such an accident, we could be held liable for significant damages or fines, which may not be covered by or may exceed our insurance coverage.

Insurance coverage is increasingly difficult to obtain or maintain.

While we currently maintain clinical trial and product liability insurance, directors and officers liability insurance,
general liability insurance, property insurance and warehouse and transit insurance, first- and third-party insurance is increasingly more costly and narrower in scope, and we may be required to assume more risk in the future. If we are subject to
third-party claims or suffer a loss or damage in excess of our insurance coverage, we may be required to share that risk in excess of our insurance limits. Furthermore, any first- or third-party claims made on our insurance policies may impact our
future ability to obtain or maintain insurance coverage at reasonable costs, if at all.

Failure to attract, retain and
motivate skilled personnel and cultivate key academic collaborations will delay our product development programs and our business development efforts.

As of March 1, 2011, we had 105 full-time employees, and our success depends on our continued ability to attract, retain and motivate highly qualified management and scientific personnel and on our
ability to develop relationships with leading academic scientists. Competition for personnel and academic collaborations is intense. We are highly dependent on our current management and key scientific and technical personnel, including Daniel G.
Welch, our Chairman, Chief Executive Officer and President, as well as the other principal members of our management. None of our employees, including members of our management team, has a long-term employment contract, and any of our employees can
leave at any time. Our success will depend in part on retaining the services of our existing management and key personnel and attracting and retaining new highly qualified personnel. In addition, we may need to hire additional personnel and develop
additional academic collaborations if we expand our research and development activities. We do not know if we will be able to attract, retain or motivate personnel or cultivate academic collaborations. Our inability to hire, retain or motivate
qualified personnel or cultivate academic collaborations would harm our business.



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Our ability to use our net operating losses and certain other tax attributes may be
subject to annual limitations under federal and state tax law that could materially affect our ability to utilize such losses and attributes.

If a corporation undergoes an ownership change within the meaning of section 382 of the Internal Revenue Code, or section 382, the corporations ability to utilize any net operating
losses (NOLs), and certain tax credits and other attributes generated before such an ownership change, is limited. We believe that we have in the past experienced ownership changes within the meaning of section 382 that have resulted in
limitations under section 382 (and similar state provisions) on the use of our NOLs and other tax attributes. Future changes in ownership could result in additional ownership changes within the meaning of section 382 that could further limit our
ability to utilize our NOLs and certain other tax attributes.

Risks Related to Ownership of our Common Stock

We may fail to meet our publicly announced financial guidance or other expectations about our business, which would cause our stock
to decline in value.

There are a number of reasons why we might fail to meet our financial guidance or other
expectations about our business, including, but not limited to, the following:



| |  |  | negative developments or setbacks in our application to obtain marketing approval for pirfenidone in the United States, including negative results of
our planned Phase 3 clinical study and/or a negative response from the FDA;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | delays or unexpected difficulties in our commercial launch of Esbriet in the European Union;
| | - |  | --------------------------------------------------------------------------------------------



| |  |  | if only a subset of or no affected patients respond to therapy with any of our products or product candidates;
| | - |  | --------------------------------------------------------------------------------------------------------------



| |  |  | the actual dose or efficacy of the product for a particular condition may be different than currently anticipated;
| | - |  | ------------------------------------------------------------------------------------------------------------------



| |  |  | negative publicity about the results of our clinical studies, such as the 2007 failure of Actimmune to meet its primary endpoint in the INSPIRE trial
and our resulting decision to discontinue the trial, the failure of pirfenidone to meet its primary endpoint and the PFS secondary endpoint in the CAPACITY 1 trial, or those of others with similar or related products may reduce demand for our
products and product candidates;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the treatment regimen may be different in duration than currently anticipated;
| | - |  | ------------------------------------------------------------------------------



| |  |  | treatment may be sporadic;
| | - |  | --------------------------



| |  |  | we may not be able to sell a product at the price we expect;
| | - |  | ------------------------------------------------------------



| |  |  | we may not be able to accurately calculate the number of patients using the product;
| | - |  | ------------------------------------------------------------------------------------



| |  |  | we may not be able to supply enough product to meet demand;
| | - |  | -----------------------------------------------------------



| |  |  | there may be current and future competitive products that have greater acceptance in the market than our products do;
| | - |  | ---------------------------------------------------------------------------------------------------------------------



| |  |  | we may decide to divest a product;
| | - |  | ----------------------------------



| |  |  | our development activities may proceed faster than planned;
| | - |  | -----------------------------------------------------------



| |  |  | we may decide to change our marketing and educational programs;
| | - |  | ---------------------------------------------------------------



| |  |  | clinical trial participation may reduce product sales; or
| | - |  | ---------------------------------------------------------



| |  |  | physicians prescriptions or patient referrals for Actimmune may decline.
| | - |  | -------------------------------------------------------------------------

If we fail to meet our revenue and/or expense projections and/or other financial guidance for any reason, our stock could decline in
value.



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Conversion of our outstanding 5.00% convertible senior notes due in 2015 will dilute
the ownership interest of existing stockholders and could adversely affect the market price of our common stock.

Our
outstanding 5.00% convertible senior notes due 2015 are convertible at or prior to maturity, at the option of the holder, into shares of our common stock at a specific price, subject to the satisfaction of certain conditions. We must settle
conversion of our 5.00% notes due 2015 in common stock only. If any or all of these existing notes are converted into shares of our common stock, our existing stockholders will experience immediate dilution and our common stock price may be
subject to downward pressure.

Failure to maintain effective internal control over financial reporting in accordance
with Section 404 of the Sarbanes-Oxley Act of 2002 could have a material adverse effect on our stock price.

Section 404 of the Sarbanes-Oxley Act of 2002 and the related rules and regulations of the Securities and Exchange Commission, (the
Commission), require an annual management assessment of the effectiveness of our internal control over financial reporting and a report by our independent registered public accounting firm attesting to the effectiveness of our internal
control over financial reporting at the end of the fiscal year. If we fail to maintain the adequacy of our internal control over financial reporting, as such standards are modified, supplemented or amended from time to time, we may not be able to
ensure that we can conclude on an ongoing basis that we have effective internal control over financial reporting in accordance with Section 404 of the Sarbanes-Oxley Act of 2002 and the related rules and regulations of the Commission. If we
cannot in the future favorably assess, or our independent registered public accounting firm is unable to provide an unqualified attestation report on, the effectiveness of our internal control over financial reporting, investor confidence in the
reliability of our financial reports may be adversely affected, which could have a material adverse effect on our stock price.

Our stock price may be volatile, and an investment in our stock could decline in value.

The trading price of our common stock has been and is likely to continue to be extremely volatile. During the twelve-month period ended
December 31, 2010, the closing price of our common stock on the NASDAQ Global Select Market ranged from a high of $48.14 in April 2010 to a low of $8.58 in June 2010 and traded as low as $12.53 in the fourth quarter of 2010. Our stock price
could be subject to wide fluctuations in response to a variety of factors, including, but not limited to any announcements made by Shionogi with respect to their pirfenidone product and all the factors discussed in this Risk Factors
section.

In addition, the stock market in general, and the stock price of companies listed on the NASDAQ, and biotechnology
companies in particular, have experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of these companies. Broad market and industry factors may negatively affect the market
price of our common stock, regardless of actual operating performance. Periods of volatility in the market price of a companys securities frequently results in securities class action and shareholder derivative litigation against that company.
This type of litigation can result in substantial costs and a diversion of managements attention and resources.

If our officers, directors and certain stockholders choose to act together, they may be able to significantly influence our
management and operations, acting in their own best interests and not necessarily those of other stockholders.

At
December 31, 2010, our directors, executive officers and greater than 5% stockholders and their affiliates beneficially owned approximately 56.0% of our issued and outstanding common stock. Accordingly, our directors, executive officers and
greater than 5% stockholders collectively may have the ability to significantly influence the election of all of our directors and to significantly influence the outcome of corporate actions requiring stockholder approval, such as mergers or a
financing in which we sell more than 20% of our voting stock at a discount to market price. They may exercise this ability in a manner that advances their own best interests and not necessarily those of other stockholders. This concentration of
ownership could also depress our stock price.

Substantial sales of shares may negatively impact the market price of our
common stock.

If our stockholders sell substantial amounts of our common stock, including shares issued upon the
exercise of outstanding options or conversion of our outstanding convertible notes the market price of our common stock may decline. In addition, the existence of our outstanding convertible notes may encourage short selling by market participants.
These sales also might make it more difficult for us to sell equity or equity related securities in the future at a time and price that we deem appropriate. We are unable to predict the effect that sales may have on the then-prevailing market price
of our common stock.



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We have filed registration statements covering the approximately 15,294,802 shares of
common stock that are either issuable upon the exercise of outstanding options or reserved for future issuance pursuant to our stock plans as of December 31, 2010. Additionally, on March 1, 2011, the holders of all of our remaining
outstanding 2011 Notes, approximately $45.0 million in aggregate principal, elected to convert the outstanding 2011 Notes into an aggregate of 2,078,561 shares of our common stock. The resale of these shares is covered by a shelf registration
statement.

Our stockholder Rights Plan allows Warburg Pincus Equity Partners, L.P. and certain of its affiliates
(Warburg Pincus) to acquire up to 25% of our outstanding common stock. Warburg Pincus has agreed to certain limitations on the manner in which it may dispose of its ownership interest InterMune pursuant to a standstill agreement.
Jonathan S. Leff, a member of our board of directors, is a managing director of Warburg Pincus LLC and a partner of Warburg Pincus & Co., which are affiliates of Warburg, Pincus Equity Partners, L.P. In September 2009, we filed a shelf
registration statement covering the sale of 7,357,549 shares held by Warburg Pincus and up to $200 million from any combination of debt securities, preferred stock, common stock or warrants that may be sold by us, pursuant to which we sold 8,050,000
shares of registered common stock in our January 2010 public offering.

We have implemented anti-takeover provisions,
which could discourage, prevent or delay a takeover, even if the acquisition would be beneficial to our stockholders, or frustrate or prevent any attempts by our stockholders to replace or remove our current management or board of directors.

The existence of our stockholder Rights Plan and provisions of our Amended and Restated Certificate of Incorporation
and Bylaws, as well as provisions of Delaware law, could make it more difficult for a third party to acquire us, even if doing so would benefit our stockholders. In addition, these provisions may frustrate or prevent any attempts by our stockholders
to replace or remove our current management by making it more difficult for stockholders to replace members of our board of directors. Because our board of directors is responsible for appointing the members of our management team, these provisions
could in turn affect any attempt by our stockholders to replace current members of our management team. These provisions:



| |  |  | establish a classified board of directors so that not all members of our board may be elected at one time;
| | - |  | ----------------------------------------------------------------------------------------------------------



| |  |  | authorize the issuance of up to 5,000,000 shares of blank check preferred stock that could be issued by our board of directors to
increase the number of outstanding shares and hinder a takeover attempt;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | limit who may call a special meeting of stockholders;
| | - |  | -----------------------------------------------------



| |  |  | prohibit stockholder action by written consent, thereby requiring all stockholder actions to be taken at a meeting of our stockholders; and
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | establish advance notice requirements for nominations for election to our board of directors or for proposing matters that can be acted upon at
stockholder meetings.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------

In addition, Section 203 of the Delaware General Corporation Law, which
prohibits business combinations between us and one or more significant stockholders unless specified conditions are met, may discourage, delay or prevent a third party from acquiring us.

We have never paid dividends on our capital stock, and we do not anticipate paying any cash dividends in the foreseeable future.

We have never declared or paid any dividends on our capital stock. We currently intend to retain all of our future
earnings, if any, to finance our operations and do not anticipate paying any cash dividends on our capital stock in the foreseeable future. As a result, capital appreciation, if any, of our common stock will be the sole source of gain for investors
in our common stock for the foreseeable future.



|ITEM 1B. | UNRESOLVED STAFF COMMENTS
|-------- | -------------------------

None.



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ITEM 2.PROPERTIES

Our facilities currently consist of approximately 55,898 square feet of office space located at our headquarters at 3280 Bayshore
Boulevard, Brisbane, California. In December 2000, we entered into a ten-year lease for this building, subsequently extended for an additional five years. In May 2006, we entered into an amendment to our existing lease to expand our existing office
and laboratory space by approximately 15,000 square feet on the first floor of 3260 Bayshore Boulevard, Brisbane, California. The lease expires concurrently with our existing facility lease in April 2016. In 2010, we also entered into a lease
agreement in Reinach, Switzerland where we have established our European headquarters. In January 2011, we entered into a lease agreement in Berlin, Germany and expect to enter into future lease agreements where we have established additional
European subsidiaries. We believe that our facilities are adequate for our current needs, and that suitable additional or substitute space will be available in the future to replace our existing facility, if necessary, or to accommodate expansion of
our operations.

ITEM 3.LEGAL PROCEEDINGS

Class Action Lawsuits

In May 2008, a complaint was filed in the United States District Court for the Northern District of California entitled Deborah Jane Jarrett, Nancy Isenhower, and Jeffrey H. Frankel v. InterMune, Inc., W.
Scott Harkonen, and Genentech, Inc., Case No. C-08-02376. Plaintiffs alleged that they were administered Actimmune, and they purported to sue on behalf of a class of consumers and other end-payors of Actimmune. The complaint alleged that the Company
fraudulently misrepresented the medical benefits of Actimmune for the treatment of IPF and promoted Actimmune for IPF. The complaint asserted various claims against the Company, including civil RICO, unfair competition, violation of various state
consumer protection statutes, and unjust enrichment. The complaint sought various damages in an unspecified amount, including compensatory damages, treble damages, punitive damages, restitution, disgorgement, prejudgment and post-judgment interest
on any monetary award, and the reimbursement of the plaintiffs legal fees and costs. The complaint also sought equitable relief. Between June 2008 and September 2008, three additional complaints were filed in the United States District Court
for the Northern District of California alleging similar facts. In February 2009, the Court consolidated the four complaints for pretrial purposes.

The motions to dismiss in all four cases were heard in February 2009. In April 2009, the Court granted the motions to dismiss the complaints in all four cases in their entirety and granted the plaintiffs
leave to amend the complaints. Following the initial motion to dismiss, the plaintiffs have filed amended complaints and on January 25, 2010, the Company and the other defendants each filed motions to dismiss the most recently filed amended
complaints. Pursuant to stipulation of the parties, plaintiffs have filed an opposition to these motions. All these motions were fully briefed as of March 8, and were heard on May 10, 2010. On September 1, 2010, the Court issued an
opinion dismissing all remaining claims in all consolidated cases with prejudice and entered judgment accordingly. On October 1, 2010, the remaining plaintiffs in all cases filed notices of appeal, appealing the judgment to the United States
Court of Appeals for the Ninth Circuit. Plaintiffs opening briefs were filed on February 14, 2011. The Company and other defendants answering briefs are due on March 24, 2011, and plaintiffs optional reply briefs are due
within 14 days of service of the last-served answering brief.

The Company believes it has substantial factual and legal
defenses to the claims at issue and intends to defend the actions vigorously. We may enter into discussions regarding settlement of these matters, and may enter into settlement agreements, if we believe settlement is in the best interests of our
stockholders. We cannot reasonably estimate the possible loss or range of loss that may arise from these lawsuits.

Department of Justice Settlement

On November 9, 2004, we received a subpoena from the U.S. Department of Justice requiring us to provide the Department of Justice with certain information relating to Actimmune, including information
regarding the promotion and marketing of Actimmune. On October 25, 2006, we reached a comprehensive settlement with the government to resolve all claims without criminal sanctions relating to promotional activities for Actimmune for IPF by
our former employees during a period ending in June 2003. As part of this comprehensive settlement, we entered into a Civil Settlement Agreement with the United States Department of Justice and the United States Attorneys Office for the
Northern District of California. In addition, we entered into a Deferred Prosecution Agreement with the United States Attorneys Office for the Northern District of California and a Corporate Integrity Agreement with the Office of the
Inspector General of the United States Department of Health and Human Services.



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Under the terms of the Civil Settlement Agreement, we agreed to pay $36.9 million plus 5%
interest on the then outstanding principal balance to the government over a period of five years, an amount to be shared between the Federal and participating State governments as per the agreement and the Medicaid Program. In October 2008, we
entered into settlement and release agreements with the majority of the participating State governments pursuant to which the State portion of the aforementioned $36.9 million was distributed among such participating State governments. As a result
of our payment in February 2010, we have made all required payments to the Department of Justice under the terms of the Civil Settlement Agreement.

Under the terms of the Deferred Prosecution Agreement, the United States Attorneys Office for the Northern District of California filed an Information charging us with one count of off-label
promotion of Actimmune for use with IPF, but will defer prosecution of such charge during the two year term of the Deferred Prosecution Agreement. The two year term of such agreement expired December 2008 and the Information filed against us has
since been dismissed.

Under the terms of the Corporate Integrity Agreement, the Office of the Inspector General of the United
States Department of Health and Human Services agreed to waive any potential exclusion of us from participation in federal health care programs provided that we comply with the terms of the Corporate Integrity Agreement for a period of five
years. As part of the agreement, we agreed to retain an independent review organization to conduct periodic reviews of our promotional processes and policies as well as reviews of certain medical affairs group records. Effective
October 29, 2010, the Office of the Inspector General of the United States Department of Health and Human Services agreed to suspend further enforcement of the Corporate Integrity Agreement upon the declaration by InterMune that
(a) Actimmune is InterMunes only FDA-approved product, (b) InterMune currently has no US-based sales force and does not actively market Actimmune for any indication, and (c) between June 1, 2009 and October 10, 2011,
InterMunes Medical Affairs department received an insufficient number of inquiries regarding the use of Actimmune in IPF to conduct the internal and external audit as anticipated in the Corporate Integrity Agreement. InterMune and the Office
of the Inspector General of the United States Department of Health and Human Services further agreed that should InterMune engage in any US marketing activities (other than with regard to sales of Actimmune for its on-label indications of chronic
granulomatous disease and severe malignant osteopetrosis), the Office of the Inspector General of the United States Department of Health and Human Services shall have the right, upon written notice to InterMune, to cancel the suspension and
reinstate enforcement of the Corporate Integrity Agreement through its expiration date of October 26, 2011.

Indemnity Agreement

On or about March 22, 2000, the Company entered into an Indemnity Agreement with W. Scott Harkonen M.D., who served as the Companys chief executive officer until June 30, 2003. The
Indemnity Agreement obligates the Company to hold harmless and indemnify Dr. Harkonen against expenses (including attorneys fees), witness fees, damages, judgments, fines and amounts paid in settlement and any other amounts
Dr. Harkonen becomes legally obligated to pay because of any claim or claims made against him in connection with any threatened, pending or completed action, suit or proceeding, whether civil, criminal, arbitrational, administrative or
investigative, to which Dr. Harkonen is a party by reason of the fact that he was a director, officer, employee or other agent of the Company. The Indemnity Agreement establishes exceptions to the Companys indemnification obligation,
including but not limited to claims on account of [Dr. Harkonens] conduct that is established by a final judgment as knowingly fraudulent or deliberately dishonest or that constituted willful misconduct, claims on account of
[Dr. Harkonens] conduct that is established by a final judgment as constituting a breach of [Dr. Harkonens] duty of loyalty to the Corporation or resulting in any personal profit or advantage to which [Dr. Harkonen] was not legally
entitled, and claims for which payment is actually made to [Dr. Harkonen] under a valid and collectible insurance policy. The Indemnity Agreement, however, obligates the Company to advance all expenses, including attorneys
fees, incurred by Dr. Harkonen in connection with such proceedings, subject to an undertaking by Dr. Harkonen to repay said amounts if it shall be determined ultimately that he is not entitled to be indemnified by the Company.

Dr. Harkonen has been named as a defendant in the civil action lawsuits described above. Dr. Harkonen also was a target of the
investigation by the U.S. Department of Justice regarding the promotion and marketing of Actimmune. On March 18, 2008, a federal grand jury indicted Dr. Harkonen on two felony counts related to alleged improper promotion and marketing of
Actimmune during the time Dr. Harkonen was employed by the Company. Trial in the criminal case (the Criminal Action) resulted in a jury verdict on September 29, 2009, finding Dr. Harkonen guilty of one count of wire fraud
related to a press release issued on August 28, 2002, and acquitting him of a second count of a misbranding charge brought under the Federal Food, Drug, and Cosmetic Act. Dr. Harkonen has filed a motion for a new trial, which is scheduled
to be heard by the Court on March 14, 2011. The Company understands that, if that motion is denied, Dr. Harkonen intends to appeal the jurys guilty verdict.

Prior to December 2008, insurers that issued directors & officers (D&O) liability insurance to the Company had advanced all of Dr. Harkonens expenses, including
attorneys fees, incurred in the civil action lawsuits and Criminal Action. Those insurers included



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National Union Fire Insurance Company of Pittsburgh, PA (AIG), Underwriters at Lloyds, London (Lloyds), and Continental Casualty Company (CNA). On
November 19, 2008, however, the insurer that issued a $5 million D&O insurance policy providing coverage excess of the monetary limits of coverage provided by AIG, Lloyds and CNA, Arch Specialty Insurance Company (Arch),
advised the Company that the limits of the underlying coverage were expected to be depleted by approximately December 15, 2008; that Arch disclaims coverage based on misstatements and misrepresentations allegedly made by
Dr. Harkonen in documents provided in the application for the Arch policy and the underlying Lloyds policy; and, based on that disclaimer, Arch would not be advancing any of Dr. Harkonens expenses, including attorneys
fees, incurred in the civil action lawsuits and Criminal Action.

As a result of Archs disclaimer of coverage and
refusal to advance expenses, including attorneys fees, the Company had, as of approximately December 15, 2008, become obligated to advance such expenses incurred by Dr. Harkonen in the civil action lawsuits and Criminal Action.

On January 13, 2009, the Company submitted to the American Arbitration Association (AAA) a Demand for
Arbitration, InterMune, Inc. v. Arch Specialty Insurance Co., No. 74 194 01128 08 JEMO. Dr. Harkonen also is a party to the Arbitration. The Demand for Arbitration sought an award compelling Arch to advance Dr. Harkonens legal
fees and costs incurred in the civil action lawsuits and the and Criminal Action, and to advance other former officers legal fees and costs incurred in relation to the Department of Justice investigation.

The matter was heard by the arbitration panel and on May 29, 2009, the arbitration panel issued an Interim Arbitration Award
granting the Companys request for a partial award requiring Arch to advance Dr. Harkonens legal fees and costs incurred in the civil action lawsuits and Criminal Action. Arch subsequently advanced such fees and costs, including fees
and costs previously paid by the Company. The question whether Arch ultimately will be required to cover the advanced fees and costs or, instead, may recoup those fees and costs as not covered by its policy, has not been determined. Unless and until
the arbitration panel rules that such fees and costs are not covered, Arch remains obligated to advance such fees and costs. The Company believes that the jury verdict in the Criminal Action does not constitute a final judgment as defined by the
D&O liability insurance policy, and therefore does not alter the current situation with respect to this arbitration or the application of the D&O liability insurance in general.

In late 2009, Arch advised the Company that Arch had exhausted the $5.0 million limit of liability of the Arch D&O insurance policy,
and that defense cost invoices submitted to Arch collectively exceed the Arch policys limit. The Company therefore advised the insurer that issued a $5.0 million D&O insurance policy providing coverage excess of the monetary limits of
coverage provided by Arch, Old Republic Insurance Company (Old Republic), that the limits of the underlying coverage had been depleted, and the Company submitted invoices for legal services rendered on behalf of Dr. Harkonen and
other individuals who were targets of the U.S. Department of Justices investigation to Old Republic for payment. Old Republic agreed to advance Dr. Harkonens legal fees and costs incurred in the civil action lawsuits and Criminal
Action, but declined to reimburse the Company for payments made on behalf of other individuals who were targets of the U.S. Department of Justices investigation. In mid-2010, Old Republic advised the Company that Dr. Harkonens
defense fees and costs had exhausted the $5 million limit of the Old Republic insurance policy as of the second quarter of 2010. There is no additional insurance coverage available to cover the cost of Dr. Harkonens continuing defense.
Defense fees and costs incurred over and above this final $5 million of insurance coverage therefore are, in the absence of any available insurance, to be advanced by the Company pursuant to the terms of the Indemnity Agreement. We expect amounts to
be advanced by the Company to continue into the future until the Criminal Action is finally adjudicated, however we are unable to predict what our total liability could be with any degree of certainty.

On April 14, 2010, the American Arbitration Association asked the parties to the insurance arbitration to report on the status of
the case. Arch Insurance Company responded, stating that it intends to seek to recover from Dr. Harkonen and the Company the $5 million Arch advanced toward Dr. Harkonens defense costs. Arch subsequently indicated that it intended to
contend that, once a judgment is entered against Dr. Harkonen, both he and the Company would be collaterally estopped with respect to Archs claim that Dr. Harkonen knowingly made certain misrepresentations at the time he executed a
warranty in the course of applying for the Arch insurance and, therefore, that Arch may obtain an award ordering Dr. Harkonen and the Company to repay the $5 million advanced by Arch on the basis of such judgment. Dr. Harkonen and the
Company strongly disagree with Archs contention.

On December 15, 2010, the arbitration panel issued an Order
stating that while the arbitrators agree that the judgment of conviction would have some collateral estoppel effect, the issue remains whether the judgment has necessarily determined the facts establishing that Dr. Harkonen knew that his
conduct could give rise to a claim that would exceed $20 million and, consequently, impact Archs layer of coverage or, alternatively, whether the Panel must hold an evidentiary hearing on that question in order to determine whether there has
been a breach of warranty that would nullify all [of Archs] coverage and require a refund of all defense costs previously paid by Arch.



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The arbitration panel deferred addressing that question until the completion of
Dr. Harkonens sentencing. The parties are to file simultaneous memoranda within 15 days of sentencing advising the panel of the District Courts action and any findings bearing on this question, and addressing the issue of the
collateral estoppel consequences, if any, of the District Courts action relating to sentencing and sentence enhancement.

The Company believes no change to the status of the interim Arbitration Award has occurred solely due to a jury verdict, therefore the
Company has not recorded any accrued liabilities associated with this matter.

ITEM 4. (Removed and Reserved)

PART II



|ITEM 5. | MARKET FOR REGISTRANTS COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
|------- | ------------------------------------------------------------------------------------------------------------

Since the initial public offering of our common stock, $0.001 par value, on March 24, 2000, our common stock has traded on the
NASDAQ Global Select Market under the symbol ITMN.

The following table sets forth the high and low closing sales
prices of our common stock, as reported on the NASDAQ Global Select Market for the fiscal periods indicated:



|               |  |      |       |  |     |   |       | 
|-------------- |  | ---- | ----- |  | --- | - | ----- | 
|Fiscal Year:   |  | High |       |  | Low |  
|2010           |  |      |       |  |     |   |       | 
|First Quarter  |  | $    | 47.25 |  |     | $ | 13.45 | 
|Second Quarter |  |      | 48.14 |  |     |   | 8.58  | 
|Third Quarter  |  |      | 13.62 |  |     |   | 8.64  | 
|Fourth Quarter |  |      | 38.05 |  |     |   | 12.53 | 
|2009           |  |      |       |  |     |   |       | 
|First Quarter  |  | $    | 18.75 |  |     | $ | 8.67  | 
|Second Quarter |  |      | 17.05 |  |     |   | 10.75 | 
|Third Quarter  |  |      | 17.31 |  |     |   | 13.82 | 
|Fourth Quarter |  |      | 15.03 |  |     |   | 10.51 | 

As of March 1,
2011, we had 188 stockholders of record. In addition, we believe that a significant number of beneficial owners of our common stock hold their shares in street name.

Dividend Policy

We have never declared or paid any dividends on our
capital stock. We currently intend to retain all of our future earnings, if any, to finance our operations and do not anticipate paying any cash dividends on our capital stock in the foreseeable future.

Performance Graph

We
show below the cumulative total return to our stockholders during the period from December 31, 2005 through December 31, 2010 in comparison to the cumulative return on the NASDAQ Composite and the AMEX Biotechnology Index during that same
period. The results assume that $100 was invested on December 31, 2005.



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LOGO



|                         |  |             |     |  |                           |   |        |      |  |   |        |  |  |      |       |  |      |   |        |  |  |   |        | 
|------------------------ |  | ----------- | --- |  | ------------------------- | - | ------ | ---- |  | - | ------ |  |  | ---- | ----- |  | ---- | - | ------ |  |  | - | ------ | 
|                         |  | Base period |     |  |                           |   |        |      |  |   |        |  |  |      |       |  |      |  
|                         |  | December    |     |  | Years Ending December 31, |  
|Company/Index            |  | 2005        |     |  | 2006                      |   |        | 2007 |  |   | 2008   |  |  | 2009 |       |  | 2010 |  
|InterMune, Inc.          |  |             | 100 |  |                           | $ | 183.04 |      |  | $ | 79.35  |  |  | $    | 62.98 |  |      | $ | 77.62  |  |  | $ | 216.67 | 
|NASDAQ Composite         |  |             | 100 |  |                           |   | 111.74 |      |  |   | 124.67 |  |  |      | 73.77 |  |      |   | 107.12 |  |  |   | 125.93 | 
|AMEX Biotechnology Index |  |             | 100 |  |                           |   | 110.77 |      |  |   | 115.51 |  |  |      | 95.04 |  |      |   | 138.36 |  |  |   | 190.57 | 

The information under
Performance Graph is not soliciting material, is not deemed filed with the Securities and Exchange Commission and is not to be incorporated by reference in any filing of InterMune, Inc. under the Securities Act of 1933, as amended, or
the Securities Exchange Act of 1934, as amended, whether made before or after the filing date of this 10-K and irrespective of any general incorporation language in those filings.

ITEM 6.SELECTED FINANCIAL DATA

The selected consolidated financial data that appears below has been derived from our audited consolidated financial statements. This historical data should be read in conjunction with our Consolidated
Financial Statements and the related Notes to Consolidated Financial Statements contained in this Report, and with the Managements Discussion and Analysis of Financial Condition and Results of Operations in Item 7 of this
Report. The selected consolidated statement of operations data for each of the three years in the period ended December 31, 2010, 2009 and 2008 and the selected consolidated balance sheet data as of December 31, 2010 and 2009 are derived
from the audited consolidated financial statements included elsewhere in this Report. The selected consolidated statement of operations data for the years ended December 31, 2007 and 2006 and the selected consolidated balance sheet data as of
December 31, 2008, 2007 and 2006 are derived from audited financial statements not included in this Report.

In December
2005, we sold our Infergen product, including related intellectual property rights and inventory, to Valeant. The operating results of our Infergen activities, which include allocations of research and development and selling, general and
administrative expenses, have been reclassified as discontinued operations for all periods presented.



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|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|------------------------------------------------------------ |  | ------------------------------------- | ------- | - | ---- | - | -------- | ------- |  | - | -------- | - |  | ------- | -------- | - |  | - | -------- | -
|                                                             |  | Year Ended December 31,               |        
|                                                             |  | 2010                                  |         |   | 2009 |   |          | 2008(1) |  |   | 2007(1)  |   |  | 2006(1) |         
|                                                             |  | (In thousands, except per share data) |        
|Statement of Operations Data:                                |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Revenue, net:                                                |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Actimmune                                                    |  | $                                     | 20,040  |   |      | $ | 25,428   |         |  | $ | 29,880   |   |  | $       | 53,420   |   |  | $ | 90,317   |  
|Collaboration revenue                                        |  |                                       | 239,251 |   |      |   | 23,272   |         |  |   | 18,272   |   |  |         | 13,272   |   |  |   | 467      |  
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Total revenue, net                                           |  |                                       | 259,291 |   |      |   | 48,700   |         |  |   | 48,152   |   |  |         | 66,692   |   |  |   | 90,784   |  
|Costs and expenses:                                          |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Cost of goods sold                                           |  |                                       | 6,337   |   |      |   | 6,997    |         |  |   | 8,989    |   |  |         | 14,109   |   |  |   | 24,608   |  
|Research and development                                     |  |                                       | 67,470  |   |      |   | 89,138   |         |  |   | 104,206  |   |  |         | 105,939  |   |  |   | 103,849  |  
|Acquired research and development and milestone payments(2)  |  |                                       |        |   |      |   | 15,250   |         |  |   |         |   |  |         | 13,725   |   |  |   |         |  
|General and administrative                                   |  |                                       | 55,505  |   |      |   | 37,461   |         |  |   | 30,635   |   |  |         | 29,577   |   |  |   | 40,372   |  
|Provision for government settlement                          |  |                                       |        |   |      |   |         |         |  |   |         |   |  |         |         |   |  |   | 36,944   |  
|Restructuring charges                                        |  |                                       | 1,300   |   |      |   | 697      |         |  |   |         |   |  |         | 10,246   |   |  |   |         |  
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Total costs and expenses                                     |  |                                       | 130,612 |   |      |   | 149,543  |         |  |   | 143,830  |   |  |         | 173,596  |   |  |   | 205,773  |  
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Income (loss) from operations                                |  |                                       | 128,679 |   |      |   | (100,843 | )       |  |   | (95,678  | ) |  |         | (106,904 | ) |  |   | (114,989 | )
|Loss on extinguishment of debt                               |  |                                       |        |   |      |   | (11,014  | )       |  |   | (1,294   | ) |  |         |         |   |  |   |         |  
|Interest income                                              |  |                                       | 571     |   |      |   | 1,727    |         |  |   | 5,616    |   |  |         | 10,699   |   |  |   | 9,512    |  
|Interest expense and other (expense) income                  |  |                                       | (6,800  | ) |      |   | (3,736   | )       |  |   | (15,243  | ) |  |         | (11,143  | ) |  |   | (10,009  | )
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Income (loss) from continuing operations before income taxes |  |                                       | 122,450 |   |      |   | (113,866 | )       |  |   | (106,599 | ) |  |         | (107,348 | ) |  |   | (115,486 | )
|Income tax expense (benefit)                                 |  |                                       | 76      |   |      |   | 2,154    |         |  |   |         |   |  |         | (2,275   | ) |  |   |         |  
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Income (loss) from continuing operations                     |  |                                       | 122,374 |   |      |   | (116,020 | )       |  |   | (106,599 | ) |  |         | (105,073 | ) |  |   | (115,486 | )
|Discontinued operations:                                     |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Income (loss) from discontinued operations                   |  |                                       |        |   |      |   |         |         |  |   | 103      |   |  |         | 4,994    |   |  |   | (1,244   | )
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Net income (loss)                                            |  | $                                     | 122,374 |   |      | $ | (116,020 | )       |  | $ | (106,496 | ) |  | $       | (100,079 | ) |  | $ | (116,730 | )
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Per common share:                                            |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Continuing operations  basic                                |  | $                                     | 2.26    |   |      | $ | (2.62    | )       |  | $ | (2.73    | ) |  | $       | (2.97    | ) |  | $ | (3.47    | )
|Discontinued operations  basic                              |  |                                       |        |   |      |   |         |         |  |   |         | * |  |         | 0.15     |   |  |   | (0.04    | )
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Net income (loss)  basic                                    |  |                                       | 2.26    |   |      |   | (2.62    | )       |  |   | (2.73    | ) |  |         | (2.82    | ) |  |   | (3.51    | )
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Continuing operations  diluted                              |  |                                       | 2.13    |   |      |   | (2.62    | )       |  |   | (2.73    | ) |  |         | (2.97    | ) |  |   | (3.47    | )
|Discontinued operations  diluted                            |  |                                       |        |   |      |   |         |         |  |   |         | * |  |         | 0.15     |   |  |   | (0.04    | )
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Net income (loss)  diluted                                  |  | $                                     | 2.13    |   |      | $ | (2.62    | )       |  | $ | (2.73    | ) |  | $       | (2.82    | ) |  | $ | (3.51    | )
|                                                             |  |                                       |         |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Shares used in computing basic net income (loss) per share   |  |                                       | 54,202  |   |      |   | 44,347   |         |  |   | 38,982   |   |  |         | 35,493   |   |  |   | 33,277   |  
|Shares used in computing diluted net income (loss) per share |  |                                       | 61,377  |   |      |   | 44,347   |         |  |   | 38,982   |   |  |         | 35,493   |   |  |   | 33,277   |  



|* | Less than $0.01 per share
|- | -------------------------



|                                                            |  |                    |          |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|----------------------------------------------------------- |  | ------------------ | -------- | - | ---- | - | -------- | ------- |  | - | -------- | - |  | ------- | -------- | - |  | - | -------- | -
|                                                            |  | As of December 31, |         
|                                                            |  | 2010               |          |   | 2009 |   |          | 2008(1) |  |   | 2007(1)  |   |  | 2006(1) |         
|                                                            |  | (In thousands)     |         
|Balance sheet data:                                         |  |                    |          |   |      |   |          |         |  |   |          |   |  |         |          |   |  |   |          |  
|Cash, cash equivalents and available-for-sale securities(3) |  | $                  | 295,073  |   |      | $ | 99,604   |         |  | $ | 154,713  |   |  | $       | 235,292  |   |  | $ | 214,549  |  
|Working capital                                             |  |                    | 231,482  |   |      |   | 59,520   |         |  |   | 96,680   |   |  |         | 214,463  |   |  |   | 201,924  |  
|Total assets                                                |  |                    | 305,147  |   |      |   | 114,727  |         |  |   | 171,810  |   |  |         | 261,233  |   |  |   | 255,988  |  
|Long-term obligations                                       |  |                    | 85,000   |   |      |   | 125,524  |         |  |   | 155,085  |   |  |         | 128,263  |   |  |   | 117,402  |  
|Accumulated deficit                                         |  |                    | (793,095 | ) |      |   | (915,469 | )       |  |   | (799,449 | ) |  |         | (692,953 | ) |  |   | (592,873 | )
|Total stockholders equity (deficit)                        |  | $                  | 149,300  |   |      | $ | (105,800 | )       |  | $ | (110,371 | ) |  | $       | 9,637    |   |  | $ | 11,205   |  



|(1) | On January 1, 2009, we adopted Financial Accounting Standards Board, Accounting Standards Codification (ASC) Topic 470 (ASC 470), formerly
APB 14-1, Accounting for Convertible Debt Instruments That May be Settled in Cash upon Conversion (Including Partial Cash Settlement).The adoption required retrospective application; therefore, our previously reported net loss for the years
ended December 31, 2008, 2007 and 2006 have been adjusted to reflect additional interest expense of $8.6 million, or $0.22 per share, $10.5 million or $0.30 per share, and $9.5 million or $0.29 per share, respectively. The retrospective
adoption of ASC 470 decreased the debt issuance costs included in other assets by an aggregate of $0.4 million, $1.2 million and $1.6 million; decreased convertible senior notes included in long-term liabilities by $14.9 million, $41.7 million and
$52.6 million; and decreased total stockholders deficit by $14.5 million, $40.5 million and $51.0 million as of December 31, 2008, 2007 and 2006, respectively.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | These charges represent acquired research and development and milestone payments for projects that were in development, had not reached technical feasibility and had no
foreseeable alternative future uses at the time of acquisition or when the milestone became payable. Please see Item 7. Managements Discussion and Analysis of Financial Condition and Results of Operations  Results of
Operations and Note 6 of the Notes to Consolidated Financial Statements.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|(3) | Includes $12.7 million and $17.5 million of non-current available-for-sale securities as of December 31, 2009 and 2008, respectively.
|--- | -------------------------------------------------------------------------------------------------------------------------------------



50



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|ITEM 7. | MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
|------- | -------------------------------------------------------------------------------------

Overview

For a concise
overview of information relating to our business, including Actimmune and our product development programs, please see the discussion in Item 1. Business  Overview.

Pirfenidone (Esbriet ®)

Pirfenidone is an orally active,
small molecule compound under development for the treatment of idiopathic pulmonary fibrosis. In March 2011, pirfenidone was granted marketing authorization for commercial use in the European Union for the treatment of mild to moderate IPF following
the adoption of a positive opinion by the CHMP of the EMA. We are currently evaluating our clinical development options to gain approval of pirfenidone for commercial use within the United States and have plans to begin a new Phase 3 clinical study
in the first half of 2011. Pirfenidone may also prove effective in multiple fibrotic indications including Hermansky-Pudlak Syndrome, a fatal, fibrotic lung disease believed to be caused by genetic factors. In vitroexperiments show that
pirfenidone inhibits collagen synthesis, down-regulates profibrotic and proinflammatory cytokines and decreases fibroblast proliferation and stimulation in response to cytokines.

To support our anticipated commercialization efforts of Esbriet in Europe, we are currently investing in the establishment of a
commercial infrastructure within the European Union, including an increase to our employee headcount in that region. On December 17, 2010, we announced several additions to our senior leadership team in support of our commercialization efforts
as well as announcing the establishment of our European headquarters in Reinach, Switzerland. In December 2010, we transferred all of our non-U.S. rights to research, develop and commercialize pirfenidone for IPF to our wholly-owned Swiss
subsidiary, InterMune International AG. Based on our current intellectual property portfolio, we expect to have exclusive rights to sell pirfenidone within the European Union through 2030.

Sale of Danoprevir Rights to Roche

In October 2006, we entered into a collaboration agreement with Roche, subsequently amended, to develop and commercialize products from our HCV protease inhibitor program, including danoprevir. Pursuant
to our collaboration with Roche, we had successfully progressed the danoprevir compound from pre-clinical testing into Phase 2b clinical development with generally positive clinical results. In October 2010, we sold our worldwide development and
commercialization rights in danoprevir to Roche for $175.0 million in cash. In connection with this transaction, the collaboration agreement that we and Roche entered into in October 2006 was terminated. Roche has agreed to reimburse us for royalty
and milestone obligations that we continue to have to Novartis Corporation and Array related to danoprevir.

Significant
License/Acquisition Agreements

We are highly dependent on technology that we have licensed or acquired from third parties.
Actimmune, which is currently our only marketed product, is subject to a license agreement with Genentech, Inc. The majority of our clinical development pipeline is also based on technology that we have licensed from third parties. Details of these
agreements can be found elsewhere in this Report under Item 1. Business  License, Collaboration and Other Agreements, Notes 6 and 7 of the Notes to Consolidated Financial Statements, and under the heading
Results of Operations below.

We paid $13.5 million in March 2009 in connection with our decision to proceed with
regulatory approval for pirfenidone and an additional $1.7 million in connection with our clinical progress of danoprevir. We may be required to make future contingent milestone payments to the owners of our licensed products or the suppliers of our
drug compounds in accordance with our license, commercialization and collaboration agreements in the aggregate amount of $62.1 million if all of the remaining milestones per the agreements are achieved. These milestones include development,
regulatory approval, commercialization and sales milestones. Of the remaining $62.1 million in aggregate milestone payments, $20.0 million in contingent payments would be made by us only if positive Phase 3 data and product approval in the United
States is achieved for pirfenidone. An additional $20.0 million is due March 2011 upon our receipt of the approval of pirfenidone by the European Union. Potential future milestone payments of $9.6 million are related to the further development of
Actimmune, for which we have no current plans, and therefore we do not expect to pay these amounts. Included in the $62.1 million in future aggregate milestone payments are aggregate milestone payments of $11.3 million payable to Array and
Novartis, of which Roche has agreed to reimburse us in connection with our sale of danoprevir to Roche.



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Issuance of Convertible Debt

In February 2004, we issued 0.25% convertible senior notes due March 1, 2011 (the 2011 Notes) in an aggregate principal amount of $170.0 million. As of March 1, 2011, the holders of
all of our then-outstanding 2011 Notes, approximately $45.0 million in aggregate principal, elected to convert the outstanding 2011 Notes into an aggregate of 2,078,561 shares of our common stock. As a result, there are no 2011 Notes that remain
outstanding and we have no further obligations under the indenture governing the 2011 Notes.

On June 24, 2008, we issued
$85.0 million in aggregate principal amount of 5.00% Convertible Senior Notes due 2015 (the 2015 Notes) to certain Holders of our then outstanding 2011 Notes in exchange for $85.0 million in aggregate principal amount of their 2011
Notes. The 2015 Notes are senior unsecured obligations of the Company and rank equally in right of payment with all of our existing and future senior debt and rank senior in right of payment to all of our existing and future subordinated debt. The
2015 Notes were exchanged by us with the Holders exclusively and solely for the 2011 Notes in a transaction exempt from registration under Section 3(a)(9) of the Securities Act of 1933, as amended.

The 2015 Notes mature on March 1, 2015 and bear interest at a rate of 5.00% per annum. The holders of the 2015 Notes may
convert their 2015 Notes into shares of our common stock at a conversion rate of 52.9661 shares per $1,000 principal amount of notes (representing a conversion price of approximately $18.88 per share), subject to adjustment. The conversion rate for
the 2015 Notes will be increased in certain circumstances that constitute a fundamental change of the Company and in connection with a withholding tax redemption. We can only settle conversion of the 2015 Notes by delivery of shares of common stock.

In April 2009, we entered into exchange agreements with certain holders of our convertible notes to issue, in the aggregate,
approximately 2.1 million shares of common stock, valued at approximately $36.1 million, in exchange for, in the aggregate, $32.3 million principal amount of the convertible notes, representing approximately 38% of the aggregate principal
outstanding of our 2011 Notes at the date of the exchanges.

In September 2009, we entered into an exchange agreement with
certain holders of our convertible notes to issue approximately 0.2 million shares of common stock, valued at approximately $4.0 million, in exchange for approximately $3.8 million principal amount of the convertible notes, representing
approximately 7% of the aggregate principal outstanding of our 2011 Notes at the date of the exchange.

Additionally, in
September 2009, we entered into exchange agreements with certain holders of our convertible notes to issue approximately 0.3 million shares of common stock, valued at approximately $4.3 million, in exchange for approximately $4.0 million
principal amount of the convertible notes, representing approximately 8% of the aggregate principal outstanding of our 2011 Notes at the date of the agreements. All of the convertible notes we acquired pursuant to the exchange agreements in
September 2009 were retired upon the closing of the exchanges in October 2009 upon completion of ten trading days of our common stock necessary to determine the final number of shares to be issued.

All of the convertible notes we acquired pursuant to the exchange agreements in April and September 2009 were retired upon the closing of
the debt exchanges.

Need for Additional Capital

We commenced operations in 1998 and have incurred significant losses to date. Our revenue has been limited primarily to sales of Actimmune, which has been declining in recent years. We expect to continue
to incur net losses in the near term as we continue our preparations for the commercial launch of pirfenidone in the European Union, including expanding our commercial infrastructure and related employee headcount, continue the development of
pirfenidone for approval in the United States, including the launch of a new Phase 3 clinical study in the first half of 2011, continue our research in the area of hepatology, and continue to grow our operational capabilities. Although we believe
that our existing cash, cash equivalents and available-for-sale securities, together with anticipated cash flows from sales of Actimmune will be sufficient to fund our operating expenses, debt obligations and capital requirements under our current
business plan through at least the next 12 months, we may continue to require substantial additional funding in the future to realize the full commercial potential of our approved products and to complete our currently contemplated research and
development activities. As a result, we may attempt to raise additional funds through equity and/or debt financings, collaborative arrangements with corporate partners or from other sources. If additional capital is not available to us or is not
available to us on terms



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that are favorable, we may be forced to curtail our research and development activities, our commercialization activities, or we may be required to cease our operations entirely.

Critical Accounting Policies

Our discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with U.S. generally accepted
accounting principles. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and
liabilities. We base our estimates on historical experience and on various other assumptions that we believe are reasonable. These estimates are the basis for our judgments about the carrying values of assets and liabilities, which in turn may
impact our reported revenue and expenses. We have discussed the development, selection and disclosure of these estimates with the Audit Committee of our board of directors. Actual results may differ from these estimates under different assumptions
or conditions.

An accounting policy is deemed to be critical if it requires an accounting estimate to be made based on
assumptions about matters that are highly uncertain at the time the estimate is made, and if different estimates that reasonably could have been used, or changes in the accounting estimate that are reasonably likely to occur periodically, could
materially change the financial statements. We believe that the following critical accounting policies affect our more significant judgments and estimates used in the preparation of our consolidated financial statements.

Convertible Debt

On January 1, 2009, we adopted Financial Accounting Standards Board, Accounting Standards Codification (ASC) Topic 470 (ASC 470). ASC 470 requires the issuer of convertible
debt that may be settled in shares or cash upon conversion at their option, such as our $45.0 million 0.25% convertible senior notes due March 2011 that were outstanding as of December 31, 2010, to account for their liability and
equity components separately by bifurcating the conversion option from the debt instrument, classifying the conversion option in equity and then accreting the resulting discount on the debt as additional interest expense over the expected life of
the debt. The value assigned to the debt component is the estimated fair value, as of the issuance date, of similar debt without the conversion feature. This required management to make estimates and assumptions regarding interest rates as of the
date of original issuance, in addition to estimates and assumptions regarding interest rates as of our June 2008 debt extinguishment and the 2009 debt exchanges.

Stock-based Compensation

Beginning January 1, 2006, we account
for stock-based compensation in accordance with ASC Topic 718-10. Under the fair value recognition provisions, stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense over the
vesting period. In order to estimate the value of share-based awards, we use the Black-Scholes model, which requires the use of certain subjective assumptions. The most significant assumptions are our estimates of the expected volatility and the
expected term of the award. In addition, judgment is also required in estimating the amount of share-based awards that are expected to be forfeited. If actual results differ significantly from any of these estimates, stock-based compensation expense
and our results of operations could be materially impacted.

If all of the remaining and outstanding restricted stock awards
that were granted in the past four years beginning in 2007 became vested, we would recognize approximately $10.8 million in compensation expense over a weighted average remaining period of 1.0 year. If all of the remaining nonvested and outstanding
stock option awards that have been granted became vested, we would recognize approximately $20.2 million in compensation expense over a weighted average remaining period of 1.8 years. However, no compensation expense will be recognized for any stock
awards that do not vest.

Revenue Recognition and Revenue Reserves

Revenue on product sales is recognized when persuasive evidence of an arrangement exists, the price is fixed, and final delivery has
occurred and there is a reasonable assurance of collectibility of the amounts receivable from the customer. Therefore, revenue is generally recognized upon delivery when title passes to a credit-worthy customer. Reserves are recorded at the time
revenue is recognized for estimated returns, rebates, chargebacks and cash discounts, if applicable. We sell to a limited number of customers, mainly specialty pharmacies and distributors. We obtain written purchase authorizations from our customers
for a specified amount of product at a specified price. We are obligated to accept returns from customers if the pharmaceuticals they purchased have reached their expiration date. We have demonstrated the ability to make reasonable and reliable
estimates of product returns based on



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historical experience. Due to the nature of our business model and based on historical experience, these estimates are not highly subjective. We review all sales transactions for potential
rebates, chargebacks and discounts each month and monitor product ordering cycles and actual returns, product expiration dates and wholesale inventory levels to estimate potential product return rates. We believe that our reserves are adequate. For
each of the periods presented below, we have not made any shipments as a result of incentives and/or in excess of our customers ordinary course of business inventory levels. Specialty wholesalers maintain low inventory levels and manage their
inventory levels to optimize patient-based need (demand) and generally do not overstock Actimmune.

The tables below present
the amounts reported as revenue reductions for the periods indicated (in thousands, except percentages):



|                                                   |  |                         |        |   |      |   |        |      |  |   |        |  
|-------------------------------------------------- |  | ----------------------- | ------ | - | ---- | - | ------ | ---- |  | - | ------ | -
|                                                   |  | Year ended December 31, |       
|Reductions to Revenue                              |  | 2010                    |        |   | 2009 |   |        | 2008 | 
|Cash discounts                                     |  | $                       | 491    |   |      | $ | 507    |      |  | $ | 666    |  
|Product returns                                    |  |                         | 91     |   |      |   | 167    |      |  |   |       |  
|Chargebacks                                        |  |                         | 1,977  |   |      |   | 1,569  |      |  |   | 1,460  |  
|Medicaid rebates                                   |  |                         | 2,564  |   |      |   | 1,901  |      |  |   | 1,279  |  
|                                                   |  |                         |        |   |      |   |        |      |  |   |        |  
|Total                                              |  | $                       | 5,123  |   |      | $ | 4,144  |      |  | $ | 3,405  |  
|                                                   |  |                         |        |   |      |   |        |      |  |   |        |  
|                                                   | 
|                                                   |  | Year ended December 31, |       
|                                                   |  | 2010                    |        |   | 2009 |   |        | 2008 | 
|Gross product revenue                              |  | $                       | 25,163 |   |      | $ | 29,572 |      |  | $ | 33,285 |  
|Revenue reductions as a % of gross product revenue |  |                         |        |   |      |   |        |      |  |   |        |  
|Cash discounts                                     |  |                         | 2.0    | % |      |   | 1.7    | %    |  |   | 2.0    | %
|Product returns                                    |  |                         | 0.3    | % |      |   | 0.6    | %    |  |   |       |  
|Chargebacks                                        |  |                         | 7.9    | % |      |   | 5.3    | %    |  |   | 4.4    | %
|Medicaid rebates                                   |  |                         | 10.2   | % |      |   | 6.4    | %    |  |   | 3.8    | %
|                                                   |  |                         |        |   |      |   |        |      |  |   |        |  
|Total                                              |  |                         | 20.4   | % |      |   | 14.0   | %    |  |   | 10.2   | %
|                                                   |  |                         |        |   |      |   |        |      |  |   |        |  

In 2010, chargebacks were approximately 7.9% of gross revenue, but historically have fallen within a range
of 1.0% to 5.0% in any given year depending on the customer base. The increase in the past two years above this range is primarily attributed to the TRICARE Pharmacy Program (TRICARE) which became effective January 2008 and is
administered by the Department of Defense. Excluding TRICARE, chargebacks would have been approximately 5.1% in 2010, which would have increased reported revenue by approximately $0.7 million. In 2010, Medicaid rebates were approximately 10.2% of
gross revenue, and historically have fallen within a range of 2.0% to 6.0% in any given year. If Medicaid rebates had decreased to 4.0% during 2010, this would have increased our reported revenue by approximately $1.6 million. The ranges noted above
are based on a review of historical trends, though we believe the trend for the ranges in future periods will be modestly higher given the recent price increases described below. Chargebacks as a percentage of gross revenue have increased year over
year for the past two years due to disappointing clinical trial results and our subsequent decision to discontinue further development of Actimmune in addition to the new TRICARE program. The increase in Medicaid rebate revenue reductions from 3.8%
in 2008 and 6.4% in 2009 to 10.2% in 2010 is due to price increases for Actimmune implemented midway through 2008 and 2009 and the lack of a corresponding increase in the Medicaid reimbursement rate.

The source of information that we monitor in assisting us with computing chargebacks is from the Federal Supply Schedule, Veterans
Administration and Public Health System pricing documents. These documents establish the maximum price allowable for the sale of our product to a government customer. The chargeback amount per unit is computed as the difference between our sales
price to the wholesaler and the selling price from the wholesaler to a government customer. Chargebacks are processed directly by the wholesalers and are deducted from payments to us.

The source of information that we monitor in assisting us with computing Medicaid rebates is from each of the 50 states. Medicaid rebates
are billed directly to us from each state. Billings from the states, which are based on end user reports submitted by pharmacies to the state agencies, are typically received within 45 days after the end of each calendar quarter. We use historical
billing and payment trends to assist us in determining an estimated Medicaid rebate amount each period.



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Clinical Trial Accruals

We accrue costs for clinical trial activities performed by contract research organizations based upon the estimated amount of work
completed on each study. These estimates may or may not match the actual services performed by the organizations as determined by patient enrollment levels and related activities. We monitor patient enrollment levels and related activities to the
extent possible through internal reviews, correspondence with contract research organizations and review of contractual terms. However, if we have incomplete or inaccurate information, we may overestimate or underestimate activity levels associated
with various studies at a given point in time. In the event we underestimate, we could be required to record significant additional research and development expenses in future periods when the actual activity level becomes known. All such costs are
charged to research and development expenses as incurred. To date, we have not experienced changes in estimates that have led to material research and development expense adjustments being recorded in subsequent periods.

Inventory Reserves

Our inventories are stated at the lower of cost or market and our inventory costs are determined using the specific identification method which approximates first-in first-out. We enter into purchase
obligations to purchase our inventory based upon sales forecasts to enable us to mitigate some of the risk associated with the long lead times required to manufacture our products.

We write off the cost of inventory and reserve for future minimum purchase commitments, if any, that we consider to be in excess of
forecasted future demand. We define excess inventory as inventory that will expire before it can be sold, based on future sales forecasts. In making these assessments, we are required to make judgments as to the future demand for current or
committed inventory purchase levels. We are also required to monitor the expiration dates of our products, since our products can no longer be used after their respective expiration dates. Actimmune has an expiration date of 36 months from the
date of manufacture. As part of our on-going excess inventory assessment for Actimmune, we also estimate the expiration date of any Actimmune to be manufactured in the future.

Projected revenue trends resulted in us recording charges during 2010, 2009 and 2008 of $0.5 million, $0.3 million, and $0.7 million, respectively, to cost of goods sold for excess inventories. If
Actimmune revenue levels experienced in future periods are substantially below our current expectations, we could be required to record additional charges for excess inventories. Please refer to the statements under Item 1A. Risk
Factors in this Report to gain a better understanding of the possible reasons why actual results may differ from our estimates.

Results of Operations

Comparison of years ended December 31, 2010, 2009 and 2008

Revenue

For the year ended December 31, 2010, we recorded total net revenue of $259.3 million, compared to $48.7 million and $48.2
million for the same periods in 2009 and 2008, respectively. The substantial increase in revenue in 2010 as compared to 2009 is primarily due to the sale of our worldwide rights in danoprevir to Roche in October 2010 which resulted in the
recognition of $175.0 million in revenue from the sale proceeds along with the acceleration of $57.3 million of previously deferred revenue related to the termination of our 2006 collaboration agreement with Roche, partially offset by the continued
decline in our Actimmune product revenue and the receipt of danoprevir-related milestone payments in prior years. We reported an increase in revenue in 2009 as compared to 2008 due to our receipt of the $20.0 million milestone payment from Roche in
2009 compared with the receipt of a $15.0 million milestone payment in 2008. This increase offset the year over year decrease we reported in Actimmune product sales. The $64.3 million in collaboration revenue in 2010 includes $57.3 million
recognized in connection with the termination of our 2006 collaboration agreement with Roche, as well as approximately $4.5 million of revenue related to the new collaboration agreement we entered into with Roche in December 2010, representing
reimbursement for research services performed for Roche. The $23.3 million and $18.3 million of collaboration revenue for 2009 and 2008, includes $20.0 million and $15.0 million of milestone payments received in September 2009 and September 2008,
respectively, each of which had been assessed as substantive and at-risk at the initiation of the agreement and were therefore recognized as revenue when the milestones were achieved, as defined in the former collaboration agreement. In 2010, 2009
and 2008, respectively, collaboration revenue included approximately $2.5 million, $3.3 million and $3.3 million of amortization of the aggregate $70.0 million in upfront payments received from Roche in 2006 and 2007. For each of the years ended
December 31, 2010, 2009 and 2008, Actimmune accounted for all of our product revenue and was approximately $20.0 million, $25.4 million and $29.9 million, respectively. A significant portion of these sales were derived from physicians
prescriptions for the off-label use of Actimmune in the treatment of IPF.



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There are a number of variables that impact Actimmune revenue including, but not limited to,
the discontinuation of the Phase 3 INSPIRE clinical trial in March 2007, the level of enrollment in IPF clinical trials of other companies, new patients started on therapy, average duration of therapy, new data on Actimmune or other products
presented at medical conferences, publications in medical journals, reimbursements, and patient referrals from physicians.

Cost of Goods Sold

Cost of goods sold include product manufacturing costs, royalties and distribution costs associated with our product revenue and inventory writedowns. Cost of goods sold for the year ended
December 31, 2010 was $6.3 million, or approximately 31% of total product revenue, compared to $7.0 million and $9.0 million, or approximately 28% and 30% of total product revenue, in 2009 and 2008, respectively. The decrease in cost of
goods sold for each year over year period primarily reflects the decline in Actimmune revenue. Included in 2010, 2009 and 2008 cost of goods sold are charges of $0.5 million, $0.3 million and $0.7 million, respectively recorded for excess
inventories. Excluding the charges for excess inventory and purchase commitments in 2010, 2009 and 2008, cost of goods sold was approximately 29%, 26% and 28% of product revenue for each of the years ended December 31, 2010, 2009 and 2008,
respectively.

Exchange rate fluctuations on inventory purchases may affect cost of goods sold on Actimmune inventory
purchased from BI. In the past, we have utilized forward exchange contracts to partially offset the effect of exchange rate fluctuations, but we did not enter into any such contracts in 2010, 2009 or 2008.

Research and Development Expenses

Research and development (R&D) expenses were $67.5 million, $89.1 million and $104.2 million for the years ended December 31, 2010, 2009 and 2008, respectively, representing
decreases of 24% from 2009 to 2010 and 14% from 2008 to 2009, respectively. The decrease in 2010 as compared to 2009 is primarily due to the timing of the preparation of regulatory filings related to pirfenidone and the divestiture of danoprevir in
October 2010. The decrease in 2009 compared with 2008 is primarily attributed to completion of the CAPACITY clinical trials in early 2009, partially offset by increased expenses associated with the RECAP extension study (an extension of the
CAPACITY 1 and CAPACITY 2 clinical trials), the Phase 2b study of danoprevir in patients chronically infected with HCV and the preparation of the regulatory filings for pirfenidone.

The following table lists our current product development programs and the research and development expenses recognized in connection
with each program during the indicated periods. The category titled Programs  Non-specific is comprised of facilities and personnel costs that are not allocated to a specific development program or discontinued programs
and $3.5 million, $3.2 million and $2.6 million of stock-based compensation expense in 2010, 2009 and 2008, respectively. Our management reviews each of these program categories in evaluating our business. For a discussion of the risks and
uncertainties associated with developing our products, as well as the risks and uncertainties associated with potential commercialization of our product candidates, see the specific sections under Item 1A. Risk Factors above.



|                        |  |                         |        |  |      |   |        |      |  |   |         | 
|----------------------- |  | ----------------------- | ------ |  | ---- | - | ------ | ---- |  | - | ------- | 
|                        |  | Year ended December 31, |       
|Development Program     |  | 2010                    |        |  | 2009 |   |        | 2008 | 
|                        |  | (In thousands)          |       
|Pulmonology             |  | $                       | 32,601 |  |      | $ | 47,636 |      |  | $ | 60,266  | 
|Hepatology              |  |                         | 13,895 |  |      |   | 26,794 |      |  |   | 30,699  | 
|Programs  Non-specific |  |                         | 20,974 |  |      |   | 14,708 |      |  |   | 13,241  | 
|                        |  |                         |        |  |      |   |        |      |  |   |         | 
|Total                   |  | $                       | 67,470 |  |      | $ | 89,138 |      |  | $ | 104,206 | 
|                        |  |                         |        |  |      |   |        |      |  |   |         | 



Historically, the largest component of our total operating expense was our ongoing investment in research and development and, in particular, the clinical development of our product pipeline. The process
of conducting the clinical research necessary to obtain FDA approval is costly and time consuming. Current FDA requirements for a new human drug to be marketed in the United States include:



| |  |  | the successful conclusion of preclinical laboratory and animal tests, if appropriate, to gain preliminary information on the products safety;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the submission of an IND with the FDA to conduct human clinical trials for drugs;
| | - |  | ---------------------------------------------------------------------------------



| |  |  | the successful completion of adequate and well-controlled human clinical investigations to establish the safety and efficacy of the product for its
recommended use; and
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | the submission by a company and acceptance and approval by the FDA of an NDA or BLA for a drug product to allow commercial distribution of the drug.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------

In light of the factors mentioned above, we consider the active management and development of our clinical
pipeline to be crucial to our long-term success. The actual probability of success for each candidate and clinical program may be impacted by a variety of factors, including, among others, the quality of the candidate, the validity of the target and
disease indication, early clinical data, investment in the program, competition, manufacturing capability and commercial viability. Due to these factors, it is difficult to give accurate guidance on the anticipated proportion of our research and
development investments or the future cash inflows from these programs. In addition, due to these same factors and others, we are unable to reasonably estimate the efforts needed and, therefore, the costs we will incur to complete any of our
projects or the estimated time to complete such projects. We are also unable to provide costs incurred for specific research and development projects within each major development program as well as the cumulative costs incurred to date given that
we do not maintain specific financial records to this level of detail. However, a substantial majority of our resources have been invested in our pirfenidone and former danoprevir projects in order to advance them into Phase 3 and Phase 2 clinical
development, respectively. The remaining projects within our hepatology research programs are in the preclinical development stage and therefore do not receive a significant amount of investment.

The actual probability of success for each candidate and clinical program may be impacted by a variety of factors, including, among
others, the quality of the candidate, the validity of the target and disease indication, early clinical data, investment in the program, competition, manufacturing capability and overall safety and efficacy profile as ultimately decided upon by the
FDA. Due to these factors, we believe it is difficult to give accurate guidance on the anticipated proportion of our research and development investments or the future cash inflows from these programs. In addition, due to these same factors and
others, we are unable to reasonably estimate the efforts needed and, therefore, the costs we will incur to complete any of our projects or the estimated time to complete such projects.

Milestone Payments to Third Parties

We made no third-party payments in 2010 related to contractual milestone obligations. In 2009, we made milestone payments of approximately $15.2 million including approximately $1.7 million in milestone
payments made in connection with the initiation of the Phase 2b study of danoprevir and a $13.5 million milestone payment related to our pirfenidone program.

General and Administrative Expenses

General and administrative
(G&A) expenses were $55.5 million, $37.5 million and $30.6 million for the years ended December 31, 2010, 2009 and 2008, respectively, representing year over year increases of 48% and 22%, respectively. The increase in our
G&A expenses in 2010 and 2009 were primarily attributable to costs related to our preparation for the potential commercialization of pirfenidone, including establishment of a European infrastructure in 2010 and transaction costs associated with
the sale of danoprevir to Roche in October 2010.

Restructuring Charges

Following our receipt of the Complete Response Letter from the FDA requesting an additional clinical trial to support the efficacy of
pirfenidone, we initiated a reduction in force in May 2010 resulting in an aggregate restructuring charge of approximately $1.3 million during 2010, consisting primarily of severance and benefits payments made to terminated employees.

In connection with the completion and announcement of our CAPACITY trial results, we initiated a reduction in force in February 2009. We
incurred approximately $0.7 million of restructuring charges during 2009 consisting primarily of severance payments to terminated employees.

Loss on extinguishment of debt

On June 24, 2008, we issued $85.0
million in 2015 Notes to certain holders of our existing 2011 Notes in exchange for $85.0 million in aggregate principal amount of their 2011 Notes. Remaining debt issuance costs of approximately $1.1 million, related to the extinguishment of $85.0
million of the existing 2011 Notes, were expensed during the second quarter of 2008 and were included in the loss on extinguishment of debt in our consolidated statements of operations, see Note 12 of the Notes to Consolidated Financial Statements.



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In April and September 2009, we entered into exchange agreements with certain holders of our
2011 Notes to issue approximately 2.6 million shares of common stock in exchange for approximately $40.1 million principal amount of the 2011 Notes then outstanding, see Issuance of Convertible Debt above. The exchange agreements were
treated as induced conversions as the holders received a greater number of shares of common stock than would have been issued under the original conversion terms of the convertible notes. At the time of the exchange agreements, none of the
conversion contingencies were met. Under the original terms of the convertible notes, the amount payable on conversion was to be paid in cash, and the remaining conversion obligation (stock price in excess of conversion price) was payable in cash or
shares, at our option. Under the terms of the exchange agreements, all of the settlement was paid in shares. The difference in the value of the shares of common stock sold under the exchange agreements and the value of the shares used to derive the
amount payable under the original conversion agreements resulted in a loss on extinguishment of debt of approximately $13.2 million in the aggregate (the inducement loss). As required by ASC 470, upon derecognition of the 2011 Notes, we remeasured
the fair value of the liability and equity components using a borrowing rate for similar non-convertible debt that would be applicable to us at the date of the exchange agreements. Because borrowing rates increased, the remeasurement of the
components of the convertible notes resulted in a gain on extinguishment of approximately $2.8 million (the revaluation gain). As a result, we recognized a net loss on extinguishment of debt of approximately $11.0 million during the year ended
December 31, 2009, calculated as the inducement loss, plus an allocation of advisory fees of approximately $0.6 million; less the revaluation gain. For more information, see Note 12 of the Notes to Consolidated Financial Statements.

Interest Income

Interest income decreased to approximately $0.6 million for the year ended December 31, 2010 compared with $1.7 million for the year ended December 31, 2009 and $5.6 million for the
year ended December 31, 2008. These decreases in interest income reflect lower average cash and securities balances throughout 2010 compared to 2009 and 2008 and successively lower average interest rates in each of the years 2010, 2009 and
2008.

Interest Expense

Interest expense decreased to $8.4 million for the year ended December 31, 2010 compared to $10.1 million and $13.2 million for the years ended December 31, 2009 and 2008,
respectively. The decrease in interest expense in 2010 as compared to 2009 was primarily due to a decline in the amortization of the debt discount related to our 2011 Notes, following the reduction in our convertible note obligation in 2009, see
Issuance of Convertible Debtabove. The decrease in interest expense in 2009 as compared to 2008 was primarily due to a decline in the amortization of the debt discount resulting from the exchange of notes in 2008 and a reduction in interest
payments following the exchange of notes in April and September 2009, refer to Issuance of Convertible Debtabove. During 2010, the amortization of debt discount was approximately $3.8 million, compared to $4.6 million in 2009 and $8.6
million in 2008. Additionally, each period reflects declining interest expense recorded in connection with our liability under the government settlement reached in October 2006.

On January 1, 2009, we adopted guidance in ASC 470. As a result, we recorded additional interest expense of $4.6 million in the year
ended December 31, 2009, representing amortization of the debt discount established with our adoption of this guidance. The adoption required retrospective application, therefore, our previously reported interest expense for the year ended
December 31, 2008 was restated to reflect additional interest expense of $8.6 million.

The following table reconciles
interest expense for the year ended December 31, 2008 as previously reported with current year reported results (in thousands):



|                                                                                             |  |              |        |  
|-------------------------------------------------------------------------------------------- |  | ------------ | ------ | -
|                                                                                             |  | Year ended   |       
|                                                                                             |  | December 31, |       
|                                                                                             |  | 2008         |       
|Interest expense, as previously reported                                                     |  | $            | 5,693  |  
|Adjustments and reclassification:                                                            |  |              |        |  
|Amortization of debt discount and debt issuance costs in connection with adoption of ASC 470 |  |              | 8,576  |  
|Reclassification to loss on extinguishment of debt                                           |  |              | (1,113 | )
|                                                                                             |  |              |        |  
|Interest expense, as reported herein                                                         |  | $            | 13,156 |  
|                                                                                             |  |              |        |  



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Other Income (Expense)

Other income decreased to $1.6 million for the year ended December 31, 2010 compared to $6.4 million for the year ended
December 31, 2009 and increased from $(2.1) million of other expense in 2008. Other income in 2010 is comprised primarily of realized gains of approximately $1.1 million from the sale of all of our remaining auction rate securities and
includes approximately $0.7 million related to the receipt of a federal research and development grant in the fourth quarter of 2010 pursuant to the Federal Qualifying Therapeutic Discovery Project (QTDP), partially offset by other
expenses. Other income in 2009 consists primarily of realized gains of approximately $6.0 million from the sale of our shares of Targanta common stock. Other expense in 2008 is comprised primarily of a $3.5 million impairment charge for the
writedown of our long-term available-for-sale auction rate securities, partially offset by a $1.0 million contingent payment in connection with our divestiture of Amphotec in May 2005.

Provision for Income Taxes

Due to our continuing operating losses and the uncertainty of our recognizing the potential future benefits from other non-operating losses, we recorded a provision of approximately $0.1 million for
income taxes for the year ended December 31, 2010. We recorded a $2.3 million deferred tax benefit in 2007, primarily related to net operating losses that we had concluded to be realizable based on our estimate of future taxable income
resulting from future potential sales of our shares of Targanta common stock, The $2.3 million tax benefit was reversed in 2009 following our sale of Targanta shares in 2009. As of December 31, 2010, we had federal net operating loss
carryforwards of approximately $221.3 million. The net operating loss carryforwards will expire at various dates beginning in 2025 if not utilized. We also have federal research and development tax credits of approximately $9.1 million
that will begin to expire in the year 2020 and federal Orphan Drug credit carryforwards of approximately $93.4 million that will begin to expire in the year 2022. In addition, we had net operating loss carryforwards for state income tax purposes of
approximately $290.5 million that begin to expire in 2015 and state research and development tax credits of approximately $8.5 million that do not expire. In general, Section 382 of the Internal Revenue Code (IRC) of 1986,
as amended, imposes annual limitations on the utilization of net operating loss carryforwards, other tax carryforwards and certain built-in losses, as defined under that Section, upon an ownership change. We have analyzed our historical ownership
changes and removed any net operating loss carryforwards that will expire unutilized from our deferred tax balances as a result of IRC Section 382 limitations. During 2010, we utilized some of our net operating loss carryforwards and credits to
reduce our current provision for income taxes.

In accordance with ASC 810-10-45-8, we recorded a deferred
charge during the year ended December 31, 2010 related to the deferral of income tax expense on inter-company profits that resulted from the sale of our non-U.S. economic rights to Esbriet® to InterMune International AG, a wholly owned subsidiary formed in 2010. The deferred charge of approximately $0.3 million is included in other assets in the
accompanying consolidated balance sheets and will be amortized as a component of income tax expense in the accompanying consolidated statements of operations over the estimated life of the intellectual property.

We adopted the provisions of ASC Topic No. 740, previously referred to as FASB Interpretation No. 48, Accounting for
Uncertainty in Income Taxesan interpretation of FASB Statement No. 109 on January 1, 2007. Implementation of ASC Topic No. 740 did not result in any adjustment to our Consolidated Statements of Operations or a cumulative
adjustment to accumulated deficit.

Income from Discontinued Operations

Income from discontinued operations in 2008 was related to the divestiture of our former Infergen product line to Valeant Pharmaceuticals
International in December 2005. We recorded income from discontinued operations of approximately $0.1 million for the year ended December 31, 2008 resulting from an adjustment to our previous estimate of product returns related to the
Infergen product line.

Liquidity and Capital Resources

At December 31, 2010, we had cash, cash equivalents and available-for-sale securities of $295.1 million compared to
$99.6 million at December 31, 2009. The increase was primarily due to net proceeds of $106.8 million from our public offering of equity in January 2010 along with the receipt of $175.0 million from the sale of our worldwide rights in
danoprevir to Roche in October 2010, partially offset by the use of cash for our operations as well as a payment of approximately $9.2 million to pay our remaining obligation to the Department of Justice under the terms of the Civil Settlement
Agreement. We believe that our cash, cash equivalents and available-for-sale securities as of December 31, 2010 are sufficient to fund our operations, as currently contemplated, at least to the end of 2011. Some of these available cash and cash
equivalents are held in accounts managed by third party financial institutions and consist of invested cash and cash in our core operating accounts. The invested cash is invested in interest bearing



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funds managed by third party financial institutions. We can provide no assurances that access to our invested cash and cash equivalents will not be impacted by adverse conditions in the financial
markets. In addition, at any point in time we could have balances that exceed the Federal Deposit Insurance Corporation insurance limits. While we monitor the cash balances in our operating accounts on a regular basis, these cash balances could be
impacted and we may be unable to access our cash if the underlying financial institutions fail or if we become subject to other adverse conditions in the financial markets. To date we have not experienced a lack of access to cash in any of our third
party financial institution accounts.

The primary objective of our investment activities is to preserve principal while at
the same time maximizing yields without significantly increasing risk. To achieve this objective, we invest our excess cash in debt instruments of the U.S. federal and state governments and their agencies and high-quality corporate issuers,
and, by policy, restrict our exposure by imposing concentration limits and credit worthiness requirements for all corporate issuers. Beginning in February 2008, auctions failed for our entire portfolio of auction rate securities which had
substantially limited the liquidity of those instruments. However, in 2010, we sold or redeemed our remaining portfolio of auction rate securities.

Operating Activities

Cash provided by operating activities was
approximately $72.3 million during the year ended December 31, 2010, primarily resulting from our sale of danoprevir to Roche along with our realized collaboration and product sales revenues less expenses related to our cost of goods sold and
cost of operations, described more fully above under the section heading, Results of Operations, and less changes in our working capital. Significant changes in working capital consisted of decreases in accounts receivable, product inventory,
accounts payable, accrued compensation, and other accrued liabilities, including full payment of our liability under the government settlement of approximately $9.2 million in 2010.

Investing Activities

Investing activities consumed approximately $102.8 million in cash flow during the year ended December 31, 2010, primarily due to purchases of investments totaling $301.5 million, partially
offset by maturities and sales of available-for-sale securities totaling $199.1 million.

Financing Activities

Cash provided by financing activities of approximately $124.0 million for the year ended December 31, 2010 was
due to the receipt of $106.8 million in net proceeds from our public offering of equity in January 2010 along with proceeds from the exercise of employee stock options and purchases of common stock under our employee stock purchase plan of
approximately $17.2 million.

We expect to incur net losses in the near term as we continue our preparations for the
commercial launch of Esbriet in the European Union, continue the development of pirfenidone for approval in the United States, including the launch of a new Phase 3 clinical study in the first half of 2011, continue our research in the area of
hepatology, and continue to grow our operational capabilities. We believe that our existing cash, cash equivalents and available-for-sale securities, together with anticipated cash flows from sales of Actimmune will be sufficient to fund our
operating expenses, debt obligations and capital requirements under our current business plan through at least the next 12 months. This forward-looking statement involves risks and uncertainties, and actual results could vary as a result of a number
of factors, including the factors discussed under Item 1A. Risk Factors. This forward-looking statement is also based upon our current plans and assumptions, which may change, and our capital requirements, which may increase in
future periods. Our future capital requirements will depend on many factors, including, but not limited to:



| |  |  | capital requirements related to our preparations for the commercial launch of Esbriet in the European Union, including the expansion of our commercial
infrastructure and related personnel and facility expenses;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the timing and financial requirements of the launch of a Phase 3 clinical study of pirfenidone in the U.S.;
| | - |  | -----------------------------------------------------------------------------------------------------------



| |  |  | sales of Actimmune or any of our product candidates in development that receive commercial approval;
| | - |  | ----------------------------------------------------------------------------------------------------



| |  |  | our ability to partner our programs or products;
| | - |  | ------------------------------------------------



| |  |  | the progress of our research and development efforts;
| | - |  | -----------------------------------------------------



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| |  |  | the scope and results of preclinical studies and clinical trials;
| | - |  | -----------------------------------------------------------------



| |  |  | the costs, timing and outcome of regulatory reviews;
| | - |  | ----------------------------------------------------



| |  |  | determinations as to the commercial potential of our product candidates in development;
| | - |  | ---------------------------------------------------------------------------------------



| |  |  | the pace of expansion of administrative expenses;
| | - |  | -------------------------------------------------



| |  |  | the status of competitive products and competitive barriers to entry;
| | - |  | ---------------------------------------------------------------------



| |  |  | the establishment and maintenance of manufacturing capacity through third-party manufacturing agreements;
| | - |  | ---------------------------------------------------------------------------------------------------------



| |  |  | the establishment of collaborative relationships with other companies;
| | - |  | ----------------------------------------------------------------------



| |  |  | the payments of annual interest on our long-term debt; and
| | - |  | ----------------------------------------------------------



| |  |  | the timing and size of the payments we may receive from our collaboration agreements.
| | - |  | -------------------------------------------------------------------------------------

As a result, we may require substantial additional capital and may attempt to raise additional funds through equity or debt financings,
collaborative arrangements with corporate partners or from other sources. We have no commitments for such fund raising activities at this time. Furthermore, additional funding may not be available to finance our operations when needed or, if
available, the terms for obtaining such funds may not be favorable or may result in dilution to our stockholders.

Off-Balance Sheet
Arrangements

With the exception of standard operating leases, we have not engaged in any off-balance sheet arrangements,
including the use of structured finance, special purpose entities or variable interest entities.

Contractual Obligations

Contractual obligations represent future cash commitments and liabilities under agreements with third parties, and exclude contingent
liabilities, such as milestone payments, for which we cannot reasonably predict future payments. The following chart represents our contractual obligations as of December 31, 2010, aggregated by type (in millions):



|                                               |  |       |       |  |      |   |      |           |  |   |           |  |  |            |      |  |  |   |     | 
|---------------------------------------------- |  | ----- | ----- |  | ---- | - | ---- | --------- |  | - | --------- |  |  | ---------- | ---- |  |  | - | --- | 
|Contractual Obligations                        |  | Total |       |  | 2011 |   |      | 2012-2013 |  |   | 2014-2015 |  |  | After 2015 |     
|Long-term debt obligations(1)                  |  | $     | 149.1 |  |      | $ | 49.3 |           |  | $ | 8.5       |  |  | $          | 91.3 |  |  | $ |    | 
|Operating leases                               |  |       | 10.5  |  |      |   | 2.8  |           |  |   | 3.4       |  |  |            | 3.7  |  |  |   | 0.6 | 
|Non-cancelable purchase obligations  Other(2) |  |       | 5.9   |  |      |   | 5.1  |           |  |   | 0.8       |  |  |            |     |  |  |   |    | 
|Research and development commitments(3)        |  |       | 10.2  |  |      |   | 8.2  |           |  |   | 2.0       |  |  |            |     |  |  |   |    | 
|                                               |  |       |       |  |      |   |      |           |  |   |           |  |  |            |      |  |  |   |     | 
|Total contractual cash obligations(4)          |  | $     | 175.7 |  |      | $ | 65.4 |           |  | $ | 14.7      |  |  | $          | 95.0 |  |  | $ | 0.6 | 
|                                               |  |       |       |  |      |   |      |           |  |   |           |  |  |            |      |  |  |   |     | 



|(1) | These amounts include accrued interest and principal amounts of both the 0.25% convertible senior notes due 2011 and the 5.00% convertible senior notes due 2015.
Effective March 1, 2011, $45.0 million of notes due 2011 were converted to common stock.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | These amounts consist of clinical related obligations and inventory purchase commitments.
|--- | -----------------------------------------------------------------------------------------

|(3) | These amounts consist of clinical, process development and other related obligations and are cancelable upon discontinuation of the trial.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------

|(4) | We may also be required to make contingent milestone payments in the aggregate of up to $62.1 million to the licensors of certain of our licensed products or the
suppliers of our drug compounds in accordance with the specific license, commercialization and collaboration agreements if all of the milestones per the agreements are achieved, which include development and regulatory approval milestones. These
amounts are not included in the above table. Included in the $62.1 million in future aggregate milestone payments are aggregate milestone payments of $11.3 million payable to Array and Novartis, of which Roche has agreed to reimburse us in
connection with our sale of danoprevir to Roche.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The operating leases for our facilities require letters of
credit secured by a restricted cash balance with our bank. The amount of each letter of credit approximates six to twelve months of operating rent payable to the landlord of each facility.



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Recent Accounting Pronouncements

In September 2009, the FASB issued Update No. 2009-13, Multiple-Deliverable Revenue Arrangementsa consensus of the FASB
Emerging Issues Task Force (ASU 2009-13). It updates the existing multiple-element revenue arrangements guidance currently included under ASC 605-25, which originated primarily from the guidance in EITF Issue No. 00-21, Revenue
Arrangements with Multiple Deliverables (EITF 00-21). The revised guidance primarily provides two significant changes: 1) eliminates the need for objective and reliable evidence of the fair value for the undelivered element in order for a
delivered item to be treated as a separate unit of accounting, and 2) eliminates the residual method to allocate the arrangement consideration. In addition, the guidance also expands the disclosure requirements for revenue recognition. ASU 2009-13
will be effective for the first annual reporting period beginning on or after June 15, 2010, with early adoption permitted provided that the revised guidance is retroactively applied to the beginning of the year of adoption. We believe that the
adoption of this update will not have a material impact on our consolidated financial statements.

In April 2010, the FASB
issued Update No. 2010-17, Milestone Method of Revenue Recognition  a consensus of the Emerging Issues Task Force. The objective of the update is to provide guidance on defining a milestone and determining when it may be
appropriate to apply the milestone method of revenue recognition for research or development transactions. This guidance is effective on a prospective basis for milestones achieved in fiscal years, and interim periods within those years, beginning
on or after June 15, 2010. We believe that the adoption of this update will have no material impact on our consolidated financial statements.

ITEM 7A.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate and Market Risk

The securities in our investment portfolio
are not leveraged, are classified as available-for-sale and are, due to their short-term nature, subject to minimal interest rate risk. We currently do not hedge our interest rate risk exposure. Because of the short-term maturities of our
investments, we do not believe that a change in market rates would have a significant negative impact on the value of our investment portfolio.

The primary objective of our investment activities is to preserve principal while at the same time maximizing the income we receive from our investments without significantly increasing risk. To achieve
this objective, we maintain our portfolio of cash equivalents and short-term and long-term investments in a variety of securities, including obligations of U.S. government-sponsored enterprises, municipal notes which may have an auction reset
feature, corporate notes and bonds, commercial paper, and money market funds. These securities are classified as available for sale and consequently are recorded on the balance sheet at fair value with unrealized gains or losses reported as a
separate component of accumulated other comprehensive income. Substantially all investments mature within approximately one year from the date of purchase. Our holdings of the securities of any one issuer, except obligations of U.S.
government-sponsored enterprises, do not exceed 10% of the portfolio. If interest rates rise, the market value of our investments may decline, which could result in a realized loss if we are forced to sell an investment before its scheduled
maturity. We do not utilize derivative financial instruments to manage our interest rate risks.

The table below presents the
original principal amounts and weighted-average interest rates by year of maturity for our investment portfolio as of December 31, 2010 by effective maturity (in millions, except percentages):



|                                        |  |      |       |   |      |   |      |      |  |   |      |  |  |                |   |  |       |   |      |                               |  |   |       |   |  |   |       | 
|--------------------------------------- |  | ---- | ----- | - | ---- | - | ---- | ---- |  | - | ---- |  |  | -------------- | - |  | ----- | - | ---- | ----------------------------- |  | - | ----- | - |  | - | ----- | 
|                                        |  | 2011 |       |   | 2012 |   |      | 2013 |  |   | 2014 |  |  | 2015 andbeyond |   |  | Total |   |      | Fair value
atDecember 31,2010 | 
|Assets:                                 |  |      |       |   |      |   |      |      |  |   |      |  |  |                |   |  |       |   |      |                               |  |   |       |   |  |   |       | 
|Available-for-sale securities           |  | $    | 236.6 |   |      | $ | 41.2 |      |  | $ |     |  |  | $              |  |  |       | $ |     |                               |  | $ | 277.8 |   |  | $ | 278.1 | 
|Average interest rate                   |  |      | 0.3   | % |      |   | 0.6  | %    |  |   |     |  |  |                |  |  |       |   |     |                               |  |   | 0.3   | % |  |   |      | 
|Liabilities:                            |  |      |       |   |      |   |      |      |  |   |      |  |  |                |   |  |       |   |      |                               |  |   |       |   |  |   |       | 
|0.25% convertible senior notes due 2011 |  | $    | 45.0  |   |      | $ |     |      |  | $ |     |  |  | $              |  |  |       | $ |     |                               |  | $ | 45.0  |   |  | $ | 74.1  | 
|Average interest rate                   |  |      | 0.25  | % |      |   |     |      |  |   |     |  |  |                |  |  |       |   |     |                               |  |   | 0.25  | % |  |   |      | 
|5.00% convertible senior notes due 2015 |  | $    |      |   |      | $ |     |      |  | $ |     |  |  | $              |  |  |       | $ | 85.0 |                               |  | $ | 85.0  |   |  | $ | 173.9 | 
|Average interest rate                   |  |      |      |   |      |   |     |      |  |   |     |  |  |                |  |  |       |   | 5.00 | %                             |  |   | 5.00  | % |  |   |      | 



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The table below presents the original principal amounts and weighted-average interest rates
by year of maturity for our investment portfolio as of December 31, 2009 by effective maturity (in millions, except percentages):



|                                        |  |      |      |   |      |   |      |      |  |   |      |  |  |                |   |  |       |   |      |                               |  |   |      |   |  |   |      | 
|--------------------------------------- |  | ---- | ---- | - | ---- | - | ---- | ---- |  | - | ---- |  |  | -------------- | - |  | ----- | - | ---- | ----------------------------- |  | - | ---- | - |  | - | ---- | 
|                                        |  | 2010 |      |   | 2011 |   |      | 2012 |  |   | 2013 |  |  | 2014 andbeyond |   |  | Total |   |      | Fair value
atDecember 31,2009 | 
|Assets:                                 |  |      |      |   |      |   |      |      |  |   |      |  |  |                |   |  |       |   |      |                               |  |   |      |   |  |   |      | 
|Available-for-sale securities           |  | $    | 80.9 |   |      | $ |     |      |  | $ |     |  |  | $              |  |  |       | $ | 13.2 |                               |  | $ | 94.1 |   |  | $ | 93.5 | 
|Average interest rate                   |  |      | 0.7  | % |      |   |     |      |  |   |     |  |  |                |  |  |       |   | 1.8  | %                             |  |   | 0.9  | % |  |   |     | 
|Liabilities:                            |  |      |      |   |      |   |      |      |  |   |      |  |  |                |   |  |       |   |      |                               |  |   |      |   |  |   |      | 
|0.25% convertible senior notes due 2011 |  | $    |     |   |      | $ | 45.0 |      |  | $ |     |  |  | $              |  |  |       | $ |     |                               |  | $ | 45.0 |   |  | $ | 48.9 | 
|Average interest rate                   |  |      |     |   |      |   | 0.25 | %    |  |   |     |  |  |                |  |  |       |   |     |                               |  |   | 0.25 | % |  |   |     | 
|5.00% convertible senior notes due 2015 |  | $    |     |   |      | $ |     |      |  | $ |     |  |  | $              |  |  |       | $ | 85.0 |                               |  | $ | 85.0 |   |  | $ | 83.9 | 
|Average interest rate                   |  |      |     |   |      |   |     |      |  |   |     |  |  |                |  |  |       |   | 5.00 | %                             |  |   | 5.00 | % |  |   |     | 

Foreign Currency Market Risk

We purchase commercial and clinical products from BI and settle our obligations in a foreign currency. This exposes us to
foreign currency exchange rate risk. We also have a portion of our assets invested within our wholly-owned foreign subsidiaries that exposes us to foreign currency exchange rate risk. To protect against currency exchange risks on forecasted foreign
currency cash payments for the purchases of Actimmune from BI over the next year, we have considered instituting a foreign currency cash flow hedging program. In the past, we have hedged portions of our forecasted foreign currency cash payments with
forward contracts. When the dollar strengthens significantly against the foreign currencies, the decline in the value of future foreign currency expenses is offset by losses in the value of the option or forward contracts designated as hedges.
Conversely, when the dollar weakens, the increase in the value of future foreign currency expenses is offset by gains in the value of the forward contracts. In 2004, we used foreign currency forward contracts to partially mitigate this exposure, but
have not entered into any new foreign currency forward contracts since that time. We regularly evaluate the cost-benefit of entering into such arrangements, and presently have no foreign currency hedge agreements outstanding as we believe our
exposure to currency exchange rate risk is minimal.

Global Market and Economic Conditions

In the United States, recent market and economic conditions have been challenging with tighter credit conditions and sluggish economic
growth which began in 2008. For the fiscal year ended December 31, 2010, concerns about the systemic impact of inflation, energy costs, geopolitical issues, the availability and cost of credit, the U.S. mortgage market, high unemployment and a
declining real estate market in the U.S. and added concerns fueled by the federal government interventions in the U.S. financial and credit markets have contributed to instability in both United States and international capital and credit markets
and have diminished expectations for the U.S. and global economy. These conditions, combined with volatile energy prices, declining business and consumer confidence and continued high unemployment have contributed to volatility in the markets and
have led to a broad economic slowdown.

As a result of these market conditions, the cost and availability of capital and
credit has been and may continue to be adversely affected by illiquid credit markets and wider credit spreads. If volatile and adverse market conditions continue, they may limit our ability to timely borrow or access the capital and credit markets
to meet liquidity needs, resulting in an adverse effect on our financial condition and results of operations. The economic slowdown may lead to reduced opportunities to raise sufficient additional capital to enable us to fund future operations,
which would have a negative impact on our business. In addition, the biotechnology industry has fluctuated significantly in the past and has experienced significant downturns in connection with, or in anticipation of, a deterioration in general
economic conditions and we cannot accurately predict how severe and prolonged any downturn might be.



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ITEM 8.FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA



|                                                          |  |   
|--------------------------------------------------------- |  | --
|Report of Independent Registered Public Accounting Firm   |  | 65
|Consolidated Balance Sheets                               |  | 66
|Consolidated Statements of Operations                     |  | 67
|Consolidated Statements of Stockholders Equity (Deficit) |  | 68
|Consolidated Statements of Cash Flows                     |  | 70
|Notes to Consolidated Financial Statements                |  | 71



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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Stockholders of InterMune, Inc.

We have audited the accompanying consolidated balance sheets of InterMune, Inc. as of December 31, 2010 and 2009, and the related consolidated statements of operations, stockholders equity
(deficit), and cash flows for each of the three years in the period ended December 31, 2010. Our audits also included the financial statement schedule listed in the Index at Item 15(a). These financial statements and schedule are the
responsibility of the Companys management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the
accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position
of InterMune, Inc. at December 31, 2010 and 2009, and the consolidated results of its operations and its cash flows for each of the three years in the period ended December 31, 2010, in conformity with U.S. generally accepted accounting
principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), InterMune,
Inc.s internal control over financial reporting as of December 31, 2010, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report
dated March 9, 2011 expressed an unqualified opinion thereon.



|                     
|---------------------
|/s/ Ernst & Young LLP
|                     
|Palo Alto, California
|March 9, 2011        



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INTERMUNE, INC.

CONSOLIDATED BALANCE SHEETS

(In thousands, except per share data)



|                                                                                                                                                       |  |              |          |   |      |   |          |  
|------------------------------------------------------------------------------------------------------------------------------------------------------ |  | ------------ | -------- | - | ---- | - | -------- | -
|                                                                                                                                                       |  | December 31, |         
|                                                                                                                                                       |  | 2010         |          |   | 2009 |  
|ASSETS                                                                                                                                                 |  |              |          |   |      |   |          |  
|Current assets:                                                                                                                                        |  |              |          |   |      |   |          |  
|Cash and cash equivalents                                                                                                                              |  | $            | 110,584  |   |      | $ | 17,007   |  
|Available-for-sale securities                                                                                                                          |  |              | 184,489  |   |      |   | 69,940   |  
|Accounts receivable, net of allowances of $36 and $55 at December 31, 2010 and 2009, respectively                                                      |  |              | 1,710    |   |      |   | 3,834    |  
|Inventories                                                                                                                                            |  |              | 1,151    |   |      |   | 2,571    |  
|Prepaid expenses and other current assets                                                                                                              |  |              | 3,609    |   |      |   | 3,235    |  
|                                                                                                                                                       |  |              |          |   |      |   |          |  
|Total current assets                                                                                                                                   |  |              | 301,543  |   |      |   | 96,587   |  
|Noncurrent available-for-sale securities                                                                                                               |  |              |         |   |      |   | 12,657   |  
|Property and equipment, net                                                                                                                            |  |              | 1,246    |   |      |   | 3,353    |  
|Other assets (includes restricted cash of $1,432 and $1,433 at December 31, 2010 and 2009, respectively)                                               |  |              | 2,358    |   |      |   | 2,130    |  
|                                                                                                                                                       |  |              |          |   |      |   |          |  
|Total assets                                                                                                                                           |  | $            | 305,147  |   |      | $ | 114,727  |  
|                                                                                                                                                       |  |              |          |   |      |   |          |  
|LIABILITIES AND STOCKHOLDERS EQUITY (DEFICIT)                                                                                                         |  |              |          |   |      |   |          |  
|Current liabilities:                                                                                                                                   |  |              |          |   |      |   |          |  
|Accounts payable                                                                                                                                       |  | $            | 7,994    |   |      | $ | 12,439   |  
|Accrued compensation                                                                                                                                   |  |              | 6,578    |   |      |   | 5,005    |  
|Convertible notes                                                                                                                                      |  |              | 44,300   |   |      |   |         |  
|Liability under government settlement  current portion                                                                                                |  |              |         |   |      |   | 8,620    |  
|Other accrued liabilities                                                                                                                              |  |              | 11,189   |   |      |   | 11,003   |  
|                                                                                                                                                       |  |              |          |   |      |   |          |  
|Total current liabilities                                                                                                                              |  |              | 70,061   |   |      |   | 37,067   |  
|Deferred rent                                                                                                                                          |  |              | 238      |   |      |   | 918      |  
|Deferred collaboration revenue                                                                                                                         |  |              |         |   |      |   | 56,445   |  
|Liability under government settlement  noncurrent portion                                                                                             |  |              |         |   |      |   | 573      |  
|Convertible notes                                                                                                                                      |  |              | 85,000   |   |      |   | 125,524  |  
|Other long term liabilities                                                                                                                            |  |              | 548      |   |      |   |         |  
|Commitments and contingencies                                                                                                                          |  |              |          |   |      |   |          |  
|Stockholders deficit:                                                                                                                                 |  |              |          |   |      |   |          |  
|Preferred stock, $0.001 par value; 5,000 shares authorized, no shares issued and outstanding at December 31, 2010
and 2009, respectively               |  |              |         |   |      |   |         |  
|Common stock, $0.001 par value, 100,000 shares authorized; 56,594 and 46,673 shares issued and outstanding at
December 31, 2010 and 2009, respectively |  |              | 57       |   |      |   | 47       |  
|Additional paid-in capital                                                                                                                             |  |              | 942,375  |   |      |   | 808,047  |  
|Accumulated other comprehensive (loss) income                                                                                                          |  |              | (37      | ) |      |   | 1,575    |  
|Accumulated deficit                                                                                                                                    |  |              | (793,095 | ) |      |   | (915,469 | )
|                                                                                                                                                       |  |              |          |   |      |   |          |  
|Total stockholders equity (deficit)                                                                                                                   |  |              | 149,300  |   |      |   | (105,800 | )
|                                                                                                                                                       |  |              |          |   |      |   |          |  
|Total liabilities and stockholders equity (deficit)                                                                                                   |  | $            | 305,147  |   |      | $ | 114,727  |  
|                                                                                                                                                       |  |              |          |   |      |   |          |  

See Accompanying Notes to Consolidated Financial Statements



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INTERMUNE, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS



|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|------------------------------------------------------------ |  | ---------------------------------------- | ------- | - | ---- | - | -------- | ---- |  | - | -------- | -
|                                                             |  | Year Ended December 31,                  |        
|                                                             |  | 2010                                     |         |   | 2009 |   |          | 2008 | 
|                                                             |  | (In thousands, except per share amounts) |        
|Revenue, net                                                 |  |                                          |         |   |      |   |          |      |  |   |          |  
|Actimmune                                                    |  | $                                        | 20,040  |   |      | $ | 25,428   |      |  | $ | 29,880   |  
|Collaboration revenue                                        |  |                                          | 239,251 |   |      |   | 23,272   |      |  |   | 18,272   |  
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Total revenue, net                                           |  |                                          | 259,291 |   |      |   | 48,700   |      |  |   | 48,152   |  
|Costs and expenses:                                          |  |                                          |         |   |      |   |          |      |  |   |          |  
|Cost of goods sold                                           |  |                                          | 6,337   |   |      |   | 6,997    |      |  |   | 8,989    |  
|Research and development                                     |  |                                          | 67,470  |   |      |   | 89,138   |      |  |   | 104,206  |  
|Acquired research and development and milestone expense      |  |                                          |        |   |      |   | 15,250   |      |  |   |         |  
|General and administrative                                   |  |                                          | 55,505  |   |      |   | 37,461   |      |  |   | 30,635   |  
|Restructuring charges                                        |  |                                          | 1,300   |   |      |   | 697      |      |  |   |         |  
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Total costs and expenses                                     |  |                                          | 130,612 |   |      |   | 149,543  |      |  |   | 143,830  |  
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Income (loss) from operations                                |  |                                          | 128,679 |   |      |   | (100,843 | )    |  |   | (95,678  | )
|Other income (expense):                                      |  |                                          |         |   |      |   |          |      |  |   |          |  
|Loss from extinguishment of debt                             |  |                                          |        |   |      |   | (11,014  | )    |  |   | (1,294   | )
|Interest income                                              |  |                                          | 571     |   |      |   | 1,727    |      |  |   | 5,616    |  
|Interest expense                                             |  |                                          | (8,399  | ) |      |   | (10,129  | )    |  |   | (13,156  | )
|Other income (expense)                                       |  |                                          | 1,599   |   |      |   | 6,393    |      |  |   | (2,087   | )
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Income (loss) from continuing operations before income taxes |  |                                          | 122,450 |   |      |   | (113,866 | )    |  |   | (106,599 | )
|Income tax expense, net                                      |  |                                          | 76      |   |      |   | 2,154    |      |  |   |         |  
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Income (loss) from continuing operations                     |  |                                          | 122,374 |   |      |   | (116,020 | )    |  |   | (106,599 | )
|Discontinued operations:                                     |  |                                          |         |   |      |   |          |      |  |   |          |  
|Income from discontinued operations                          |  |                                          |        |   |      |   |         |      |  |   | 103      |  
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Net income (loss)                                            |  | $                                        | 122,374 |   |      | $ | (116,020 | )    |  | $ | (106,496 | )
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Per common share:                                            |  |                                          |         |   |      |   |          |      |  |   |          |  
|Continuing operations  basic                                |  | $                                        | 2.26    |   |      | $ | (2.62    | )    |  | $ | (2.73    | )
|Discontinued operations  basic                              |  |                                          |        |   |      |   |         |      |  |   |         | *
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Net income (loss)  basic                                    |  | $                                        | 2.26    |   |      | $ | (2.62    | )    |  | $ | (2.73    | )
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Continuing operations  diluted                              |  | $                                        | 2.13    |   |      | $ | (2.62    | )    |  | $ | (2.73    | )
|Discontinued operations  diluted                            |  |                                          |        |   |      |   |         |      |  |   |         | *
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Net income (loss)  diluted                                  |  | $                                        | 2.13    |   |      | $ | (2.62    | )    |  | $ | (2.73    | )
|                                                             |  |                                          |         |   |      |   |          |      |  |   |          |  
|Shares used in computing basic net income (loss) per share   |  |                                          | 54,202  |   |      |   | 44,347   |      |  |   | 38,982   |  
|Shares used in computing diluted net income (loss) per share |  |                                          | 61,377  |   |      |   | 44,347   |      |  |   | 38,982   |  



|* | Less than $0.01 per share
|- | -------------------------

See
Accompanying Notes to Consolidated Financial Statements



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INTERMUNE, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (DEFICIT)



|                                                                                                   |  |                |        |  |            |   |    |               |  |   |               |   |  |               |        |   |                  |   |          |   |  |   |          |  
|-------------------------------------------------------------------------------------------------- |  | -------------- | ------ |  | ---------- | - | -- | ------------- |  | - | ------------- | - |  | ------------- | ------ | - | ---------------- | - | -------- | - |  | - | -------- | -
|                                                                                                   |  |                |        |  |            |   |    | Accumulated   |  |   |               |   |  |               |       
|                                                                                                   |  |                |        |  | Additional |   |    | Other         |  |   |               |   |  | Total         |       
|                                                                                                   |  | Common Stock   |        |  | Paid-In    |   |    | Comprehensive |  |   | Accumulated   |   |  | Stockholders |       
|                                                                                                   |  | Shares         |        |  | Amount     |   |    | Capital       |  |   | Income (Loss) |   |  | Deficit       |        |   | Equity (Deficit) |  
|                                                                                                   |  | (In thousands) |       
|Balances at December 31, 2007                                                                      |  |                | 39,032 |  |            | $ | 39 |               |  | $ | 698,904       |   |  | $             | 3,647  |   |                  | $ | (692,953 | ) |  | $ | 9,637    |  
|Net unrealized loss on available-for-sale securities                                               |  |                |       |  |            |   |   |               |  |   |              |   |  |               | (5,062 | ) |                  |   |         |   |  |   | (5,062   | )
|Net loss                                                                                           |  |                |       |  |            |   |   |               |  |   |              |   |  |               |       |   |                  |   | (106,496 | ) |  |   | (106,496 | )
|                                                                                                   |  |                |        |  |            |   |    |               |  |   |               |   |  |               |        |   |                  |   |          |   |  |   |          |  
|Comprehensive loss                                                                                 |  |                |        |  |            |   |    |               |  |   |               |   |  |               |        |   |                  |   |          |   |  |   | (111,558 | )
|Reacquisition of equity component in connection with exchange of 2011 Notes                        |  |                |       |  |            |   |   |               |  |   | (17,267       | ) |  |               |       |   |                  |   |         |   |  |   | (17,267  | )
|Exercise of stock options                                                                          |  |                | 90     |  |            |   |   |               |  |   | 1,081         |   |  |               |       |   |                  |   |         |   |  |   | 1,081    |  
|Stock issued under employee stock purchase plan                                                    |  |                | 71     |  |            |   |   |               |  |   | 939           |   |  |               |       |   |                  |   |         |   |  |   | 939      |  
|Issuance of restricted stock to employees, net of forfeitures                                      |  |                | 137    |  |            |   |   |               |  |   | 1,133         |   |  |               |       |   |                  |   |         |   |  |   | 1,133    |  
|Stock compensation related to employee stock benefit plans                                         |  |                |       |  |            |   |   |               |  |   | 5,664         |   |  |               |       |   |                  |   |         |   |  |   | 5,664    |  
|                                                                                                   |  |                |        |  |            |   |    |               |  |   |               |   |  |               |        |   |                  |   |          |   |  |   |          |  
|Balances at December 31, 2008                                                                      |  |                | 39,330 |  |            | $ | 39 |               |  | $ | 690,454       |   |  | $             | (1,415 | ) |                  | $ | (799,449 | ) |  | $ | (110,371 | )
|Net unrealized gain on available-for-sale securities                                               |  |                |       |  |            |   |   |               |  |   |              |   |  |               | 2,990  |   |                  |   |         |   |  |   | 2,990    |  
|Net loss                                                                                           |  |                |       |  |            |   |   |               |  |   |              |   |  |               |       |   |                  |   | (116,020 | ) |  |   | (116,020 | )
|                                                                                                   |  |                |        |  |            |   |    |               |  |   |               |   |  |               |        |   |                  |   |          |   |  |   |          |  
|Comprehensive loss                                                                                 |  |                |        |  |            |   |    |               |  |   |               |   |  |               |        |   |                  |   |          |   |  |   | (113,030 | )
|Exercise of stock options                                                                          |  |                | 99     |  |            |   |   |               |  |   | 1,199         |   |  |               |       |   |                  |   |         |   |  |   | 1,199    |  
|Stock issued under employee stock purchase plan                                                    |  |                | 71     |  |            |   |   |               |  |   | 790           |   |  |               |       |   |                  |   |         |   |  |   | 790      |  
|Issuance of common stock in a public offering at $16.35 per share, net of issuance costs of $2,365 |  |                | 4,025  |  |            |   | 4  |               |  |   | 63,440        |   |  |               |       |   |                  |   |         |   |  |   | 63,444   |  
|Issuance of common stock in exchange for convertible debt                                          |  |                | 2,633  |  |            |   | 3  |               |  |   | 44,355        |   |  |               |       |   |                  |   |         |   |  |   | 44,358   |  
|Issuance of restricted stock to employees, net of forfeitures                                      |  |                | 515    |  |            |   | 1  |               |  |   | 2,554         |   |  |               |       |   |                  |   |         |   |  |   | 2,555    |  
|Stock compensation related to employee stock benefit plans                                         |  |                |       |  |            |   |   |               |  |   | 5,255         |   |  |               |       |   |                  |   |         |   |  |   | 5,255    |  
|                                                                                                   |  |                |        |  |            |   |    |               |  |   |               |   |  |               |        |   |                  |   |          |   |  |   |          |  
|Balances at December 31, 2009                                                                      |  |                | 46,673 |  |            | $ | 47 |               |  | $ | 808,047       |   |  | $             | 1,575  |   |                  | $ | (915,469 | ) |  | $ | (105,800 | )
|Net unrealized loss on available-for-sale securities                                               |  |                |       |  |            |   |   |               |  |   |              |   |  |               | (1,609 | ) |                  |   |         |   |  |   | (1,609   | )
|Foreign currency translation adjustment                                                            |  |                |       |  |            |   |   |               |  |   |              |   |  |               | (3     | ) |                  |   |         |   |  |   | (3       | )



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|                                                                                                   |  |              |        |  |            |   |    |               |  |   |               |  |  |               |     |   |                  |   |          |   |  |   |         | 
|-------------------------------------------------------------------------------------------------- |  | ------------ | ------ |  | ---------- | - | -- | ------------- |  | - | ------------- |  |  | ------------- | --- | - | ---------------- | - | -------- | - |  | - | ------- | 
|                                                                                                   |  |              |        |  |            |   |    | Accumulated   |  |   |               |  |  |               |    
|                                                                                                   |  |              |        |  | Additional |   |    | Other         |  |   |               |  |  | Total         |    
|                                                                                                   |  | Common Stock |        |  | Paid-In    |   |    | Comprehensive |  |   | Accumulated   |  |  | Stockholders |    
|                                                                                                   |  | Shares       |        |  | Amount     |   |    | Capital       |  |   | Income (Loss) |  |  | Deficit       |     |   | Equity (Deficit) |  
|Net income                                                                                         |  |              |       |  |            |   |   |               |  |   |              |  |  |               |    |   |                  |   | 122,374  |   |  |   | 122,374 | 
|                                                                                                   |  |              |        |  |            |   |    |               |  |   |               |  |  |               |     |   |                  |   |          |   |  |   |         | 
|Comprehensive income                                                                               |  |              |        |  |            |   |    |               |  |   |               |  |  |               |     |   |                  |   |          |   |  |   | 120,762 | 
|Exercise of stock options                                                                          |  |              | 1,184  |  |            |   | 1  |               |  |   | 15,842        |  |  |               |    |   |                  |   |         |   |  |   | 15,843  | 
|Stock issued under employee stock purchase plan                                                    |  |              | 121    |  |            |   |   |               |  |   | 1,319         |  |  |               |    |   |                  |   |         |   |  |   | 1,319   | 
|Issuance of common stock in a public offering at $14.10 per share, net of issuance costs of $6,676 |  |              | 8,050  |  |            |   | 8  |               |  |   | 106,824       |  |  |               |    |   |                  |   |         |   |  |   | 106,832 | 
|Issuance of restricted stock to employees, net of forfeitures                                      |  |              | 566    |  |            |   | 1  |               |  |   | 3,021         |  |  |               |    |   |                  |   |         |   |  |   | 3,022   | 
|Stock compensation related to employee stock benefit plans                                         |  |              |       |  |            |   |   |               |  |   | 7,322         |  |  |               |    |   |                  |   |         |   |  |   | 7,322   | 
|                                                                                                   |  |              |        |  |            |   |    |               |  |   |               |  |  |               |     |   |                  |   |          |   |  |   |         | 
|Balances at December 31, 2010                                                                      |  |              | 56,594 |  |            | $ | 57 |               |  | $ | 942,375       |  |  | $             | (37 | ) |                  | $ | (793,095 | ) |  | $ | 149,300 | 
|                                                                                                   |  |              |        |  |            |   |    |               |  |   |               |  |  |               |     |   |                  |   |          |   |  |   |         | 

See Accompanying Notes to Consolidated Financial Statements



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INTERMUNE, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS



|                                                                                                   |  |                                 |          |   |      |   |          |      |  |   |          |  
|-------------------------------------------------------------------------------------------------- |  | ------------------------------- | -------- | - | ---- | - | -------- | ---- |  | - | -------- | -
|                                                                                                   |  | For the Year Ended December 31, |         
|                                                                                                   |  | 2010                            |          |   | 2009 |   |          | 2008 | 
|                                                                                                   |  | (In thousands)                  |         
|Cash flows used for operating activities:                                                          |  |                                 |          |   |      |   |          |      |  |   |          |  
|Net income (loss)                                                                                  |  | $                               | 122,374  |   |      | $ | (116,020 | )    |  | $ | (106,496 | )
|Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |                                 |          |   |      |   |          |      |  |   |          |  
|Stock-based compensation expense                                                                   |  |                                 | 10,343   |   |      |   | 7,809    |      |  |   | 6,797    |  
|Amortization of debt discount and issuance costs                                                   |  |                                 | 3,990    |   |      |   | 5,045    |      |  |   | 9,748    |  
|Depreciation expense                                                                               |  |                                 | 2,443    |   |      |   | 3,583    |      |  |   | 3,562    |  
|Loss on extinguishment of debt                                                                     |  |                                 |         |   |      |   | 10,414   |      |  |   | 1,294    |  
|Deferred taxes                                                                                     |  |                                 |         |   |      |   | 2,275    |      |  |   |         |  
|Deferred rent                                                                                      |  |                                 | (680     | ) |      |   | (508     | )    |  |   | (341     | )
|Net realized (gains) losses on sales and writedowns of available-for-sale securities               |  |                                 | (1,078   | ) |      |   | (6,736   | )    |  |   | 3,170    |  
|Changes in operating assets and liabilities:                                                       |  |                                 |          |   |      |   |          |      |  |   |          |  
|Accounts receivable                                                                                |  |                                 | 2,124    |   |      |   | (711     | )    |  |   | (6       | )
|Inventories                                                                                        |  |                                 | 1,420    |   |      |   | (1,322   | )    |  |   | 527      |  
|Prepaid expenses                                                                                   |  |                                 | (374     | ) |      |   | (40      | )    |  |   | 3,917    |  
|Other assets                                                                                       |  |                                 | (442     | ) |      |   | (49      | )    |  |   | (687     | )
|Accounts payable and accrued compensation                                                          |  |                                 | (2,324   | ) |      |   | (8,643   | )    |  |   | 11,413   |  
|Other accrued liabilities                                                                          |  |                                 | 3,458    |   |      |   | (4,993   | )    |  |   | 5,010    |  
|Liability under government settlement                                                              |  |                                 | (9,193   | ) |      |   | (14,472  | )    |  |   | (6,977   | )
|Deferred collaboration revenue                                                                     |  |                                 | (59,717  | ) |      |   | (3,272   | )    |  |   | (3,272   | )
|                                                                                                   |  |                                 |          |   |      |   |          |      |  |   |          |  
|Net cash provided by (used in) operating activities                                                |  |                                 | 72,344   |   |      |   | (127,640 | )    |  |   | (72,341  | )
|Cash flows from investing activities:                                                              |  |                                 |          |   |      |   |          |      |  |   |          |  
|Purchase of property and equipment                                                                 |  |                                 | (336     | ) |      |   | (354     | )    |  |   | (2,026   | )
|Purchases of available-for-sale securities                                                         |  |                                 | (301,475 | ) |      |   | (101,135 | )    |  |   | (119,805 | )
|Maturities of available-for-sale securities                                                        |  |                                 | 184,322  |   |      |   | 77,168   |      |  |   | 81,801   |  
|Sales of available-for-sale securities                                                             |  |                                 | 14,727   |   |      |   | 39,769   |      |  |   | 85,170   |  
|                                                                                                   |  |                                 |          |   |      |   |          |      |  |   |          |  
|Net cash (used in) provided by investing activities                                                |  |                                 | (102,762 | ) |      |   | 15,448   |      |  |   | 45,140   |  
|Cash flows from financing activities:                                                              |  |                                 |          |   |      |   |          |      |  |   |          |  
|Proceeds from issuance of common stock in a public offering, net of issuance costs                 |  |                                 | 106,832  |   |      |   | 63,444   |      |  |   |         |  
|Proceeds from issuance of common stock under employee stock benefit plans                          |  |                                 | 17,163   |   |      |   | 1,990    |      |  |   | 2,020    |  
|                                                                                                   |  |                                 |          |   |      |   |          |      |  |   |          |  
|Net cash provided by financing activities                                                          |  |                                 | 123,995  |   |      |   | 65,434   |      |  |   | 2,020    |  
|                                                                                                   |  |                                 |          |   |      |   |          |      |  |   |          |  
|Net increase (decrease) in cash and cash equivalents                                               |  |                                 | 93,577   |   |      |   | (46,758  | )    |  |   | (25,181  | )
|Cash and cash equivalents at beginning of year                                                     |  |                                 | 17,007   |   |      |   | 63,765   |      |  |   | 88,946   |  
|                                                                                                   |  |                                 |          |   |      |   |          |      |  |   |          |  
|Cash and cash equivalents at end of year                                                           |  | $                               | 110,584  |   |      | $ | 17,007   |      |  | $ | 63,765   |  
|                                                                                                   |  |                                 |          |   |      |   |          |      |  |   |          |  
|Supplemental disclosure of cash flow information:                                                  |  |                                 |          |   |      |   |          |      |  |   |          |  
|Interest paid                                                                                      |  | $                               | 4,485    |   |      | $ | 5,444    |      |  | $ | 2,877    |  
|Non-cash financing activities:                                                                     |  |                                 |          |   |      |   |          |      |  |   |          |  
|Extinguishment of debt, net of unamortized debt discount, in exchange for common stock             |  | $                               |         |   |      | $ | 34,131   |      |  | $ |         |  

See Accompanying Notes
to Consolidated Financial Statements



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InterMune, Inc.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. ORGANIZATION AND BASIS OF PRESENTATION

Overview

We are a biopharmaceutical company focused on developing and commercializing innovative therapies in pulmonology and
hepatology. Pulmonology is the field of medicine concerned with the diagnosis and treatment of lung conditions. Hepatology is the field of medicine concerned with the diagnosis and treatment of disorders of the liver. As of December 31, 2010,
we have one approved and marketed product, Actimmune, approved in the United States and numerous other countries for the treatment of chronic granulomatous disease (CGD) and severe, malignant osteopetrosis. Additionally, we have an
advanced-stage product candidate in pulmonology, pirfenidone, that we are currently preparing for commercial launch in the European Union, expected during the second half of 2011, and a hepatology portfolio of compounds that are currently in
pre-clinical research.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Principles of Consolidation

The consolidated financial statements include the accounts of InterMune and its wholly-owned subsidiaries, InterMune Canada Inc. and InterMune Ltd. (U.K.) along with our subsidiaries located in Germany,
France, Switzerland, Spain, and Italy. All inter-company balances and transactions have been eliminated. To date, InterMune Canada Inc. and InterMune Ltd. (U.K.) have been dormant with no assets, liabilities or operations.

Use of Estimates

The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets
and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates and
assumptions.

We evaluate our estimates and assumptions on an ongoing basis, including those related to our prior holdings of
auction rate securities, allowances for doubtful accounts, returns, chargebacks, cash discounts and rebates; excess/obsolete inventories; the effects of inventory purchase commitments on inventory; certain accrued clinical and preclinical expenses
and contingent liabilities; provision for income taxes and interest rates with respect to the accounting guidance for our convertible debt. We base our estimates on historical experience and on various other specific assumptions that we believe are
reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources.

Cash, Cash Equivalents and Available-For-Sale Securities

Cash and cash equivalents consist of highly liquid investments with original maturities, when purchased, of less than three months. We
classify all of our debt securities as available-for-sale. Available-for-sale securities are carried at fair value, with unrealized gains and losses, reported in accumulated other comprehensive income (loss), a separate component of
stockholders equity (deficit). We have estimated the fair value amounts by using quoted market prices or through a discounted cash flow analysis. The cost of securities sold is based on the specific identification method.

Other-than-temporary impairment. All of our available-for-sale securities are subject to a periodic impairment review. We
recognize an impairment charge when a decline in the fair value of our investments below the cost basis is judged to be other-than-temporary. Factors considered in determining whether a loss is temporary include the length of time and extent to
which the investments fair value has been less than the cost basis, the financial condition and near-term prospects of the investee, extent of the loss related to credit of the issuer, the expected cash flows from the security, our intent to
sell or hold the security and whether or not we will be required to sell the security before the recovery of its amortized cost. During the year ended December 31, 2008, we



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recorded a $3.5 million other-than-temporary impairment charge on our available-for-sale securities related to our previous auction rate security holdings.

Fair Value of Other Financial Instruments

Other financial instruments, including accounts receivable, accounts payable and accrued liabilities, are carried at historical cost, which we believe approximates fair value because of the short-term
nature of these instruments. The fair value of our $45.0 million convertible senior notes due 2011 was $74.1 million and the fair value of our $85.0 million convertible senior notes due 2015 was $173.9 million at December 31, 2010. As of
December 31, 2009, the fair value of our $45.0 million convertible senior notes due 2011 and our $85.0 million convertible senior notes due 2015 was $48.9 million and $83.9 million, respectively. For both 2010 and 2009, we determined the
fair value of the outstanding balances of our notes using readily available market information.

Inventory Valuation

Inventories are stated at the lower of cost or market. Cost is determined by the specific identification method.
Inventories were $1.2 million and $2.6 million at December 31, 2010 and December 31, 2009, respectively, and consisted solely of Actimmune finished goods.

Because of the long lead times required to manufacture Actimmune, we enter into purchase obligations to satisfy our estimated inventory requirements. We evaluate the need to provide reserves for
contractually committed future purchases of inventory that may be in excess of forecasted future demand. In making these assessments, we are required to make judgments as to the future demand for current as well as committed purchases. We are also
required to make judgments as to the expiration dates of Actimmune, since Actimmune product is not usable beyond its expiration date. As part of our excess inventory assessment for Actimmune, we also consider the expiration dates of future
manufactured quantities of Actimmune under these purchase obligations.

During the years ended December 31, 2010, 2009
and 2008 we charged $0.5 million, $0.3 million and $0.7 million, respectively, to cost of goods sold for inventory write downs resulting from the estimated excess of inventory compared to forecasted inventory requirements.

Concentration of Risks

Cash equivalents and investments are financial instruments that potentially subject us to concentration of risk to the extent recorded on the balance sheet. We have established guidelines for investing
excess cash utilizing diversification strategies and maturities that we believe maintain safety and liquidity. The primary objective of our investment activities is to preserve principal while at the same time maximizing yields without significantly
increasing risk. To achieve this objective, we invest our excess cash in debt instruments of the U.S. federal and state governments and their agencies and high-quality corporate issuers, and, by policy, restrict our exposure to any single
corporate issuer by imposing concentration limits. To reduce our exposure due to adverse shifts in interest rates we maintain investments with relatively short effective maturities.

Property and Equipment

Property and equipment are stated at cost and depreciated using the straight-line method over the estimated useful lives of the assets as follows:



|                                  |  |                
|--------------------------------- |  | ---------------
|                                  |  | Useful Lives   
|Computer and laboratory equipment |  | 3 to 5 years   
|Office furniture and fixtures     |  | 3 to 5 years   
|Leasehold improvements            |  | Length of lease

Acquired Product Rights

Initial payments for the acquisition of
products that, at the time of acquisition, are already marketed or are approved by the FDA for marketing are capitalized and amortized ratably over the estimated life of the products. At the time of acquisition, the product life is estimated based
upon the term of the agreement, the remaining patent life of the product and our assessment of future sales and profitability of the product. We assess this estimate regularly during the amortization period and adjust the asset value and/or useful
life when appropriate. Initial payments for the acquisition of products that, at the time of acquisition, are under development or are not



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approved by the FDA for marketing, have not reached technical feasibility and have no foreseeable alternative future uses are expensed as research and development costs.

Impairment of Long-Lived Assets

In accordance with ASC Topic No. 360, previously referred to as Statement of Financial Accounting Standard (SFAS) No. 144, Accounting for the Impairment or Disposal of
Long-Lived Assets, if indicators of impairment exist, we assess the recoverability of the affected long-lived assets by determining whether the carrying value of such assets can be recovered through undiscounted future operating cash flows. If
impairment is indicated, we will measure the amount of such impairment by comparing the carrying value of the asset to the present value of the expected future cash flows associated with the use of the asset. We have recognized no impairment losses
on long-lived assets during the three years ended December 31, 2010.

Revenue Recognition and Revenue Allowances

We recognize revenue from product sales generally upon delivery when title passes to a credit-worthy customer and
record provisions for estimated returns, rebates, chargebacks and cash discounts against revenue. We are obligated to accept from customers the return of pharmaceuticals that have reached their expiration date. We believe that we are able to make
reasonable and reliable estimates of product returns, rebates, chargebacks and cash discounts based on historical experience and other known or anticipated trends and factors. We review all sales transactions for potential rebates, chargebacks and
discounts each month and believe that our reserves are adequate. We include shipping and handling costs in cost of goods sold.

Our revenue arrangements with multiple elements are divided into separate units of accounting if certain criteria are met, including
whether the delivered element has stand-alone value to the customer and whether there is objective and reliable evidence of the fair value of the undelivered items. The consideration we receive is allocated among the separate units based on their
respective fair values, and the applicable revenue recognition criteria are applied to each of the separate units. Advance payments received in excess of amounts earned are classified as deferred revenue until earned.

Collaboration revenue derived from our former agreement with Roche includes upfront license fees and milestone payments. Nonrefundable
upfront license fees that require our continuing involvement in the form of research, development, or other commercialization efforts by us are recognized as revenue ratably over the estimated term of our continuing involvement. Milestone payments
received under our collaboration agreements that relate to events that are substantive and at risk at the initiation of the agreement are recognized as revenue when the milestones, as defined in each respective contract, are achieved and
collectibility of the milestone is assured.

Research and Development Expenses

Research and development (R&D) expenses include salaries, contractor and consultant fees, external clinical trial expenses
performed by contract research organizations (CRO), licensing fees, acquired intellectual property with no alternative future use and facility and administrative expense allocations. In addition, we fund R&D at research institutions
under agreements that are generally cancelable at our option. Research costs typically consist of applied research and preclinical and toxicology work. Pharmaceutical manufacturing development costs consist of product formulation, chemical analysis
and the transfer and scale-up of manufacturing at our contract manufacturers. Clinical development costs include the costs of Phase 1, Phase 2 and Phase 3 clinical trials. These costs are a significant component of our research and development
expenses.

We accrue costs for clinical trial activities performed by contract research organizations and other third parties
based upon the estimated amount of work completed on each study as provided by the CRO. These estimates may or may not match the actual services performed by the organizations as determined by patient enrollment levels and related activities. We
monitor patient enrollment levels and related activities using available information; however, if we underestimate activity levels associated with various studies at a given point in time, we could be required to record significant additional
R&D expenses in future periods when the actual activity level becomes known. We charge all such costs to R&D expenses. Non-refundable advance payments are capitalized and expensed as the related goods are delivered or services are performed.

Collaboration agreements with co-funding arrangements resulting in a net receivable or payable for R&D expenses are
recognized as the related R&D expenses by both parties are incurred. Our former agreement with Roche resulted in a net payable of approximately $7.3 million at December 31, 2009; as a result of the termination of that agreement in October
2010, there were no such payables or receivables recorded as of December 31, 2010. Reimbursements from Roche under the 2006 agreement had been credited



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directly to R&D expense and amounted to $4.4 million and $5.7 million for the years ended December 31, 2010 and 2009, respectively. There were no such reimbursements during the year
2008. See Note 7 below.

Advertising Costs

We expense advertising costs as incurred. We incurred no advertising costs in 2010, 2009 or 2008.

Income Taxes

We adopted the provisions of ASC Topic No. 740 on January 1, 2007. This guidance requires companies to determine whether it is more likely than not that a tax position will be
sustained upon examination by the appropriate taxing authorities before any tax benefit can be recorded in the financial statements. It also provides guidance on the recognition, measurement, classification and interest and penalties related to
uncertain tax positions.

We file income tax returns in the U.S. federal and various state and local jurisdictions. Tax
years beginning in 1998 through 2010 remain open to examination by the major taxing authorities to which we are subject. Our policy is to record interest related to uncertain tax positions as interest and any penalties as other expense in our
statement of operations. As of the date of adoption of this guidance and through December 31, 2010, we did not have any interest or penalties associated with unrecognized tax benefits.

Comprehensive Income (Loss)

ASC Subtopic No. 220-10, previously referred to as SFAS No. 130, Reporting Comprehensive Income, requires components of other comprehensive income, including unrealized
gains or losses on our available-for-sale securities, to be included in total comprehensive income (loss). Total comprehensive income (loss) for each of the periods presented is disclosed in Note 11 below. Other comprehensive income (loss)
includes certain changes in stockholders equity (deficit) that are excluded from net loss. Specifically, we include in other comprehensive income (loss) changes in the fair value of our available-for-sale investments, foreign currency
translation adjustments and derivatives, if any, designated as cash flow hedges.

Net Income (Loss) Per Share

We compute basic net income (loss) per share by dividing the net income (loss) for the period by the weighted average
number of common shares outstanding during the period, as adjusted. We deduct shares subject to repurchase by us from the outstanding shares to arrive at the weighted average shares outstanding. We compute diluted net income per share by dividing
the net income for the period by the weighted average number of common and potential common shares outstanding during the period. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per common share by application
of the treasury stock method. For the computation of net loss per share we exclude dilutive securities, composed of potential common shares issuable upon the exercise of stock options and common shares issuable on conversion of our convertible
notes, because of their anti-dilutive effect.

For the calculation of net loss per share, securities excluded were as follows
(in thousands):



|                                                     |  |                    |   |  |      |  |       |      |  |  |       | 
|---------------------------------------------------- |  | ------------------ | - |  | ---- |  | ----- | ---- |  |  | ----- | 
|                                                     |  | As of December 31, |  
|                                                     |  | 2010               |   |  | 2009 |  |       | 2008 | 
|Common stock options                                 |  |                    |  |  |      |  | 4,707 |      |  |  | 4,597 | 
|Shares issuable upon conversion of convertible notes |  |                    |  |  |      |  | 6,581 |      |  |  | 8,432 | 

The following table
is a reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per share attributable to our common stockholders (in thousands, except per share data):



|                                                                                   |  |                         |         |  |      |   |          |      |  |   |          |  
|---------------------------------------------------------------------------------- |  | ----------------------- | ------- |  | ---- | - | -------- | ---- |  | - | -------- | -
|                                                                                   |  | Year Ended December 31, |        
|                                                                                   |  | 2010                    |         |  | 2009 |   |          | 2008 | 
|Numerator:                                                                         |  |                         |         |  |      |   |          |      |  |   |          |  
|Net income (loss) used in the calculation of net income (loss) per share  basic   |  | $                       | 122,374 |  |      | $ | (116,020 | )    |  | $ | (106,496 | )
|                                                                                   |  |                         |         |  |      |   |          |      |  |   |          |  
|Add: Amortization of convertible debt discount                                     |  |                         | 3,776   |  |      |   |         |      |  |   |         |  
|Amortization of convertible debt issuance costs                                    |  |                         | 214     |  |      |   |         |      |  |   |         |  
|Convertible debt interest expense                                                  |  |                         | 4,358   |  |      |   |         |      |  |   |         |  
|                                                                                   |  |                         |         |  |      |   |          |      |  |   |          |  
|Net income (loss) used in the calculation of net income (loss) per share  diluted |  | $                       | 130,722 |  |      | $ | (116,020 | )    |  | $ | (106,496 | )
|                                                                                   |  |                         |         |  |      |   |          |      |  |   |          |  



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|                                                                                |  |  |        |   |  |  |        |   |  |  |        |  
|------------------------------------------------------------------------------- |  |  | ------ | - |  |  | ------ | - |  |  | ------ | -
|Denominator:                                                                    |  |  |        |   |  |  |        |   |  |  |        |  
|Weighted-average shares of common stock outstanding                             |  |  | 55,083 |   |  |  | 44,987 |   |  |  | 39,206 |  
|Less: weighted-average shares subject to repurchase                             |  |  | (881   | ) |  |  | (640   | ) |  |  | (224   | )
|                                                                                |  |  |        |   |  |  |        |   |  |  |        |  
|Weighted-average shares used in computing net income (loss) per share  basic   |  |  | 54,202 |   |  |  | 44,347 |   |  |  | 38,982 |  
|                                                                                |  |  |        |   |  |  |        |   |  |  |        |  
|Add: convertible debt shares                                                    |  |  | 6,581  |   |  |  |       |   |  |  |       |  
|Add: weighted-average stock options outstanding (treasury stock method)         |  |  | 594    |   |  |  |       |   |  |  |       |  
|                                                                                |  |  |        |   |  |  |        |   |  |  |        |  
|Weighted-average shares used in computing net income (loss) per share  diluted |  |  | 61,377 |   |  |  | 44,347 |   |  |  | 38,982 |  
|                                                                                |  |  |        |   |  |  |        |   |  |  |        |  

The calculation of basic and diluted net income (loss) per share is as follows (in thousands, except per
share data):



|                                                                                   |  |                         |         |  |      |   |          |      |  |   |          |  
|---------------------------------------------------------------------------------- |  | ----------------------- | ------- |  | ---- | - | -------- | ---- |  | - | -------- | -
|                                                                                   |  | Year Ended December 31, |        
|                                                                                   |  | 2010                    |         |  | 2009 |   |          | 2008 | 
|Net income (loss) used in the calculation of net income (loss) per share  basic   |  | $                       | 122,374 |  |      | $ | (116,020 | )    |  | $ | (106,496 | )
|Net income (loss) used in the calculation of net income (loss) per share  diluted |  | $                       | 130,722 |  |      | $ | (116,020 | )    |  | $ | (106,496 | )
|Per common share:                                                                  |  |                         |         |  |      |   |          |      |  |   |          |  
|Continuing operations  basic                                                      |  | $                       | 2.26    |  |      | $ | (2.62    | )    |  | $ | (2.73    | )
|Discontinued operations  basic                                                    |  |                         |        |  |      |   |         |      |  |   |         | *
|                                                                                   |  |                         |         |  |      |   |          |      |  |   |          |  
|Net Income (loss)  basic                                                          |  |                         | 2.26    |  |      |   | (2.62    | )    |  |   | (2.73    | )
|                                                                                   |  |                         |         |  |      |   |          |      |  |   |          |  
|Continuing operations  diluted                                                    |  |                         | 2.13    |  |      |   | (2.62    | )    |  |   | (2.73    | )
|Discontinued operations  diluted                                                  |  |                         |        |  |      |   |         |      |  |   |         | *
|                                                                                   |  |                         |         |  |      |   |          |      |  |   |          |  
|Net Income (loss)  diluted                                                        |  | $                       | 2.13    |  |      | $ | (2.62    | )    |  | $ | (2.73    | )
|                                                                                   |  |                         |         |  |      |   |          |      |  |   |          |  
|Shares used in computing basic net income (loss) per share                         |  |                         | 54,202  |  |      |   | 44,347   |      |  |   | 38,982   |  
|Shares used in computing diluted net income (loss) per share                       |  |                         | 61,377  |  |      |   | 44,347   |      |  |   | 38,982   |  



|* | Less than $0.01 per share
|- | -------------------------

Stock-Based Compensation

ASC 718-10, previously referred to as SFAS 123(R), requires companies to estimate the fair value of share-based payment awards on the date of grant using an option-pricing model. The value of the portion
of the award that is ultimately expected to vest is recognized as expense over the requisite service periods in our Consolidated Statement of Operations. Upon adoption, we retained our method of valuation for share-based awards granted beginning in
fiscal 2006 with the use of the Black-Scholes option-pricing model (Black-Scholes model). Our determination of fair value of share-based payment awards on the date of grant using an option-pricing model is affected by our stock price as
well as assumptions regarding a number of highly complex and subjective variables. These variables include, but are not limited to our expected stock price volatility over the term of the awards, and actual and projected employee stock option
exercise behaviors.

As stock-based compensation expense recognized in the Consolidated Statement of Operations for fiscal
years 2010, 2009 and 2008 is based on awards ultimately expected to vest, it has been reduced for estimated forfeitures. ASC 718-10 requires forfeitures to be estimated at the time of grant and adjusted, if necessary, in subsequent periods if actual
forfeitures differ from those estimates. Stock-based compensation expense recognized under ASC 718-10 for the years ended December 31, 2010, 2009 and 2008 was $10.3 million, $7.8 million and $6.8 million, respectively. For additional
information, see Note 13.

Recent Accounting Pronouncements

In September 2009, the FASB issued Update No. 2009-13, Multiple-Deliverable Revenue Arrangementsa consensus of the FASB
Emerging Issues Task Force (ASU 2009-13). It updates the existing multiple-element revenue arrangements guidance currently included under ASC 605-25, which originated primarily from the guidance in EITF Issue No. 00-21, Revenue
Arrangements with Multiple Deliverables (EITF 00-21). The revised guidance primarily provides two significant changes: 1) eliminates the need for objective and reliable evidence of the fair value for the undelivered element in order for a
delivered item to be treated as a separate unit of accounting, and 2) eliminates the residual method to allocate the arrangement consideration. In addition, the guidance also expands the disclosure requirements for revenue recognition. ASU 2009-13
will be effective for the first annual reporting period beginning on or after June 15, 2010, with early adoption permitted provided that the revised guidance is retroactively applied to the beginning of the year of adoption. We believe that the
adoption of this update will have no material impact on our consolidated financial statements.

In April 2010, the FASB issued
Update No. 2010-17, Milestone Method of Revenue Recognition  a consensus of the Emerging Issues Task Force. The objective of the update is to provide guidance on defining a milestone and determining when it may be



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appropriate to apply the milestone method of revenue recognition for research or development transactions. This guidance is effective on a prospective basis for milestones achieved in fiscal
years, and interim periods within those years, beginning on or after June 15, 2010. We believe that the adoption of this update will have no material impact on our consolidated financial statements.

3. RESTRUCTURING CHARGES

Following our receipt of a Complete Response Letter from the FDA requesting an additional clinical trial to evidence the efficacy of pirfenidone, we initiated a reduction in force in May 2010 resulting in
an aggregate restructuring charge of approximately $1.3 million during 2010, consisting of severance and benefits payments made to terminated employees.

Following the completion and announcement of our CAPACITY trial results, we initiated a reduction in force in February 2009 upon which we incurred approximately $0.7 million of restructuring charges
consisting of severance payments to terminated employees.

The activity in the accrued restructuring balance, included within
accrued compensation on the balance sheet, was as follows for 2009 and 2010 (in thousands):



|                    |  |                                             |    |  |         |   |     |              |  |   |                                             |   |  |         |   |  |              |   |       |                                             |  |   |        |   |  |   |   | 
|------------------- |  | ------------------------------------------- | -- |  | ------- | - | --- | ------------ |  | - | ------------------------------------------- | - |  | ------- | - |  | ------------ | - | ----- | ------------------------------------------- |  | - | ------ | - |  | - | - | 
|                    |  | RestructuringLiabilities
atDecember 31,2008 |    |  | Charges |   |     | CashPayments |  |   | RestructuringLiabilities
atDecember 31,2009 |   |  | Charges |   |  | CashPayments |   |       | RestructuringLiabilities
atDecember 31,2010 | 
|Workforce reduction |  | $                                           | 38 |  |         | $ | 697 |              |  | $ | (735                                        | ) |  | $       |  |  |              | $ | 1,300 |                                             |  | $ | (1,300 | ) |  | $ |  | 

4. SALE OF DANOPREVIR RIGHTS

In October 2010, we sold our worldwide development and commercialization rights in danoprevir to Roche for $175.0 million
in cash, all of which was included in collaboration revenue for the year ended December 31, 2010. Upon closing, we have no further deliverables or continuing obligations under this collaboration. In connection with this transaction, the
collaboration agreement that we and Roche entered into in October 2006 along with its amendments was terminated which resulted in the accelerated recognition of approximately $57.3 million in previously deferred revenue. This amount is included in
collaboration revenue for the year ended December 31, 2010.

5. INVESTMENT IN TARGANTA COMMON STOCK

In 2001, we entered into an asset purchase and license agreement with Eli Lilly pursuant to which we acquired worldwide rights to
oritavancin. The agreement provided us with exclusive worldwide rights to develop, manufacture and commercialize oritavancin.

In December 2005, we sold the oritavancin compound to Targanta Therapeutics (Targanta). The terms of the agreement included
upfront and clinical related contingent milestone payments of up to $9.0 million, of which $4.0 million had been received through March 31, 2009. We also received a convertible promissory note that, assuming certain clinical milestones
were achieved, could have been valued at up to $25.0 million in principal amount from Targanta, which note was initially secured by the oritavancin assets. Upon the achievement by Targanta of certain corporate objectives, the notes were
designed to convert into capital stock of Targanta, subject to certain limitations in the amount of voting stock that we could hold. Effective February 2007, these objectives were met by Targanta and, upon conversion of the promissory note, we
received approximately 1.7 million shares of Targanta Series C preferred stock in exchange for the convertible promissory note. In October 2007, Targanta completed an initial public offering of its common stock at a price of $10.00 per share.
Upon completion of the offering, our investment in Targanta was automatically converted into approximately 3.0 million shares of Targanta common stock and warrants to purchase approximately 0.1 million additional shares of Targanta common
stock. These shares had been restricted for resale and were subject to a lock-up agreement that expired in April 2009.

In
January 2009, The Medicines Company announced its intent to acquire Targanta for $2.00 per share, or approximately $42.0 million and on January 27, 2009 commenced a tender offer to acquire all outstanding shares of Targanta. We tendered our
shares and received approximately $6.0 million in March 2009 upon closing of the transaction, which has been included in other income in our consolidated statements of operations for the year ended December 31, 2009. We may also receive up to
an additional $4.05 per share in contingent cash payments upon the achievement of specified regulatory and commercial milestones. No amounts related to this contingent consideration had been received through December 31, 2010.



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6. ACQUIRED PRODUCT RIGHTS AND LICENSES

Marnac, Inc./KDL GmbH (Pirfenidone)

In 2002, we licensed from Marnac and its co-licensor, KDL, their worldwide rights, excluding Japan, Korea and Taiwan to develop and commercialize pirfenidone for all fibrotic diseases, including renal,
liver and pulmonary fibrosis. Under the agreement terms, we received an exclusive license from Marnac and KDL in exchange for an up-front cash payment of $18.8 million and future milestone and up to 9% royalty payments. During the third quarter
of 2007, we recorded a $7.5 million expense for such milestone payments, which were based on the progress of clinical development of pirfenidone. If all of the milestones under this agreement had been achieved, we would have been required to make
milestone payments of $14.5 million. Effective November 21, 2007, we entered into asset purchase agreements with Marnac and KDL whereby we effectively terminated the prior license agreement by purchasing, among other things, the
pirfenidone-related assets covered by such prior license agreement. Under the terms of the asset purchase agreements, we made acquisition payments of approximately $13.7 million, which includes the $7.5 million expense recorded in the third quarter
of 2007 relating to the 2002 license agreement. We also made a milestone payment of $13.5 million in March 2009 in connection with our decision to proceed with regulatory approval for pirfenidone. Future contingent acquisition payments of up to an
additional $40.0 million are required to be made by us only if positive Phase 3 data and product approval in the United States and European Union are achieved, $20.0 million for each region respectively. In March 2011, we received authorization to
market Esbriet (pirfenidone) in the European Union and are now required to make a milestone payment of $20.0 million in the aggregate to Marnac and KDL. The asset purchase agreements do not affect the rights to pirfenidone in Japan, Korea and
Taiwan, which rights are licensed by Marnac and KDL to Shionogi. Since the original 2002 license agreement has been effectively terminated as a result of our acquisition of such pirfenidone-related assets from Marnac and KDL, we no longer have
milestone or royalty obligations thereunder.

Amgen Inc. (Interferon Gamma)

In 2002, we acquired certain pending patent applications relating to interferon gamma from Amgen in exchange for $3.5 million, of
which $1.5 million was paid in June 2002, and the remaining $2.0 million was paid in January 2003. We amortized these product rights to operations over the expected useful product life of Actimmune. The net carrying value of this
intangible asset was $0.2 million as of December 31, 2008 and was fully amortized as of December 31, 2009.

Genentech, Inc. License Agreement (Actimmune®)

In 1998, we obtained a license from Genentech, Inc. (Genentech) through Connetics Corporation
(Connetics) for patents relating to Actimmune. The license from Genentech terminates on the later of May 5, 2018 or the date that the last of the patents licensed under the agreement expires. Our licensed Actimmune rights include
exclusive and non-exclusive licenses. The exclusive licenses include the right to develop and commercialize Actimmune in the United States and Canada for the treatment and prevention of all human diseases and conditions, including infectious
diseases, pulmonary fibrosis and cancer, but excluding arthritis and cardiac and cardiovascular diseases and conditions. The non-exclusive licenses include the right to make or have made Actimmune for clinical and commercial purposes within our
field of use in the United States and Canada. In Japan, we have the exclusive license rights to commercialize Actimmune for the treatment and prevention of all infectious diseases caused by fungal, bacterial or viral agents, including in patients
with CGD or osteopetrosis. We also have the opportunity, under specified conditions, to obtain further rights to Actimmune in Japan and other countries. In addition, we received an exclusive sublicense under certain of Genentechs patents
outside the United States, Canada and Japan under the BI agreement discussed below. Under the Genentech license, we pay Genentech royalties on the revenue from sales of Actimmune based on a royalty rate of 45% for the first $3.7 million of revenue
and 10% for any additional revenue, and are required to make one-time payments to Genentech upon the occurrence of specified milestone events, which include the submission of a BLA with the FDA for approval to market Actimmune for the treatment of
particular categories of diseases, the receipt of FDA approval to market Actimmune for the treatment of particular categories of diseases and the achievement of certain annual revenue targets for Actimmune. We made royalty payments of approximately
$86.7 million in the aggregate, but no milestone payments, under this agreement through December 31, 2010. If all of the milestones under this agreement are achieved, we would be required to make further milestone payments of
$9.6 million, although we have no further development plans for Actimmune. We must satisfy specified diligence obligations under the agreement with Genentech to maintain our license from Genentech and we believe that we are in compliance with
such obligations. Our rights to certain therapeutic uses for Actimmune under this agreement could revert to Genentech if we do not meet our diligence obligations or otherwise commit a material breach of the agreement.



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Connetics Corporation (acquired by Stiefel Laboratories, Inc.)
(Actimmune®)

Through an assignment and option agreement with Connetics, we paid Connetics $5.7 million to acquire rights to Actimmune and are obligated to pay to Connetics a royalty of 0.25% of our net United
States sales for Actimmune until our net United States sales cumulatively surpass $1.0 billion. Above $1.0 billion, we are obligated to pay a royalty of 0.5% of our net United States sales of Actimmune. Through a separate purchase
agreement, we paid Connetics $0.4 million to acquire rights related to scleroderma and are obligated to pay Connetics a royalty of 4.0% on our net revenue from sales of Actimmune for the treatment of scleroderma. We made royalty payments of
approximately $1.8 million in the aggregate through December 31, 2010. There are no milestone payments pursuant to this agreement.

Novartis Corporation (Small Molecule Therapeutics)

In 2004, we
entered into a license agreement with Chiron Corporation (subsequently acquired by Novartis) which granted us the right to discover, develop and commercialize small molecule therapeutic agents against certain HCV targets that are covered by patents
owned by Novartis. In consideration for this license, we paid Novartis a nonrefundable fee of approximately $0.4 million in 2004 and are required to make milestone payments based on the clinical progress of danoprevir. In 2006, we expensed $0.5
million upon initiation of the Phase 1a clinical trials for danoprevir, and made a milestone payment of approximately $0.8 million in 2009 associated with the initiation of the Phase 2b clinical trial for danoprevir. Assuming that all of the
remaining milestones under this agreement are achieved, we will be required to make future milestone payments of $3.8 million, of which Roche has agreed to reimburse us in connection with our sale of danoprevir to Roche. In addition, Novartis
is entitled to receive royalties on future product sales of danoprevir based on royalty rates that are in the single digits. The agreement with Novartis provides that the Companys obligation to make milestone payments and pay royalties will
extend until August 24, 2024, notwithstanding the expiration of the last valid patent covered by the agreement. Novartis has the right to terminate the agreement at its sole discretion in the event of a material uncured breach by the Company or
if the Company challenges patents covered by the agreement, as set forth in the agreement. The agreement is also subject to certain customary provisions regarding termination upon a bankruptcy event, as set forth in the agreement.

7. SPONSORED RESEARCH AND COLLABORATION AGREEMENTS

2010 Roche Collaboration Agreement (Protease Inhibitors)

In
December 2010, we entered into a new agreement with Roche that will focus on research to identify and develop next-generation protease inhibitors for the treatment of HCV. Under terms of the agreement, Roche will fund all research costs related to
the programs for the term of the agreement, July 1, 2010 to June 30, 2011. The deliverable in this arrangement consists solely of research services performed by us on behalf of Roche. For the year ended December 31, 2010, we received
approximately $4.5 million in reimbursements under this agreement that was recorded as collaboration revenue.

2006
Roche License and Collaboration Agreement (Protease Inhibitors)

In October 2006 we entered into a collaboration
agreement with Roche. Under the arrangement, we agreed to collaborate with Roche to develop and commercialize products from our HCV protease inhibitor program. The collaboration agreement included our former lead candidate danoprevir compound, which
entered Phase 2b clinical trials in 2009. We also agreed to collaborate with Roche on a research program to identify, develop and commercialize novel second-generation HCV protease inhibitors.

Under the terms of the Roche collaboration agreement, we agreed to conduct Phase 1 studies of danoprevir, and thereafter Roche agreed to
lead clinical development and commercialization. Upon entering into the agreement, we received an upfront payment of $60.0 million from Roche. The agreement provided for us to potentially receive up to an aggregate of $470.0 million in milestone
payments. One such milestone payment of $10.0 million was received in January 2007, which was not deemed to be substantive and at-risk at the execution of the Collaboration Agreement. Therefore, the upfront payment of $60.0 million and this $10.0
million milestone payment were deferred and were recognized ratably as collaboration revenue over the previous estimated life of the collaboration agreement and our expected period of continued involvement in the arrangement. In 2007, 2008 and 2009
we also received $10.0 million, $15.0 million and $20.0 million in milestone payments, respectively, which were recognized as revenue upon receipt. Roche agreed to fund 67% of the global development costs of danoprevir and, upon approval for
commercialization by the FDA, we agreed to co-commercialize the product in the United States and share profits on a 50-50 basis with Roche. We were also entitled to receive royalties on any sales of the product outside of the United States. In
November 2008, October 2009 and April 2010, we amended the Roche collaboration agreement among other things to extend the research program (and consequently the research



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exclusivity period whereby each party was prohibited from engaging in certain competitive research activities) for an additional amount of time and to provide for certain funding by Roche of
activities taking place during such extended research period.

Our collaboration revenue for the years ended December 31,
2010, 2009 and 2008, includes the amortization of deferred revenue of $2.5 million, $3.3 million and $3.3 million, respectively.

In October 2010, we sold our worldwide development and commercialization rights in danoprevir to Roche for $175.0 million in cash that was recorded as revenue in 2010. In connection with this transaction,
the collaboration agreement that we and Roche entered into in October 2006, along with subsequent amendments, was terminated which resulted in the accelerated recognition of approximately $57.3 million in previously deferred revenue in the fourth
quarter of 2010. As part of the arrangement, Roche agreed to reimburse us for royalty and milestone obligations that we continue to have to Novartis Corporation and Array related to danoprevir.

Array BioPharma Inc. (Small Molecule Therapeutics)

In 2002, we entered into a drug discovery collaboration agreement to create small molecule therapeutics targeting hepatitis with Array. Under that agreement, we funded drug discovery research conducted by
Array during the research term based on the number of Array scientists working on the research phase of the agreement and we are responsible for all development and commercialization. Though the research phase of the agreement expired in June 2007,
Array will continue to be entitled to receive milestone payments under the agreement based on the selection and progress of clinical drug candidates, as well as low single-digit royalties on net sales of products derived from the collaborative
efforts. In addition, in December 2004, the agreement was amended to provide a mechanism for us to purchase certain intellectual property rights arising from the collaboration. The agreement with Array provides that our obligation to pay royalties
will extend until the expiration of the last valid patent claim covering licensed product on a country-by-country and product-by-product basis, which may not occur until May 9, 2028, provided that such term is subject to modification of the
term of the underlying patents. We have the right to terminate this agreement upon written notice to Array and either party may terminate the agreement in the event of a material uncured breach by the other party, in accordance with the terms of the
agreement. The agreement is also subject to certain customary provisions regarding termination upon a bankruptcy event, as set forth in the agreement. In April 2005, we initiated a second research collaboration with Array with respect to a new
hepatology target and have since terminated that agreement. We made a milestone payment of $1.0 million under this agreement in 2009 associated with the initiation of the Phase 2b clinical study of danoprevir. We did not make any payments to Array
in 2010 or 2008. Assuming that all of the remaining milestones under the Array agreements are achieved, we will be required to make future milestone payments of $7.5 million, of which Roche has agreed to reimburse us in connection with our sale
of danoprevir to Roche.

8. FAIR VALUE

In accordance with portions of ASC Topic No. 820, formerly SFAS 157, the following table represents the fair value hierarchy for our financial assets measured at fair value on a recurring basis as of
December 31, 2010 and December 31, 2009 (in thousands):



|                                                |  |         |       |  |         |   |         |         |  |   |        |  |  |   |         | 
|----------------------------------------------- |  | ------- | ----- |  | ------- | - | ------- | ------- |  | - | ------ |  |  | - | ------- | 
|December 31, 2010                               |  | Level 1 |       |  | Level 2 |   |         | Level 3 |  |   | Total  | 
|Money market funds                              |  | $       | 96    |  |         | $ |        |         |  | $ |       |  |  | $ | 96      | 
|Obligations of government-sponsored enterprises |  |         |      |  |         |   | 178,907 |         |  |   |       |  |  |   | 178,907 | 
|Corporate debt securities                       |  |         |      |  |         |   | 24,286  |         |  |   |       |  |  |   | 24,286  | 
|Commercial paper                                |  |         |      |  |         |   | 74,780  |         |  |   |       |  |  |   | 74,780  | 
|                                                |  |         |       |  |         |   |         |         |  |   |        |  |  |   |         | 
|Total                                           |  | $       | 96    |  |         | $ | 277,973 |         |  | $ |       |  |  | $ | 278,069 | 
|                                                |  |         |       |  |         |   |         |         |  |   |        |  |  |   |         | 
|                                                |  |         |       | 
|December 31, 2009                               |  | Level 1 |       |  | Level 2 |   |         | Level 3 |  |   | Total  | 
|Money market funds                              |  | $       | 7,381 |  |         | $ |        |         |  | $ |       |  |  | $ | 7,381   | 
|Obligations of government-sponsored enterprises |  |         |      |  |         |   | 36,933  |         |  |   |       |  |  |   | 36,933  | 
|Obligations of United States government         |  |         |      |  |         |   | 6,163   |         |  |   |       |  |  |   | 6,163   | 
|Corporate debt securities                       |  |         |      |  |         |   | 10,850  |         |  |   |       |  |  |   | 10,850  | 
|Commercial paper                                |  |         |      |  |         |   | 19,495  |         |  |   |       |  |  |   | 19,495  | 
|Auction rate securities                         |  |         |      |  |         |   |        |         |  |   | 12,663 |  |  |   | 12,663  | 
|                                                |  |         |       |  |         |   |         |         |  |   |        |  |  |   |         | 
|Total                                           |  | $       | 7,381 |  |         | $ | 73,441  |         |  | $ | 12,663 |  |  | $ | 93,485  | 
|                                                |  |         |       |  |         |   |         |         |  |   |        |  |  |   |         | 



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Level 1 assets have been determined using quoted prices in active markets for identical
assets or liabilities. Level 2 assets have been obtained from inputs other than level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or
other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 assets held as of December 31, 2009 consisted of municipal notes investments, classified
primarily as noncurrent assets, with an auction reset feature (auction rate securities) whose underlying assets were generally student loans which were substantially backed by the federal government. In February 2008, auctions began to
fail for these securities. Based on the overall failure rate of these auctions, the frequency of the failures, and the underlying maturities of the securities, a portion of which were greater than 30 years, and due to the uncertainty of when we
would be able to dispose of these securities, in 2008, we classified our auction rate securities as long-term assets on our balance sheet. During the fourth quarter of 2008, we recorded an impairment charge of approximately $3.5 million on these
securities as we believed the losses were other-than-temporary in nature given the deterioration in the credit and financial markets and specifically the auction rate securities market, and our expected inability to hold such securities to their
maturity or estimated recovery. These investments were recorded at fair value as of December 31, 2009 based on a discounted cash flow analysis. The assumptions used in preparing the discounted cash flow model include estimates of, based on data
available as of December 31, 2009, interest rates, timing and amount of cash flows, credit and liquidity premiums, and expected holding periods of these securities. During 2009, several of our auction rate securities with an aggregate fair
value of $7.4 million were redeemed at or near par value and we realized gains of approximately $1.0 million which gains have been included in other income in our consolidated statements of operations for the year ended December 31, 2009.
During 2010, our remaining portfolio of auction rate securities was redeemed whereupon we recorded a realized gain of approximately $1.1 million included in other income in our consolidated statements of operations for the year ended
December 31, 2010.

The following table provides a summary of changes in fair value of our Level 3 financial assets
for the years ended December 31, 2010 and December 31, 2009 (in thousands):



|                                                              |  |                         |         |   |      |   |        |  
|------------------------------------------------------------- |  | ----------------------- | ------- | - | ---- | - | ------ | -
|                                                              |  | Auction rate Securities |        
|                                                              |  | Year Ended December 31, |        
|                                                              |  | 2010                    |         |   | 2009 |  
|Balance at beginning of period                                |  | $                       | 12,663  |   |      | $ | 17,514 |  
|Accretion and interest income                                 |  |                         | 43      |   |      |   | 94     |  
|Net settlements                                               |  |                         | (11,180 | ) |      |   | (6,471 | )
|Unrealized gain (loss) included in other comprehensive income |  |                         | (1,526  | ) |      |   | 1,526  |  
|                                                              |  |                         |         |   |      |   |        |  
|Balance at end of period                                      |  | $                       |        |   |      | $ | 12,663 |  
|                                                              |  |                         |         |   |      |   |        |  

The fair value of our long-term convertible debt is based on quoted prices for those instruments using
readily available market information. As of December 31, 2010, the fair value of our remaining $45.0 million of 0.25% convertible senior notes due 2011 (2011 Notes) was approximately $74.1 million and the fair value of our
$85.0 million 5% convertible senior notes due 2015 (2015 Notes) was approximately $173.9 million. As of December 31, 2009, the fair value of our $45.0 million 2011 Notes and $85.0 million 2015 Notes were approximately $48.9
million and $83.9 million, respectively. See also Note 12.

9. AVAILABLE-FOR-SALE INVESTMENTS

The following is a summary of our available-for-sale investments as of December 31, 2010 and 2009 (in thousands):



|                                                |  |               |         |  |                      |   |    |                       |  |   |            |   |  |   |         | 
|----------------------------------------------- |  | ------------- | ------- |  | -------------------- | - | -- | --------------------- |  | - | ---------- | - |  | - | ------- | 
|                                                |  | AmortizedCost |         |  | GrossUnrealizedGains |   |    | GrossUnrealizedLosses |  |   | Fair Value |  
|December 31, 2010                               |  |               |         |  |                      |   |    |                       |  |   |            |   |  |   |         | 
|Obligations of government-sponsored enterprises |  | $             | 178,925 |  |                      | $ | 28 |                       |  | $ | (46        | ) |  | $ | 178,907 | 
|Money market funds                              |  |               | 96      |  |                      |   |   |                       |  |   |           |   |  |   | 96      | 
|Commercial paper                                |  |               | 74,780  |  |                      |   |   |                       |  |   |           |   |  |   | 74,780  | 
|Corporate debt securities                       |  |               | 24,301  |  |                      |   |   |                       |  |   | (15        | ) |  |   | 24,286  | 
|                                                |  |               |         |  |                      |   |    |                       |  |   |            |   |  |   |         | 
|Total                                           |  | $             | 278,102 |  |                      | $ | 28 |                       |  | $ | (61        | ) |  | $ | 278,069 | 
|                                                |  |               |         |  |                      |   |    |                       |  |   |            |   |  |   |         | 



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|                                                |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 
|----------------------------------------------- |  | ------------- | ------- |  | -------------------- | - | ----- | --------------------- |  | - | ---------- | - |  | - | ------- | 
|                                                |  | AmortizedCost |         |  | GrossUnrealizedGains |   |       | GrossUnrealizedLosses |  |   | Fair Value |  
|Reported as:                                    |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 
|Cash equivalents                                |  | $             | 93,582  |  |                      | $ | 1     |                       |  | $ | (3         | ) |  | $ | 93,580  | 
|Available-for-sale securities                   |  |               | 184,520 |  |                      |   | 27    |                       |  |   | (58        | ) |  |   | 184,489 | 
|                                                |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 
|Total                                           |  | $             | 278,102 |  |                      | $ | 28    |                       |  | $ | (61        | ) |  | $ | 278,069 | 
|                                                |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 
|                                                |  |               |         | 
|                                                |  | AmortizedCost |         |  | GrossUnrealizedGains |   |       | GrossUnrealizedLosses |  |   | Fair Value |  
|December 31, 2009                               |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 
|Obligations of government-sponsored enterprises |  | $             | 36,887  |  |                      | $ | 50    |                       |  | $ | (4         | ) |  | $ | 36,933  | 
|Money market funds                              |  |               | 7,381   |  |                      |   |      |                       |  |   |           |   |  |   | 7,381   | 
|Commercial paper                                |  |               | 19,496  |  |                      |   |      |                       |  |   | (1         | ) |  |   | 19,495  | 
|Corporate debt securities                       |  |               | 10,846  |  |                      |   | 4     |                       |  |   |           |   |  |   | 10,850  | 
|Obligations of United States government         |  |               | 6,163   |  |                      |   |      |                       |  |   |           |   |  |   | 6,163   | 
|Auction rate securities                         |  |               | 11,137  |  |                      |   | 1,526 |                       |  |   |           |   |  |   | 12,663  | 
|                                                |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 
|Total                                           |  | $             | 91,910  |  |                      | $ | 1,580 |                       |  | $ | (5         | ) |  | $ | 93,485  | 
|                                                |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 
|                                                |  |               |         | 
|                                                |  | AmortizedCost |         |  | GrossUnrealizedGains |   |       | GrossUnrealizedLosses |  |   | Fair Value |  
|Reported as:                                    |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 
|Cash equivalents                                |  | $             | 10,881  |  |                      | $ |      |                       |  | $ |           |   |  | $ | 10,881  | 
|Available-for-sale securities                   |  |               | 69,892  |  |                      |   | 54    |                       |  |   | (5         | ) |  |   | 69,941  | 
|Noncurrent available-for-sale securities        |  |               | 11,137  |  |                      |   | 1,526 |                       |  |   |           |   |  |   | 12,663  | 
|                                                |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 
|Total                                           |  | $             | 91,910  |  |                      | $ | 1,580 |                       |  | $ | (5         | ) |  | $ | 93,485  | 
|                                                |  |               |         |  |                      |   |       |                       |  |   |            |   |  |   |         | 

Realized gains and losses and declines in value, judged to be other-than-temporary, on available-for-sale
securities are included in other income (expense) for the years 2010, 2009 and 2008. Realized gains and losses were calculated based on the specific identification method and were approximately $1.1 million, $6.7 million and ($3.2) million in 2010,
2009, and 2008, respectively. Realized gains in 2010 include gains from redemptions and sales of auction rate securities. Realized gains in 2009 include a $6.0 million gain from tendering all of our Targanta shares upon the sale of Targanta to The
Medicines Company. During the fourth quarter of 2008, we recorded an impairment charge of approximately $3.5 million related to the writedown of our auction rate securities as we believed the losses recorded at that time were other-than-temporary in
nature given the deteriorating credit and financial markets and specifically conditions affecting the auction rate securities market. Unrealized holding gains and losses on securities classified as available-for-sale are recorded in accumulated
other comprehensive income (loss), net of tax. At December 31, 2008, our investment in Targanta common stock consisted of approximately 3.0 million shares for which we recorded an unrealized gain on approximately 840,000 of those shares
representing the portion estimated to qualify for resale within one year. See Note 5 above.

The following is a summary of the
amortized cost and estimated fair value of available-for-sale securities at December 31, 2010 by contractual maturity (in thousands):



|                             |  |                   |         |  |            |   |         | 
|---------------------------- |  | ----------------- | ------- |  | ---------- | - | ------- | 
|                             |  | December 31, 2010 |        
|                             |  | AmortizedCost     |         |  | Fair Value |  
|Mature in less than one year |  | $                 | 236,696 |  |            | $ | 236,675 | 
|Mature in one to three years |  |                   | 41,406  |  |            |   | 41,394  | 
|                             |  |                   |         |  |            |   |         | 
|Total                        |  | $                 | 278,102 |  |            | $ | 278,069 | 
|                             |  |                   |         |  |            |   |         | 



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10. BALANCE SHEET DETAIL

Property and equipment and related accumulated depreciation and amortization is as follows at December 31, 2010 and 2009 (in
thousands):



|                                               |  |      |         |   |      |   |         |  
|---------------------------------------------- |  | ---- | ------- | - | ---- | - | ------- | -
|                                               |  | 2010 |         |   | 2009 |  
|Computer and laboratory equipment              |  | $    | 13,390  |   |      | $ | 13,290  |  
|Office furniture and fixtures                  |  |      | 3,822   |   |      |   | 3,721   |  
|Leasehold improvements                         |  |      | 9,898   |   |      |   | 9,816   |  
|                                               |  |      |         |   |      |   |         |  
|                                               |  |      | 27,110  |   |      |   | 26,827  |  
|Less accumulated depreciation and amortization |  |      | (25,864 | ) |      |   | (23,474 | )
|                                               |  |      |         |   |      |   |         |  
|Total                                          |  | $    | 1,246   |   |      | $ | 3,353   |  
|                                               |  |      |         |   |      |   |         |  

Other accrued liabilities consist of the following at December 31 2010 and 2009 (in thousands):



|                                         |  |      |        |  |      |   |        | 
|---------------------------------------- |  | ---- | ------ |  | ---- | - | ------ | 
|                                         |  | 2010 |        |  | 2009 |  
|Accrued clinical trial costs             |  | $    | 1,042  |  |      | $ | 1,576  | 
|Deferred collaboration revenue - current |  |      |       |  |      |   | 3,272  | 
|Accrued research and development         |  |      | 4,066  |  |      |   | 1,582  | 
|Accrued interest                         |  |      | 1,454  |  |      |   | 1,458  | 
|Medicaid and TriCare rebates             |  |      | 2,175  |  |      |   | 1,277  | 
|Provision for returns and rebates        |  |      | 675    |  |      |   | 227    | 
|Royalties payable                        |  |      | 565    |  |      |   | 633    | 
|Income taxes payable                     |  |      | 430    |  |      |   |       | 
|Other accrued liabilities                |  |      | 782    |  |      |   | 978    | 
|                                         |  |      |        |  |      |   |        | 
|Total other accrued liabilities          |  | $    | 11,189 |  |      | $ | 11,003 | 
|                                         |  |      |        |  |      |   |        | 

11. COMPREHENSIVE INCOME (LOSS)

Comprehensive income (loss) is comprised of net income (loss) and other comprehensive income (loss). We include in other comprehensive income (loss) unrealized gains and losses on our available-for-sale
securities, including approximately 840,000 shares of Targanta common stock during the year ended December 31, 2008, and foreign currency translation adjustments resulting from the consolidated reporting of assets, liabilities and equity of our
wholly-owned subsidiaries. The activity in other comprehensive income (loss) is as follows (in thousands):



|                                                                                                        |  |                         |         |   |      |   |          |      |  |   |          |  
|------------------------------------------------------------------------------------------------------- |  | ----------------------- | ------- | - | ---- | - | -------- | ---- |  | - | -------- | -
|                                                                                                        |  | Year Ended December 31, |        
|                                                                                                        |  | 2010                    |         |   | 2009 |   |          | 2008 | 
|Net income (loss)                                                                                       |  | $                       | 122,374 |   |      | $ | (116,020 | )    |  | $ | (106,496 | )
|Foreign currency translation adjustment                                                                 |  |                         | (3      | ) |      |   |         |      |  |   |         |  
|Change in unrealized gain (loss) on available-for-sale securities, net of tax expense of $2,275 in 2009 |  |                         | (1,609  | ) |      |   | 2,990    |      |  |   | (5,062   | )
|                                                                                                        |  |                         |         |   |      |   |          |      |  |   |          |  
|Comprehensive income (loss)                                                                             |  | $                       | 120,762 |   |      | $ | (113,030 | )    |  | $ | (111,558 | )
|                                                                                                        |  |                         |         |   |      |   |          |      |  |   |          |  

The balance of accumulated other comprehensive income (loss), net of taxes, as of December 31, 2010 and
2009 was as follows (in thousands):



|                                                            |  |              |     |   |      |   |       | 
|----------------------------------------------------------- |  | ------------ | --- | - | ---- | - | ----- | 
|                                                            |  | December 31, |    
|                                                            |  | 2010         |     |   | 2009 |  
|Cumulative foreign currency translation adjustment          |  | $            | (3  | ) |      | $ |      | 
|Net unrealized gain (loss) on available-for-sale securities |  |              | (34 | ) |      |   | 1,575 | 
|                                                            |  |              |     |   |      |   |       | 
|Total accumulated other comprehensive income (loss)         |  | $            | (37 | ) |      | $ | 1,575 | 
|                                                            |  |              |     |   |      |   |       | 



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12. CONVERTIBLE DEBT

In February 2004, we issued 0.25% convertible senior notes due March 1, 2011 in an aggregate principal amount of $170.0 million (the 2011 Notes). The 2011 Notes are convertible into our
common stock at the option of the holder at a conversion price of approximately $21.63 per share, subject to adjustment in certain circumstances. Interest on the 2011 Notes is payable semiannually in arrears on March 1 and September 1 of
each year. The 2011 Notes are unsecured and rank on parity with all existing and future senior unsecured debt and prior to all subordinated indebtedness. In addition, the 2011 Notes are effectively subordinated to any existing and future secured
debt to the extent of the value of the collateral securing such debt. Offering expenses of $3.1 million (subject to adjustment for the extinguishment described below) related to the sale of the 2011 Notes were recorded in other assets and are being
amortized to interest expense using the effective interest method over the term of the 2011 Notes, which is seven years from the date of issuance.

On June 24, 2008, we issued $85.0 million in aggregate principal amount of 5.00% Convertible Senior Notes due 2015 (the 2015 Notes) to certain holders (the Holders) of our
existing 2011 Notes in exchange for $85.0 million in aggregate principal amount of their 2011 Notes. The 2015 Notes are senior unsecured obligations of the Company and rank equally in right of payment with all of our existing and future senior debt,
including the 2011 Notes, and rank senior in right of payment to all of our existing and future subordinated debt. The 2015 Notes were exchanged by us with the Holders exclusively and solely for the 2011 Notes in a transaction exempt from
registration under Section 3(a)(9) of the Securities Act of 1933, as amended. Debt issuance costs of approximately $0.6 million related to the sale of the 2015 Notes were recorded in other assets and are being amortized to interest expense
using the effective interest method over the term of the 2015 Notes, which is approximately seven years from the date of issuance.

The terms of the 2015 Notes are substantially similar to the 2011 Notes, except, among other things, the following: (i) the 2015 Notes will mature on March 1, 2015 as opposed to March 1,
2011; (ii) the 2015 Notes bear interest at a rate of 5.00% per annum as opposed to .25% per annum; (iii) holders of the 2015 Notes may convert their 2015 Notes into shares of our common stock at a conversion rate of 52.9661
shares per $1,000 principal amount of notes (representing a conversion price of approximately $18.88 per share), subject to adjustment, whereas holders of the 2011 Notes may convert their 2011 Notes into shares of common stock at a conversion rate
of 46.2283 shares per $1,000 principal amount of notes (representing a conversion price of approximately $21.63 per share), subject to adjustment; (iv) the conversion rate for the 2015 Notes will be increased in certain circumstances that
constitute a fundamental change of the Company and in connection with a withholding tax redemption; and (v) we can only settle conversion of the 2015 Notes by delivery of shares of common stock as opposed to our ability to settle conversion of
the 2011 Notes by delivery of cash (or a combination of cash and shares) in lieu of shares.

On January 1, 2009, we
adopted Financial Accounting Standards Board (FASB), Accounting Standards Codification (ASC) Topic 470 (ASC 470), formerly FSP APB 14-1, Accounting for Convertible Debt Instruments That May be Settled in Cash
upon Conversion (Including Partial Cash Settlement). ASC 470 requires the issuer of convertible debt that may be settled in shares or cash upon conversion at their option, such as our 2011 Notes, to account for their liability and equity
components separately by bifurcating the conversion option from the debt instrument, classifying the conversion option in equity and then accreting the resulting discount on the debt as additional interest expense over the expected life of the debt.
The value assigned to the debt component is the estimated fair value, as of the issuance date, of a similar bond without the conversion feature. Although ASC 470 has no impact on our actual past or future cash flows, it requires us to record
non-cash interest expense as the debt discount is amortized.

Information about the carrying amounts of the equity component
of the 2011 Notes, the principal amount of its liability component, its unamortized discount, and its net carrying amount are as follows (in thousands; and after the exchange agreements and induced conversions described below):



|                                           |  |                         |        |   |      |   |        |  
|------------------------------------------ |  | ----------------------- | ------ | - | ---- | - | ------ | -
|                                           |  | Year Ended December 31, |       
|                                           |  | 2010                    |        |   | 2009 |  
|Carrying amount of equity component        |  | $                       | 58,523 |   |      | $ | 58,523 |  
|                                           |  |                         |        |   |      |   |        |  
|Principal amount of liability component    |  | $                       | 44,963 |   |      | $ | 44,963 |  
|Unamortized discount                       |  |                         | (663   | ) |      |   | (4,439 | )
|                                           |  |                         |        |   |      |   |        |  
|Net carrying amount of liability component |  | $                       | 44,300 |   |      | $ | 40,524 |  
|                                           |  |                         |        |   |      |   |        |  



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The remaining discount will be amortized over the remaining term of the debt through its
first redemption date, March 1, 2011. The effective interest rate on the liability component is 9.4%. The amount of interest cost recognized relating to the contractual interest rate and the amortization of the discount on the
liability component was as follows (in thousands):



|                                  |  |                         |       |  |      |   |       |      |  |   |       | 
|--------------------------------- |  | ----------------------- | ----- |  | ---- | - | ----- | ---- |  | - | ----- | 
|                                  |  | Year Ended December 31, |      
|                                  |  | 2010                    |       |  | 2009 |   |       | 2008 | 
|Contractual interest              |  | $                       | 112   |  |      | $ | 143   |      |  | $ | 319   | 
|Amortization of debt discount     |  |                         | 3,776 |  |      |   | 4,571 |      |  |   | 8,860 | 
|                                  |  |                         |       |  |      |   |       |      |  |   |       | 
|Total interest expense recognized |  | $                       | 3,888 |  |      | $ | 4,714 |      |  | $ | 9,179 | 
|                                  |  |                         |       |  |      |   |       |      |  |   |       | 

Exchange of 2011 Notes

On June 24, 2008, we issued $85.0 million in aggregate principal amount of 5.00% Convertible Senior Notes due 2015, the 2015 Notes,
to certain Holders of our existing 2011 Notes in exchange for $85.0 million in aggregate principal amount of their 2011 Notes. The 2015 Notes were exchanged by us with the Holders exclusively and solely for the 2011 Notes in a transaction exempt
from registration under Section 3(a)(9) of the Securities Act of 1933, as amended. Debt issuance costs of approximately $0.6 million related to the sale of the 2015 Notes were recorded in other assets and are being amortized to interest expense
using the effective interest method over the term of the 2015 Notes, which is approximately seven years from the date of issuance. The remaining $85.0 million in principal amount of the 2011 Notes have not been modified or extinguished.

ASC 470 requires that the value of the consideration paid to exchange the Notes be allocated (1) to the extinguishment
of the liability component and (2) to the reacquisition of the equity component. The amount allocated to the extinguishment of the liability component is equal to the fair value of that component immediately prior to
extinguishment. The difference between the consideration attributed to the extinguishment of the liability component and the sum of (a) the net carrying amount of the repurchased liability component, and (b) the related unamortized
debt issuance costs, is recognized as a loss on debt extinguishment. The remaining settlement consideration is allocated to the reacquisition of the equity component of the repurchased Notes and recognized as a reduction of stockholders
equity.

Information about the exchange and the related loss is as follows (in thousands):



|                                               |  |                   |         |  
|---------------------------------------------- |  | ----------------- | ------- | -
|                                               |  | June 2008Exchange |        
|Principal amount of 2011 Notes exchanged       |  | $                 | 85,000  |  
|                                               |  |                   |         |  
|Amount allocated to:                           |  |                   |         |  
|                                               |  |                   |         |  
|Extinguishment of liability component          |  | $                 | 67,733  |  
|Reacquisition of equity component              |  |                   | 17,267  |  
|                                               |  |                   |         |  
|Principal amount of 2015 Notes issued          |  | $                 | 85,000  |  
|                                               |  |                   |         |  
|2011 Notes exchanged                           |  | $                 | 85,000  |  
|Extinguishment of liability component          |  |                   | (67,733 | )
|Unamortized discount on exchanged senior notes |  |                   | (17,961 | )
|Related debt issuance costs                    |  |                   | (600    | )
|                                               |  |                   |         |  
|Loss on extinguishment of debt                 |  | $                 | (1,294  | )
|                                               |  |                   |         |  

Induced Conversions

In April 2009, we entered into exchange agreements with certain holders of our convertible notes to issue, in the aggregate, approximately 2.1 million shares of common stock, valued at approximately
$36.1 million, in exchange for, in the aggregate, $32.3 million principal amount of the convertible notes, representing approximately 38% of the aggregate principal outstanding of our 2011 Notes at the date of the exchanges.

In September 2009, we entered into an exchange agreement with certain holders of our convertible notes to issue approximately
0.2 million shares of common stock, valued at approximately $4.0 million, in exchange for approximately $3.8 million principal amount of the convertible notes, representing approximately 7% of the aggregate principal outstanding of our
2011 Notes at the date of the exchange.



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All of the convertible notes we acquired pursuant to the exchange agreements in April and
September 2009 were retired upon the closing of the exchanges.

Additionally, in September 2009, we entered into exchange
agreements with certain holders of our convertible notes to issue approximately 0.3 million shares of common stock, valued at approximately $4.3 million, in exchange for approximately $4.0 million principal amount of the convertible notes,
representing approximately 8% of the aggregate principal outstanding of our 2011 Notes at the date of the agreements. All of the convertible notes we acquired pursuant to the exchange agreements in September 2009 were retired upon the closing of the
exchanges in October 2009 upon completion of ten trading days of our common stock necessary to determine the final number of shares to be issued.

The exchange agreements were treated as induced conversions as the holders received a greater number of shares of common stock than would have been issued under the original conversion terms of the
convertible notes. At the time of the exchange agreements, none of the conversion contingencies were met. Under the original terms of the convertible notes, the amount payable on conversion was to be paid in cash, and the remaining conversion
obligation (stock price in excess of conversion price) was payable in cash or shares, at our option. Under the terms of the exchange agreements, all of the settlement was paid in shares. The difference in the value of the shares of common stock sold
under the exchange agreements and the value of the shares used to derive the amount payable under the original conversion agreements resulted in a loss on extinguishment of debt of approximately $13.2 million in the aggregate (the inducement loss).
As required by ASC 470, upon derecognition of the 2011 Notes, we remeasured the fair value of the liability and equity components using a borrowing rate for similar non-convertible debt that would be applicable to us at the date of the exchange
agreements. Because borrowing rates increased, the remeasurement of the components of the convertible notes resulted in a gain on extinguishment of approximately $2.8 million (the revaluation gain). As a result, we recognized a net loss on
extinguishment of debt of approximately $11.0 million during the year ended December 31, 2009, calculated as the inducement loss, plus an allocation of advisory fees of approximately $0.6 million, less the revaluation gain.

13. STOCKHOLDERS EQUITY

Employee Stock Purchase Plan

To provide employees with an
opportunity to purchase our common stock through payroll deductions, our board of directors adopted the 2000 Employee Stock Purchase Plan (the ESPP). Under the ESPP, employees, subject to certain restrictions, may purchase shares of
common stock at 85% of the fair market value at either the beginning of the offering period or the date of purchase, whichever is less. Purchases are limited to the lesser of 15% of each employees eligible annual compensation or $25,000.
Through the end of December 2010, we issued a cumulative total of 963,973 shares under the ESPP, including 121,158 issued in 2010. The number of shares available for future issuance under the plan were 1,424,537 at December 31,
2010. Beginning January 1, 2001 and continuing through and including January 1, 2006, the amount of common stock reserved for issuance under the ESPP increased annually on that date by the lesser of (i) one percent (1%) of the
total number of shares of common stock outstanding on such January 1, (ii) 400,000 shares of common stock, or (iii) a number of shares as determined by the board of directors prior to January 1, which shall be lesser than
(i) or (ii) above.

Restricted Stock Awards

During 2010, we granted employees restricted stock awards totaling approximately 620,000 shares of our common stock with a weighted
average fair value of $8.99 per share. These awards vest equally over twelve, eighteen and twenty-four month periods. In the first quarter of 2009, we granted employees performance-based restricted stock awards for approximately 550,000 shares of
our common stock with a weighted average fair value of $14.56 per share. Vesting of these shares is contingent upon the achievement of pirfenidone regulatory milestones. In May 2008 and May 2007, we granted employees restricted stock awards for
approximately 151,000 shares and 128,000 shares of our common stock, respectively, with weighted-average fair values of $15.34 and $25.50 per share, respectively, that vest annually over a four year period. Restricted stock awards are shares of
common stock which are forfeited if the employee leaves the Company prior to vesting. As a result of these restricted stock awards, we recognized $3.0 million in compensation expense during the year ended December 31, 2010, compared to $2.6
million and $1.1 million in the years ended December 31, 2009 and 2008, respectively. As all of the restricted stock awards vest through 2010 and beyond, we will continue to recognize stock based compensation expense related to the grants of
these restricted awards. These stock awards offer employees the opportunity to earn shares of our stock over time, rather than options that give the employee the right to purchase stock at a set price. If all of the remaining restricted stock awards
that were granted in the past four years vest, we will recognize approximately $10.8 million in compensation expense over a weighted average remaining period of 1.0 year. However, no compensation expense will be recognized for stock awards that do
not vest.



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A summary of our restricted stock activity is presented in the following table:



|                               |  |        |           |   |                                      |   |       | 
|------------------------------ |  | ------ | --------- | - | ------------------------------------ | - | ----- | 
|Restricted Stock Awards        |  | Shares |           |   | Weighted-AverageGrant Date FairValue |  
|Nonvested at December 31, 2007 |  |        | 209,709   |   |                                      | $ | 23.08 | 
|Granted                        |  |        | 150,748   |   |                                      |   | 15.34 | 
|Vested                         |  |        | (88,280   | ) |                                      |   | 20.56 | 
|Forfeited                      |  |        | (13,924   | ) |                                      |   | 21.38 | 
|                               |  |        |           |   |                                      |   |       | 
|Nonvested at December 31, 2008 |  |        | 258,253   |   |                                      |   | 19.51 | 
|Granted                        |  |        | 549,800   |   |                                      |   | 14.56 | 
|Vested                         |  |        | (72,752   | ) |                                      |   | 19.90 | 
|Forfeited                      |  |        | (35,607   | ) |                                      |   | 16.78 | 
|                               |  |        |           |   |                                      |   |       | 
|Nonvested at December 31, 2009 |  |        | 699,694   |   |                                      |   | 15.72 | 
|Granted                        |  |        | 619,677   |   |                                      |   | 8.99  | 
|Vested                         |  |        | (165,433  | ) |                                      |   | 18.18 | 
|Forfeited                      |  |        | (53,571   | ) |                                      |   | 14.51 | 
|                               |  |        |           |   |                                      |   |       | 
|Nonvested at December 31, 2010 |  |        | 1,100,367 |   |                                      | $ | 11.63 | 
|                               |  |        |           |   |                                      |   |       | 

Stock Compensation Plans

In 1999, we adopted the 1999 Equity Incentive Plan (1999 Plan). The 1999 Plan provided for the granting of options to purchase
common stock and the issuance of shares of common stock, subject to repurchase rights, to directors, employees and consultants. Certain options were immediately exercisable, at the discretion of our board of directors. Shares issued pursuant to the
exercise of an unvested option are subject to the right of repurchase which lapses over periods specified by the board of directors, generally four years from the date of grant. In 2000, we terminated all remaining unissued shares under the 1999
Plan amounting to 121,584 shares.

In 2000, our board of directors adopted the 2000 Equity Incentive Plan, which was most
recently amended and approved by stockholders in 2007 and re-named the Amended and Restated 2000 Equity Incentive Plan (2000 Plan). In 2000, a total of 2.0 million shares of common stock were initially reserved for issuance under
the 2000 Plan. Up through and including 2010, an additional 8.8 million shares of common stock have been reserved for issuance under the 2000 Plan. The 2000 Plan provides for the granting of options to purchase common stock and the issuance of
shares of common stock, subject to repurchase rights, to directors, employees and consultants. Shares issued pursuant to the exercise of an unvested option are subject to our right of repurchase which lapses over periods specified by the board of
directors, generally four years from the date of grant. Options not immediately exercisable generally vest up to a maximum of four years. Options previously granted under the 2000 Plan had a maximum term of 10 years. Effective May 15,
2007, new option grants have a maximum term of 7 years.

In 2000, our board of directors adopted the 2000 Non-Employee
Directors Stock Option Plan, which was most recently amended in 2007 and re-named the Amended and Restated 2000 Non-Employee Directors Stock Option Plan (Directors Plan). In 2000, a total of 180,000 shares of
common stock were initially reserved for issuance under the Directors Plan. From 2001 through 2004, an additional 1,090,000 shares of common stock were reserved for issuance under the Directors Plan. The Directors Plan
provides for the granting of options to purchase common stock and the issuance of shares of common stock, subject to repurchase rights, to directors of InterMune. Shares issued pursuant to the exercise of an unvested option are subject to our right
of repurchase which lapses over periods specified by the board of directors, generally one year from the date of grant for annual grants and three years from the date of grant for initial grants made to new directors. Options not immediately
exercisable generally vest over four years. Options granted under the Directors Plan have a maximum term of 10 years.



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The stock option and related activity under all of our stock option plans is summarized as
follows:



|                             |  |                         |            |   |                  |  |            |                                       |  |   |       | 
|---------------------------- |  | ----------------------- | ---------- | - | ---------------- |  | ---------- | ------------------------------------- |  | - | ----- | 
|                             |  | Outstanding Options     |           
|                             |  | SharesAvailableforGrant |            |   | Number ofOptions |  |            | WeightedAverageExercisePrice perShare | 
|Balance at December 31, 2007 |  |                         | 2,789,622  |   |                  |  | 4,671,268  |                                       |  | $ | 18.96 | 
|Stock options granted        |  |                         | (670,725   | ) |                  |  | 670,725    |                                       |  |   | 15.62 | 
|Restricted shares granted    |  |                         | (150,748   | ) |                  |  |           |                                       |  |   |      | 
|Forfeited stock options      |  |                         | 655,651    |   |                  |  | (655,651   | )                                     |  |   | 19.45 | 
|Restricted shares forfeited  |  |                         | 13,924     |   |                  |  |           |                                       |  |   |      | 
|Stock options exercised      |  |                         |           |   |                  |  | (89,783    | )                                     |  |   | 12.04 | 
|                             |  |                         |            |   |                  |  |            |                                       |  |   |       | 
|Balance at December 31, 2008 |  |                         | 2,637,724  |   |                  |  | 4,596,559  |                                       |  |   | 18.54 | 
|Shares added to the plan     |  |                         | 2,000,000  |   |                  |  |           |                                       |  |   |      | 
|Shares expired               |  |                         | (5,000     | ) |                  |  |           |                                       |  |   |      | 
|Stock options granted        |  |                         | (484,750   | ) |                  |  | 484,750    |                                       |  |   | 12.66 | 
|Restricted shares granted    |  |                         | (549,800   | ) |                  |  |           |                                       |  |   |      | 
|Forfeited stock options      |  |                         | 274,643    |   |                  |  | (274,643   | )                                     |  |   | 19.56 | 
|Restricted shares forfeited  |  |                         | 35,607     |   |                  |  |           |                                       |  |   |      | 
|Stock options exercised      |  |                         |           |   |                  |  | (99,567    | )                                     |  |   | 12.04 | 
|                             |  |                         |            |   |                  |  |            |                                       |  |   |       | 
|Balance at December 31, 2009 |  |                         | 3,908,424  |   |                  |  | 4,707,099  |                                       |  |   | 18.01 | 
|Stock options granted        |  |                         | (2,182,839 | ) |                  |  | 2,182,839  |                                       |  |   | 13.19 | 
|Restricted shares granted    |  |                         | (619,677   | ) |                  |  |           |                                       |  |   |      | 
|Forfeited stock options      |  |                         | 485,551    |   |                  |  | (485,551   | )                                     |  |   | 24.70 | 
|Restricted shares forfeited  |  |                         | 53,571     |   |                  |  |           |                                       |  |   |      | 
|Stock options exercised      |  |                         |           |   |                  |  | (1,183,995 | )                                     |  |   | 13.38 | 
|                             |  |                         |            |   |                  |  |            |                                       |  |   |       | 
|Balance at December 31, 2010 |  |                         | 1,645,030  |   |                  |  | 5,220,392  |                                       |  | $ | 16.42 | 

At December 31,
2010, the weighted average remaining contractual term for the outstanding options was 5.1 years and the aggregate intrinsic value was approximately $106.3 million on that date. The total intrinsic value of options exercised during the years ended
December 31, 2010, 2009 and 2008 was approximately $23.8 million, $0.2 million and $0.4 million, respectively. Intrinsic value for stock options is defined as the difference between the market value and the exercise price on the date of
exercise.

The following table summarizes information about options outstanding at December 31, 2010:



|                         |  |                 |                     |  |                                          |  |      |                               |  |   |                 |  |  |                               |           |  |  |   |       | 
|------------------------ |  | --------------- | ------------------- |  | ---------------------------------------- |  | ---- | ----------------------------- |  | - | --------------- |  |  | ----------------------------- | --------- |  |  | - | ----- | 
|Options Outstanding      |  |                 | Options Exercisable | 
|Range of Exercise Prices |  | Number ofShares |                     |  | WeightedAverageRemainingContractual Life |  |      | WeightedAverage ExercisePrice |  |   | Number ofShares |  |  | WeightedAverageExercise Price |          
|$ 8.73  $ 8.73          |  |                 | 1,435,993           |  |                                          |  | 6.44 |                               |  | $ | 8.73            |  |  |                               |          |  |  |   |      | 
|$ 9.74  $15.19          |  |                 | 1,352,932           |  |                                          |  | 6.28 |                               |  | $ | 12.73           |  |  |                               | 776,710   |  |  | $ | 12.81 | 
|$15.24  $20.08          |  |                 | 1,413,509           |  |                                          |  | 4.01 |                               |  | $ | 17.64           |  |  |                               | 1,265,216 |  |  | $ | 17.87 | 
|$20.24  $49.26          |  |                 | 1,017,958           |  |                                          |  | 2.99 |                               |  | $ | 30.49           |  |  |                               | 940,948   |  |  | $ | 29.75 | 
|                         |  |                 |                     |  |                                          |  |      |                               |  |   |                 |  |  |                               |           |  |  |   |       | 
|                         |  |                 | 5,220,392           |  |                                          |  | 5.07 |                               |  | $ | 16.42           |  |  |                               | 2,982,874 |  |  | $ | 20.30 | 
|                         |  |                 |                     |  |                                          |  |      |                               |  |   |                 |  |  |                               |           |  |  |   |       | 

At December 31, 2010, the weighted average remaining contractual term for options exercisable is 3.9
years and the aggregate intrinsic value for those shares is approximately $49.6 million. The aggregate intrinsic value of all outstanding stock options at December 31, 2010 is approximately $106.3 million. If all of the remaining nonvested and
outstanding stock option awards that have been granted became vested, we will recognize approximately $20.2 million in compensation expense over a weighted average remaining period of 1.8 years. However, no compensation expense will be recognized
for any stock awards that do not vest.

Stockholder Rights Agreement

In July 2001, our board of directors approved the adoption of a Stockholder Rights Agreement, which provided for the distribution of one
preferred share purchase right (a Right) for each outstanding share of our common stock. The dividend was paid on August 3, 2001 to the stockholders of record on that date. Each Right entitles the registered holder to purchase one
one-hundredth of a share of Series A Junior Participating Preferred Stock, par value $0.001 per share (the Preferred Shares), at a price of $390.00 per one one-hundredth of a Preferred Share (the Purchase
Price), subject to adjustment. The Rights will be exercisable upon the earlier of: (i) the date of a public announcement that a person, entity or group of affiliated or associated persons have acquired beneficial ownership of



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20% or more of the outstanding common shares (an Acquiring Person), or (ii) ten business days (or such later date as may be determined by action of the board of directors prior
to such time as any person or entity becomes an Acquiring Person) following the commencement of, or announcement of an intention to commence, a tender offer or exchange offer the consummation of which would result in any person or entity becoming an
Acquiring Person. In October 2004, the Rights Agreement was amended to allow Warburg Pincus Equity Partners, L.P. and certain of its affiliates (Warburg Pincus) to acquire ownership of up to 25% of our issued and outstanding common stock
in open market purchases without becoming an Acquiring Person. Jonathan S. Leff, a member of our board of directors, is a managing director of Warburg Pincus LLC and a partner of Warburg Pincus & Co., which are affiliates of Warburg Pincus
Equity Partners, L.P.

In the event that any person, entity or group of affiliated or associated persons become an Acquiring
Person, each holder of a Right will have the right to receive, upon exercise, the number of common shares having a market value of two times the exercise price of the Right. In the event that we are acquired in a merger or other business combination
transaction or 50% or more of our consolidated assets or earning power are sold to an Acquiring Person, its associates or affiliates or certain other persons in which such persons have an interest, each holder of a Right will have the right to
receive, upon the exercise at the then-current exercise price of the Right, that number of shares of common stock of the acquiring company which at the time of such transaction will have a market value of two times the exercise price of the Right.
At any time after an Acquiring Person becomes an Acquiring Person and prior to the acquisition by such Acquiring Person of 50% or more of the outstanding common shares, our board of directors may exchange the Rights (other than Rights owned by such
person or group which have become void), in whole or in part, at an exchange ratio of one common share, or one one-hundredth of a Preferred Share, per Right (or, at our election, we may issue cash, debt, stock or a combination thereof in exchange
for the Rights), subject to adjustment. The Rights will expire on August 3, 2011, unless we redeem or exchange them.

Public Offerings

On January 29, 2010, we completed a public offering of approximately 8.0 million shares of registered common stock, at a price of $14.10 per share, before underwriting discounts. We received net
proceeds of approximately $106.8 million after deducting underwriting fees of approximately $6.0 million and other related expenses of approximately $0.7 million. Subsequent to this transaction, we made an accelerated payment to the
U.S. Department of Justice of approximately $9.2 million in February 2010 as full payment of our financial obligation under the Civil Settlement Agreement described in Note 15 below.

On February 19, 2009, we completed a public offering of approximately 4.0 million shares of registered common stock, at a price
of $16.35 per share. We received net proceeds of approximately $63.4 million after deducting underwriting fees and other related expenses of $2.4 million.

Reserved Shares

At December 31, 2010, common stock subject to
future issuance is as follows:



|                                                                             |  |  |            | 
|---------------------------------------------------------------------------- |  |  | ---------- | 
|Common stock issuable upon conversion of convertible senior notes            |  |  | 6,580,682  | 
|Outstanding common stock options                                             |  |  | 5,220,392  | 
|Common stock available for grant under stock option plans                    |  |  | 1,645,030  | 
|Common stock available for grant under the 2000 Employee Stock Purchase Plan |  |  | 921,682    | 
|                                                                             |  |  |            | 
|Total                                                                        |  |  | 14,367,786 | 
|                                                                             |  |  |            | 

Valuation and Expense Information under ASC Topic 718-10

The following table reflects stock-based compensation expense recognized for the years ended December 31, 2010, 2009 and 2008 (in
thousands):



|                                       |  |                         |        |  |      |   |       |      |  |   |       | 
|-------------------------------------- |  | ----------------------- | ------ |  | ---- | - | ----- | ---- |  | - | ----- | 
|                                       |  | Year Ended December 31, |       
|                                       |  | 2010                    |        |  | 2009 |   |       | 2008 | 
|Research and development               |  | $                       | 3,389  |  |      | $ | 3,220 |      |  | $ | 2,627 | 
|General and administrative             |  |                         | 6,954  |  |      |   | 4,589 |      |  |   | 4,170 | 
|                                       |  |                         |        |  |      |   |       |      |  |   |       | 
|Total stock-based compensation expense |  | $                       | 10,343 |  |      | $ | 7,809 |      |  | $ | 6,797 | 
|                                       |  |                         |        |  |      |   |       |      |  |   |       | 



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Our method of valuation for share-based awards is based on the Black-Scholes model. Our
determination of fair value of share-based payment awards on the date of grant using an option-pricing model is affected by our stock price as well as assumptions regarding a number of highly complex and subjective variables. These variables
include, but are not limited to our expected stock price volatility over the term of the awards, and actual and projected employee stock option exercise behaviors. A description of the assumptions follows:



| |  |  | We estimated expected volatility using a blend of implied volatility based on market-traded options on our common stock and historical volatility of
our common stock over the contractual life of the options.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for periods within the contractual life of the
option.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The expected life of options granted represents the period of time the options are expected to be outstanding. The Company has applied the provisions
of SAB 107 as amended by SAB 110 to determine the expected term.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | The expected dividend yield is based on our current dividend yield as the best estimate of projected dividend yield for periods within the contractual
life of the option.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------

We estimated the fair value of each option grant on the date of grant using the
Black-Scholes model with the following weighted-average assumptions:



|                                |  |                        |     |   |      |  |     |      |  |  |     |  
|------------------------------- |  | ---------------------- | --- | - | ---- |  | --- | ---- |  |  | --- | -
|                                |  | Year Ended December 31 |    
|                                |  | 2010                   |     |   | 2009 |  |     | 2008 | 
|Expected stock price volatility |  |                        | 95  | % |      |  | 76  | %    |  |  | 78  | %
|Risk-free interest rate         |  |                        | 1.8 | % |      |  | 2.4 | %    |  |  | 3.3 | %
|Expected term (in years)        |  |                        | 4.4 |   |      |  | 4.7 |      |  |  | 4.6 |  
|Expected dividend yield         |  |                        |    |   |      |  |    |      |  |  |    |  

The weighted-average
fair value per share of options granted during the years ended December 31, 2010, 2009 and 2008 was $9.14, $7.76 and $9.78, respectively.

We estimated the fair value of our employees stock purchase rights under our employee stock purchase plan using the Black-Scholes model with the following weighted-average assumptions:



|                                |  |                        |     |   |      |  |     |      |  |  |     |  
|------------------------------- |  | ---------------------- | --- | - | ---- |  | --- | ---- |  |  | --- | -
|                                |  | Year Ended December 31 |    
|                                |  | 2010                   |     |   | 2009 |  |     | 2008 | 
|Expected stock price volatility |  |                        | 158 | % |      |  | 71  | %    |  |  | 77  | %
|Risk-free interest rate         |  |                        | 0.2 | % |      |  | 0.2 | %    |  |  | 1.8 | %
|Expected term (in years)        |  |                        | 0.5 |   |      |  | 0.5 |      |  |  | 0.5 |  
|Expected dividend yield         |  |                        |    |   |      |  |    |      |  |  |    |  

The weighted-average
fair value for purchase rights granted under the employee stock purchase plan for the years ended December 31, 2010, 2009 and 2008 was $8.47, $4.41 and $6.02, respectively.

As stock-based compensation expense recognized in the Consolidated Statement of Operations for fiscal years 2010, 2009 and 2008 is based
on awards ultimately expected to vest, each has been reduced for estimated forfeitures. ASC Topic 718-10 requires forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from
those estimates.



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14. INCOME TAXES

The components of the provision for income tax expense (benefit) consists of the following (in thousands):



|                                 |  |      |    |  |      |   |       |      |  |   |   | 
|-------------------------------- |  | ---- | -- |  | ---- | - | ----- | ---- |  | - | - | 
|                                 |  | 2010 |    |  | 2009 |   |       | 2008 | 
|Current:                         |  |      |    |  |      |   |       |      |  |   |   | 
|Federal                          |  | $    |   |  |      | $ | (122  | )    |  | $ |  | 
|State                            |  |      | 76 |  |      |   | 1     |      |  |   |  | 
|                                 |  |      |    |  |      |   |       |      |  |   |   | 
|Total current                    |  | $    | 76 |  |      | $ | (121  | )    |  | $ |  | 
|Deferred:                        |  |      |    |  |      |   |       |      |  |   |   | 
|Federal                          |  | $    |   |  |      | $ | 1,934 |      |  | $ |  | 
|State                            |  |      |   |  |      |   | 341   |      |  |   |  | 
|                                 |  |      |    |  |      |   |       |      |  |   |   | 
|Total deferred                   |  | $    |   |  |      | $ | 2,275 |      |  | $ |  | 
|Total provision for income taxes |  | $    | 76 |  |      | $ | 2,154 |      |  | $ |  | 
|                                 |  |      |    |  |      |   |       |      |  |   |   | 

Previously in 2007, we recorded a deferred tax benefit primarily related to net operating losses that we had
concluded to be realizable based on our estimate of future taxable income resulting from future potential sales of our shares of Targanta common stock. The tax benefit was reversed in 2009 following our sale of Targanta shares in 2009.

A reconciliation of the Companys recorded income tax expense (benefit) to the U.S. statutory rate is as follows:



|                                                 |  |      |        |   |      |  |       |      |  |  |       |   
|------------------------------------------------ |  | ---- | ------ | - | ---- |  | ----- | ---- |  |  | ----- | --
|                                                 |  | 2010 |        |   | 2009 |  |       | 2008 | 
|Federal tax expense (benefit) at statutory rate  |  |      | 34.0   | % |      |  | (34.0 | )%   |  |  | (34.0 | )%
|Increase (reduction) in tax resulting from:      |  |      |        |   |      |  |       |      |  |  |       |   
|State taxes, net of federal benefits             |  |      | 7.2    |   |      |  | 4.2   |      |  |  | (6.6  | ) 
|Change in valuation allowance                    |  |      | (128.0 | ) |      |  | 39.3  |      |  |  | 51.1  |   
|Research and development and orphan drug credits |  |      | (8.2   | ) |      |  | (11.1 | )    |  |  | (11.4 | ) 
|Sale of intellectual property                    |  |      | 85.2   |   |      |  |      |      |  |  |      |   
|Change in deferreds                              |  |      | 8.9    |   |      |  | (11.1 | )    |  |  | (4.1  | ) 
|Stock options                                    |  |      | (1.1   | ) |      |  | 1.0   |      |  |  | 0.5   |   
|Debt extinguishment                              |  |      |       |   |      |  | 3.9   |      |  |  |      |   
|Other                                            |  |      | 2.1    |   |      |  | 9.5   |      |  |  | 4.5   |   
|                                                 |  |      |        |   |      |  |       |      |  |  |       |   
|Totals                                           |  |      | 0.1    | % |      |  | 1.7   | %    |  |  |      |   
|                                                 |  |      |        |   |      |  |       |      |  |  |       |   

Deferred income taxes arise from temporary differences between the carrying amounts of assets and
liabilities for financial reporting purposes and the amounts used for income tax reporting purposes, as well as operating losses and tax credit carryforwards.

Significant components of our deferred tax assets for federal and state income taxes were as follows at December 31, 2010 and 2009 (in thousands):



|                                           |  |      |          |   |      |   |          |  
|------------------------------------------ |  | ---- | -------- | - | ---- | - | -------- | -
|                                           |  | 2010 |          |   | 2009 |  
|Deferred tax assets:                       |  |      |          |   |      |   |          |  
|Net operating loss carryforwards           |  | $    | 91,969   |   |      | $ | 220,054  |  
|Research and development credits           |  |      | 87,640   |   |      |   | 84,064   |  
|Capitalized research and development costs |  |      | 10,227   |   |      |   | 17,869   |  
|Deferred revenue                           |  |      |         |   |      |   | 23,140   |  
|Other, net                                 |  |      | 18,024   |   |      |   | 21,069   |  
|                                           |  |      |          |   |      |   |          |  
|Total deferred tax assets                  |  |      | 207,860  |   |      |   | 366,196  |  
|Valuation allowance                        |  |      | (207,609 | ) |      |   | (364,476 | )
|                                           |  |      |          |   |      |   |          |  
|Net deferred tax assets                    |  | $    | 251      |   |      | $ | 1,720    |  
|Deferred tax liability:                    |  |      |          |   |      |   |          |  
|Debt discount, net of issuance costs       |  |      | (251     | ) |      |   | (1,720   | )
|                                           |  |      |          |   |      |   |          |  
|Net deferred tax liabilities               |  |      | (251     | ) |      |   | (1,720   | )
|                                           |  |      |          |   |      |   |          |  
|Net deferred tax                           |  | $    |         |   |      | $ |         |  
|                                           |  |      |          |   |      |   |          |  



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Due to uncertainty surrounding the realization of the favorable tax attributes in future tax
returns, we have placed a full valuation allowance against our net deferred tax assets. The valuation allowance decreased by $156.9 million during the year ended December 31, 2010 and increased by $50.6 million and $66.4 million
during the years ended December 31, 2009 and 2008, respectively.

As of December 31, 2010, we had federal net
operating loss carryforwards of approximately $221.3 million. The net operating loss carryforwards will expire at various dates beginning in 2025 if not utilized. We also have federal research and development tax credits of approximately
$9.1 million that will begin to expire in the year 2020 and federal Orphan Drug credit carryforwards of approximately $93.4 million that will begin to expire in the year 2022. In addition, we had net operating loss carryforwards for state
income tax purposes of approximately $290.5 million that begin to expire in 2015 and state research and development tax credits of approximately $8.5 million that do not expire.

In general, Section 382 of the Internal Revenue Code (IRC) of 1986, as amended, imposes annual limitations on the
utilization of net operating loss carryforwards, other tax carryforwards and certain built-in losses, as defined under that Section, upon an ownership change. In general, an ownership change occurs if the aggregate stock ownership of certain
stockholders increases by more than 50 percentage points over such stockholders lowest percentage ownership during the testing period (generally three years). We have analyzed our historical ownership changes and removed any net operating loss
carryforwards that will expire unutilized from our deferred tax balances as a result of IRC Section 382 limitations.

In accordance with ASC 810-10-45-8, we recorded a deferred charge during the year ended December 31, 2010 related to the deferral of income tax expense on inter-company profits that resulted from the
sale of our non-U.S. economic rights to Esbriet® to InterMune International AG, a wholly owned subsidiary formed
in 2010. The deferred charge is included in other assets in the accompanying consolidated balance sheets and will be amortized as a component of income tax expense in the accompanying consolidated statements of operations over the estimated life of
the intellectual property. In 2010, we recorded a prepaid tax expense of $0.3 million, which represents the deferral of income tax expense.

We adopted the provisions of ASC Topic No. 740 on January 1, 2007. This guidance requires companies to determine whether it is more likely than not that a tax position will be
sustained upon examination by the appropriate taxing authorities before any tax benefit can be recorded in the financial statements. It also provides guidance on the recognition, measurement, classification and interest and penalties related to
uncertain tax positions. The following table summarizes the activity related to the Companys gross unrecognized tax benefits (in thousands):



|                                                |  |                               |        |  
|----------------------------------------------- |  | ----------------------------- | ------ | -
|                                                |  | GrossUnrecognizedTax Benefits |       
|Balance at December 31, 2007                    |  | $                             | 13,369 |  
|Changes related to prior tax positions          |  |                               | (340   | )
|Increases related to current year tax positions |  |                               | 3,852  |  
|                                                |  |                               |        |  
|Balance at December 31, 2008                    |  |                               | 16,881 |  
|Changes related to prior tax positions          |  |                               | 2,505  |  
|Increases related to current year tax positions |  |                               | 2,521  |  
|                                                |  |                               |        |  
|Balance at December 31, 2009                    |  |                               | 21,907 |  
|Changes related to prior tax positions          |  |                               | (3,551 | )
|Increases related to current year tax positions |  |                               | 2,188  |  
|                                                |  |                               |        |  
|Balance at December 31, 2010                    |  | $                             | 20,544 |  
|                                                |  |                               |        |  

At December 31, 2010 and 2009, the Company had unrecognized tax benefits of approximately $20.5 million
and $21.9 million, respectively. The unrecognized tax benefits, if recognized, would not have an impact on the Companys effective tax rate. The Company does not expect a significant change to its unrecognized tax benefits over the next twelve
months. The unrecognized tax benefits may increase or change during the next year for items that arise in the ordinary course of business.

We file income tax returns in the U.S. federal and various state and local jurisdictions. Tax years beginning in 1998 through 2010 remain open to examination by the major taxing authorities to which
we are subject. Our policy is to record interest related to uncertain tax positions as interest and any penalties as other expense in our consolidated statement of operations. As of the date of adoption of ASC Topic No. 740 and through
December 31, 2010, we did not have any interest or penalties associated with unrecognized tax benefits.



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15. COMMITMENTS AND CONTINGENCIES

Leases

We have a non-cancelable lease for facilities, which expires in April 2016, with an option to extend the term for an additional five years. Total rent expense was approximately $4.1 million for each of
the years ended December 31, 2010, 2009 and 2008.

The following is a schedule by year of future minimum lease payments
of all leases at December 31, 2010 (in thousands):



|                    |  |                 |        | 
|------------------- |  | --------------- | ------ | 
|Year                |  | OperatingLeases |       
|2011                |  | $               | 2,765  | 
|2012                |  |                 | 1,670  | 
|2013                |  |                 | 1,738  | 
|2014                |  |                 | 1,824  | 
|2015                |  |                 | 1,909  | 
|2016 and thereafter |  |                 | 648    | 
|                    |  |                 |        | 
|                    |  | $               | 10,554 | 
|                    |  |                 |        | 

The operating lease for our facility requires a letter of credit secured by a restricted cash balance with
our bank. The amount of the letter of credit approximates 6-12 months of operating rent payable to the landlord of the facility and is effective until we reach sustained profitability. At December 31, 2010 and 2009, restricted cash under
this letter of credit amounted to $1.4 million.

Purchase Commitments

In January 2000, we entered into an agreement with Boehringer Ingelheim, or BI, for the clinical and commercial supply of Actimmune that
was later terminated in June 2007. On June 29, 2007, we and BI entered into a new agreement for the clinical and commercial supply of Actimmune (Supply Agreement). Under the terms of the new Supply Agreement, we are not required to
make any minimum annual purchase commitments and BI is not required to commit to reserving any minimum annual capacity for the manufacture of Actimmune. On a going forward basis, the product will be purchased based upon a rolling forecast. The new
Supply Agreement was effective as of June 29, 2007 and expires on December 31, 2012. If BI is not able to supply all of our requirements for Actimmune, we may choose an additional manufacturer. However, we are not entitled to seek such a
secondary source until BI has informed us of its unwillingness or inability to meet our requirements. Either party has the right to terminate the Supply Agreement if the other party materially breaches its obligations thereunder. In addition, we
have the right to terminate the Supply Agreement immediately in the event that health authorities prevent distribution of Actimmune for all indications.

In September 2009, we entered into a commercial manufacturing agreement with Catalent Pharma Solutions, LLC (Catalent) to process and encapsulate the active pharmaceutical ingredients
(API) for pirfenidone and to supply us with bulk pharmaceutical pirfenidone product for commercial use. The agreement generally provides for the exclusive supply by Catalent and the exclusive purchase (except in certain limited
circumstances) by us of the bulk pharmaceutical pirfenidone product with respect to certain territories where we hold exclusive rights to pirfenidone. In the fourth year of the agreement, Catalents exclusive supply and our exclusive
purchase obligations under the agreement will only apply to 50% of our commercial requirements for the bulk pharmaceutical pirfenidone product in the United States while supply and purchase obligations of the parties under the agreement will be
non-exclusive for the other geographical territories subject to the agreement. Furthermore, after the fifth year of the agreement, the supply and purchase obligations of the parties under the agreement will become non-exclusive for all
territories subject to the agreement. Under the terms of this agreement, we are not required to make any minimum annual purchases. The bulk pharmaceutical pirfenidone product are required to be purchased by us based upon a rolling
forecast. The agreement was made effective as of September 10, 2009 and is scheduled to continue for an initial term of five (5) years from the date of our commercial launch of pirfenidone, if approved by a regulatory agency, subject
to renewal. If Catalent is not able to supply all of our requirements for the bulk pharmaceutical pirfenidone product, we may purchase such product from a second source supplier. Either party has the right to terminate the supply agreement if
the other party materially breaches its obligations thereunder.

Contingent Payments

We may be required to make contingent milestone payments to the owners of our licensed products or the suppliers of our drug compounds in
accordance with our license, commercialization and collaboration agreements in the aggregate amount of $62.1 million if all of the milestones per the agreements are achieved. These milestones include development, regulatory approval,
commercialization and sales milestones. Of the remaining $62.1 million in future aggregate milestone payments, $40.0 million in



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contingent payments would be made by us only if positive Phase 3 data and product approval in the United States and European Union are achieved for pirfenidone, $20.0 million for each region
respectively. Effective March 2011, we received authorization to market Esbriet (pirfenidone) in the European Union and $20.0 million is now due and payable. We paid $13.5 million in March 2009 in connection with our decision to proceed with
regulatory approval for pirfenidone. Potential future milestone payments of $9.6 million are related to the further development of Actimmune, for which we have no current plans to pursue, and therefore we do not expect to pay these amounts. Included
in the $62.1 million in future aggregate milestone payments are aggregate milestone payments of $11.3 million payable to Array and Novartis, of which Roche has agreed to reimburse us in connection with our sale of danoprevir to Roche.

Department of Justice Settlement

On November 9, 2004, we received a subpoena from the U.S. Department of Justice requiring us to provide the Department of Justice with certain information relating to Actimmune, including information
regarding the promotion and marketing of Actimmune. On October 25, 2006 we reached a comprehensive settlement with the government to resolve all claims without criminal sanctions relating to promotional activities for Actimmune for IPF by
our former employees during a period ending in June 2003. As part of this comprehensive settlement, we entered into a Civil Settlement Agreement with the United States Department of Justice and the United States Attorneys Office for the
Northern District of California. In addition, we entered into a Deferred Prosecution Agreement with the United States Attorneys Office for the Northern District of California and a Corporate Integrity Agreement with the Office of the
Inspector General of the United States Department of Health and Human Services.

Under the terms of the Civil Settlement
Agreement, we agreed to pay $36.9 million plus 5% interest on the then outstanding principal balance to the government over a period of five years, an amount to be shared between the Federal and participating State governments as per the agreement
and the Medicaid Program. In October 2008, we entered into settlement and release agreements with the majority of the participating State governments pursuant to which the State portion of the aforementioned $36.9 million was distributed among
such participating State governments. We recorded a $36.9 million charge during 2006 to reflect the final terms of the Civil Settlement Agreement. We have paid an aggregate of approximately $23.6 million in the previous four years (excluding
accelerated payments described below), and had been required to make additional payments on the remaining settlement amount over the following two years in annual installments. The Civil Settlement Agreement contained a provision for the
acceleration of certain of the $36.9 million in original scheduled principal payments if we receive over $150.0 million from partnering, license fees and milestone payments (excluding any research and development contributions), external debt and
equity financing during the term of the Civil Settlement Agreement, subject to a cap on any acceleration of payment of $10.0 million in any one year. Since entering into the Civil Settlement Agreement up through February 2010, we received $55.0
million in license fees and milestone payments under our various partnering and collaboration agreements and approximately $243.7 million in equity financing. As a result, we exceeded the aforementioned $150.0 million threshold by approximately
$148.7 million and subsequently made accelerated payments to the U.S. Department of Justice in the aggregate amount of approximately $17.6 million as of February 2010, which includes approximately $8.4 million paid in 2009 and approximately $9.2
million paid in February 2010. As a result of our accelerated payment in February 2010, we have made all required payments to the Department of Justice under the terms of the Civil Settlement Agreement.

Under the terms of the Deferred Prosecution Agreement, the United States Attorneys Office for the Northern District of California
filed an Information charging us with one count of off-label promotion of Actimmune for use with IPF, but will defer prosecution of such charge during the two year term of the Deferred Prosecution Agreement. The two year term of such agreement
expired December 2008 and the Information filed against us has since been dismissed.

Under the terms of the Corporate
Integrity Agreement, the Office of the Inspector General of the United States Department of Health and Human Services agreed to waive any potential exclusion of us from participation in federal health care programs provided that we comply with the
terms of the Corporate Integrity Agreement for a period of five years. As part of the agreement, we agreed to retain an independent review organization to conduct periodic reviews of our promotional processes and policies as well as reviews of
certain medical affairs group records. Effective October 29, 2010, the Office of the Inspector General of the United States Department of Health and Human Services agreed to suspend further enforcement of the Corporate Integrity Agreement upon
the declaration by InterMune that (a) Actimmune is InterMunes only FDA-approved product, (b) InterMune currently has no US-based sales force and does not actively market Actimmune for any indication, and (c) between June 1,
2009 and October 10, 2011, InterMunes Medical Affairs department received an insufficient number of inquiries regarding the use of Actimmune in IPF to conduct the internal and external audit as anticipated in the Corporate Integrity
Agreement. InterMune and the Office of the Inspector General of the United States Department of Health and Human Services further agreed that should InterMune engage in any US marketing activities (other than with regard to sales of Actimmune for
its on-label indications of chronic granulomatous disease and severe malignant osteopetrosis), the Office of the Inspector General of the United States Department of Health and Human Services shall have the right,



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upon written notice to InterMune, to cancel the suspension and reinstate enforcement of the Corporate Integrity Agreement through its expiration date of October 26, 2011.

Legal Proceedings

In May 2008, a complaint was filed in the United States District Court for the Northern District of California entitled Deborah Jane Jarrett, Nancy Isenhower, and Jeffrey H. Frankel v. InterMune, Inc., W.
Scott Harkonen, and Genentech, Inc., Case No. C-08-02376. Plaintiffs alleged that they were administered Actimmune, and they purported to sue on behalf of a class of consumers and other end-payors of Actimmune. The complaint alleged that the Company
fraudulently misrepresented the medical benefits of Actimmune for the treatment of IPF and promoted Actimmune for IPF. The complaint asserted various claims against the Company, including civil RICO, unfair competition, violation of various state
consumer protection statutes, and unjust enrichment. The complaint sought various damages in an unspecified amount, including compensatory damages, treble damages, punitive damages, restitution, disgorgement, prejudgment and post-judgment interest
on any monetary award, and the reimbursement of the plaintiffs legal fees and costs. The complaint also sought equitable relief. Between June 2008 and September 2008, three additional complaints were filed in the United States District Court
for the Northern District of California alleging similar facts. In February 2009, the Court consolidated the four complaints for pretrial purposes.

The motions to dismiss in all four cases were heard in February 2009. In April 2009, the Court granted the motions to dismiss the complaints in all four cases in their entirety and granted the plaintiffs
leave to amend the complaints. Following the initial motion to dismiss, the plaintiffs have filed amended complaints and on January 25, 2010, the Company and the other defendants each filed motions to dismiss the most recently filed amended
complaints. Pursuant to stipulation of the parties, plaintiffs have filed an opposition to these motions. All these motions were fully briefed as of March 8, and were heard on May 10, 2010. On September 1, 2010, the Court issued an
opinion dismissing all remaining claims in all consolidated cases with prejudice and entered judgment accordingly. On October 1, 2010, the remaining plaintiffs in all cases filed notices of appeal, appealing the judgment to the United States
Court of Appeals for the Ninth Circuit. Plaintiffs opening briefs were filed on February 14, 2011. The Company and other defendants answering briefs are due on March 24, 2011, and plaintiffs optional reply briefs are due
within 14 days of service of the last-served answering brief.

The Company believes it has substantial factual and legal
defenses to the claims at issue and intends to defend the actions vigorously. We may enter into discussions regarding settlement of these matters, and may enter into settlement agreements, if we believe settlement is in the best interests of our
stockholders. We cannot reasonably estimate the possible loss or range of loss that may arise from these lawsuits.

Indemnity Agreement

On or about March 22, 2000, the Company entered into an Indemnity Agreement with W. Scott Harkonen M.D., who served as the Companys chief executive officer until June 30, 2003. The
Indemnity Agreement obligates the Company to hold harmless and indemnify Dr. Harkonen against expenses (including attorneys fees), witness fees, damages, judgments, fines and amounts paid in settlement and any other amounts
Dr. Harkonen becomes legally obligated to pay because of any claim or claims made against him in connection with any threatened, pending or completed action, suit or proceeding, whether civil, criminal, arbitrational, administrative or
investigative, to which Dr. Harkonen is a party by reason of the fact that he was a director, officer, employee or other agent of the Company. The Indemnity Agreement establishes exceptions to the Companys indemnification obligation,
including but not limited to claims on account of [Dr. Harkonens] conduct that is established by a final judgment as knowingly fraudulent or deliberately dishonest or that constituted willful misconduct, claims on account of
[Dr. Harkonens] conduct that is established by a final judgment as constituting a breach of [Dr. Harkonens] duty of loyalty to the Corporation or resulting in any personal profit or advantage to which [Dr. Harkonen] was not legally
entitled, and claims for which payment is actually made to [Dr. Harkonen] under a valid and collectible insurance policy. The Indemnity Agreement, however, obligates the Company to advance all expenses, including attorneys
fees, incurred by Dr. Harkonen in connection with such proceedings, subject to an undertaking by Dr. Harkonen to repay said amounts if it shall be determined ultimately that he is not entitled to be indemnified by the Company.

Dr. Harkonen has been named as a defendant in the civil action lawsuits described above. Dr. Harkonen also was a target of the
investigation by the U.S. Department of Justice regarding the promotion and marketing of Actimmune. On March 18, 2008, a federal grand jury indicted Dr. Harkonen on two felony counts related to alleged improper promotion and marketing of
Actimmune during the time Dr. Harkonen was employed by the Company. Trial in the criminal case (the Criminal Action) resulted in a jury verdict on September 29, 2009, finding Dr. Harkonen guilty of one count of wire fraud
related to a press release issued on August 28, 2002, and acquitting him of a second count of a misbranding charge brought under the Federal Food, Drug, and Cosmetic Act. Dr. Harkonen has



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filed a motion for a new trial, which is scheduled to be heard by the Court on March 14, 2011. The Company understands that, if that motion is denied, Dr. Harkonen intends to appeal the
jurys guilty verdict.

Prior to December 2008, insurers that issued directors & officers (D&O)
liability insurance to the Company had advanced all of Dr. Harkonens expenses, including attorneys fees, incurred in the civil action lawsuits and Criminal Action. Those insurers included National Union Fire Insurance Company of
Pittsburgh, PA (AIG), Underwriters at Lloyds, London (Lloyds), and Continental Casualty Company (CNA). On November 19, 2008, however, the insurer that issued a $5 million D&O insurance policy
providing coverage excess of the monetary limits of coverage provided by AIG, Lloyds and CNA, Arch Specialty Insurance Company (Arch), advised the Company that the limits of the underlying coverage were expected to be depleted by
approximately December 15, 2008; that Arch disclaims coverage based on misstatements and misrepresentations allegedly made by Dr. Harkonen in documents provided in the application for the Arch policy and the underlying
Lloyds policy; and, based on that disclaimer, Arch would not be advancing any of Dr. Harkonens expenses, including attorneys fees, incurred in the civil action lawsuits and Criminal Action.

As a result of Archs disclaimer of coverage and refusal to advance expenses, including attorneys fees, the Company had, as of
approximately December 15, 2008, become obligated to advance such expenses incurred by Dr. Harkonen in the civil action lawsuits and Criminal Action.

On January 13, 2009, the Company submitted to the American Arbitration Association (AAA) a Demand for Arbitration, InterMune, Inc. v. Arch Specialty Insurance Co., No. 74 194 01128
08 JEMO. Dr. Harkonen also is a party to the Arbitration. The Demand for Arbitration sought an award compelling Arch to advance Dr. Harkonens legal fees and costs incurred in the civil action lawsuits and Criminal Action, and to
advance other former officers legal fees and costs incurred in relation to the Department of Justice investigation.

The
matter was heard by the arbitration panel and on May 29, 2009, the arbitration panel issued an Interim Arbitration Award granting the Companys request for a partial award requiring Arch to advance Dr. Harkonens legal fees and
costs incurred in the civil action lawsuits and Criminal Action. Arch subsequently advanced such fees and costs, including fees and costs previously paid by the Company. The question whether Arch ultimately will be required to cover the advanced
fees and costs or, instead, may recoup those fees and costs as not covered by its policy, has not been determined. Unless and until the arbitration panel rules that such fees and costs are not covered, Arch remains obligated to advance such fees and
costs. The Company believes that the jury verdict in the Criminal Action does not constitute a final judgment as defined by the D&O liability insurance policy, and therefore does not alter the current situation with respect to this arbitration
or the application of the D&O liability insurance in general.

In late 2009, Arch advised the Company that Arch had
exhausted the $5.0 million limit of liability of the Arch D&O insurance policy, and that defense cost invoices submitted to Arch collectively exceed the Arch policys limit. The Company therefore advised the insurer that issued a $5.0
million D&O insurance policy providing coverage excess of the monetary limits of coverage provided by Arch, Old Republic Insurance Company (Old Republic), that the limits of the underlying coverage had been depleted, and the Company
submitted invoices for legal services rendered on behalf of Dr. Harkonen and other individuals who were targets of the U.S. Department of Justices investigation to Old Republic for payment. Old Republic agreed to advance
Dr. Harkonens legal fees and costs incurred in the civil action lawsuits and Criminal Action, but declined to reimburse the Company for payments made on behalf of other individuals who were targets of the U.S. Department of Justices
investigation. In mid-2010, Old Republic advised the Company that Dr. Harkonens defense fees and costs had exhausted the $5 million limit of the Old Republic insurance policy as of the second quarter of 2010. There is no additional
insurance coverage available to cover the cost of Dr. Harkonens continuing defense. Defense fees and costs incurred over and above this final $5 million of insurance coverage therefore are, in the absence of any available insurance, to be
advanced by the Company pursuant to the terms of the Indemnity Agreement. We expect amounts to be advanced by the Company to continue into the future until the Criminal Action is finally adjudicated, however we are unable to predict what our total
liability could be with any degree of certainty. We cannot reasonably estimate the possible loss or range of loss that may arise from this matter.

On April 14, 2010, the American Arbitration Association asked the parties to the insurance arbitration to report on the status of the case. Arch Insurance Company responded, stating that it intends
to seek to recover from Dr. Harkonen and the Company the $5 million Arch advanced toward Dr. Harkonens defense costs. Arch subsequently indicated that it intended to contend that, once a judgment is entered against Dr. Harkonen,
both he and the Company would be collaterally estopped with respect to Archs claim that Dr. Harkonen knowingly made certain misrepresentations at the time he executed a warranty in the course of applying for the Arch insurance and,
therefore, that Arch may obtain an award ordering Dr. Harkonen and the Company to repay the $5 million advanced by Arch on the basis of such judgment. Dr. Harkonen and the Company strongly disagree with Archs contention.



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On December 15, 2010, the arbitration panel issued an Order stating that while the
arbitrators agree that the judgment of conviction would have some collateral estoppel effect, the issue remains whether the judgment has necessarily determined the facts establishing that Dr. Harkonen knew that his conduct could give rise
to a claim that would exceed $20 million and, consequently, impact Archs layer of coverage or, alternatively, whether the Panel must hold an evidentiary hearing on that question in order to determine whether there has been a breach of warranty
that would nullify all [of Archs] coverage and require a refund of all defense costs previously paid by Arch.

The
arbitration panel deferred addressing that question until the completion of Dr. Harkonens sentencing. The parties are to file simultaneous memoranda within 15 days of sentencing advising the panel of the District Courts action and
any findings bearing on this question, and addressing the issue of the collateral estoppel consequences, if any, of the District Courts action relating to sentencing and sentence enhancement.

The Company believes no change to the status of the interim Arbitration Award has occurred solely due to a jury verdict, therefore the
Company has not recorded any accrued liabilities associated with this matter. We cannot reasonably estimate the possible loss or range of loss that may arise from this matter.

16. DISCLOSURES ABOUT SEGMENTS OF AN ENTERPRISE AND RELATED INFORMATION

We have determined that, in accordance with ASC Topic No. 280, previously referred to as SFAS No. 131, we operate in one
segment, because operating results are reported only on an aggregate basis to our chief operating decision makers. We currently market Actimmune in the United States for the treatment of chronic granulomatous disease and severe, malignant
osteopetrosis.

Our net revenue by region for the years ended December 31 2010, 2009 and 2008, are as follows (in
thousands):



|                 |  |      |         |  |      |   |        |      |  |   |        | 
|---------------- |  | ---- | ------- |  | ---- | - | ------ | ---- |  | - | ------ | 
|                 |  | 2010 |         |  | 2009 |   |        | 2008 | 
|United States    |  | $    | 19,875  |  |      | $ | 25,231 |      |  | $ | 29,791 | 
|Europe and other |  |      | 239,416 |  |      |   | 23,469 |      |  |   | 18,361 | 
|                 |  |      |         |  |      |   |        |      |  |   |        | 
|Totals           |  | $    | 259,291 |  |      | $ | 48,700 |      |  | $ | 48,152 | 
|                 |  |      |         |  |      |   |        |      |  |   |        | 

Our revenue and trade receivables are concentrated with a few customers. We perform credit evaluations on
our customers financial condition and limit the amount of credit extended. However, we generally do not require collateral on accounts receivable. Concentrations of credit risk, with respect to accounts receivable, exist to the extent of
amounts presented in the financial statements. Three customers represented 37%, 33% and 11%, respectively, of total trade accounts receivable at December 31, 2010, and three customers represented 36%, 35% and 17%, respectively, of total trade
accounts receivable at December 31, 2009 No other customer represented more than 10% of accounts receivable at December 31, 2010 or December 31, 2009.

Revenue from customers representing 10% or more of total product revenue during the years ended December 31, 2010, 2009 and 2008 were as follows:



|                                               |  |      |    |   |      |  |    |      |  |  |    |  
|---------------------------------------------- |  | ---- | -- | - | ---- |  | -- | ---- |  |  | -- | -
|Customer                                       |  | 2010 |    |   | 2009 |  |    | 2008 | 
|CuraScript, Inc (formerly Priority Healthcare) |  |      | 33 | % |      |  | 37 | %    |  |  | 39 | %
|Nova Factor                                    |  |      | 27 | % |      |  | 29 | %    |  |  | 29 | %
|Caremark                                       |  |      | 18 | % |      |  | 20 | %    |  |  | 17 | %

17. RELATED PARTY TRANSACTIONS

On October 29, 2004 we entered into an Amended and Restated Standstill Agreement with Warburg Pincus Equity Partners,
L.P. and certain of its affiliates, collectively Warburg Pincus, that permits Warburg Pincus to acquire up to 25% of our outstanding common stock in the open market. Under this agreement, Warburg Pincus may acquire up to 25% of our outstanding
common stock and we have granted Warburg Pincus certain registration rights with respect to its holdings. In exchange for allowing Warburg Pincus to increase its ownership stake, Warburg Pincus has granted the independent members of our board of
directors the right to vote the shares of InterMune common stock owned by Warburg Pincus in excess of 19.9%. In addition, Warburg Pincus has agreed to certain limitations on the manner in which it may dispose of its ownership interest in InterMune.
In connection with this transaction, we have also amended our stockholder Rights Plan to allow Warburg Pincus to acquire up to 25% of our outstanding common stock in open market purchases. Jonathan S. Leff, a member of our board of directors, is a
managing director of Warburg Pincus LLC and a partner



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of Warburg Pincus & Co., which are affiliates of Warburg Pincus Equity Partners, L.P. As of December 31, 2010, Warburg Pincus held approximately 16.8% of our outstanding common
stock.

18. EMPLOYEE SAVINGS PLAN

On May 1, 1999, we adopted a 401(k) defined contribution plan that covers all full time employees, as defined, who fulfill certain length-of-service requirements. Employees may contribute up to the
maximum limit imposed by federal tax law. Beginning in 2005, we began matching employee contributions at a rate of 50% of the first $6,000 per employee contributed each year and have since gradually increased the contribution rate to 50% of the
first $12,000 per employee contributed each year in 2009. Our total matching contributions were $0.5 million each in 2010, 2009 and 2008.

19. GUARANTEES AND INDEMNIFICATIONS

ASC Subtopic No. 460-10, previously FASB Interpretation No. 45, Guarantors Accounting and Disclosure Requirements for Guarantees, including Indirect Guarantees of Indebtedness of
Others(FIN 45), requires that upon issuance of a guarantee, the guarantor must recognize a liability for the fair value of the obligations it assumes under that guarantee.

As permitted under Delaware law and in accordance with our Bylaws, we indemnify our officers and directors for certain events or
occurrences, subject to certain limits, while the officer or director is or was serving at our request in such capacity. We terminate the indemnification agreements with our officers and directors upon the termination of their employment, but the
termination will not affect claims for indemnification relating to events occurring prior to the effective date of termination. The maximum amount of potential future indemnification is unlimited; however, our director and officer insurance policies
reduce our exposure and may enable us to recover a portion of any future amounts paid. Accordingly, we believe the fair value of these indemnification agreements is minimal. Therefore, we have not recorded any liabilities for these agreements as of
December 31, 2010.

20. SUBSEQUENT EVENTS

As of March 1, 2011, the holders of all of our then-outstanding 2011 Notes, approximately $45.0 million in aggregate principal, elected to convert the outstanding 2011 Notes into an aggregate of
2,078,561 shares of our common stock. As a result, there are no 2011 Notes that remain outstanding and we have no further obligations under the indenture governing the 2011 Notes.

In December 2010, the CHMP of the EMA adopted a positive opinion recommending the granting of a marketing authorization for pirfenidone
within the European Union for the treatment of mild to moderate IPF. We received notice of ratification of the opinion by the European Commission in March 2011, which authorizes the marketing of Esbriet (pirfenidone) in all 27 member states of the
European Union. The approved indication is in adults with mild to moderate IPF. In connection with this approval, we are required to make a milestone payment of $20.0 million in the aggregate to Marnac and KDL.



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21. QUARTERLY FINANCIAL DATA (Unaudited)



|                                           |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|------------------------------------------ |  | ---------------------------------------- | ------- | - | ------------- | - | ------- | ------------ |  | - | ------------- | - |  | ---------- | ------- | - |  | - | -------- | -
|                                           |  | FirstQuarter                             |         |   | SecondQuarter |   |         | ThirdQuarter |  |   | FourthQuarter |   |  | Total Year |        
|                                           |  | (In thousands, except per share amounts) |        
|2010                                       |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Revenue, net                               |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Actimmune                                  |  | $                                        | 5,264   |   |               | $ | 5,074   |              |  | $ | 4,836         |   |  | $          | 4,866   |   |  | $ | 20,040   |  
|Collaboration revenue                      |  |                                          | 818     |   |               |   | 818     |              |  |   | 818           |   |  |            | 236,797 |   |  |   | 239,251  |  
|                                           |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Total revenue, net                         |  |                                          | 6,082   |   |               |   | 5,892   |              |  |   | 5,654         |   |  |            | 241,663 |   |  |   | 259,291  |  
|                                           |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Cost of goods sold                         |  |                                          | 2,643   |   |               |   | 1,165   |              |  |   | 1,291         |   |  |            | 1,238   |   |  |   | 6,337    |  
|(Loss ) income from operations             |  |                                          | (32,169 | ) |               |   | (23,990 | )            |  |   | (22,254       | ) |  |            | 207,092 |   |  |   | 128,679  |  
|Net (loss) income                          |  | $                                        | (34,078 | ) |               | $ | (25,345 | )            |  | $ | (24,284       | ) |  | $          | 206,081 |   |  | $ | 122,374  |  
|Basic and diluted (loss) income per share: |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Net (loss) income per share  basic        |  | $                                        | (0.66   | ) |               | $ | (0.46   | )            |  | $ | (0.44         | ) |  | $          | 3.74    |   |  | $ | 2.26     |  
|Net (loss) income per share  diluted      |  | $                                        | (0.66   | ) |               | $ | (0.46   | )            |  | $ | (0.44         | ) |  | $          | 3.34    |   |  | $ | 2.13     |  
|2009                                       |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Revenue, net                               |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Actimmune product sales                    |  | $                                        | 6,032   |   |               | $ | 7,110   |              |  | $ | 6,493         |   |  | $          | 5,793   |   |  | $ | 25,428   |  
|Collaboration revenue                      |  |                                          | 818     |   |               |   | 818     |              |  |   | 20,818        |   |  |            | 818     |   |  |   | 23,272   |  
|                                           |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Total revenue, net                         |  |                                          | 6,850   |   |               |   | 7,928   |              |  |   | 27,311        |   |  |            | 6,611   |   |  |   | 48,700   |  
|                                           |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Cost of goods sold                         |  |                                          | 2,858   |   |               |   | 1,860   |              |  |   | 1,019         |   |  |            | 1,260   |   |  |   | 6,997    |  
|Loss from operations                       |  |                                          | (43,024 | ) |               |   | (25,508 | )            |  |   | (6,037        | ) |  |            | (26,274 | ) |  |   | (100,843 | )
|Net loss                                   |  | $                                        | (42,012 | ) |               | $ | (36,660 | )            |  | $ | (8,771        | ) |  | $          | (28,577 | ) |  | $ | (116,020 | )
|Basic and diluted loss per share:          |  |                                          |         |   |               |   |         |              |  |   |               |   |  |            |         |   |  |   |          |  
|Net loss per share                         |  | $                                        | (1.03   | ) |               | $ | (0.81   | )            |  | $ | (0.19         | ) |  | $          | (0.62   | ) |  | $ | (2.62    | )



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|ITEM 9. | CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURES
|------- | -------------------------------------------------------------------------------------

Not Applicable.



|ITEM 9A. | CONTROLS AND PROCEDURES
|-------- | -----------------------

Evaluation of Disclosure Controls and Procedures. We maintain disclosure controls and procedures, as such term is defined in Rule 13a-15(e) under the Exchange Act, that are
designed to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and that such
information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure. In designing and evaluating our disclosure
controls and procedures, management recognized that disclosure controls and procedures, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the disclosure controls and procedures are
met. Additionally, in designing disclosure controls and procedures, our management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible disclosure controls and procedures. The design of any
disclosure controls and procedures also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions.

Based on their evaluation as of the end of the period covered by this Annual Report on Form 10-K, our Chief Executive Officer
and Chief Financial Officer have concluded that our disclosure controls and procedures were effective at the reasonable assurance level.

Managements Report on Internal Control Over Financial Reporting. Our management is responsible for establishing and maintaining adequate internal control over financial reporting as
defined in Rule 13a-15(f) of the Exchange Act. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are
subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

We assessed the effectiveness of our internal control over financial reporting as of December 31, 2010. In making this assessment, we used the criteria set forth by the Committee of Sponsoring
Organizations of the Treadway Commission in Internal ControlIntegrated Framework. Based on our assessment using those criteria, we concluded that our internal control over financial reporting was effective as of December 31, 2010.

Our independent registered public accounting firm has expressed an opinion on the effectiveness of our internal control over
financial reporting which is included below.

Changes in Internal Control over Financial Reporting. There have
been no changes to our internal controls over financial reporting during the three months ended December 31, 2010 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Limitations on the Effectiveness of Controls. Our management, including the Chief Executive Officer and Chief
Financial Officer, does not expect that our disclosure controls and procedures or our internal control over financial reporting will prevent all error and all fraud. A control system, no matter how well designed and operated, can provide only
reasonable, not absolute, assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of
fraud, if any, within the company have been detected.



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Report of Independent Registered Public Accounting Firm

The Board of Directors and Stockholders of InterMune, Inc.

We have audited InterMune, Inc.s internal control over financial reporting as of December 31, 2010, based on criteria established in Internal ControlIntegrated Framework issued by the
Committee of Sponsoring Organizations of the Treadway Commission (the COSO criteria). InterMune, Inc.s management is responsible for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness
of internal control over financial reporting included in the accompanying Managements Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the companys internal control over financial
reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board
(United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an
understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other
procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A
companys internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with
generally accepted accounting principles. A companys internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect
the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting
principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of
unauthorized acquisition, use or disposition of the companys assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any
evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, InterMune, Inc. maintained, in all material respects, effective internal control over financial reporting as of December 31, 2010,
based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United
States), the consolidated balance sheets of InterMune, Inc. as of December 31, 2010 and 2009, and the related consolidated statements of operations, stockholders equity (deficit), and cash flows for each of the three years in the period
ended December 31, 2010 of InterMune, Inc. and our report dated March 9, 2011 expressed an unqualified opinion thereon.

/s/
Ernst & Young LLP

Palo Alto, California

March 9, 2011



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|ITEM 9B. | OTHER INFORMATION.
|-------- | ------------------

Not applicable.

PART III

Certain information required by Part III is omitted from this Annual Report on Form 10-K because we expect to file with the
U.S. Securities and Exchange Commission a definitive proxy statement pursuant to Regulation 14A in connection with the solicitation of proxies for our Annual Meeting of Stockholders to be held at 10:00 a.m. on May 10, 2011 (the
Proxy Statement) not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K, and certain information included therein is incorporated herein by reference.



|ITEM 10. | DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
|-------- | ------------------------------------------------------

Identification of Directors and Executive Officers

The information
required by this Item with respect to Executive Officers may be found under the caption, Executive Officers of the Registrant at the end of Item 1 of this Annual Report on Form 10-K. The information required by this Item with
respect to Directors, including information with respect to our audit committee financial expert and the identification of our audit committee, is incorporated herein by reference from the information under the caption
Proposal 1  Election of Directors contained in the Proxy Statement.

Section 16(a)
Beneficial Ownership Reporting Compliance

The information required by this Item with respect to compliance with
Section 16(a) of the Exchange Act is incorporated herein by reference from the section captioned Section 16(a) Beneficial Ownership Reporting Compliance contained in the Proxy Statement.

Code of Business Conduct and Ethics

The information required by this Item with respect to our code of ethics is incorporated herein by reference from the section captioned Proposal 1  Election of
Directors  Code of Business Conduct and Ethics contained in the Proxy Statement.



|ITEM 11. | EXECUTIVE COMPENSATION
|-------- | ----------------------

The information required by this Item is incorporated herein by reference to the information under the sections entitled Executive Compensation and Compensation and Governance and
Nominating Committee Interlocks and Insider Participation contained in the Proxy Statement.



|ITEM 12. | SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS
|-------- | ----------------------------------------------------------------------------------------------

The information required by this Item is incorporated herein by reference to the information under the captions Security Ownership
of Certain Beneficial Owners and Management and Equity Compensation Plan Information contained in the Proxy Statement.



|ITEM 13. | CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE
|-------- | -------------------------------------------------------------------------

The information required by this Item is incorporated herein by reference to the information under the caption Executive
Compensation  Certain Relationships and Related Transactions contained in the Proxy Statement.



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|ITEM 14. | PRINCIPAL ACCOUNTANT FEES AND SERVICES
|-------- | --------------------------------------

The information required by this Item is incorporated herein by reference to the information from the Proxy Statement under the section entitled Proposal 2  Ratification of
Selection of Independent Registered Public Accounting Firm.

PART IV



|ITEM 15. | EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
|-------- | ------------------------------------------

(a) The following documents are filed as part of this Annual Report on Form 10-K:

(1) Financial Statements

See Index to Consolidated
Financial Statements in Item 8 of this Annual Report on Form 10-K.

(2) Financial Statement
Schedules

The following financial statement schedule is filed as part of this Annual Report on
Form 10-K. All other financial statement schedules have been omitted because they are either not applicable or the required information has been included in the consolidated financial statements or the notes thereto.

Schedule II

InterMune, Inc.

Valuation and Qualifying Accounts and Reserves

Years ended
December 31, 2010, 2009 and 2008

(in thousands)



|                              |  |                            |    |  |                             |   |     |              |  |   |                       |   |  |   |    | 
|----------------------------- |  | -------------------------- | -- |  | --------------------------- | - | --- | ------------ |  | - | --------------------- | - |  | - | -- | 
|Description                   |  | Balance atBeginning ofYear |    |  | Charged toRevenue orExpense |   |     | Utilizations |  |   | Balance atEnd of Year |  
|Allowance for cash discounts: |  |                            |    |  |                             |   |     |              |  |   |                       |   |  |   |    | 
|Year ended December 31, 2010  |  | $                          | 55 |  |                             | $ | 491 |              |  | $ | (510                  | ) |  | $ | 36 | 
|Year ended December 31, 2009  |  |                            | 58 |  |                             |   | 507 |              |  |   | (510                  | ) |  |   | 55 | 
|Year ended December 31, 2008  |  |                            | 44 |  |                             |   | 666 |              |  |   | (652                  | ) |  |   | 58 | 



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(3) Exhibits



|       |  |                                                                                                                                                                                                                                                
|------ |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Number |  | Description of Document                                                                                                                                                                                                                        
|       | 
|2.1*   |  | Asset Purchase Agreement by and between Registrant and F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., dated as of October 6, 2010 (1)                                                                                                    
|       | 
|3.1    |  | Amended and Restated Certificate of Incorporation of Registrant.(2)                                                                                                                                                                            
|       | 
|3.2    |  | Certificate of Ownership and Merger, dated April 26, 2001.(3)                                                                                                                                                                                  
|       | 
|3.3    |  | Amended and Restated Bylaws of Registrant.(4)                                                                                                                                                                                                  
|       | 
|3.4    |  | Certificate of Amendment of Certificate of Incorporation of Registrant.(5)                                                                                                                                                                     
|       | 
|3.5    |  | Certificate of Amendment of Amended and Restated Certificate of Incorporation of Registrant.(6)                                                                                                                                                
|       | 
|3.6    |  | Registrants Certificate of Designation of Series A Junior Participating Preferred Stock.(7)                                                                                                                                                   
|       | 
|4.1    |  | Specimen Common Stock Certificate.(2)                                                                                                                                                                                                          
|       | 
|4.2    |  | Indenture, dated as of February 17, 2004, between Registrant and The Bank of New York.(8)                                                                                                                                                      
|       | 
|4.3    |  | Registration Rights Agreement, dated as of February 17, 2004, among Registrant, Morgan Stanley & Co. Incorporated, Banc of America Securities LLC, Credit Suisse First
Boston LLC, Harris Nesbitt Corp. and RBC Capital Markets Corporation.(8)
|       | 
|4.4    |  | Indenture, dated as of June 24, 2008, between Registrant and The Bank of New York Trust Company, N.A.(9)                                                                                                                                       
|       | 
|4.5    |  | Form of 5.00% Convertible Senior Note due 2015 (included in Exhibit 4.4).(9)                                                                                                                                                                   
|       | 
|10.1+  |  | Form of Indemnity Agreement.(2)                                                                                                                                                                                                                
|       | 
|10.2+  |  | 1999 Equity Incentive Plan and related documents.(2)                                                                                                                                                                                           
|       | 
|10.3+  |  | Amended and Restated 2000 Equity Incentive Plan and related documents.(10)                                                                                                                                                                     
|       | 
|10.4+  |  | Amended and Restated 2000 Employee Stock Purchase Plan and related documents.(10)                                                                                                                                                              
|       | 
|10.5+  |  | Amended and Restated 2000 Non-Employee Directors Stock Option Plan and related documents.(10)                                                                                                                                                 
|       | 
|10.6   |  | Reserved.                                                                                                                                                                                                                                      
|       | 
|10.7a  |  | Rights Agreement, dated July 17, 2001, between Registrant and Mellon Investor Services LLC.(7)                                                                                                                                                 
|       | 
|10.7b  |  | Amendment, dated October 29, 2004 to Rights Agreement, dated July 17, 2001, between Registrant and Mellon Investor Services LLC.(11)                                                                                                           
|       | 
|10.8   |  | Preliminary Stipulation of Settlement Agreement, dated May 6, 2005.(12)                                                                                                                                                                        
|       | 
|10.9+  |  | Form of Change of Control Provisions for Officers.(13)                                                                                                                                                                                         
|       | 
|10.10  |  | Assignment and Option Agreement, dated June 23, 2000, between Registrant and Connetics Corporation.(14)                                                                                                                                        
|       | 
|10.11  |  | Consent to Assignment Agreement, dated June 23, 2000, between Registrant, Connetics Corporation and Genentech, Inc.(14)                                                                                                                        
|       | 
|10.12  |  | Notice re: Return of Rights to Gamma Interferon for Treatment of Infectious Diseases in Japan, dated July 25, 2000, between Registrant and Genentech, Inc.(14)                                                                                 
|       | 
|10.13  |  | Form of Common Stock Purchase Agreement, dated August 11, 2000, between the Company and Investors.(15)                                                                                                                                         



103



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|        |  |                                                                                                                                                                                                                
|------- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Number  |  | Description of Document                                                                                                                                                                                        
|        | 
|10.14a  |  | Lease Agreement, dated December 18, 2000, between Registrant and GAL-BRISBANE, L.P.(16)                                                                                                                        
|        | 
|10.14b  |  | First Amendment to Brisbane Technology Park Lease, effective as of December 18, 2000, between Registrant and GAL-BRISBANE, L.P.(16)                                                                            
|        | 
|10.14c  |  | Second Amendment dated May 3, 2006 to Brisbane Technology Park Lease, effective as of December 18, 2000, between Registrant and BMR-BAYSHORE BOULEVARD LLC (successor-in-interest to
GAL-BRISBANE, L.P.)(17)   
|        | 
|10.14d  |  | Third Amendment dated August 23, 2006 to Brisbane Technology Park Lease, effective as of December 18, 2000, between Registrant and BMR-BAYSHORE BOULEVARD LLC (successor-in-interest
to GAL-BRISBANE, L.P.)(17)
|        | 
|10.14e  |  | Fourth Amendment dated July 16, 2010 to Brisbane Technology Park Lease, effective as of December 18, 2000, between Registrant and BMR-BAYSHORE BOULEVARD LLC (successor-in-interest
to GAL-BRISBANE, L.P.)(17) 
|        | 
|10.15a* |  | Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International GmbH.(18)                                                                                 
|        | 
|10.15b  |  | Letter Amendment, dated August 1, 2001, to Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International
GmbH.(19)                                      
|        | 
|10.15c  |  | Letter Amendment, dated May 28, 2002, to Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International
GmbH.(20)                                        
|        | 
|10.15d  |  | Letter Amendment, dated July 1, 2002, to Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International
GmbH.(20)                                        
|        | 
|10.15e* |  | Amendment No. 4, dated January 28, 2003, to Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International
GmbH.(21)                                     
|        | 
|10.16a  |  | Amendment No. 5, dated January 25, 2001, to License Agreement, dated May 5, 1998, between Registrant and Genentech, Inc.(18)                                                                                   
|        | 
|10.16b  |  | Amendment No. 6, dated February 27, 2006, to License Agreement dated May 5, 1998, between Registrant and Genentech, Inc.(22)                                                                                   
|        | 
|10.17a+ |  | Employment Offer Letter, dated April 5, 2002, between Registrant and Marianne Armstrong, Ph.D.(23)                                                                                                             
|        | 
|10.17b+ |  | Bonus Plan Memorandum, dated April 18, 2002, from Registrant to Marianne Armstrong, Ph.D.(23)                                                                                                                  
|        | 
|10.17c+ |  | Amendment to Offer Letter re Severance Pay and Change in Control, dated August 18, 2004, between Registrant and Marianne Armstrong, Ph.D.(23)                                                                  
|        | 
|10.18   |  | Reserved.                                                                                                                                                                                                      
|        | 
|10.19+  |  | Employment Offer Letter, dated September 24, 2003, between Registrant and Daniel G. Welch.(25)                                                                                                                 
|        | 
|10.20   |  | Reserved.                                                                                                                                                                                                      
|        | 
|10.21a  |  | Amended and Restated Standstill Agreement, dated October 29, 2004, among Registrant, Warburg Pincus & Co. and certain affiliates of Warburg Pincus &
Co.(11)                                                   
|        | 
|10.21b  |  | Amendment, dated January 19, 2010, to Amended and Restated Standstill Agreement, dated October 29, 2004, among Registrant, Warburg Pincus & Co. and certain affiliates
of Warburg Pincus & Co.(26)             
|        | 
|10.22   |  | Registration Rights Agreement, dated October 29, 2004, among Registrant, Warburg Pincus & Co. and certain affiliates of Warburg Pincus &
Co.(11)                                                               
|        | 
|10.23a+ |  | Employment Offer Letter Agreement, dated June 13, 2001, between Registrant and Williamson
Bradford, M.D., Ph.D.(23)                                                                                            



104



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|        |  |                                                                                                                                                                                         
|------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Number  |  | Description of Document                                                                                                                                                                 
|        | 
|10.23b+ |  | Amendment to Offer Letter re Severance Pay and Change in Control, dated July 27, 2004, between Registrant and Williamson Bradford, M.D., Ph.D.(23)                                      
|        | 
|10.24a+ |  | Employment Offer Letter Agreement, dated June 1, 2001, between Registrant and Steven Porter, M.D., Ph.D. (23)                                                                           
|        | 
|10.24b+ |  | Amendment to Offer Letter re Severance Pay and Change in Control, dated July 26, 2004, between Registrant and Steven Porter, M.D., Ph.D.(23)                                            
|        | 
|10.25a+ |  | Employment Offer Letter Agreement, dated August 9, 2004, between Registrant and Robin Steele.(23)                                                                                       
|        | 
|10.26a+ |  | Employment Offer Letter Agreement, dated March 24, 2004, between Registrant and Howard A. Simon, Esq. (33)                                                                              
|        | 
|10.26b+ |  | Amendment to Offer Letter re Severance Pay and Change in Control, dated July 27, 2004, between Registrant and Howard A. Simon, Esq.(23)                                                 
|        | 
|10.27*  |  | Product Acquisition Agreement, dated November 28, 2005, between Registrant and Valeant Pharmaceuticals North America.(27)                                                               
|        | 
|10.28*  |  | Asset Purchase Agreement dated December 23, 2005, between Registrant and Targanta Therapeutics Corporation.(22)                                                                         
|        | 
|10.29a* |  | Exclusive License and Collaboration Agreement dated October 16, 2006 between Registrant and Hoffmann-La Roche, Inc. and F. Hoffmann-La Roche Ltd.(28)                                   
|        | 
|10.29b* |  | First Amendment to Exclusive License and Collaboration Agreement effective October 16, 2008 between Registrant and Hoffmann-La Roche, Inc. and F. Hoffmann-La Roche
Ltd.(29)            
|        | 
|10.29c* |  | Second Amendment to the Exclusive License and Collaboration Agreement, dated as of October 16, 2006, by and between Hoffman-La Roche Inc., F. Hoffmann-La Roche Ltd, and
Registrant.(30)
|        | 
|10.29d* |  | Third Amendment to the Exclusive License and Collaboration Agreement, dated as of April 30, 2010, by and between Hoffman-La Roche Inc., F. Hoffmann-La Roche Ltd, and
Registrant.(31)   
|        | 
|10.30   |  | Deferred Prosecution Agreement between Registrant and the United States Attorneys Office for the Northern District of California.(28)                                                  
|        | 
|10.31   |  | Civil Settlement Agreement between Registrant and the United States Department of Justice and the United States Attorneys Office for the Northern District of
California.(28)          
|        | 
|10.32   |  | Corporate Integrity Agreement between Registrant and the Office of the Inspector General of the United States Department of Health and Human Services.(28)                              
|        | 
|10.33+  |  | Employment Offer Letter Agreement, dated July 26, 2006, between Registrant and John C. Hodgman. (33)                                                                                    
|        | 
|10.34*  |  | Termination Agreement dated June 6, 2007 between Registrant and Boehringer Ingelheim Austria GmbH.(32)                                                                                  
|        | 
|10.35*  |  | Supply Agreement dated June 29, 2007 between Registrant and Boehringer Ingelheim Austria GmbH.(32)                                                                                      
|        | 
|10.36   |  | Letter Amendment dated December 19, 2007 to Product Acquisition Agreement dated November 28, 2005 between Registrant and Valeant Pharmaceuticals North America.(10)                     
|        | 
|10.37*  |  | Asset Purchase Agreement, dated November 19, 2007, among Registrant, Marnac, Inc., and Dr. Solomon B. Margolin.(10)                                                                     
|        | 
|10.38*  |  | Asset Purchase Agreement, dated November 21, 2007, among Registrant, KDL GmbH, and Dr. Shitotomo Yamauchi.(10)                                                                          
|        | 
|10.39*  |  | License Agreement, dated August 24, 2004, between Registrant and Chiron Corporation.(10)                                                                                                



105



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|        |  |                                                                                                                                                                                                                             
|------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Number  |  | Description of Document                                                                                                                                                                                                     
|        | 
|10.40a* |  | Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                                                                           
|        | 
|10.40b* |  | Amendment No. 1, dated May 8, 2003, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                                
|        | 
|10.40c* |  | Amendment No. 2, dated January 7, 2004, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                            
|        | 
|10.40d* |  | Amendment No. 3, dated September 10, 2004, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                         
|        | 
|10.40e* |  | Amendment No. 4, dated December 7, 2004, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                           
|        | 
|10.40f* |  | Amendment No. 5, dated June 30, 2005, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                              
|        | 
|10.40g* |  | Amendment No. 6, dated February 3, 2006, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                           
|        | 
|10.40h* |  | Amendment No. 7, dated June 28, 2006, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                              
|        | 
|10.41*  |  | Letter Agreement, dated March 10, 2005, between Registrant and Array BioPharma Inc.(10)                                                                                                                                     
|        | 
|10.42*  |  | API Supply Agreement dated December 17, 2008 among Registrant, on the one hand, and Signa S.A. de C.V., ACIC Fine Chemicals Inc., and ACIC Europe Limited, on the other
hand.(29)                                           
|        | 
|10.43   |  | Form of State Settlement Agreement and Release with various states in connection with Deferred Prosecution Agreement between Registrant and the United States Attorneys Office
for the Northern District of California.(29)
|        | 
|10.45*  |  | Commercial Manufacturing Agreement, dated September 10, 2009, by and between Registrant and Catalent Pharma Solutions, LLC.(30)                                                                                             
|        | 
|10.46a+ |  | Employment Offer Letter Agreement, dated October 30, 2009, between Registrant and Giacomo di Nepi. (33)                                                                                                                     
|        | 
|10.46b+ |  | Employment Letter Arrangement, dated December 28, 2010, between Registrant and Giacomo di Nepi. (33)                                                                                                                        
|        | 
|10.46c+ |  | Employment Contract, dated December 28, 2010, between InterMune Schweiz AG and Giacomo di Nepi. (33)                                                                                                                        
|        | 
|10.47a+ |  | Employment Offer Letter Agreement, dated May 29, 2003, between Registrant and Scott Seiwert, Ph.D. (33)                                                                                                                     
|        | 
|10.47b+ |  | Second Amendment to Offer Letter re Severance Pay and Change in Control, dated March 26, 2009, between Registrant and Scott Seiwert, Ph.D. (33)                                                                             
|        | 
|10.48   |  | Employment Offer Letter Agreement, dated November 11, 2009, between Registrant and Alan H. Cohen, M.D. (33)                                                                                                                 
|        | 
|21.1    |  | List of Subsidiaries. (33)                                                                                                                                                                                                  
|        | 
|23.1    |  | Consent of Independent Registered Public Accounting Firm. (33)                                                                                                                                                              
|        | 
|24.1    |  | Power of Attorney (included on the signature pages hereto)                                                                                                                                                                  
|        | 
|31.1    |  | Certification required by Rule 13a-14(a) or Rule 15d-14(a). (33)                                                                                                                                                            
|        | 
|31.2    |  | Certification required by Rule 13a-14(a) or Rule 15d-14(a). (33)                                                                                                                                                            
|        | 
|32.1   |  | Certification required by Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350).
(33)                                                                     



106



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##### Table of Contents

|* | Confidential treatment has been granted with respect to certain portions of this exhibit. Omitted portions have been filed separately with the Securities and Exchange
Commission.
|- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|+ | Management contract or compensation plan or arrangement.
|- | --------------------------------------------------------

| | This certification accompanies the Periodic Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed filed by the
Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
|- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(1) | Filed as an exhibit to the Registrants Current Report on Form 8-K on October 12, 2010.
|--- | ---------------------------------------------------------------------------------------

|(2) | Filed as an exhibit to the Registrants Registration Statement on Form S-1 filed with the Securities and Exchange Commission on February 2, 2000
(No. 333-96029), as amended by Amendment No. 1 filed with the Commission on February 18, 2000, as amended by Amendment No. 2 filed with the Commission on March 6, 2000, as amended by Amendment No. 3 filed with the
Commission on March 22, 2000, as amended by Amendment No. 4 filed with the Commission on March 23, 2000 and as amended by Amendment No. 5 filed with the Commission on March 23, 2000.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2001.
|--- | ----------------------------------------------------------------------------------------------------------

|(4) | Filed as an exhibit to the Registrants Current Report on Form 8-K on March 24, 2010.
|--- | -------------------------------------------------------------------------------------

|(5) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2003.
|--- | ----------------------------------------------------------------------------------------------------------

|(6) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q filed for the quarter ended June 30, 2004.
|--- | ----------------------------------------------------------------------------------------------------------------

|(7) | Filed as an exhibit to the Registrants Current Report on Form 8-K on July 18, 2001.
|--- | ------------------------------------------------------------------------------------

|(8) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2003, as amended.
|--- | --------------------------------------------------------------------------------------------------------------------

|(9) | Filed as an exhibit to the Registrants Current Report on Form 8-K on June 24, 2008.
|--- | ------------------------------------------------------------------------------------

|(10) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2007.
|---- | --------------------------------------------------------------------------------------------------------

|(11) | Filed as an exhibit to the Registrants Current Report on Form 8-K on November 4, 2004.
|---- | ---------------------------------------------------------------------------------------

|(12) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2005.
|---- | -----------------------------------------------------------------------------------------------------------------

|(13) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2000.
|---- | -----------------------------------------------------------------------------------------------------------------

|(14) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2000.
|---- | ----------------------------------------------------------------------------------------------------------

|(15) | Filed as an exhibit to the Registrants Current Report on Form 8-K on August 23, 2000.
|---- | --------------------------------------------------------------------------------------

|(16) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2000.
|---- | --------------------------------------------------------------------------------------------------------

|(17) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended September 30, 2010.
|---- | ---------------------------------------------------------------------------------------------------------------

|(18) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2001.
|---- | -----------------------------------------------------------------------------------------------------------------

|(19) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended September 30, 2001.
|---- | ---------------------------------------------------------------------------------------------------------------

|(20) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2002.
|---- | ----------------------------------------------------------------------------------------------------------

|(21) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended March 31, 2003.
|---- | -----------------------------------------------------------------------------------------------------------

|(22) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2005.
|---- | --------------------------------------------------------------------------------------------------------

|(23) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2004.
|---- | --------------------------------------------------------------------------------------------------------

|(24) | Filed as an exhibit to the Registrants Current Report on Form 8-K on May 25, 2007.
|---- | -----------------------------------------------------------------------------------

|(25) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended September 30, 2003.
|---- | ---------------------------------------------------------------------------------------------------------------

|(26) | Filed as an exhibit to the Registrants Current Report on Form 8-K on January 19, 2010.
|---- | ---------------------------------------------------------------------------------------

|(27) | Incorporated by reference to Exhibit 2.1 of Form 8-K (File No. 001-11397) filed by Valeant Pharmaceuticals International, the parent company of Valeant
Pharmaceuticals North America on January 5, 2006.
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(28) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2006.
|---- | --------------------------------------------------------------------------------------------------------

|(29) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2008.
|---- | --------------------------------------------------------------------------------------------------------





107



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##### Table of Contents

|(30) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2009.
|---- | --------------------------------------------------------------------------------------------------------

|(31) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2010.
|---- | ----------------------------------------------------------------------------------------------------------

|(32) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2007.
|---- | ----------------------------------------------------------------------------------------------------------

|(33) | Filed herewith.
|---- | ---------------

(c) Exhibits

See Item 15(a) above.

(d) Financial Statement Schedules

See Item 15(a) above.



108



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##### Table of Contents

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Act of 1934, the registrant has duly caused this Report to be
signed on its behalf by the undersigned, thereunto duly authorized.



INTERMUNE, INC.By:

/s/     JOHN C.
HODGMANJohn C. HodgmanSenior Vice President of Finance Administrationand Chief Financial Officer


Dated: March 8, 2011

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints John C. Hodgman and Daniel G.
Welch, and each of them, as his true and lawful attorneys-in-fact and agents, with full power of substitution for him, and in his name in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the
same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act
and thing requisite and necessary to be done therewith, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, and any of them or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange
Act of 1934, the following persons on behalf of the registrant and in the capacities and on the dates indicated have signed this Report below:



|                                             |  |                                                                                                           |  |              
|-------------------------------------------- |  | --------------------------------------------------------------------------------------------------------- |  | -------------
|Signatures                                   |  | Title                                                                                                     |  | Date         
|                                             |  |                                                                                                          
|/s/    DANIEL G.
WELCH Daniel G. Welch       |  | Chairman of the Board of Directors, President and Chief
Executive Officer (Principal Executive Officer)   |  | March 8, 2011
|                                             |  |                                                                                                          
|/s/    JOHN C.
HODGMAN John C. Hodgman       |  | Senior Vice President of Finance Administration and
Chief Financial Officer
(Principal Financial Officer) |  | March 8, 2011
|                                             |  |                                                                                                          
|/s/    BRUCE W.
TOMLINSON Bruce W. Tomlinson |  | Vice President, Controller and Principal Accounting
Officer                                               |  | March 8, 2011
|                                             |  |                                                                                                          
|/s/    LOUIS
DRAPEAU Louis Drapeau           |  | Director                                                                                                  |  | March 8, 2011
|                                             |  |                                                                                                          
|/s/    LARS
EKMAN Lars Ekman                 |  | Lead Independent Director                                                                                 |  | March 8, 2011
|                                             |  |                                                                                                          
|/s/    JAMES I.
HEALY James I. Healy         |  | Director                                                                                                  |  | March 8, 2011
|                                             |  |                                                                                                          
|/s/    DAVID S.
KABAKOFF David S. Kabakoff   |  | Director                                                                                                  |  | March 8, 2011



109



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|                                         |  |          |  |              
|---------------------------------------- |  | -------- |  | -------------
|                                         |  |         
|/s/    JONATHAN S.
LEFF Jonathan S. Leff |  | Director |  | March 8, 2011



110



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EXHIBIT INDEX



|       |  |                                                                                                                                                                                                                                                
|------ |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Number |  | Description of Document                                                                                                                                                                                                                        
|       | 
|2.1*   |  | Asset Purchase Agreement by and between Registrant and F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., dated as of October 6, 2010 (1)                                                                                                    
|       | 
|3.1    |  | Amended and Restated Certificate of Incorporation of Registrant.(2)                                                                                                                                                                            
|       | 
|3.2    |  | Certificate of Ownership and Merger, dated April 26, 2001.(3)                                                                                                                                                                                  
|       | 
|3.3    |  | Amended and Restated Bylaws of Registrant.(4)                                                                                                                                                                                                  
|       | 
|3.4    |  | Certificate of Amendment of Certificate of Incorporation of Registrant.(5)                                                                                                                                                                     
|       | 
|3.5    |  | Certificate of Amendment of Amended and Restated Certificate of Incorporation of Registrant.(6)                                                                                                                                                
|       | 
|3.6    |  | Registrants Certificate of Designation of Series A Junior Participating Preferred Stock.(7)                                                                                                                                                   
|       | 
|4.1    |  | Specimen Common Stock Certificate.(2)                                                                                                                                                                                                          
|       | 
|4.2    |  | Indenture, dated as of February 17, 2004, between Registrant and The Bank of New York.(8)                                                                                                                                                      
|       | 
|4.3    |  | Registration Rights Agreement, dated as of February 17, 2004, among Registrant, Morgan Stanley & Co. Incorporated, Banc of America Securities LLC, Credit Suisse First
Boston LLC, Harris Nesbitt Corp. and RBC Capital Markets Corporation.(8)
|       | 
|4.4    |  | Indenture, dated as of June 24, 2008, between Registrant and The Bank of New York Trust Company, N.A.(9)                                                                                                                                       
|       | 
|4.5    |  | Form of 5.00% Convertible Senior Note due 2015 (included in Exhibit 4.4).(9)                                                                                                                                                                   
|       | 
|10.1+  |  | Form of Indemnity Agreement.(2)                                                                                                                                                                                                                
|       | 
|10.2+  |  | 1999 Equity Incentive Plan and related documents.(2)                                                                                                                                                                                           
|       | 
|10.3+  |  | Amended and Restated 2000 Equity Incentive Plan and related documents.(10)                                                                                                                                                                     
|       | 
|10.4+  |  | Amended and Restated 2000 Employee Stock Purchase Plan and related documents.(10)                                                                                                                                                              
|       | 
|10.5+  |  | Amended and Restated 2000 Non-Employee Directors Stock Option Plan and related documents.(10)                                                                                                                                                 
|       | 
|10.6   |  | Reserved.                                                                                                                                                                                                                                      
|       | 
|10.7a  |  | Rights Agreement, dated July 17, 2001, between Registrant and Mellon Investor Services LLC.(7)                                                                                                                                                 
|       | 
|10.7b  |  | Amendment, dated October 29, 2004 to Rights Agreement, dated July 17, 2001, between Registrant and Mellon Investor Services LLC.(11)                                                                                                           
|       | 
|10.8   |  | Preliminary Stipulation of Settlement Agreement, dated May 6, 2005.(12)                                                                                                                                                                        
|       | 
|10.9+  |  | Form of Change of Control Provisions for Officers.(13)                                                                                                                                                                                         
|       | 
|10.10  |  | Assignment and Option Agreement, dated June 23, 2000, between Registrant and Connetics Corporation.(14)                                                                                                                                        
|       | 
|10.11  |  | Consent to Assignment Agreement, dated June 23, 2000, between Registrant, Connetics Corporation and Genentech, Inc.(14)                                                                                                                        
|       | 
|10.12  |  | Notice re: Return of Rights to Gamma Interferon for Treatment of Infectious Diseases in Japan, dated July 25, 2000, between Registrant and Genentech, Inc.(14)                                                                                 
|       | 
|10.13  |  | Form of Common Stock Purchase Agreement, dated August 11, 2000, between the Company and Investors.(15)                                                                                                                                         



111



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|        |  |                                                                                                                                                                                                                
|------- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Number  |  | Description of Document                                                                                                                                                                                        
|        | 
|10.14a  |  | Lease Agreement, dated December 18, 2000, between Registrant and GAL-BRISBANE, L.P.(16)                                                                                                                        
|        | 
|10.14b  |  | First Amendment to Brisbane Technology Park Lease, effective as of December 18, 2000, between Registrant and GAL-BRISBANE, L.P.(16)                                                                            
|        | 
|10.14c  |  | Second Amendment dated May 3, 2006 to Brisbane Technology Park Lease, effective as of December 18, 2000, between Registrant and BMR-BAYSHORE BOULEVARD LLC (successor-in-interest to
GAL-BRISBANE, L.P.)(17)   
|        | 
|10.14d  |  | Third Amendment dated August 23, 2006 to Brisbane Technology Park Lease, effective as of December 18, 2000, between Registrant and BMR-BAYSHORE BOULEVARD LLC (successor-in-interest
to GAL-BRISBANE, L.P.)(17)
|        | 
|10.14e  |  | Fourth Amendment dated July 16, 2010 to Brisbane Technology Park Lease, effective as of December 18, 2000, between Registrant and BMR-BAYSHORE BOULEVARD LLC (successor-in-interest
to GAL-BRISBANE, L.P.)(17) 
|        | 
|10.15a* |  | Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International GmbH.(18)                                                                                 
|        | 
|10.15b  |  | Letter Amendment, dated August 1, 2001, to Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International
GmbH.(19)                                      
|        | 
|10.15c  |  | Letter Amendment, dated May 28, 2002, to Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International
GmbH.(20)                                        
|        | 
|10.15d  |  | Letter Amendment, dated July 1, 2002, to Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International
GmbH.(20)                                        
|        | 
|10.15e* |  | Amendment No. 4, dated January 28, 2003, to Development and Marketing Agreement, dated March 23, 2001, between Registrant and Boehringer Ingelheim International
GmbH.(21)                                     
|        | 
|10.16a  |  | Amendment No. 5, dated January 25, 2001, to License Agreement, dated May 5, 1998, between Registrant and Genentech, Inc.(18)                                                                                   
|        | 
|10.16b  |  | Amendment No. 6, dated February 27, 2006, to License Agreement dated May 5, 1998, between Registrant and Genentech, Inc.(22)                                                                                   
|        | 
|10.17a+ |  | Employment Offer Letter, dated April 5, 2002, between Registrant and Marianne Armstrong, Ph.D.(23)                                                                                                             
|        | 
|10.17b+ |  | Bonus Plan Memorandum, dated April 18, 2002, from Registrant to Marianne Armstrong, Ph.D.(23)                                                                                                                  
|        | 
|10.17c+ |  | Amendment to Offer Letter re Severance Pay and Change in Control, dated August 18, 2004, between Registrant and Marianne Armstrong, Ph.D.(23)                                                                  
|        | 
|10.18   |  | Reserved.                                                                                                                                                                                                      
|        | 
|10.19+  |  | Employment Offer Letter, dated September 24, 2003, between Registrant and Daniel G. Welch.(25)                                                                                                                 
|        | 
|10.20   |  | Reserved.                                                                                                                                                                                                      
|        | 
|10.21a  |  | Amended and Restated Standstill Agreement, dated October 29, 2004, among Registrant, Warburg Pincus & Co. and certain affiliates of Warburg Pincus &
Co.(11)                                                   
|        | 
|10.21b  |  | Amendment, dated January 19, 2010, to Amended and Restated Standstill Agreement, dated October 29, 2004, among Registrant, Warburg Pincus & Co. and certain affiliates
of Warburg Pincus & Co.(26)             
|        | 
|10.22   |  | Registration Rights Agreement, dated October 29, 2004, among Registrant, Warburg Pincus & Co. and certain affiliates of Warburg Pincus &
Co.(11)                                                               
|        | 
|10.23a+ |  | Employment Offer Letter Agreement, dated June 13, 2001, between Registrant and Williamson
Bradford, M.D., Ph.D.(23)                                                                                            



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|        |  |                                                                                                                                                                                         
|------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Number  |  | Description of Document                                                                                                                                                                 
|        | 
|10.23b+ |  | Amendment to Offer Letter re Severance Pay and Change in Control, dated July 27, 2004, between Registrant and Williamson Bradford, M.D., Ph.D.(23)                                      
|        | 
|10.24a+ |  | Employment Offer Letter Agreement, dated June 1, 2001, between Registrant and Steven Porter, M.D., Ph.D. (23)                                                                           
|        | 
|10.24b+ |  | Amendment to Offer Letter re Severance Pay and Change in Control, dated July 26, 2004, between Registrant and Steven Porter, M.D., Ph.D.(23)                                            
|        | 
|10.25a+ |  | Employment Offer Letter Agreement, dated August 9, 2004, between Registrant and Robin Steele.(23)                                                                                       
|        | 
|10.26a+ |  | Employment Offer Letter Agreement, dated March 24, 2004, between Registrant and Howard A. Simon, Esq. (33)                                                                              
|        | 
|10.26b+ |  | Amendment to Offer Letter re Severance Pay and Change in Control, dated July 27, 2004, between Registrant and Howard A. Simon, Esq.(23)                                                 
|        | 
|10.27*  |  | Product Acquisition Agreement, dated November 28, 2005, between Registrant and Valeant Pharmaceuticals North America.(27)                                                               
|        | 
|10.28*  |  | Asset Purchase Agreement dated December 23, 2005, between Registrant and Targanta Therapeutics Corporation.(22)                                                                         
|        | 
|10.29a* |  | Exclusive License and Collaboration Agreement dated October 16, 2006 between Registrant and Hoffmann-La Roche, Inc. and F. Hoffmann-La Roche Ltd.(28)                                   
|        | 
|10.29b* |  | First Amendment to Exclusive License and Collaboration Agreement effective October 16, 2008 between Registrant and Hoffmann-La Roche, Inc. and F. Hoffmann-La Roche
Ltd.(29)            
|        | 
|10.29c* |  | Second Amendment to the Exclusive License and Collaboration Agreement, dated as of October 16, 2006, by and between Hoffman-La Roche Inc., F. Hoffmann-La Roche Ltd, and
Registrant.(30)
|        | 
|10.29d* |  | Third Amendment to the Exclusive License and Collaboration Agreement, dated as of April 30, 2010, by and between Hoffman-La Roche Inc., F. Hoffmann-La Roche Ltd, and
Registrant.(31)   
|        | 
|10.30   |  | Deferred Prosecution Agreement between Registrant and the United States Attorneys Office for the Northern District of California.(28)                                                  
|        | 
|10.31   |  | Civil Settlement Agreement between Registrant and the United States Department of Justice and the United States Attorneys Office for the Northern District of
California.(28)          
|        | 
|10.32   |  | Corporate Integrity Agreement between Registrant and the Office of the Inspector General of the United States Department of Health and Human Services.(28)                              
|        | 
|10.33+  |  | Employment Offer Letter Agreement, dated July 26, 2006, between Registrant and John C. Hodgman. (33)                                                                                    
|        | 
|10.34*  |  | Termination Agreement dated June 6, 2007 between Registrant and Boehringer Ingelheim Austria GmbH.(32)                                                                                  
|        | 
|10.35*  |  | Supply Agreement dated June 29, 2007 between Registrant and Boehringer Ingelheim Austria GmbH.(32)                                                                                      
|        | 
|10.36   |  | Letter Amendment dated December 19, 2007 to Product Acquisition Agreement dated November 28, 2005 between Registrant and Valeant Pharmaceuticals North America.(10)                     
|        | 
|10.37*  |  | Asset Purchase Agreement, dated November 19, 2007, among Registrant, Marnac, Inc., and Dr. Solomon B. Margolin.(10)                                                                     
|        | 
|10.38*  |  | Asset Purchase Agreement, dated November 21, 2007, among Registrant, KDL GmbH, and Dr. Shitotomo Yamauchi.(10)                                                                          
|        | 
|10.39*  |  | License Agreement, dated August 24, 2004, between Registrant and Chiron Corporation.(10)                                                                                                



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|        |  |                                                                                                                                                                                                                             
|------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|Number  |  | Description of Document                                                                                                                                                                                                     
|        | 
|10.40a* |  | Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                                                                           
|        | 
|10.40b* |  | Amendment No. 1, dated May 8, 2003, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                                
|        | 
|10.40c* |  | Amendment No. 2, dated January 7, 2004, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                            
|        | 
|10.40d* |  | Amendment No. 3, dated September 10, 2004, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                         
|        | 
|10.40e* |  | Amendment No. 4, dated December 7, 2004, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                           
|        | 
|10.40f* |  | Amendment No. 5, dated June 30, 2005, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                              
|        | 
|10.40g* |  | Amendment No. 6, dated February 3, 2006, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                           
|        | 
|10.40h* |  | Amendment No. 7, dated June 28, 2006, to the Drug Discovery Collaboration Agreement, dated September 13, 2002, between Registrant and Array BioPharma Inc.(10)                                                              
|        | 
|10.41*  |  | Letter Agreement, dated March 10, 2005, between Registrant and Array BioPharma Inc.(10)                                                                                                                                     
|        | 
|10.42*  |  | API Supply Agreement dated December 17, 2008 among Registrant, on the one hand, and Signa S.A. de C.V., ACIC Fine Chemicals Inc., and ACIC Europe Limited, on the other
hand.(29)                                           
|        | 
|10.43   |  | Form of State Settlement Agreement and Release with various states in connection with Deferred Prosecution Agreement between Registrant and the United States Attorneys Office
for the Northern District of California.(29)
|        | 
|10.45*  |  | Commercial Manufacturing Agreement, dated September 10, 2009, by and between Registrant and Catalent Pharma Solutions, LLC.(30)                                                                                             
|        | 
|10.46a+ |  | Employment Offer Letter Agreement, dated October 30, 2009, between Registrant and Giacomo di Nepi. (33)                                                                                                                     
|        | 
|10.46b+ |  | Employment Letter Arrangement, dated December 28, 2010, between Registrant and Giacomo di Nepi. (33)                                                                                                                        
|        | 
|10.46c+ |  | Employment Contract, dated December 28, 2010, between InterMune Schweiz AG and Giacomo di Nepi. (33)                                                                                                                        
|        | 
|10.47a+ |  | Employment Offer Letter Agreement, dated May 29, 2003, between Registrant and Scott Seiwert, Ph.D. (33)                                                                                                                     
|        | 
|10.47b+ |  | Second Amendment to Offer Letter re Severance Pay and Change in Control, dated March 26, 2009, between Registrant and Scott Seiwert, Ph.D. (33)                                                                             
|        | 
|10.48   |  | Employment Offer Letter Agreement, dated November 11, 2009, between Registrant and Alan H. Cohen, M.D. (33)                                                                                                                 
|        | 
|21.1    |  | List of Subsidiaries. (33)                                                                                                                                                                                                  
|        | 
|23.1    |  | Consent of Independent Registered Public Accounting Firm. (33)                                                                                                                                                              
|        | 
|24.1    |  | Power of Attorney (included on the signature pages hereto)                                                                                                                                                                  
|        | 
|31.1    |  | Certification required by Rule 13a-14(a) or Rule 15d-14(a). (33)                                                                                                                                                            
|        | 
|31.2    |  | Certification required by Rule 13a-14(a) or Rule 15d-14(a). (33)                                                                                                                                                            
|        | 
|32.1   |  | Certification required by Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350).
(33)                                                                     



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|* | Confidential treatment has been granted with respect to certain portions of this exhibit. Omitted portions have been filed separately with the Securities and Exchange
Commission.
|- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|+ | Management contract or compensation plan or arrangement.
|- | --------------------------------------------------------

| | This certification accompanies the Periodic Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed filed by the
Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
|- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(1) | Filed as an exhibit to the Registrants Current Report on Form 8-K on October 12, 2010.
|--- | ---------------------------------------------------------------------------------------

|(2) | Filed as an exhibit to the Registrants Registration Statement on Form S-1 filed with the Securities and Exchange Commission on February 2, 2000
(No. 333-96029), as amended by Amendment No. 1 filed with the Commission on February 18, 2000, as amended by Amendment No. 2 filed with the Commission on March 6, 2000, as amended by Amendment No. 3 filed with the
Commission on March 22, 2000, as amended by Amendment No. 4 filed with the Commission on March 23, 2000 and as amended by Amendment No. 5 filed with the Commission on March 23, 2000.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(3) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2001.
|--- | ----------------------------------------------------------------------------------------------------------

|(4) | Filed as an exhibit to the Registrants Current Report on Form 8-K on March 24, 2010.
|--- | -------------------------------------------------------------------------------------

|(5) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2003.
|--- | ----------------------------------------------------------------------------------------------------------

|(6) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q filed for the quarter ended June 30, 2004.
|--- | ----------------------------------------------------------------------------------------------------------------

|(7) | Filed as an exhibit to the Registrants Current Report on Form 8-K on July 18, 2001.
|--- | ------------------------------------------------------------------------------------

|(8) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2003, as amended.
|--- | --------------------------------------------------------------------------------------------------------------------

|(9) | Filed as an exhibit to the Registrants Current Report on Form 8-K on June 24, 2008.
|--- | ------------------------------------------------------------------------------------

|(10) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2007.
|---- | --------------------------------------------------------------------------------------------------------

|(11) | Filed as an exhibit to the Registrants Current Report on Form 8-K on November 4, 2004.
|---- | ---------------------------------------------------------------------------------------

|(12) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2005.
|---- | -----------------------------------------------------------------------------------------------------------------

|(13) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2000.
|---- | -----------------------------------------------------------------------------------------------------------------

|(14) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2000.
|---- | ----------------------------------------------------------------------------------------------------------

|(15) | Filed as an exhibit to the Registrants Current Report on Form 8-K on August 23, 2000.
|---- | --------------------------------------------------------------------------------------

|(16) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2000.
|---- | --------------------------------------------------------------------------------------------------------

|(17) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended September 30, 2010.
|---- | ---------------------------------------------------------------------------------------------------------------

|(18) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q filed for the quarter ended March 31, 2001.
|---- | -----------------------------------------------------------------------------------------------------------------

|(19) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended September 30, 2001.
|---- | ---------------------------------------------------------------------------------------------------------------

|(20) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2002.
|---- | ----------------------------------------------------------------------------------------------------------

|(21) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended March 31, 2003.
|---- | -----------------------------------------------------------------------------------------------------------

|(22) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2005.
|---- | --------------------------------------------------------------------------------------------------------

|(23) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2004.
|---- | --------------------------------------------------------------------------------------------------------

|(24) | Filed as an exhibit to the Registrants Current Report on Form 8-K on May 25, 2007.
|---- | -----------------------------------------------------------------------------------

|(25) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended September 30, 2003.
|---- | ---------------------------------------------------------------------------------------------------------------

|(26) | Filed as an exhibit to the Registrants Current Report on Form 8-K on January 19, 2010.
|---- | ---------------------------------------------------------------------------------------

|(27) | Incorporated by reference to Exhibit 2.1 of Form 8-K (File No. 001-11397) filed by Valeant Pharmaceuticals International, the parent company of Valeant
Pharmaceuticals North America on January 5, 2006.
|---- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(28) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2006.
|---- | --------------------------------------------------------------------------------------------------------

|(29) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2008.
|---- | --------------------------------------------------------------------------------------------------------



115



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|(30) | Filed as an exhibit to the Registrants Annual Report on Form 10-K for the year ended December 31, 2009.
|---- | --------------------------------------------------------------------------------------------------------

|(31) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2010.
|---- | ----------------------------------------------------------------------------------------------------------

|(32) | Filed as an exhibit to the Registrants Quarterly Report on Form 10-Q for the quarter ended June 30, 2007.
|---- | ----------------------------------------------------------------------------------------------------------

|(33) | Filed herewith.
|---- | ---------------



116