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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549



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FORM 10-Q



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



For the quarterly period ended September 30,
2003



| ̈ | 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 0-23155



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TRIMERIS, INC.

(Exact name of registrant as specified in its charter)



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|Delaware                                                       |  | 56-1808663                          
|-------------------------------------------------------------- |  | ------------------------------------
|(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)



3518 Westgate Drive

Durham, North Carolina 27707

(Address of principal executive offices, including zip code)



Registrants telephone number, including area code: (919) 419-6050



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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.    x  Yes ̈No



Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule
12b-2 of the Exchange Act). x  Yes ̈No



The number of shares outstanding of the registrants common stock as of November 10,
2003 was 21,528,450.



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##### Table of Contents

TRIMERIS, INC.

(A Development Stage Company)

FORM 10-Q



For the Nine Months Ended September 30, 2003



INDEX



|               |  |                                                                                                      |  | Page
|-------------- |  | ---------------------------------------------------------------------------------------------------- |  | ----
|PART I.        |  | FINANCIAL INFORMATION                                                                                |  |     
|               |  |                                                                                                     
|Item 1.        |  | Financial Statements                                                                                 |  |     
|               |  |                                                                                                     
|               |  | Balance Sheets as of December 31, 2002 and September 30, 2003 (unaudited)                            |  | 1   
|               |  |                                                                                                     
|               |  | Statements of Operations (unaudited) for the Three and Nine Months Ended September 30, 2002 and 2003 |  | 2   
|               |  |                                                                                                     
|               |  | Statements of Cash Flows (unaudited) for the Nine Months Ended September 30, 2002 and 2003           |  | 3   
|               |  |                                                                                                     
|               |  | Notes to Financial Statements (unaudited)                                                            |  | 4   
|               |  |                                                                                                     
|Item 2.        |  | Managements Discussion and Analysis of Financial Condition and Results of Operations                |  | 9   
|               |  |                                                                                                     
|Item 3.        |  | Quantitative and Qualitative Disclosures About Market Risk                                           |  | 26  
|               |  |                                                                                                     
|Item 4.        |  | Controls and Procedures                                                                              |  | 27  
|               |  |                                                                                                     
|PART II.       |  | OTHER INFORMATION                                                                                    |  |     
|               |  |                                                                                                     
|Item 6.        |  | Exhibits and Reports on Form 8-K                                                                     |  | 27  
|               | 
|Signature Page |  | 28                                                                                                  
|               | 
|Exhibit Index  |  | 29                                                                                                  



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##### Table of Contents

PART I. FINANCIAL INFORMATION



Item 1. Financial Statements



TRIMERIS, INC.

BALANCE SHEETS

(in thousands, except par value)



|                                                                                                                                                                        |  | December 31,2002 |          |   | September 30,2003 |  
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ---------------- | -------- | - | ----------------- | -
|                                                                                                                                                                        |  |                  |          |   | (unaudited)       |  
|Assets                                                                                                                                                                  |  |                  |          |   |                   |  
|Current assets:                                                                                                                                                         |  |                  |          |   |                   |  
|Cash and cash equivalents                                                                                                                                               |  | $                | 119,729  |   |                   | $
|Short-term investments                                                                                                                                                  |  |                  | 29,453   |   |                   |  
|Accounts receivable                                                                                                                                                     |  |                  | 1        |   |                   |  
|Prepaid expenses                                                                                                                                                        |  |                  | 1,130    |   |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Total current assets                                                                                                                                                    |  |                  | 150,313  |   |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Property, furniture and equipment, net                                                                                                                                  |  |                  | 2,816    |   |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Other assets:                                                                                                                                                           |  |                  |          |   |                   |  
|Patent costs, net                                                                                                                                                       |  |                  | 1,245    |   |                   |  
|Equipment deposits                                                                                                                                                      |  |                  | 165      |   |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Total other assets                                                                                                                                                      |  |                  | 1,410    |   |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Total assets                                                                                                                                                            |  | $                | 154,539  |   |                   | $
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Liabilities and Stockholders Equity                                                                                                                                    |  |                  |          |   |                   |  
|Current liabilities:                                                                                                                                                    |  |                  |          |   |                   |  
|Accounts payable                                                                                                                                                        |  | $                | 1,492    |   |                   | $
|Accounts payable  Roche                                                                                                                                                |  |                  | 15,249   |   |                   |  
|Current installments of capital lease obligations                                                                                                                       |  |                  | 694      |   |                   |  
|Accrued compensation                                                                                                                                                    |  |                  | 2,967    |   |                   |  
|Deferred revenue  Roche                                                                                                                                                |  |                  | 620      |   |                   |  
|Accrued expenses                                                                                                                                                        |  |                  | 902      |   |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Total current liabilities                                                                                                                                               |  |                  | 21,924   |   |                   |  
|Obligations under capital leases, excluding current installments                                                                                                        |  |                  | 321      |   |                   |  
|Deferred revenue - Roche                                                                                                                                                |  |                  | 2,167    |   |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Total liabilities                                                                                                                                                       |  |                  | 24,412   |   |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Commitments and contingencies                                                                                                                                           |  |                  |          |   |                   |  
|Stockholders equity:                                                                                                                                                   |  |                  |          |   |                   |  
|Series A, B, C, and D preferred stock at $.001 par value per share, 10,000 shares authorized, zero shares issued and outstanding
at December 31, 2002 and June 30, 2003 |  |                  |         |   |                   |  
|Common stock at $.001 par value per share, 60,000 shares authorized, 21,366 and 21,525 shares issued and outstanding at December
31, 2002 and September 30, 2003        |  |                  | 21       |   |                   |  
|Additional paid-in capital                                                                                                                                              |  |                  | 395,536  |   |                   |  
|Accumulated deficit                                                                                                                                                     |  |                  | (264,573 | ) |                   |  
|Deferred compensation                                                                                                                                                   |  |                  | (824     | ) |                   |  
|Accumulated other comprehensive income (loss)                                                                                                                           |  |                  | (33      | ) |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Total stockholders equity                                                                                                                                              |  |                  | 130,127  |   |                   |  
|                                                                                                                                                                        |  |                  |          |   |                   |  
|Total liabilities and stockholders equity                                                                                                                              |  | $                | 154,539  |   |                   | $
|                                                                                                                                                                        |  |                  |          |   |                   |  



See accompanying notes
to financial statements.



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TRIMERIS, INC.

STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(unaudited)





|                                                       |  | Three Months EndedSeptember 30, |         |   | Nine Months EndedSeptember 30, |  
|------------------------------------------------------ |  | ------------------------------- | ------- | - | ------------------------------ | -
|                                                       |  | 2002                            |         |   | 2003                           |  
|Revenue:                                               |  |                                 |         |   |                                |  
|Milestone revenue                                      |  | $                               | 326     |   |                                | $
|Royalty revenue                                        |  |                                 |        |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|Total revenue                                          |  |                                 | 326     |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|Operating expenses:                                    |  |                                 |         |   |                                |  
|Collaboration loss                                     |  |                                 |        |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|Marketing expense                                      |  |                                 | 3,640   |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|Research and development:                              |  |                                 |         |   |                                |  
|Non-cash compensation                                  |  |                                 | 98      |   |                                |  
|Other research and development expense                 |  |                                 | 12,232  |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|Total research and development expense                 |  |                                 | 12,330  |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|General and administrative:                            |  |                                 |         |   |                                |  
|Non-cash compensation                                  |  |                                 | 414     |   |                                |  
|Other general and administrative expense               |  |                                 | 2,502   |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|Total general and administrative expense               |  |                                 | 2,916   |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|Total operating expenses                               |  |                                 | 18,886  |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|Operating loss                                         |  |                                 | (18,560 | ) |                                |  
|                                                       |  |                                 |         |   |                                |  
|Other income (expense):                                |  |                                 |         |   |                                |  
|Interest income                                        |  |                                 | 446     |   |                                |  
|Interest expense                                       |  |                                 | (24     | ) |                                |  
|                                                       |  |                                 |         |   |                                |  
|                                                       |  |                                 | 422     |   |                                |  
|                                                       |  |                                 |         |   |                                |  
|Net loss                                               |  | $                               | (18,138 | ) |                                | $
|                                                       |  |                                 |         |   |                                |  
|Basic and diluted net loss per share                   |  | $                               | (0.97   | ) |                                | $
|                                                       |  |                                 |         |   |                                |  
|Weighted average shares used in per share computations |  |                                 | 18,776  |   |                                |  
|                                                       |  |                                 |         |   |                                |  



See accompanying notes
to financial statements.



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TRIMERIS, INC.

STATEMENTS OF CASH FLOWS

(in thousands, unaudited)



|                                                                            |  | Nine Months EndedSeptember 30, |        
|--------------------------------------------------------------------------- |  | ------------------------------ | -------
|                                                                            |  | 2002                           |        
|Cash flows from operating activities:                                       |  |                                |        
|Net loss                                                                    |  | $                              | (52,533
|Adjustments to reconcile net loss to net cash used by operating activities: |  |                                |        
|Depreciation                                                                |  |                                | 1,484  
|Other amortization                                                          |  |                                | 46     
|Amortization of deferred revenue  Roche                                    |  |                                | (978   
|Non-cash compensation                                                       |  |                                | 1,458  
|Restricted stock donation                                                   |  |                                | 79     
|Patent costs expensed                                                       |  |                                | 551    
|Changes in operating assets and liabilities:                                |  |                                |        
|Accounts receivable                                                         |  |                                | (3     
|Prepaid expenses                                                            |  |                                | (120   
|Other assets                                                                |  |                                | 30     
|Accounts payable                                                            |  |                                | (942   
|Accounts payable  Roche                                                    |  |                                | (3,874 
|Accrued compensation                                                        |  |                                | 704    
|Accrued expenses                                                            |  |                                | (17    
|Deferred revenue  Roche                                                    |  |                                |       
|                                                                            |  |                                |        
|Net cash used by operating activities                                       |  |                                | (54,115
|                                                                            |  |                                |        
|Cash flows from investing activities:                                       |  |                                |        
|Sales of short-term investments, net                                        |  |                                | 18,853 
|Purchases of property and equipment                                         |  |                                | (854   
|Patent costs                                                                |  |                                | (303   
|                                                                            |  |                                |        
|Net cash provided by investing activities                                   |  |                                | 17,696 
|                                                                            |  |                                |        
|Cash flows from financing activities:                                       |  |                                |        
|Principal payments under capital lease obligations                          |  |                                | (709   
|Proceeds from issuance of common stock                                      |  |                                | 40,765 
|Proceeds from sale of options                                               |  |                                | 388    
|Proceeds from exercise of stock options                                     |  |                                | 931    
|Proceeds from employee stock purchase plan exercise                         |  |                                | 295    
|                                                                            |  |                                |        
|Net cash provided by financing activities                                   |  |                                | 41,670 
|                                                                            |  |                                |        
|Net increase (decrease) in cash and cash equivalents                        |  |                                | 5,251  
|Cash and cash equivalents, beginning of period                              |  |                                | 22,288 
|                                                                            |  |                                |        
|Cash and cash equivalents, end of period                                    |  | $                              | 27,539 
|                                                                            |  |                                |        



See accompanying notes
to financial statements.



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TRIMERIS, INC.

NOTES TO FINANCIAL STATEMENTS

(unaudited)



1. BASIS OF PRESENTATION



Trimeris, Inc. (the Company) was incorporated on January 7, 1993 in Delaware, to discover and develop novel therapeutic agents that block viral infection by inhibiting viral fusion with host cells. Prior to April 1, 2003, the
financial statements were prepared in accordance with Statement of Financial Accounting Standards (SFAS) No. 7, Accounting and Reporting by Development Stage Enterprises, to recognize the fact that the Company was devoting
substantially all of its efforts to establishing a new business. Principal operations commenced with the commercial launch of Fuzeon® on March 27, 2003, and significant revenue was generated from the sale of Fuzeon during the three months ended
June 30, 2003. As a result, beginning on April 1, 2003, the Company no longer prepares its financial statements in accordance with SFAS No. 7.



The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of
America and applicable Securities and Exchange Commission (the SEC) regulations for interim financial information. Certain information and footnote disclosures normally included in financial statements prepared in accordance with
accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the SEC rules and regulations. In the opinion of management, all adjustments (consisting only of normal recurring adjustments)
necessary for a fair presentation of financial position and results of operations have been made. Operating results for interim periods are not necessarily indicative of results which may be expected for a full year. The information included in this
Form 10-Q should be read in conjunction with the Risk Factors and Managements Discussion and Analysis of Financial Condition and Results of Operations sections and the 2002 financial statements and notes thereto
included in the Companys Annual Report on Form 10-K for the year ended December 31, 2002 filed with the SEC on March 27, 2003.



The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 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 reported amounts of revenues and expenses during the reporting
period. Actual results could differ from those estimates.



2. BASIC NET INCOME (LOSS) PER SHARE



In accordance with SFAS No. 128, Earnings Per Share, basic loss per common share is calculated by dividing net loss by the weighted-average number of common shares outstanding for the period after certain adjustments described
below. Diluted net income per common share reflects the maximum dilutive effect of common stock issuable upon exercise of stock options, stock warrants, and conversion of preferred stock. Diluted net loss per common share is not shown, as common
equivalent shares from stock options, and stock warrants, would have an antidilutive effect. At September 30, 2002, there were 2,439,000 options to purchase common stock outstanding, 3,000 shares of unvested restricted stock outstanding, and 362,000
warrants to purchase common stock outstanding. At September 30, 2003, there were 2,645,000 options to purchase common stock outstanding and 362,000 warrants to purchase common stock outstanding.



3. STATEMENTS OF CASH FLOWS



Interest of approximately $88,000 and $35,000 was paid during the nine
months ended September 30, 2002 and 2003, respectively. Unrealized gains on short-term investments totaled $35,000 during the nine month period ended September 30, 2003.



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4. STOCKHOLDERS EQUITY



In October 1997, the Company closed its initial public offering of common
stock at $12 per share. The net proceeds of the offering, including the proceeds received in connection with the exercise of the underwriters over-allotment option which closed in November 1997, were approximately $34.5 million after deducting
applicable issuance costs and expenses of approximately $3.4 million. In connection with the public offering, all the outstanding preferred stock was converted into 6,261,615 shares of the Companys common stock.



In June 1999, the Company closed a public offering of common stock at $11.75
per share. The net proceeds of the offering, including the proceeds received in connection with the exercise of the underwriters over-allotment option, were approximately $31.4 million after deducting applicable issuance costs and expenses of
approximately $2.4 million.



In February 2000, the Company
closed a private placement of 1.75 million shares of common stock at $40.50 per share. The net proceeds of the offering were approximately $66.6 million after deducting applicable issuance costs and expenses of approximately $4.2 million.



In May 2001, the Company closed a private placement of
approximately 1.4 million shares of common stock at $33.00 per share. The net proceeds of the offering were approximately $43.4 million after deducting applicable issuance costs and expenses of approximately $2.7 million.



In January 2002, the Company closed a private placement of approximately 1.3
million shares of common stock at $34.00 per share. The net proceeds of the offering were approximately $40.8 million after deducting applicable issuance costs and expenses of approximately $2.0 million.



In October 2002, the Company closed a public offering of approximately 2.5
million shares of common stock at $45.25 per share. The net proceeds of the offering, including the proceeds received in connection with the exercise of the underwriters over-allotment option, were approximately $106.7 million after deducting
applicable issuance costs and expenses of approximately $6.6 million.



In July 2000, the Company entered into a derivative transaction with a financial institution that could have been settled by selling up to 300,000 shares of its stock to the financial institution at prices significantly higher than the
market price per share of the Companys stock at the inception of the transaction. The Company received $2.8 million in proceeds that were accounted for as an increase to additional paid-in capital in accordance with EITF Issue No. 00-19.
Concurrently, the Company entered into a second derivative transaction with the same financial institution on shares of its common stock at no net premium to either party. These contracts expired unexercised during July 2001.



In September 2001 and April 2002, the Company entered into derivative
transactions with a financial institution that could have been settled by selling up to a total of 307,000 shares of its stock to the financial institution at prices significantly higher than the market price per share of the Companys stock at
the inception of the transaction. The Company received approximately $344,000 and $388,000, respectively, in proceeds that were accounted for as an increase to additional paid-in capital in accordance with Emerging Issues Task Force
(EITF) Issue No. 00-19, Determination of Whether Share Settlement Is Within the Control of the Company for Purposes of Applying EITF Issue No. 96-13, Accounting for Derivative Financial Instruments Indexed to, and Potentially
Settled in, a Companys Own Stock. Alternatively, the Company had the option to settle these contracts by making a cash payment to the financial institution for the underlying value of the derivative contracts to the financial institution
on the settlement date. The Companys intent was to settle the contracts, if exercised, by issuing shares. All outstanding derivative transactions have expired unexercised.



Other changes in additional paid-in capital during the nine months ended September 30, 2003 was $38,000 debited to
additional paid-in capital related to non-cash compensation expense. Other significant changes in additional paid-in capital during the nine months ended September 30, 2002 were $56,000 credited to additional paid-in capital related to non-cash
compensation expense, $79,000 credited to additional paid-in capital related to a donation of restricted stock and $164,000 credited to additional paid-in capital related to a restricted stock grant.



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5. ROCHE COLLABORATION



In July 1999, the Company announced an agreement with F. Hoffmann-La Roche Ltd., or Roche, to develop and market T-20,
currently known as Fuzeon, whose generic name is enfuvirtide, and T-1249 worldwide. In the United States and Canada, the Company and Roche will share equally development expenses and profits for Fuzeon and T-1249. Outside of these two countries,
Roche will fund all development costs and pay the Company royalties on net sales of these products. Roche made a nonrefundable initial cash payment to the Company of $10 million during 1999, and a milestone payment of $2 million in 2000. The Company
recorded a $8 million milestone in March 2003, a $5 million milestone in May 2003, and a $2.5 million milestone in June 2003. Roche will provide up to an additional $35.5 million in cash upon achievement of developmental, regulatory and commercial
milestones. This agreement with Roche grants them an exclusive, world-wide license for Fuzeon and T-1249, and certain other compounds. Under this agreement with Roche, a joint management committee consisting of members from Trimeris and Roche
oversees the strategy for the collaboration. Roche may terminate its license for a particular country in its sole discretion with advance notice. This agreement with Roche gives Roche significant control over important aspects of the
commercialization of Fuzeon and our other drug candidates, including but not limited to pricing, sales force activities, and promotional activities.



In July 1999, the Company granted Roche a warrant to purchase 362,000 shares of common stock at a purchase price of $20.72 per share. The warrant is
exercisable prior to the tenth annual anniversary of the grant date and was not exercised as of September 30, 2003. The fair value of the warrant of $5.4 million was credited to additional paid-in capital in 1999, and as a reduction of the $10
million up-front payment received from Roche. The value was calculated using the Black-Scholes option-pricing model using the following assumptions: estimated dividend yield of 0%; expected stock price volatility of 86.00%; risk-free interest rate
of 5.20%; and expected option life of ten years.



In June 2001,
the Company announced a research agreement with Roche to discover, develop and commercialize novel generations of HIV fusion inhibitor peptides. Roche and Trimeris will equally fund worldwide research, development and commercialization costs, as
well as share equally in profits from worldwide sales of new HIV fusion inhibitor peptides discovered after July 1, 1999. The joint research obligations under the agreement expired in January 2003. The renewal of this agreement is currently being
negotiated.



Product sales of Fuzeon began in the United States
on March 27, 2003. Under the collaboration agreement with Roche, the Company shares profits equally from the sale of Fuzeon in the United States and Canada with Roche, which is reported as collaboration income (loss) in the Statements of Operations.
Collaboration income (loss) is calculated as follows: Total gross sales of Fuzeon in the United States and Canada is reduced by any discounts or rebates resulting in total net sales. Net sales is reduced by costs of goods sold resulting in gross
margin. Gross margin is reduced by selling and marketing expenses related to the sale of Fuzeon, resulting in operating income or loss. The Companys 50% share of the operating income or loss is reported as collaboration income or loss. Total
net sales of Fuzeon in the United States were $15.0 million during the nine months ended September 30, 2003. During the nine months ended September 30, 2003, sales and marketing expenses exceeded the gross margin from the sale of Fuzeon resulting in
the Companys 50% share of operating loss from the sale of Fuzeon in the United States of $15.4 million. Roche has entered into an exclusive distribution arrangement with Chronimed, Inc. (Chronimed) to distribute Fuzeon in the
United States. This exclusive arrangement terminates on March 27, 2004, unless renewed. Revenue from product sales is recognized when title and risk of loss has passed to Chronimed, which is when Chronimed allocates drug for shipment to a patient.



6. COMPREHENSIVE LOSS



SFAS No. 130, Reporting Comprehensive Income, establishes rules
for the reporting and display of comprehensive income or loss and its components. SFAS No. 130 requires that unrealized gains or losses on the Companys available-for-sale securities be included in other comprehensive income. Comprehensive
income (loss) totaled ($50,574,000) for the nine months ended September 30, 2003. Comprehensive income (loss) totaled ($52,670,000) for the nine months ended September 30, 2002. For the Company, other comprehensive income consists of unrealized
gains or losses on securities available for sale.



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##### Table of Contents

7. STOCK BASED COMPENSATION



SFAS No. 123, Accounting for Stock-Based Compensation
encourages, but does not require companies to record compensation cost for stock-based employee compensation plans at fair value. The Company has chosen to continue to account for employee stock-based compensation using the method prescribed in
Accounting Principles Board (APB) Opinion No. 25, Accounting for Stock Issued to Employees, and related Interpretations. Accordingly, compensation cost for stock options is measured as the excess, if any, of the quoted market
price of the Companys stock at the date of the grant over the amount an employee must pay to acquire the stock.



Compensation costs for stock options granted to non-employees are accounted for in accordance with SFAS No. 123 and EITF 96-18, Accounting for
Equity Instruments That Are Issued to Other Than Employees for Acquiring, or in Conjunction with Selling, Goods or Services, which requires that compensation be measured at the end of each reporting period for changes in the fair value of the
Companys common stock until the options are vested.



SFAS
No. 123 permits entities to recognize as expense over the vesting period the fair value of all stock-based awards on the date of grant. Alternatively, SFAS No. 123 also allows entities to continue to apply the provisions of APB Opinion No. 25 and
provide pro forma net income and pro forma earnings per share disclosures for employee stock option grants as if the fair-value-based method defined in SFAS No. 123 had been applied. The Company has elected to continue to apply the provisions of APB
Opinion No. 25. Had the Company determined compensation expense based on the fair value at the grant date for its stock-based plans under SFAS No. 123, the Companys net loss and basic loss per share would have been increased to the pro forma
amounts indicated below for the nine months ended September 30 (in thousands, except per share data):



|                                                                                                         |  | Three Months EndedSeptember 30, |         |   | Nine months EndedSeptember 30, |  
|-------------------------------------------------------------------------------------------------------- |  | ------------------------------- | ------- | - | ------------------------------ | -
|                                                                                                         |  | 2002                            |         |   | 2003                           |  
|Net loss:                                                                                                |  |                                 |         |   |                                |  
|As reported                                                                                              |  | $                               | (18,138 | ) |                                | $
|Compensation cost recorded under APB Opinion No. 25                                                      |  |                                 | 498     |   |                                |  
|Compensation cost resulting from common stock options, restricted stock and employee stock purchase plan |  |                                 | (3,107  | ) |                                |  
|                                                                                                         |  |                                 |         |   |                                |  
|Pro forma                                                                                                |  | $                               | (20,747 | ) |                                | $
|                                                                                                         |  |                                 |         |   |                                |  
|Basic and diluted loss per share:                                                                        |  |                                 |         |   |                                |  
|As reported                                                                                              |  | $                               | (0.97   | ) |                                | $
|Pro forma                                                                                                |  | $                               | (1.10   | ) |                                | $



The fair value of
common stock options is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions used:



|                                                      |  | 2002    |  | 2003   
|----------------------------------------------------- |  | ------- |  | -------
|Estimated dividend yield                              |  | 0%      |  | 0%     
|Expected stock price volatility                       |  | 65%     |  | 40%-50%
|Risk-free interest rate                               |  | 4%      |  | 2%     
|Expected life of options                              |  | 5 years |  | 5 years
|Expected life of employee stock purchase plan options |  | 2 years |  | 2 years



In December 2002, the
Financial Accounting Standards Board issued SFAS No. 148, Accounting for Stock-Based CompensationTransition and Disclosure, an amendment of FASB Statement No. 123. SFAS No. 148 amends SFAS No. 123 to provide alternative methods of
transition for a voluntary change to the fair value method of accounting for stock-based employee compensation. In addition, SFAS No. 148 amends the disclosure requirements of SFAS No. 123 to require prominent disclosures in both annual and interim
financial statements. Certain of the disclosure modifications are required for fiscal years ending after December 15, 2002 and are included above.



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8. COMMITMENTS AND CONTINGENCIES



The Company is involved in certain claims arising in the ordinary course of
business. In the opinion of management, the ultimate disposition of these matters will not have a material adverse effect on the financial position or results of operations of the Company.



As of September 30, 2003, the Company had commitments of approximately $1.6
million to purchase product candidate materials and fund various clinical studies over the next 15 months contingent on delivery of the materials or performance of the services. Substantially all of these expenditures will be shared equally by Roche
under the Companys collaboration agreement. Under this collaboration agreement, Trimeris and Roche are obligated to share equally the future development expenses for Fuzeon and T-1249 for the United States and Canada.



The Company entered into a letter of intent that contemplates the
construction of a building by a third party, that upon completion would be leased by the Company from the third party. During the three months ended June 30, 2003, additional effort on this project was suspended, and $925,000 of costs related to
this project incurred prior to June 30, 2003, that the Company is responsible for under the letter of intent, were charged to expense.



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Item 2. Managements Discussion and Analysis of Financial Condition and Results of Operations



This discussion of our financial condition and the results of operations should be read together with the financial statements and notes contained
elsewhere in this Form 10-Q. Certain statements in this section and other sections of this Form 10-Q are forward-looking. While we believe these statements are accurate, our business is dependent on many factors, some of which are discussed in the
Risk Factors and Business sections of our Annual Report on Form 10-K for the year ended December 31, 2002 filed with the SEC on March 27, 2003. These factors include, but are not limited to:



| |  | that we are a development stage company that has sustained losses since our inception, and expect our losses to continue;
| | - | -------------------------------------------------------------------------------------------------------------------------



| |  | that if we are unable to commercialize Fuzeon, our lead drug candidate, our business will be materially harmed;
| | - | ---------------------------------------------------------------------------------------------------------------



| |  | that our drugs may not achieve market acceptance;
| | - | -------------------------------------------------



| |  | that if Roche does not meet its contractual obligations to us, our research and development efforts and the regulatory approval and commercialization of our drug candidates could be
delayed or otherwise materially and adversely affected;
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that if sufficient amounts of our drug candidates cannot be manufactured on a cost-effective basis, our financial condition and results of operations will be materially and
adversely affected;
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that even if we are successful in developing a commercially viable drug, in order to become profitable we will need to maintain arrangements with third parties for the sale,
marketing and distribution of our drug candidates or expend significant resources to develop these capabilities;
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that we may not receive all necessary regulatory approvals for Fuzeon or our other drug candidates or approvals may be delayed;
| | - | -------------------------------------------------------------------------------------------------------------------------------



| |  | that we are dependent on the successful outcome of clinical trials for our drug candidates;
| | - | -------------------------------------------------------------------------------------------



| |  | that obtaining regulatory approvals and maintaining compliance with government regulations will entail significant costs that could harm our ability to achieve profitability;
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that our business is based on a novel technology called fusion inhibition, and unexpected side effects or other characteristics of this technology may delay or otherwise adversely
affect the development, regulatory approval and/or commercialization of our drug candidates;
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that failure to raise additional capital necessary to support our development programs and expand our operations could lower our revenues and reduce our ability to compete;
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that if we cannot maintain commercial manufacturing agreements with third parties on acceptable terms, or if these third parties do not perform as agreed, the commercial development
of our drug candidates could be delayed or otherwise materially and adversely affected;
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that if Roche or our manufacturing partners do not maintain good manufacturing practices, it could negatively impact our ability to obtain regulatory approvals and commercialize our
drug candidates;
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that HIV is likely to develop resistance to Fuzeon and our other drug candidates, which could adversely affect demand for those drug candidates and harm our competitive position;
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that our internal research programs and our efforts to obtain rights to new products from third parties may not yield potential products for clinical development, which would
adversely affect any future revenues;
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that we depend on patents and proprietary rights, which may offer only limited protection against infringement, and if we are unable to protect our patents and proprietary rights,
our assets and business could be materially harmed;
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that the intellectual property of our competitors or other third parties may prevent us from developing or commercializing our drug candidates;
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------



| |  | that we face intense competition in our efforts to develop commercially successful drugs in the biopharmaceutical industry and if we are unable to compete successfully, our business
will suffer;
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that uncertainty relating to third-party reimbursement and health care reform measures could limit the amount we will be able to charge for our drugs and adversely affect our
results of operations;
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that if an accident or injury involving hazardous materials occurs, we could incur fines or liability, which could materially and adversely affect our business and our reputation;
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that if the testing or use of our drug candidates harms people, we could face costly and damaging product liability claims far in excess of our liability and indemnification
coverage;
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that our quarterly operating results are subject to fluctuations, and if our operating results for a particular period deviate from the levels expected by securities analysts and
investors, it could adversely affect the market price of our common stock;
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that if we lose any of our executive management or other key employees, we will have difficulty replacing them, and if we cannot attract and retain qualified personnel on acceptable
terms, the development of our drug candidates and our financial position may suffer;
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | that any additional financing we obtain may result in dilution to our stockholders, restrictions on our operating flexibility, or the transfer of particular rights to our
technologies or drug candidates; and
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  | that our charter requires us to indemnify our officers and directors to the fullest extent permitted by law, which obligates us to make substantial payments and to incur significant
insurance-related expenses.
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Many of these
factors are beyond our control and any of these and other factors could cause actual clinical and financial results to differ materially from the forward-looking statements made in this Form 10-Q. The results of our previous clinical trials are not
necessarily indicative of the results of future clinical trials. Please read the  Risk Factors section of our Annual Report on Form 10-K for the year ended December 31, 2002. We undertake no obligation to release publicly the results of
any revisions to the statements contained in this Form 10-Q to reflect events or circumstances that occur subsequent to the date hereof.



Critical Accounting Policies



We believe the following accounting policies are the most critical to our financial statements. We believe they are important to the presentation of our
financial condition, and require the highest degree of management judgment to make the estimates necessary to ensure their fair presentation.



Revenue Recognition Under Staff Accounting Bulletin No. 101



Staff Accounting Bulletin (SAB) No. 101, Revenue Recognition in Financial Statements summarizes the
SECs views in applying generally accepted accounting principles to revenue recognition in financial statements. SAB No. 101 establishes the SECs view that it is not appropriate to recognize revenue until all of the following criteria are
met: persuasive evidence that an arrangement exists; delivery has occurred or services have been rendered; the sellers price to the buyer is fixed or determinable; and collectibility is reasonably assured. Further, SAB No. 101 requires that
both title and the risks and rewards of ownership be transferred to the buyer before revenue can be recognized. We believe that our revenue recognition policies are in compliance with SAB No. 101.



Milestone Revenue



SAB No. 101 provides guidance that it is appropriate to recognize revenue
related to license and milestone payments over the research and development term of a collaboration agreement. The primary estimates we make in connection with the application of this policy is the length of the period of the research and
development under our collaboration agreement with Roche, and the estimated commercial life of Fuzeon. In the event our judgment of the length of these terms changes, the milestone revenue to be recognized under our collaboration with Roche would
change prospectively in accordance with APB No. 20, Accounting Changes. If either term is expected to be longer, the amount of revenue recognized would be less per quarter than currently being recognized. If either term is expected to be
shorter, the amount of revenue recognized would be more per quarter than currently being recognized.



During the fourth quarter of 2002, we increased our estimate of the length of this development term based on the expected development schedule of T-1249,
the final compound covered by our collaboration agreement with Roche. Our current expectations for development of T-1249 would result in the end of the development period ranging from late 2005 to mid 2007. This estimate is subject to significant
variability since T-1249 has only completed two Phase I/II trials. Any future change in our judgment of the length of this research and development term will result in a prospective change in the milestone revenue to be recognized under our
collaboration with Roche. Any future research and development milestone payments received from Roche under our collaboration agreement will be amortized from the date the milestone is achieved to the end of the remaining research and development
term. We recorded a $8 million milestone in March 2003 and a $5 million milestone in May 2003. These milestones will be amortized on a straight line basis from the date recorded to mid 2007. We also recorded a $2.5 million milestone related to
Fuzeon manufacturing in June 2003 that will be amortized on a straight line basis from the date recorded through the end of the current patent life of Fuzeon, which is our current estimate of the commercial life of Fuzeon.



Royalty Revenue



Under our collaboration agreement with Roche, we receive a royalty based on
net sales of Fuzeon outside the United States and Canada. These royalties are recognized in the quarter the sales occur. Royalties of $234,000 and $321,000 were recognized as revenue during the three and nine months ended September 30, 2003,
respectively.



Collaboration Income (Loss)



Under our collaboration agreement with Roche, we share profits equally
from the sale of Fuzeon in the United States and Canada and we will receive a royalty on the net sales of Fuzeon outside of these two countries. Collaboration income (loss) represents our 50% share of total gross sales of Fuzeon in the United States
and Canada, less any discounts or rebates, less cost of



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goods sold, less sales and marketing expenses. Product sales of Fuzeon began in the United States on March 27, 2003. During the nine months ended September
30, 2003, sales and marketing expenses exceeded the gross margin from the sale of Fuzeon resulting in a net loss from the sale of Fuzeon. Roche has entered into an exclusive distribution arrangement with Chronimed to distribute Fuzeon in the United
States. This exclusive arrangement terminates on March 27, 2004, unless renewed. Revenue from product sales is recognized when title and risk of loss has passed to Chronimed, which is when Chronimed allocates drug for shipment to a patient. Roche
prepares its estimates for sales returns and allowances, discounts and rebates based primarily on their historical experience with other anti-HIV drugs and their estimates of the payor mix for Fuzeon, updated for changes in facts and circumstances
on a quarterly basis. If actual results differ from these estimates, these estimates will be adjusted which could have an effect on results from operations in the period of adjustment.



Calculation of Compensation Costs for Stock Options Granted to Non-Employees



Compensation costs for stock options granted to non-employees are accounted
for in accordance with SFAS No. 123 and EITF 96-18, which require that such compensation costs be measured at the end of each reporting period to account for changes in the fair value of the Companys common stock until the options are vested.
These costs are non-cash charges resulting from stock option grants to non-employees. The primary estimate we make in connection with the calculation of this expense is the future volatility of our stock price used to calculate the value of the
stock options in the Black-Scholes option-pricing model. At September 30, 2003, we estimated the future volatility at 50% based on the implied future volatility for call options in our stock quoted on the Chicago Board Options Exchange in October
2003. A higher volatility would result in greater compensation costs, and a lower volatility would result in lower compensation costs for these stock options.



In addition, the closing market price per share of our stock at the end of each reporting period has a significant effect on the value of the stock
options calculated using the Black-Scholes option-pricing model. A higher market price per share of our stock would result in greater compensation costs, and a lower market price per share of our stock would result in lower compensation costs for
these stock options. At September 30, 2003, there were options to purchase approximately 20,000 shares of common stock granted to non-employees outstanding that were not fully vested that could result in additional changes in compensation costs
under EITF 96-18.



Capitalization of Patent Costs



The costs of patents are capitalized and are amortized
using the straight-line method over the estimated remaining lives of the patents, either 17 years from the date the patent is granted or 20 years from the initial filing of the patent, depending on the patent. These costs are primarily legal fees
and filing fees related to the prosecution of patent filings. We perform a continuous evaluation of the carrying value and remaining amortization periods of these costs. The primary estimate we make is the expected cash flows to be derived from the
patents. In the event future expected cash flows derived from any patents are less than their carrying value, the related costs would be expensed at that time.



Call Transaction Accounting



In July 2000, September 2001 and April 2002, we entered into derivative transactions with a financial institution that could have been settled by selling
shares of our stock to the financial institution at prices significantly higher than the market price per share of our stock at the inception of the transaction. We received proceeds from the sale of these call options that were accounted for as an
increase to additional paid-in capital in accordance with EITF Issue No. 00-19. An extensive list of requirements, including the ability to settle the transaction by issuing stock, is required by EITF Issue No. 00-19 in order to allow accounting for
proceeds received as an increase to additional paid-in capital. The contracts for our derivative transactions met the detailed requirements in EITF Issue No. 00-19. Proceeds of $2.8 million, $344,000 and $388,000 were received and credited to
additional paid-in-capital in the years ended December 31, 2000, 2001 and 2002, respectively. In the event these contracts did not meet the requirements in EITF Issue No. 00-19, these transactions would be accounted for in accordance with SFAS No.
133, Accounting for Derivative Instruments and Hedging Activities. SFAS No. 133 requires derivatives to be recorded on the balance sheet at fair value and would require the carrying value of these call options to be adjusted at the end
of each reporting period until their expiration or exercise. All outstanding derivative transactions have expired unexercised.



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OVERVIEW



We began our operations in January 1993 and, prior to April 1, 2003, we were a development stage company to recognize the fact that we were devoting
substantially all of our efforts to establishing a new business. Principal operations commenced with the commercial launch of Fuzeon on March 27, 2003, and significant revenue was generated from the sale of Fuzeon during the three months ended June
30, 2003. As a result, beginning on April 1, 2003, the Company no longer prepares its financial statements in accordance with SFAS No. 7. Accordingly, we have a limited operating history. Since our inception, substantially all of our resources have
been dedicated to:



| |  | the development, patenting, preclinical testing and clinical trials of our drug candidates, Fuzeon and T-1249,
| | - | --------------------------------------------------------------------------------------------------------------



| |  | the development of a manufacturing process for Fuzeon and T-1249,
| | - | -----------------------------------------------------------------



| |  | production of drug material for future clinical trials of Fuzeon and T-1249,
| | - | ----------------------------------------------------------------------------



| |  | preparation of materials for regulatory filings for Fuzeon,
| | - | -----------------------------------------------------------



| |  | pre-marketing, marketing and sales activities for the launch of Fuzeon, and
| | - | ---------------------------------------------------------------------------



| |  | research and development and preclinical testing of other potential product candidates.
| | - | ---------------------------------------------------------------------------------------



We have lost money since inception and, as of September 30, 2003, had an accumulated deficit of approximately $315.2
million. Prior to March 27, 2003, we had only received revenue from federal small business innovative research grants, otherwise known as SBIR grants, an investigative contract, and an initial collaboration payment and milestone payments from Roche.
On March 27, 2003, we began the commercial sale of Fuzeon, our first commercial product and generated revenue during the nine months ended September 30, 2003.



Under our collaboration agreement with Roche, we will share profits equally from the sale of Fuzeon in the United States and Canada and we will receive
a royalty on the net sales of Fuzeon outside of these two countries. Sales and marketing expenses in the United States and Canada exceeded the gross margin from the sale of Fuzeon in these countries during the three and nine months ended September
30, 2003, and we expect this to be the case for the year ending December 31, 2003, resulting in negative cash flow from the sale of Fuzeon in these countries in 2003. During 2003, we expect our share of this negative cash flow to exceed any
royalties from the sale of Fuzeon outside these countries. As a result, we expect to have negative cash flow from the sale of Fuzeon worldwide during 2003.



Development of current and future drug candidates will require significant additional, time-consuming and costly research and development, preclinical
testing and extensive clinical trials prior to submission of any regulatory application for commercial use. We expect to incur losses for the foreseeable future. These losses may increase as our research and development, preclinical testing, drug
production, clinical trial and marketing efforts expand. These increases may be offset by our share of the gross margin from the sale of Fuzeon in the United States and Canada, and royalties on the sale of Fuzeon outside these countries. The amount
and timing of our operating expenses will depend on many factors, including:



| |  | the status of our research and development activities,
| | - | ------------------------------------------------------



| |  | the timing of expenditures for sales and marketing activities undertaken for the commercialization of Fuzeon,
| | - | -------------------------------------------------------------------------------------------------------------



| |  | product candidate discovery and development efforts, including preclinical testing and clinical trials,
| | - | -------------------------------------------------------------------------------------------------------



| |  | the timing of regulatory actions, including the potential full approval of Fuzeon by the FDA,
| | - | ---------------------------------------------------------------------------------------------



| |  | the costs involved in preparing, filing, prosecuting, maintaining, protecting and enforcing patent claims and other proprietary rights,
| | - | ---------------------------------------------------------------------------------------------------------------------------------------



| |  | our ability to work with Roche to manufacture, develop, sell, market and distribute Fuzeon and T-1249,
| | - | ------------------------------------------------------------------------------------------------------



| |  | technological and other changes in the competitive landscape,
| | - | -------------------------------------------------------------



| |  | changes in our existing or future research and development relationships and strategic alliances,
| | - | -------------------------------------------------------------------------------------------------



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| |  | development of any future research and development relationships or strategic alliances,
| | - | ----------------------------------------------------------------------------------------



| |  | evaluation of the commercial viability of potential product candidates, and
| | - | ---------------------------------------------------------------------------



| |  | other factors, many of which are outside of our control.
| | - | --------------------------------------------------------



As a result, we believe that period-to-period comparisons of our financial results are not necessarily meaningful. The past results of operations and
results of previous clinical trials should not be relied on as an indication of future performance. If we fail to meet the clinical and financial expectations of securities analysts and investors, it could have a material adverse effect on the
market price of our common stock. Our ability to achieve profitability will depend, in part, on our own or Roches ability to successfully develop, obtain, and maintain regulatory approval for Fuzeon, T-1249 or other drug candidates, and our
ability to develop the capacity, either internally or through relationships with third parties, to manufacture, sell, market and distribute approved products, if any. We may never achieve profitable operations.



Clinical Development



The following discussion highlights certain aspects of our on-going and
planned clinical development programs, including data presented during the nine months ended September 30, 2003. Please refer to our Annual Report on Form 10-K for the year ended December 31, 2002 filed with the SEC on March 27, 2003 for a summary
of previous clinical data presented on Fuzeon. The results of our previous clinical trials are not necessarily indicative of the results of future clinical trials.



Fuzeon, T-20 or enfuvirtide



Fuzeon is our first-generation HIV fusion inhibitor, a new class of anti-HIV drugs. The FDA has approved the use of Fuzeon in combination with other
anti-HIV drugs for the treatment of HIV-1 infection in treatment-experienced patients with evidence of HIV-1 replication despite ongoing antiretroviral therapy. Anti-HIV drugs are referred to as antiretroviral agents. The standard approach to
treating HIV infection has been to lower viral loads by using a combination of drugs other than fusion inhibitors that inhibit one of two of the viral enzymes that are necessary for the virus to replicate: reverse transcriptase and protease. There
are currently three classes of drugs that inhibit these two enzymes: nucleoside reverse transcriptase inhibitors, or NRTIs, non-nucleoside reverse transcriptase inhibitors, or NNRTIs, and protease inhibitors, or PIs. We refer to NRTIs and NNRTIs
collectively as RTIs. There are eleven FDA-approved RTIs and eight FDA-approved PIs. On March 13, 2003, the FDA granted accelerated approval for the commercial sale of Fuzeon, and commercial sales of Fuzeon began on March 27, 2003. Roche received
accelerated FDA approval of Fuzeon based on 24-week clinical data from two Phase III pivotal trials for Fuzeon. We refer to these clinical trials as TORO-1, which was conducted in North America and Brazil, and TORO-2, which was conducted in Western
Europe and Australia. In these clinical trials, all patients received an individually optimized background regimen of three to five anti-HIV drugs other than Fuzeon. In the control group, patients received only the optimized background regimen. In
the Fuzeon treatment group, patients received the optimized background regimen in combination with twice daily subcutaneous injections, each delivering 90 mg of Fuzeon. The background regimen was optimized based on the patients treatment
history and the genotype and phenotype of the patients virus. A genotypic resistance analysis involves examination of the genetic sequence of the strains of virus present in the sample. A phenotypic resistance analysis involves an assessment
of the ability of a drug to block infection caused by strains of a virus grown in culture. In both TORO-1 and TORO-2, the primary endpoint for the clinical trials, which is the incremental reduction of viral load achieved in the Fuzeon group versus
the control group, was met with statistical significance. Viral load refers to the amount of HIV virus particles, as measured by the presence of HIV ribonucleic acid, or RNA, found in the blood of an HIV-infected person at a given time. We measure
viral load in terms of copies of HIV RNA per milliliter of blood. Additionally, the interim analysis of TORO-1 and TORO-2 showed that important secondary endpoints were also met with statistical significance. Roche intends to seek full approval in
the United States based on a full analysis of 48-week clinical data from TORO-1 and TORO-2 later this year. There are no results from studies of Fuzeon in patients who have not previously received anti-HIV drugs. There are no results from controlled
trials evaluating the effect of Fuzeon on the clinical progression of HIV.



Roche also filed an application for European marketing approval on September 19, 2002. Roche received approval from the European Medicines Evaluation Agency for use in the European Union on May 27, 2003. Roche will
manufacture the bulk drug substance of Fuzeon. Currently, we anticipate Roche will be able to manufacture sufficient drug supply for up to 18,000 patients worldwide to be receiving Fuzeon by the end of 2003, including up to 12,000 in the United
States, after taking into account the establishment of a six-month safety stock for all patients receiving Fuzeon. Roche is working continually to maximize the manufacturing capabilities of its facilities. Roche recently announced plans
to expand the capacity of its Boulder, Colorado manufacturing facility from its current capacity of 3.2 to 3. 8 metric tons to approximately 6 metric tons.



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Ongoing Fuzeon Clinical Trials



Topline 48-week Phase III Data



In April 2003, we presented combined final topline 48-week efficacy and preliminary safety data from TORO-1 and TORO-2.
These results showed that responses seen at 24 weeks were maintained at 48 weeks in most patients receiving FUZEON in combination with other anti-HIV drugs.



At baseline, patients in the pivotal Phase III studies, TORO-1 and TORO-2, had a median viral load level of more than 5.0 log10copies per milliliter and extensive prior exposure to multiple anti-HIV drugs. At 48 weeks, a combined analysis of patients in
the Fuzeon group achieved a mean reduction in viral load of 1.48 log10copies per milliliter compared to a mean
reduction of 0.63 log10copies per milliliter for those in the control group, a difference of 0.85 log10copies per milliliter. The increase from baseline in CD4 cells was 91 cells per cubic millimeter for patients in the Fuzeon
group compared to 45 cells per cubic millimeter in patients in the control group. CD4 cells are a critical component of the human immune system and are often killed by HIV. An increase in CD4 cell count is indicative of immune system restoration and
is important in reducing the likelihood of opportunistic infection. We measure CD4 cell counts in numbers of CD4 cells per cubic millimeter of blood. The percentage of patients achieving a reduction in viral load to below 400 copies per milliliter
was 30.4% for the Fuzeon group compared to 12.0% for the control group. All data described were statistically significant. Stated otherwise, the statistical measures, p-values, for all the data shown were less than 0.0001. Reduction of viral load
below this level is believed to correlate with long-term durability of response to anti-HIV drug therapy. Overall study discontinuation rates were similar on the two groups, 26.5% for the Fuzeon group compared to 28.7% for the control group. Safety
analyses for 48 weeks are ongoing. Local injection site reactions were the most frequently reported adverse event associated with the use of Fuzeon. 4.4% of patients treated with Fuzeon discontinued treatment due to injection site reactions.



More Detailed 24-week Combined TORO-1 and TORO-2 Data



In July 2003, we presented additional analysis of the
combined 24-week data from TORO-1 and TORO-2. A summary of this data follows.



The data derived from a detailed sub-analysis of the combined TORO-1 and TORO-2 studies show that in patients with less advanced disease, defined as a CD4 cell count of greater than 100 cells per cubic millimeter, and
less treatment experience, defined as experience with six to 10 prior anti-HIV drugs, 68% of patients in the Fuzeon group achieved levels of viral load of less than 400 copies per milliliter at 24 weeks, compared to 39% of patients in the control
group. In patients with the most advanced disease, defined as a CD4 cell count less than 100 cells per cubic millimeter and treatment experience, defined as experience with more than 10 prior anti-HIV drugs, 23% in the Fuzeon group were still able
to achieve viral loads of less than 400 copies per milliliter at 24 weeks, compared to 5% for patients in the control group. These results were statistically significant.



The superiority of the Fuzeon group versus the control group at 24 weeks was observed across all patient subgroups,
categorized by the number of active drugs in the background regimen. Further analysis also demonstrated that in the Fuzeon group, 35% of patients receiving one active drug in their background regimen achieved a reduction of viral load to below 400
copies per milliliter, a proportion similar to or greater than that of patients in the control group receiving three, four or five active drugs. Those percentages were 38%, 26% and 20%, respectively. A separate analysis shows that almost all
patients who achieved viral load of less than 400 copies per milliliter at 24 weeks maintained this response at 48 weeks, confirming the durability of Fuzeon-based regimens in treatment-experienced patients.



More Detailed 48-week Combined TORO-1 and TORO-2 Data



At 48 weeks, patients in the Fuzeon group were more than twice as likely to
achieve viral loads less than 400 copies per milliliter compared to patients in the control group, 30% of patients in the Fuzeon group compared to 12% in the control group. This parallels the 24-week results, where 33% of patients in the Fuzeon
group and 15% of patients in the control group, respectively, had viral loads less than 400 copies per milliliter. These results were statistically significant.



The Fuzeon group also received an increase in the number of CD4 cells of 91 cells per cubic millimeter at 48 weeks compared to an increase of 45 cells
per cubic millimeter in the control group. This was an even greater improvement in immune status compared to 24 weeks, when patients in the group received an increase of 71 cells per cubic millimeter, compared to 35 cells per cubic millimeter in the
control group. The differences between the Fuzeon group and the control group were statistically significant.



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In addition, the average time to virological failure was three times longer for patients in the Fuzeon
group than for those in the control group, 32 weeks for the Fuzeon group compared to 11 weeks for the control group. Virological failure refers to the inability of an anti-HIV drug regimen to reduce or suppress HIV in accordance with broadly
accepted, pre-defined measures. These results were statistically significant.



The superiority of the Fuzeon group compared to the control group at 48 weeks was observed across all patient subgroups, categorized by the number of active drugs in the background regimen. Among patients whose virus
was sensitive to one drug in the background regimen, 29% of patients in the Fuzeon group achieved viral loads less than 400 copies per milliliter, compared to 7% in the control group. 39% of patients who had at least two active agents in their
background regimen achieved viral loads less than 400 copies per milliliter in the Fuzeon group at 48 weeks compared to 15% in the control group. All of these results were statistically significant.



In September 2003, we presented additional analysis of the combined 48-week
data from TORO-1 and TORO-2. Eighty percent of patients in the Fuzeon group that achieved a viral load of less that 400 copies at 24 weeks, maintained viral load levels of less than 400 copies at 48 weeks, compared to 70% achieving this response in
the control group. Thirty-seven percent of patients in the Fuzeon group maintained a mean reduction in viral load of at least 1.0 log10copies per milliliter, or 90%, at 48 weeks, compared to 17% achieving this reduction in the control group.



Future Fuzeon Clinical Trials



In the future, we expect to initiate additional Fuzeon clinical trials in the U.S. and internationally.



Safety Data at 24 Weeks



Fuzeon is self-administered as a twice-daily subcutaneous injection. Local
injection site reactions were the most frequent adverse events associated with the use of Fuzeon. In Phase III clinical studies, 98% of patients at 24 weeks had at least one local injection site reaction. Manifestations of injection site reactions
may include pain and discomfort, hardness, redness, nodules and cysts, itching, and bruising.



There was less than 5% difference in the most common adverse events seen between the Fuzeon group and the control group. The events most frequently reported in the Fuzeon group were diarrhea (26.8%), nausea (20.1%),
and fatigue (16.1%). All these events were seen at a lower incidence than in the control group: diarrhea (33.5%), nausea (23.7%), and fatigue (17.4%). The most common adverse events seen more frequently in the Fuzeon group than in the control group
include pain or numbness in the peripheral nervous system (8.9%), insomnia (11.3%), depression (8.6%), decreased appetite (6.3%), weakness (5.7%), muscle aches and pains (5.0%), constipation (3.9%) and pancreatitis (2.4%). The majority of adverse
events were of mild or moderate intensity. On rare occasions, hypersensitivity reactions, or allergic reactions, have been associated with Fuzeon therapy (less than or equal to 1%) and some of these events have recurred on rechallenge. Symptoms of
an allergic reaction may include rash, fever, nausea and vomiting, chills, rigors, low blood pressure and elevated liver enzymes. In addition, an increased rate of bacterial pneumonia was observed in the Fuzeon group in the Phase III clinical trials
compared to the control group. It is unclear if the increased incidence of pneumonia is related to Fuzeon use. Fuzeon does not cure HIV infection or AIDS. Patients taking Fuzeon may acquire opportunistic infections or other conditions that are
associated with HIV infection. The list of side effects is not complete at this time because Fuzeon is still being studied.



Safety Data at 48 Weeks



A 48-week topline safety analysis was also recently completed. 98% of patients in the Fuzeon group experienced at least one injection site reaction. Aside
from injection site reactions, the incidence of the three most common adverse events was less frequent in the Fuzeon group compared to control group: 37 patients experienced diarrhea per 100 years of patient exposure in the Fuzeon group compared to
73 per 100 years of patient exposure in the control group, 26 patients experienced nausea per 100 years of patient exposure in the Fuzeon group compared to 51 per 100 years of patient exposure in the control group, and 25 patients experienced
fatigue per 100 years of patient exposure in the Fuzeon group compared to 38 per 100 years of patient exposure in the control group. All of these measures were adjusted for length of patient exposure. Further safety analyses at 48 weeks are ongoing.



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Manufacturing



The synthetic manufacture of peptides historically has been complex and expensive. This constraint has not limited the
commercialization of most existing peptide therapeutics, which are administered in relatively small doses. Dosing levels of Fuzeon are relatively high compared to therapeutic peptides currently prescribed for other indications. We have developed a
novel peptide manufacturing process, which we believe will allow us to produce Fuzeon on a large-scale and cost-efficient basis. Roche will manufacture bulk quantities of Fuzeon drug substance in its Boulder, Colorado facility. We have selected one
of Roches manufacturing facilities and another third party to produce the finished drug product from such bulk drug substance.



The scale-up of production of Fuzeon bulk drug substance at Roches Boulder, Colorado facility was achieved during the second half of 2002. Not
surprisingly, production yields were lower and cycle times were longer than projected in the initial batches. Simple process modifications were made during the scale-up process that brought the yields in subsequent batches to the projected target
levels derived from pilot plant production. Once the target yields were achieved, we and Roche identified the final purification stage as the rate limiting step that resulted in longer than projected cycle times. Based on analysis of this stage, we
and Roche believed that installation of a duplicate chromatography column would reduce the cycle time of the purification stage and allow us to meet or exceed our initial targeted cycle times for the bulk drug substance production process. This
chromatography column has been installed, has been qualified and is in production. We and Roche continue to work to improve the yields and cycle times of the current process. Roche recently announced plans to expand the capacity of its Boulder,
Colorado manufacturing facility from its current capacity of 3.2 to 3.8 metric tons to approximately 6 metric tons.



Roches drug product manufacturing facility and the third-party drug product manufacturing facility have both successfully completed validation
batches of Fuzeon drug product and are currently manufacturing drug product on commercial scale.



Our current expectations regarding available worldwide supply of Fuzeon, based on Roches Boulder, Colorado facilitys current capacity and
current yield and cycle time targets, are as follows:



2003.
Short-term manufacturing estimates for Fuzeon are based on the current estimated ability to produce approximately 2.2 metric tons of Fuzeon in 2003equivalent to up to 20,000 treatment packs (one treatment pack equals one month supply for one
patient) per month by year end. This translates into supply for up to 18,000 patients worldwide by the end of 2003. Based on a planned allocation of approximately 65% of worldwide supply to the United States we expect there to be supply for up to
12,000 patients in the United States by the end of 2003. This number of patients is lower than would be calculated based upon the manufacturing output for the year due to the fact that approximately half a year safety supply is allocated
to every patient to ensure continuity of drug supply. We believe that a half-year safety supply is prudent given our early stage of commercial production and the severity of the illness being treated; however, we plan to evaluate the safety supply
requirements as we move forward.



2004. Annual production of
Fuzeon is planned to increase to around 3.7 metric tonsequivalent to up to 39,000 treatment packs per month during mid-2004. After setting aside patient safety supplies, this will equate to up to a maximum of 32,000 patients receiving Fuzeon
by year-end 2004. These figures are based upon the assumption that the individual patient safety supply of approximately half a year is maintained and projected cycle times and yields remain on track. As we continue to gain confidence in the process
and fill the distribution pipeline, we will evaluate the amount of safety stock required to maintain a continuity of supply.



2005. It is expected that safety supplies will already be established and the existing manufacturing capacity can therefore supply up to 39,000 patients,
based upon the improvements described.



T-1249



T-1249 is our second-generation fusion inhibitor for HIV.
The history of HIV treatment has demonstrated that the existence of multiple drugs within the RTI and PI classes have allowed for a variety of drug combinations and improved patient treatment. We believe that multiple HIV fusion inhibitors may
further enhance HIV therapy by providing an even broader range of treatment options. To date, T-1249 has demonstrated potent HIV suppression in vitro, and is highly active against a wide range of HIV strains in vitro, including strains resistant to
Fuzeon.



Phase I/II  T1249-102



In September 2003, we announced final data from study T1249-102. This study
evaluated the antiviral activity and safety of T-1249 over a 10-day period in patients who had failed an individualized anti-HIV drug regimen that had previously included Fuzeon. Eligible patients were participating in Phase II or Phase III studies
of Fuzeon and were experiencing evidence of viral replication while on this drug regimen. Patients in this study discontinued Fuzeon and added T-1249 to the unchanged background regimen of anti-HIV drugs. A total of 53 patients received T-1249 in
this trial. The median viral load decline from



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baseline viral load after ten days of treatment was 1.26 log10copies per milliliter. There were no serious adverse events judged possibly to be related to T-1249 in the trial. These data demonstrate that T-1249 retains short term antiviral activity in most
patients who are failing an anti-HIV drug regimen containing Fuzeon.



Future T-1249 Clinical Trials



We are
currently planning our Phase II clinical program which will focus on the development of T-1249 for patients who have experienced virological failure on Fuzeon. Based on the results of T1249-102, this strategy may provide patients with the ability to
take T-1249 in sequence after experiencing virological failure on Fuzeon, therefore allowing patients to receive clinical benefit for a longer period on fusion inhibitor therapy. These trials will be in North America and Europe and will begin once
the planning phase is completed, health authority input is received and the manufacturing process is developed sufficiently to support patients chronically receiving T-1249. We currently expect to initiate these clinical trials in 2004.



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##### Table of Contents

Results of Operations



COMPARISON OF THREE MONTHS ENDED SEPTEMBER 30, 2002 AND 2003



MILESTONE REVENUE. Total milestone revenue of $326,000 and $989,000 for the three months ended September 30, 2002 and 2003, respectively, represents the amortization of
milestone payments from Roche for milestones achieved under our collaboration agreement, recorded at the time the specific milestone was achieved. We recorded and are amortizing a $10 million initial collaboration payment from Roche, net of the $5.4
million assigned to the warrant granted to Roche concurrent with the initiation of our collaboration, a $2.0 million milestone recorded in 2000, and milestones of $8.0 million, and $5.0 million recorded in 2003, over the expected research and
development period of our collaboration with Roche in accordance with SAB No. 101. We recorded a $2.5 million milestone related to manufacturing in 2003 that we are amortizing over the expected commercial life of Fuzeon. Under SAB No. 101, $4.2
million was reported as the cumulative effect of a change in accounting principle at January 1, 2000 to be amortized into revenue over future years. During the fourth quarter of 2002, we increased our estimate of the length of this development
period based on the expected development schedule of T-1249, the final compound covered by our collaboration agreement with Roche. This estimate is subject to significant variability since T-1249 has only completed two Phase I/II trials. This change
in estimated term resulted in a prospective adjustment to milestone revenue recognized beginning in the fourth quarter of 2002 in accordance with APB 20. The change in our estimate of the development term resulted in less revenue recognized for
milestones received prior to 2003 in the three months ended September 30, 2003 than in the three months ended September 30, 2002.



ROYALTY REVENUE Total royalty revenue was $0 and $234,000 for the three months ended September 30, 2002 and 2003, respectively. Royalty revenue represents the royalty
payment earned from Roche based on total net sales outside the United States and Canada. Sales of Fuzeon outside the United States and Canada began in June 2003. Total net sales outside the United States and Canada for the quarter ended September
30, 2003 were $2.4 million.



COLLABORATION LOSS. Under our collaboration
agreement with Roche, we share profits equally from the sale of Fuzeon in the United States and Canada. Collaboration loss is calculated as follows. Total gross sales of Fuzeon in the United States and Canada are reduced by any discounts or rebates
resulting in total net sales. Net sales are reduced by costs of goods sold resulting in gross margin. Gross margin is reduced by selling and marketing expenses related to the sale of Fuzeon, resulting in operating income or loss. Our 50% share of
the operating income or loss is reported as collaboration income or loss. Product sales of Fuzeon began in the United States on March 27, 2003. Total net sales of Fuzeon were $10.7 million during the three months ended September 30, 2003. During the
quarter ended September 30, 2003, sales and marketing expenses exceeded the gross margin from the sale of Fuzeon resulting in our 50% share of operating loss from the sale of Fuzeon in the United States of $5.2 million. We expect sales and marketing
expenses to exceed gross margin from the sale of Fuzeon for 2003 resulting in a net collaboration loss from the sale of Fuzeon for the year. Roche has entered into an exclusive distribution arrangement with Chronimed to distribute Fuzeon in the
United States during the initial commercial launch in 2003. Revenue from product sales is recognized when title and risk of loss has passed to Chronimed, which is when Chronimed allocates drug for shipment to a patient.



At September 30, 2003, we believe there were approximately 4,350 patients receiving Fuzeon
therapy in the United States. This number includes patients who are receiving reimbursement through the Fuzeon Patient Assistance Program, as well as patients receiving reimbursement from traditional HIV drug reimbursement channels. We believe the
number of prescriptions received for new patients was relatively constant at around 500 per month during the three months ended September 30, 2003. The number of prescriptions received for new patients may not remain constant and may increase or
decrease in the future. These new patient prescriptions include prescriptions for patients who eventually receive Fuzeon through reimbursement by traditional HIV drug reimbursement channels, patients who eventually receive Fuzeon through
reimbursement by the Fuzeon Patient Assistance Program, and patients who never receive Fuzeon.



MARKETING EXPENSE. Marketing expense during 2002 included expenses incurred for pre-launch activities related to Fuzeon and consisted primarily of expenses for market research and presentation of data on our Fuzeon
Phase III trials at various scientific meetings. During the three months ended September 30, 2003, sales and marketing expenses related to Fuzeon are included in collaboration loss because we launched Fuzeon on March 27, 2003.



RESEARCH AND DEVELOPMENT EXPENSES. Total research and development expenses were $12.3 million
and $10.7 million for the three months ended September 30, 2002 and 2003, respectively. Total research and development expenses include gross research and development expenses less Roches share of such costs for Fuzeon and T-1249. Under our
collaboration agreement, Roche and we shared equally the development costs incurred during the period from July 1, 1999 until September 30, 2003 for Fuzeon and T-1249.



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Non-cash compensation expense was $98,000 in expense and $125,000 in expense reversal for the three
months ended September 30, 2002 and 2003, respectively. The expense reversal resulted because the cumulative expense calculated under EITF 96-18 for stock options previously granted to non-employees was greater at June 30, 2003 than at September 30,
2003, primarily because of the decrease in the market price of our stock from June 30, 2003 to September 30, 2003. The closing market price per share of our stock was $45.62 and $25.07 on June 30, 2003 and September 30, 2003, respectively. The
expense for the three months ended September 30, 2002 resulted because the cumulative expense calculated under EITF 96-18 for stock options previously granted to non-employees was greater at September 30, 2002 than at June 30, 2002, primarily
because of the increase in the market price of our stock from June 30, 2002 to September 30, 2002. The closing market price per share of our stock was $44.39 and $44.65 on June 30, 2002 and September 30, 2002, respectively. EITF 96-18 requires that
compensation costs related to stock options granted to non-employees be measured at the end of each reporting period to account for changes in the fair value of our common stock until the options are vested.



Total other research and development expenses, which are total research and
development expenses net of non-cash compensation charges, decreased from $12.2 million during the three months ended September 30, 2002 to $10.9 million during the three months ended September 30, 2003 primarily because during 2003 we incurred less
expense than in 2002 for:



| |  | our two Phase III clinical trials for Fuzeon which were initiated in late 2000, and the data accumulation and compilation process for clinical data from these trials,
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | production of drug material for Fuzeon clinical trials, and
| | - | -----------------------------------------------------------



| |  | our Phase II clinical trials for Fuzeon which were substantially completed in 2002.
| | - | -----------------------------------------------------------------------------------



This decrease in expenses was partially offset by increases in expenses during the three months ended September 30, 2003 for the production
of drug material for future T-1249 clinical trials.



Total research personnel
were 87 and 92 at September 30, 2002 and 2003, respectively. We expect research and development expenses, net of reimbursements for Fuzeon and T-1249 development costs from Roche, may increase in the future due to:



| |  | continuation of Phase III clinical trials for Fuzeon,
| | - | -----------------------------------------------------



| |  | preparation of additional materials and submissions for the Fuzeon New Drug Application, or NDA, to the FDA in support of full approval for Fuzeon,
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------



| |  | expanded clinical trials for Fuzeon, T-1249 and other product candidates,
| | - | -------------------------------------------------------------------------



| |  | the manufacture of drug material for these trials,
| | - | --------------------------------------------------



| |  | increased preclinical research and testing of potential product candidates, and
| | - | -------------------------------------------------------------------------------



| |  | increased number of personnel to support these activities.
| | - | ----------------------------------------------------------



GENERAL AND ADMINISTRATIVE EXPENSES. Total general and administrative expenses were $2.9 million and $2.2 million for the three months ended September 30, 2002 and 2003,
respectively.



Non-cash compensation expense decreased from
$414,000 for the three months ended September 30, 2002 to $122,000 for the three months ended September 30, 2003 primarily due to the fact that several option grants to employees accounted for under APB Opinion No. 25, Accounting for Stock
Issued to Employees, became fully vested during 2003, resulting in less deferred compensation expense amortization for the three months ended September 30, 2003 compared to the three months ended September 30, 2002.



Other general and administrative expense decreased from $2.5 million for the
three months ended September 30, 2002 to $2.1 million for the three months ended September 30, 2003 because during 2003 we did not incur professional fees related to a legal dispute with a former consultant that was settled in 2002. This decrease
was partially offset by increased expenses in 2003 because we:



| |  | incurred increased premiums for directors and officers insurance, and
| | - | ----------------------------------------------------------------------



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| |  | incurred additional professional fees due to new requirements recently placed on public companies by The Sarbanes-Oxley Act of 2002.
| | - | ------------------------------------------------------------------------------------------------------------------------------------



We expect other general and administrative expenses to increase in the future to support
expansion of product development activities and to meet new requirements recently placed on public companies by The Sarbanes-Oxley Act of 2002, related regulations issued by the SEC and new Nasdaq listing standards.



OTHER INCOME (EXPENSE). Other income (expense) consists of interest income and expense. Total
other income was $422,000 and $314,000 for the three months ended September 30, 2002 and 2003, respectively. The decrease was primarily due to lower interest income because of lower interest rates on our investment portfolio during the three months
ended September 30, 2003 compared to the three months ended September 30, 2002, net of increased average investment balances during the three months ended September 30, 2003 compared to the three months ended September 30, 2002. We expect yields on
our investment portfolio to remain at these levels for the foreseeable future based on the current short-term interest rate environment.



COMPARISON OF NINE MONTHS ENDED SEPTEMBER 30, 2002 AND 2003



MILESTONE REVENUE. Total milestone revenue of $978,000 and $2.0 million for the nine months ended September 30, 2002 and 2003, respectively, represents the amortization
of milestone payments from Roche for milestones achieved under our collaboration agreement, recorded at the time the specific milestone was achieved. We recorded and are amortizing a $10 million initial collaboration payment from Roche, net of the
$5.4 million assigned to the warrant granted to Roche concurrent with the initiation of our collaboration, a $2.0 million milestone recorded in 2000, and milestones of $8.0 million, and $5.0 million recorded in 2003, over the expected research and
development period of our collaboration with Roche in accordance with SAB No. 101. We recorded a $2.5 million milestone related to manufacturing in 2003 that we are amortizing over the expected commercial life of Fuzeon. Under SAB No. 101, $4.2
million was reported as the cumulative effect of a change in accounting principle at January 1, 2000 to be amortized into revenue over future years. During the fourth quarter of 2002, we increased our estimate of the length of this development
period based on the expected development schedule of T-1249, the final compound covered by our collaboration agreement with Roche. This estimate is subject to significant variability since T-1249 has only completed two Phase I/II trials. This change
in estimated term resulted in a prospective adjustment to milestone revenue recognized beginning in the fourth quarter of 2002 in accordance with APB 20. The change in our estimate of the development term resulted in less revenue recognized for
milestones received prior to 2003 in the nine months ended September 30, 2003 than in the nine months ended September 30, 2002.



ROYALTY REVENUE Total royalty revenue was $0 and $321,000 for the nine months ended September 30, 2002 and 2003, respectively. Royalty revenue represents the royalty
payment earned from Roche based on total net sales outside the United States and Canada. Sales of Fuzeon outside the United States and Canada began in June 2003. Total net sales outside the United States and Canada for the nine months ending
September 30, 2003 were $3.2 million.



COLLABORATION LOSS. Under our
collaboration agreement with Roche, we share profits equally from the sale of Fuzeon in the United States and Canada. Collaboration loss is calculated as follows. Total gross sales of Fuzeon in the United States and Canada are reduced by any
discounts or rebates resulting in total net sales. Net sales are reduced by costs of goods sold resulting in gross margin. Gross margin is reduced by selling and marketing expenses related to the sale of Fuzeon, resulting in operating income or
loss. Our 50% share of the operating income or loss is reported as collaboration income or loss. Product sales of Fuzeon began in the United States on March 27, 2003. Total net sales of Fuzeon were $15 million during the nine months ended September
30, 2003. During the nine months ended September 30, 2003, sales and marketing expenses exceeded the gross margin from the sale of Fuzeon resulting in our 50% share of operating loss from the sale of Fuzeon in the United States of $15.4 million. We
expect sales and marketing expenses to exceed gross margin from the sale of Fuzeon for 2003 resulting in a net collaboration loss from the sale of Fuzeon for the year. Roche has entered into an exclusive distribution arrangement with Chronimed to
distribute Fuzeon in the United States during the initial commercial launch in 2003. Revenue from product sales is recognized when title and risk of loss has passed to Chronimed, which is when Chronimed allocates drug for shipment to a patient.



MARKETING EXPENSE. Marketing expense during 2002 included expenses incurred
for pre-launch activities related to Fuzeon and consisted primarily of expenses for market research and presentation of data on our Fuzeon Phase III trials at various scientific meetings. During 2003, sales and marketing expenses related to Fuzeon
are included in collaboration loss because we launched Fuzeon on March 27, 2003.



RESEARCH AND DEVELOPMENT EXPENSES. Total research and development expenses were $39.1 million and $31.2 million for the nine months ended September 30, 2002 and 2003, respectively. Total research and development expenses include



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gross research and development expenses less Roches share of such costs for Fuzeon and T-1249. Under our collaboration agreement, we shared equally
with Roche the development costs incurred during the period from July 1, 1999 until September 30, 2003 for Fuzeon and T-1249.



Non-cash compensation expenses were $226,000 and $18,000 for the nine months ended September 30, 2002 and 2003, respectively. The decrease in expense
resulted primarily because of the decrease in the market price of our stock from December 31, 2002 to September 30, 2003, offset by the additional vesting of the outstanding options during that period, compared to the slight decrease in the market
price of our stock from December 31, 2001 to September 30, 2002. The closing market price per share of our stock was $43.17 and $25.07 on December 31, 2002 and September 30, 2003, respectively. The closing market price per share of our stock was
$44.97 and $44.65 on December 31, 2001 and September 30, 2002, respectively. During the three months ended June 30, 2002, a significant number of the options previously granted to non-employees became vested. EITF 96-18 requires that compensation
costs related to stock options granted to non-employees be measured at the end of each reporting period to account for changes in the fair value of our common stock until the options are vested.



Total other research and development expenses, which are total research and
development expenses net of non-cash compensation charges, decreased from $38.9 million during the nine months ended September 30, 2002 to $31.2 million during the nine months ended September 30, 2003 primarily because during 2003 we incurred less
expense than in 2002 for:



| |  | our two Phase III clinical trials for Fuzeon which were initiated in late 2000, and the data accumulation and compilation process for clinical data from these trials,
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | preparation of materials for the submission of an NDA for Fuzeon to the FDA, which was completed on September 16, 2002,
| | - | -----------------------------------------------------------------------------------------------------------------------



| |  | the purchase of drug material for future clinical trials of Fuzeon, and
| | - | -----------------------------------------------------------------------



| |  | our Phase II clinical trials for Fuzeon which were substantially completed in 2002.
| | - | -----------------------------------------------------------------------------------



This decrease in expenses was partially offset by increases in expenses during the nine months ended September 30, 2003 because we:



| |  | increased the number of our personnel to support our clinical trial and research activities,
| | - | --------------------------------------------------------------------------------------------



| |  | produced additional drug material for future T-1249 clinical trials, and
| | - | ------------------------------------------------------------------------



| |  | incurred costs related to a potential building project.
| | - | -------------------------------------------------------



Total research personnel were 87 and 92 at September 30, 2002 and 2003, respectively. We expect research and development expenses, net of reimbursements for Fuzeon and
T-1249 development costs from Roche, may increase in the future due to:



| |  | continuation of Phase III clinical trials for Fuzeon,
| | - | -----------------------------------------------------



| |  | preparation of additional materials and submissions for the Fuzeon NDA to the FDA in support of full approval for Fuzeon,
| | - | -------------------------------------------------------------------------------------------------------------------------



| |  | expanded clinical trials for Fuzeon, T-1249 and other product candidates,
| | - | -------------------------------------------------------------------------



| |  | the manufacture of drug material for these trials,
| | - | --------------------------------------------------



| |  | increased preclinical research and testing of potential product candidates, and
| | - | -------------------------------------------------------------------------------



| |  | increased number of personnel to support these activities.
| | - | ----------------------------------------------------------



GENERAL AND ADMINISTRATIVE EXPENSES. Total general and administrative expenses were $7.6 million and $7.4 million for the nine months ended September 30, 2002 and 2003,
respectively.



Non-cash compensation expense decreased from
$1.2 million for the nine months ended September 30, 2002 to $767,000 for the nine months ended September 30, 2003 primarily due to the fact that several option grants to employees accounted for under



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APB Opinion No. 25, Accounting for Stock Issued to Employees, became fully vested during 2003, resulting in less deferred compensation expense
amortization for the nine months ended September 30, 2003 compared to the nine months ended September 30, 2002.



Other general and administrative expense increased from $6.4 million for the nine months ended September 30, 2002 to $6.7 million for the nine months
ended September 30, 2003 because during 2003 we:



| |  | incurred increased premiums for directors and officers insurance,
| | - | ------------------------------------------------------------------



| |  | incurred additional professional fees due to new requirements recently placed on public companies by The Sarbanes-Oxley Act of 2002, offset by a decrease in professional fees
related to a legal dispute with a former consultant that was settled in 2002, and
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  | increased administrative personnel from 40 at September 30, 2002 to 42 at September 30, 2003.
| | - | ---------------------------------------------------------------------------------------------



We expect other general and administrative expenses to increase in the future to support expansion of product development activities and to
meet new requirements recently placed on public companies by The Sarbanes-Oxley Act of 2002, related regulations issued by the SEC and new Nasdaq listing standards.



OTHER INCOME (EXPENSE). Other income (expense) consists of interest income and expense. Total other income was $1.4 million and $1.2 million
for the nine months ended September 30, 2002 and 2003, respectively. The decrease was primarily due to lower interest income because of lower interest rates on our investment portfolio during the nine months ended September 30, 2003 compared to the
nine months ended September 30, 2002, net of increased average investment balances during the nine months ended September 30, 2003 compared to the nine months ended September 30, 2002. We expect yields on our investment portfolio to remain at these
levels for the foreseeable future based on the current short-term interest rate environment.



Liquidity and Capital Resources



Since inception, we have financed our operations primarily through private placements and public offerings of common stock, equipment lease financing and payments under our collaboration agreement with Roche. Net cash used by operating
activities was $54.1 million and $38.9 million for the nine months ended September 30, 2002 and 2003, respectively. The cash used by operating activities during the nine months ended September 30, 2003 was used primarily to fund research and
development relating to Fuzeon, T-1249, and other product candidates, and decreased for the nine months ended September 30, 2003 over the same period in 2002 because of the timing of our quarterly payment to Roche, milestone payments received from
Roche and reduced research and development expenses for the development of Fuzeon. Cash provided by investing activities was $17.7 million and $22.4 million for the nine months ended September 30, 2002 and 2003, respectively. The amount provided for
the nine months ended September 30, 2002 and 2003 resulted primarily from the sale of short-term investments to fund our operating activities. Cash provided by financing activities was $41.7 million and $2.0 million for the nine months ended
September 30, 2002 and 2003, respectively. Cash provided by financing activities for the nine months ended September 30, 2002 was primarily the proceeds of our private placement of common stock completed in January 2002. Cash provided by financing
activities for the nine months ended September 30, 2003 resulted primarily from proceeds from the exercise of stock options.



As of September 30, 2003, we had $110.8 million in cash and cash equivalents and short-term-investments, compared to $149.2 million as of December 31,
2002. The decrease is primarily a result of cash used by operating activities for the nine months ended September 30, 2003.



In July 2000, September 2001 and April 2002, we entered into derivative transactions with a financial institution, which are described below under
Off-Balance Sheet Arrangements. Proceeds of $2.8 million, $344,000 and $388,000 were received and credited to additional paid-in-capital in December 31, 2000, 2001 and 2002, respectively, in accordance with EITF 00-19. All outstanding
derivative transactions have expired unexercised. We may enter into similar transactions in the future, subject to market conditions.



We have experienced negative cash flows from operations since our inception and do not anticipate generating sufficient positive cash flows to fund our
operations in the foreseeable future. Although we expect to share the future development costs for Fuzeon and T-1249 in the United States and Canada equally with Roche, we have expended, and expect to continue to expend in the future, substantial
funds to pursue our drug candidate and compound discovery and development efforts, including:



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| |  | expenditures for clinical trials of Fuzeon, T-1249 and other product candidates,
| | - | --------------------------------------------------------------------------------



| |  | preparation of additional materials and submissions for the Fuzeon NDA to the FDA in support of full approval for Fuzeon,
| | - | -------------------------------------------------------------------------------------------------------------------------



| |  | expenditures for sales and marketing activities undertaken for the commercialization of Fuzeon,
| | - | -----------------------------------------------------------------------------------------------



| |  | research and development and preclinical testing of other product candidates,
| | - | -----------------------------------------------------------------------------



| |  | manufacture of drug material, and
| | - | ---------------------------------



| |  | the development of our proprietary technology platform.
| | - | -------------------------------------------------------



Under our collaboration agreement with Roche, we will share profits equally from the sale of Fuzeon in the United States and Canada and we will receive a
royalty on the net sales of Fuzeon outside of these two countries. We expect sales and marketing expenses in the United States and Canada to exceed the gross margin from the sale of Fuzeon in these countries during 2003, resulting in negative cash
flow from the sale of Fuzeon in these countries in 2003. During 2003 we expect our share of this negative cash flow to exceed any royalties from the sale of Fuzeon outside these countries, should Roche receive Fuzeon regulatory approval in other
countries. As a result, we expect to have negative cash flow from the sale of Fuzeon worldwide during 2003.



We have an exclusive, worldwide, royalty-bearing license from the New York Blood Center under certain U.S. and foreign patents and patent applications
relating to certain HIV peptides. Under this license we are required to pay to the New York Blood Center a royalty equal to one-half of one percent of the net sales of Fuzeon up to $100 million, and one-quarter of one percent of net sales in excess
of $100 million. There is no royalty payable with respect to T-1249. Royalties under this license were $91,000 for the nine months ended September 30, 2003.



As of September 30, 2003, we had commitments of approximately $1.6 million to purchase product candidate materials and fund various clinical studies over
the next 15 months contingent on delivery of the materials or performance of the services. Substantially all of these expenditures will be shared equally by Roche under our collaboration agreement. Under this collaboration agreement, we are
obligated to share equally the future development expenses for Fuzeon and T-1249 in the United States and Canada. We also expect to have capital expenditures for furniture and equipment of approximately $500,000 during the remainder of 2003 that
will not be shared with Roche. Our share of these expenditures may be financed with capital or operating leases, debt or working capital.



Barring unforeseen developments, based on our current expectations regarding regulatory approval, manufacturing and commercialization of Fuzeon, we expect
that our existing capital resources, together with the interest earned thereon, will be adequate to fund our current programs for at least the next 12 months. However, any delay or negative action by regulatory agencies regarding approval for the
marketing of Fuzeon, delay in manufacturing, failure of Fuzeon to achieve anticipated market acceptance, or addition of development programs would increase our capital requirements substantially beyond our current expectations. If we require
additional funds and such funds are not available through debt or equity financings, or collaboration arrangements, we will be required to delay, scale-back or eliminate certain preclinical testing, clinical trials and research and development
programs, including our collaborative efforts with Roche. In the event Roche becomes unable or unwilling to share future development expenses for Fuzeon and T-1249, our capital requirements would increase substantially beyond our current
expectations.



Since our initial public offering in 1997, we
have obtained the majority of our funding through public or private offerings of our common stock. We expect to continue to obtain our funding through public or private offerings of our common stock or debt until such time, if ever, as we are able
to generate significant funds from operations.



We may have
difficulty raising additional funds by selling equity. If we fail to meet the clinical and financial expectations of securities analysts and investors, it could have a material adverse effect on the market price of our common stock and restrict or
eliminate our ability to raise additional funds by selling equity. The market price per share of our stock has decreased from $45.62 on June 30, 2003 to $25.07 on September 30, 2003. Any sale of equity at this market price would be substantially
more dilutive to current shareholders than prior to this decrease in the market price of our stock. The public capital markets in which shares of our common stock are traded have been extremely volatile. The current geo-political situations in Iraq,
North Korea and other areas of the world have made it increasingly difficult for companies to raise additional capital by selling equity. The public equity markets for biotechnology companies were extremely volatile in 2002, and remain so in 2003.
Drug candidates for several publicly-held biotechnology companies, including Isis Pharmaceuticals, Inc., SuperGen, Inc., Biomira, Inc., and Regeneron



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Pharmaceuticals, Inc. failed to meet primary clinical endpoints in clinical trials, resulting in significant reduction in the market price of their common
stock. Therefore, even if we do achieve positive clinical or financial results that meet or exceed the expectations of securities analysts and investors, the state of the public equity markets in general and particularly the public equity market for
biotechnology companies may prohibit us from raising funds in the equity markets on acceptable terms or at all. Even if we are able to obtain additional funding through an equity financing, the terms of this financing could be highly dilutive to
current shareholders.



We may also attempt to obtain additional
funding through debt financings and/or arrangements with new or existing collaborative partners. Any debt financings may contain restrictive terms that limit our operating flexibility. Arrangements with partners may require us to relinquish rights
to our technologies or product candidates or to reduce our share of potential profits. This could have a material adverse effect on our business, financial condition or results of operations.



Our future capital requirements and the adequacy of available funds will
depend on many factors, including the availability of funds from Roche under our collaboration agreement; the condition of public capital markets; the results of regulatory actions related to Fuzeon; the level of market acceptance of Fuzeon; the
timing of expenditures for sales and marketing costs for the commercialization of Fuzeon; the progress and scope of our product development programs; the magnitude of these programs; the results of preclinical testing and clinical trials; the need
for additional facilities based on the results of these clinical trials and other product development programs; changes in the focus and direction of our product development programs; the costs involved in preparing, filing, processing, maintaining,
protecting and enforcing patent claims and other intellectual property rights; competitive factors and technological advances; the cost, timing and outcome of regulatory reviews; changes in the requirements of the FDA; administrative and legal
expenses; evaluation of the commercial viability of potential product candidates and compounds; the establishment of capacity, either internally or through relationships with third parties, for manufacturing, sales, marketing and distribution
functions; and other factors, many of which are outside of our control.



The following table summarizes our material contractual commitments at September 30, 2003 for the remainder of 2003 and subsequent years (in thousands):



|Contractual Obligation         |  | 2003 |       | 2004 |   | 2005  |  | Total
|------------------------------ |  | ---- | ----- | ---- | - | ----- |  | -----
|Capital Leases                 |  | $    | 161   |      | $ | 326   |  | $    
|Operating Leases               |  |      | 270   |      |   | 1,105 |  |      
|Other contractual obligations* |  |      | 1,124 |      |   | 448   |  |      
|                               |  |      |       |      |   |       |  |      
|Total                          |  | $    | 1,555 |      | $ | 1,879 |  | $    
|                               |  |      |       |      |   |       |  |      

---

|* | Includes contracts to purchase product candidate materials and fund various clinical studies contingent on delivery of the materials or performance of the services. Substantially
all of these costs will be shared equally with Roche.
|- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Off-Balance Sheet Arrangements



We do not have
any off-balance sheet arrangements other than operating leases for our properties and the derivative transactions described below. These transactions represent call options sold on our stock to a third party financial institution and were entered
into in order to generate cash from the option premiums and provide us with the opportunity to raise capital at prices significantly in excess of the market price at the time of the transaction. These contracts were expected to be settled by issuing
shares of our stock in the event the options are exercised. We have no subsidiaries or other unconsolidated limited purpose entities, and we have not guaranteed or otherwise supported the obligations of any other entity.



In September 2001 and April 2002, we entered into derivative transactions
with a financial institution that could have been settled by selling up to 307,000 shares of our stock to the financial institution at prices significantly higher than the market price per share of our stock at the inception of the transaction.
Alternatively, we had the option to settle these contracts by making a cash payment to the financial institution for the underlying value of the derivative contracts to the financial institution on the settlement date. These contracts were expected
to be settled by issuing shares of our stock in the event the options were exercised. Derivative transactions relating to 107,000 of these shares expired unexercised in September 2002. Derivative transactions relating to the remaining 200,000 shares
expired in April 2003. We received approximately $344,000 and $388,000 in proceeds for the sale of these call options that were accounted for as an increase to additional paid-in capital in accordance with EITF 00-19. The financial institution
advised us that it has engaged and may continue to engage in transactions, including the buying and selling of shares of our common stock, prior to expiration or exercise of these contracts, to offset its risks related to these transactions, which
may or may not affect the market price of our stock. All outstanding derivative transactions have expired unexercised. We may enter into similar transactions in the future, subject to market conditions. We enter into these transactions as a
potential method to raise capital and not to speculate on the future market price of our stock.



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We have entered into a letter of intent that contemplates the construction of a building by a third
party, that upon completion would be leased by us from the third party. During the three months ended June 30, 2003, additional effort on this project was suspended, and $925,000 of costs related to this project that the Company is responsible for
under the letter of intent were charged to expense.



Trimeris 401 (k) Plan



We have a 401(k) Profit Sharing Plan (the
Plan) covering all qualified employees. Employees may elect a salary reduction from 1% to 75% as a contribution to the Plan, up to the annual Internal Revenue Service allowable contribution limit. Employee contributions may not be
invested in Trimeris stock. The Plan permits us to match employees contributions. Beginning in 1998, we matched 100% of an employees annual contributions with Trimeris stock, provided the employee was employed on the last day of the
year. The number of shares issued is based on the employees contributions to be matched divided by the closing price of Trimeris stock on the last trading day of the year. At September 30, 2003, there were approximately 51,000 shares of our
stock held by the Plan. These shares vest ratably based on a participants years of service and are fully vested after four years of service. Employees may sell their vested shares at any time, subject to applicable laws and the requirements of
our insider trading policy, and reinvest the proceeds in the other investment options available within the Plan.



On October 17, 2003, Plan participants were notified of a change to the provider for our Plan that will be effective on December 1, 2003. As a result of
this change, there will be a temporary suspension of trading, or blackout period, in plan assets, including Trimeris stock held in the Plan. This blackout period is currently expected to begin on November 21, 2003 and end on December 15, 2003. As
required by the Sarbanes-Oxley Act of 2002, directors and officers of Trimeris will also be prohibited during this blackout period from executing transactions involving or relating to any shares of Trimeris stock acquired in connection with their
service or employment as a director or officer of Trimeris.



Net Operating
Loss Carryforwards



As of December 31, 2002, we had a net
operating loss carryforward of approximately $254.3 million. We have recognized a valuation allowance equal to the deferred asset represented by this net operating loss carryforward and other deferred tax assets, and therefore recognized no tax
benefit. Our ability to utilize these net operating loss carryforwards may be subject to an annual limitation in future periods pursuant to the change in ownership rules under Section 382 of the Internal Revenue Code of 1986, as amended.



Accounting and Other Matters



SFAS No. 143, Accounting for Asset Retirement Obligations,
addresses financial accounting and reporting for obligations associated with the retirement of tangible long-lived assets and the associated asset retirement cost. SFAS No. 143 requires us to record the fair value of an asset retirement obligation
as a liability in the period in which we incur a legal obligation associated with the retirement of tangible long-lived assets that results from the acquisition, construction, development and/or normal use of the assets. We also are required to
record a corresponding increase to the carrying amount of the related long-lived asset and to depreciate that cost over the life of the asset. The liability is changed at the end of each period to reflect the passage of time and changes in the
estimated future cash flows underlying the initial fair value measurement. SFAS No. 143 is effective for the fiscal years beginning after June 15, 2002. The adoption of SFAS No. 143 had no impact on our financial statements.



SFAS No. 146, Accounting for Costs Associated with Exit or Disposal
Activities, was issued in July 2002, and addresses financial accounting and reporting for costs associated with exit or disposal activities. It nullifies EITF Issue No. 94-3, Liability Recognition for Certain Employee Termination
Benefits and Other Costs to Exit an Activity (including Certain Costs Incurred in a Restructuring). SFAS No. 146 requires that a liability be recognized for costs associated with an exit or disposal activity only when the liability is
incurred. SFAS No. 146 also establishes fair value as the objective for initial measurement of liabilities related to exit or disposal activities. SFAS No. 146 is effective for exit or disposal activities that are initiated after December 31, 2002.
We believe that SFAS No. 146 will have no impact on our financial statements.



In November 2002, the Financial Accounting Standards Board Emerging Issues Task Force issued its consensus concerning Revenue Arrangements with Multiple Deliverables ( EITF 00-21). EITF 00-21 addresses how
to determine whether a revenue arrangement involving multiple deliverables should be divided into separate units of accounting, and if separation is appropriate, how the consideration should be measured and allocated to the identified accounting
units. EITF 00-21 is effective prospectively for arrangements entered into in fiscal periods beginning after June 15, 2003. We do not believe that adoption of EITF 00-21 will have a material impact on our financial statements.



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SFAS No. 148, Accounting for Stock-Based CompensationTransition and Disclosure, an amendment
of FASB Statement No. 123 was issued in December 2002. SFAS No. 148 amends SFAS No. 123 to provide alternative methods of transition for a voluntary change to the fair value method of accounting for stock-based employee compensation. In
addition, SFAS No. 148 amends the disclosure requirements of SFAS No. 123 to require prominent disclosures in both annual and interim financial statements. Certain of the disclosure modifications are required for fiscal years ending after December
15, 2002 and are included in the notes to our financial statements.



SFAS No. 149, Amendment of Statement 133 on Derivative Instruments and Hedging Activities, amends and clarifies financial accounting and reporting for derivative instruments, including certain derivative instruments embedded in
other contracts, collectively referred to as derivatives, and for hedging activities under SFAS No. 133, Accounting for Derivative Instruments and Hedging Activities. SFAS No. 149 is effective for contracts entered into or modified after
June 30, 2003, except certain hedging relationships designated after June 30, 2003, as defined in SFAS No. 149. In addition, except as defined in SFAS No. 149, all provisions of SFAS No. 149 should be applied prospectively. The adoption of SFAS No.
149 had no impact on our financial statements.



SFAS No. 150,
Accounting for Certain Financial Instruments with Characteristics of both Liabilities and Equity, was issued in May 2003. SFAS No. 150 establishes standards for how we classify and measure certain financial instruments with
characteristics of both liabilities and equity. It requires us to classify a financial instrument that is within its scope as a liability or an asset in some circumstances. Many of those instruments were previously classified as equity. SFAS No. 150
is effective for financial instruments entered into or modified after May 31, 2003, and otherwise is effective at the beginning of the first interim period beginning after June 15, 2003, except for mandatorily redeemable financial instruments of
nonpublic entities. It is to be implemented by reporting the cumulative effect of a change in an accounting principle for financial instruments created before the issuance date of SFAS No. 150 and still existing at the beginning of the interim
period of adoption. Restatement is not permitted. The adoption of SFAS No. 150 had no impact on our financial statements.



The FASB also issues exposure drafts for proposed statements of financial accounting standards. Such exposure drafts are subject to comment from the
public, to revisions by the FASB and to final issuance by the FASB as statements of financial accounting standards. Management considers the effect of the proposed statements on our financial statements and monitors the status of changes to issued
exposure drafts and to proposed effective dates.



Risk Factors



Our business is subject to certain risks and
uncertainties. Please read the Risk Factors and Business sections of our Annual Report on Form 10-K for the year ended December 31, 2002 filed with the SEC on March 27, 2003, which highlight some of these risks. If any of
these risks materialize, our business, financial condition and results of operations could be materially adversely affected.



Item 3. Quantitative and Qualitative Disclosures About Market Risk



Our exposure to market risk is primarily in our investment portfolio. We do not use derivative financial instruments for speculative or trading purposes.
Substantially all of our contracts are denominated in U.S. dollars; therefore, we have no material foreign currency risk. We have an investment policy that sets minimum credit quality standards for our investments. The policy also limits the amount
of money we can invest in any one issue, issuer or type of instrument. We have not experienced any material loss in our investment portfolio, and we believe the market risk exposure in our investment portfolio has remained consistent over this
period.



The table below presents the carrying value, which is
approximately equal to fair market value, and related weighted-average interest rates for our investment portfolio at September 30, 2003. Fair market value is based on actively quoted market prices. Our investments are generally most vulnerable to
changes in short-term interest rates in the United States. Substantially all of our investments mature in 12 months or less, and have been given a rating of A1 or higher by a nationally recognized statistical rating organization or are the debt
obligations of a federal agency and, therefore, we believe that the risk of material loss of principal due to changes in interest rates is minimal.



|                                      |  | Carrying Amount |         | AverageInterest Rate |     
|------------------------------------- |  | --------------- | ------- | -------------------- | ----
|                                      |  | (in thousands)  |         |                      |     
|Cash equivalentsfixed rate           |  | $               | 104,306 |                      | 1.13
|Short-term investmentsfixed rate     |  |                 | 5,500   |                      | 1.56
|Overnight cash investmentsfixed rate |  |                 | 949     |                      | 0.43
|                                      |  |                 |         |                      |     
|Total investment securities           |  | $               | 110,755 |                      | 1.15
|                                      |  |                 |         |                      |     





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In September 2001 and April 2002, we entered into a series of call transactions with respect to our
common stock. These transactions are described in detail under Item 2. Managements Discussion and Analysis of Financial Condition and Results of OperationsOff Balance Sheet Transactions. All outstanding call transactions have
expired unexercised.



Item 4. Controls and Procedures



Our Chief Executive Officer and Chief Financial Officer reviewed and evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this Quarterly Report on Form
10-Q, with the participation of the Companys management. Disclosure controls and procedures are controls and procedures that are designed to ensure that information required to be disclosed in our reports filed or submitted under the
Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the SECs rules and forms. In designing and evaluating the disclosure controls and procedures, the Company and its management
recognize that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. Based on their required evaluation, our Chief Executive Officer and Chief
Financial Officer have each concluded that our disclosure controls and procedures provide us with a reasonable level of assurance of reaching our desired disclosure control objectives and are effective in timely alerting them to material information
to be included in our periodic SEC reports.



There have not
been any significant changes in our internal controls or in other factors that could significantly affect these controls including corrective actions with regard to significant deficiencies or material weaknesses subsequent to the date of our most
recent evaluation of our internal controls. Internal controls are designed with the objective of providing reasonable assurance that (1) our transactions are properly authorized; (2) our assets are safeguarded against unauthorized or improper use;
and (3) our transactions are properly recorded and reported, all to permit the preparation of our financial statements in conformity with generally accepted accounting principles.



PART II. OTHER INFORMATION



Item 6. Exhibits and Reports on Form 8-K



| | (a) | Exhibits
| | --- | --------



The exhibits filed as part of this Quarterly Report on Form 10-Q are listed on the Exhibit Index and such list is incorporated herein by reference.



| | (b) | Reports on Form 8-K
| | --- | -------------------



We filed a report on Form 8-K on July 15, 2003 under Item 5 attaching a press release providing information on additional analysis of 24-week and 48-week
data from clinical trials of Fuzeon.



We furnished a report on
Form 8-K on July 22, 2003 under Item 9 attaching a press release describing our financial results for the quarter ended June 30, 2003.



We furnished a report on Form 8-K on July 24, 2003 under Item 9 attaching the transcript of our conference call held on July 22, 2003.



We filed a report on Form 8-K on September 15, 2003 under Item 5 attaching a
press release providing information on additional analysis of 48-week data from clinical trials of Fuzeon.



We filed a report on Form 8-K on September 26, 2003 under Item 5 attaching a press release providing information on the status of Fuzeon sales and launch
plans.



We furnished a report on Form 8-K on September 29,
2003 under Item 9 attaching the transcript of our conference call held on September 25, 2003.



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SIGNATURES



In accordance with the requirements of
the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.



|                  |  |  |  | Trimeris, Inc.(Registrant)                                                              
|----------------- |  |  |  | ----------------------------------------------------------------------------------------
|                  |  |  | 
|November 12, 2003 |  |  |  | By:                                                                                     
|                  |  |  |  | Dani P. Bolognesi Chief Executive Officer, and Chief Scientific Officer                 
|                  |  | 
|November 12, 2003 |  |  |  | /s/ ROBERT R. BONCZEK                                                                   
|                  |  |  |  | Robert R. Bonczek Chief Financial Officer (Principal Financial Officer)                 
|                  |  | 
|November 12, 2003 |  |  |  | /s/ TIMOTHY J. CREECH                                                                   
|                  |  |  |  | Timothy J. Creech Vice President of Finance and Secretary (Principal Accounting Officer)



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EXHIBIT INDEX





|Number |  | Description                                                                  
|------ |  | -----------------------------------------------------------------------------
|       | 
|31.1   |  | Rule 13a-14(a) Certification by Dani P. Bolognesi as Chief Executive Officer.
|       | 
|31.2   |  | Rule 13a-14(a) Certification by Robert R. Bonczek as Chief Financial Officer.
|       | 
|32.1   |  | Section 1350 Certification by Dani P. Bolognesi as Chief Executive Officer.  
|       | 
|32.2   |  | Section 1350 Certification by Robert R. Bonczek as Chief Financial Officer.  





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