SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549



FORM 10-K/A



ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934



For the Fiscal Year Ended December 31, 2013



Commission File Number 000-23930



AMPLIPHI BIOSCIENCES CORPORATION

(Exact name of registrant as specified in its
charter)



|Washington                          | 91-1549568                              
|----------------------------------- | ----------------------------------------
|                                    |                                         
|(State or other jurisdiction
    of | (I.R.S. Employer Identification
    No.)
|                                    |                                         
|incorporation and
    organization) |                                         



4870 Sadler Road, Suite 300

Glen Allen, Virginia 23060

(Address of principal executive offices, including
zip code)



(804) 205-5069

(Registrant’s telephone number)



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

None



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

Common Stock, par value $0.01 per share

(Title of class)



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



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



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



Indicate by check mark whether the registrant
has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted
and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such
shorter period that the registrant was required to submit and post such files). Yes  x    No   ̈



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



Indicate by check mark
whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.
See definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company”
in Rule 12b-2 of the Exchange Act.



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



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



As of June 30, 2013, the aggregate market
value of voting stock held by non-affiliates of the Registrant, based on the closing price of the Common Stock on June 28, 2013
as reported on the OTC Pink market, was approximately $10,122,521. Shares of Common Stock held by each officer and director and
by each person who owns 5% or more of the outstanding Common Stock have been excluded from this computation in that such persons
may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for other
purposes.



As of March 24, 2014, the Registrant had outstanding
182,535,562 shares of Common Stock.



Documents incorporated by reference: Portions
of the Registrant’s proxy statement to be filed pursuant to Regulation 14A within 120 days after Registrant’s
fiscal year end of December 31, 2013 are incorporated herein by reference into Items 10, 11, 12, 13 and 14 of Part III of
this annual report.











TABLE OF CONTENTS



AMPLIPHI BIOSCIENCES CORPORATION





|         |                                                                                                                  | Page
    No.
|-------- | ---------------------------------------------------------------------------------------------------------------- | ------------
|PART I   |                                                                                                                  |             
|         |                                                                                                                  |             
|Item 1.  | BUSINESS                                                                                                         | 6           
|         |                                                                                                                  |             
|Item 1A. | RISK FACTORS                                                                                                     | 29          
|         |                                                                                                                  |             
|Item 1B. | UNRESOLVED STAFF COMMENTS                                                                                        | 48          
|         |                                                                                                                  |             
|Item 2.  | PROPERTIES                                                                                                       | 48          
|         |                                                                                                                  |             
|Item 3.  | LEGAL PROCEEDINGS                                                                                                | 48          
|         |                                                                                                                  |             
|Item 4.  | MINE SAFETY DISCLOSURES                                                                                          | 48          
|         |                                                                                                                  |             
|PART II  |                                                                                                                  |             
|         |                                                                                                                  |             
|Item 5.  | MARKET FOR REGISTRANT’S
    COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES | 49          
|         |                                                                                                                  |             
|Item 6.  | SELECTED FINANCIAL
    DATA                                                                                      | 51          
|         |                                                                                                                  |             
|Item 7.  | MANAGEMENT’S
    DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS                        | 52          
|         |                                                                                                                  |             
|Item 7A. | QUANTITATIVE AND QUALITATIVE
    DISCLOSURES ABOUT MARKET RISK                                                   | 60          
|         |                                                                                                                  |             
|Item 8.  | FINANCIAL STATEMENTS
    AND SUPPLEMENTARY DATA                                                                  | 61          
|         |                                                                                                                  |             
|Item 9.  | CHANGES IN AND DISAGREEMENTS
    WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE                         | 62          
|         |                                                                                                                  |             
|Item 9A. | CONTROLS AND PROCEDURES                                                                                          | 62          
|         |                                                                                                                  |             
|Item 9B. | OTHER INFORMATION                                                                                                | 63          
|         |                                                                                                                  |             
|PART III |                                                                                                                  |             
|         |                                                                                                                  |             
|Item 10. | DIRECTORS, EXECUTIVE
    OFFICERS AND CORPORATE GOVERNANCE                                                       | 64          
|         |                                                                                                                  |             
|Item 11. | EXECUTIVE COMPENSATION                                                                                           | 64          
|         |                                                                                                                  |             
|Item 12. | SECURITY OWNERSHIP
    OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS               | 64          
|         |                                                                                                                  |             
|Item 13. | CERTAIN RELATIONSHIPS
    AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE                                    | 64          
|         |                                                                                                                  |             
|Item 14. | PRINCIPAL ACCOUNTANT
    FEES AND SERVICES                                                                       | 65          
|         |                                                                                                                  |             
|PART IV  |                                                                                                                  |             
|         |                                                                                                                  |             
|Item 15. | EXHIBITS AND FINANCIAL
    STATEMENT SCHEDULES                                                                   | 66          
|         |                                                                                                                  |             
|         | SIGNATURES                                                                                                       | 68          



2







EXPLANATORY NOTE REGARDING AMENDMENT
AND RESTATEMENT



Unless the context otherwise requires, we
use the terms “AmpliPhi Biosciences,” “AmpliPhi,” “we,” “us,” “the Company”
and “our” in this report to refer to AmpliPhi Biosciences Corporation and its subsidiaries.



This Annual Report on Form 10-K
for the fiscal year ended December 31, 2013, includes restatement of the following previously filed consolidated financial
statements and data (and related disclosures): (1) our consolidated balance sheet as of December 31, 2013, and our consolidated
statements of operations and comprehensive loss, consolidated statement of stockholders’ equity (deficit), and consolidated
statement of cash flows for the fiscal year ended December 31, 2013; (2) our consolidated balance sheet as of December 31,
2012, and our consolidated statements of operations and comprehensive loss, consolidated statement of stockholders’ equity
(deficit), and consolidated statement of cash flows for the fiscal year ended December 31, 2012; and (3) our management’s
discussion and analysis of financial condition and results of operations as of and for our fiscal years ended December 31,
2013 and 2012, contained in Part II, Item 7 of this Annual Report on Form 10-K.  All the aforementioned periods
are collectively referenced as “Affected Periods”.



Previously Amended Financial Statements



The Company’s previously issued amended
financial statements for December 31, 2013 to 1) remove deemed dividends booked on the issuance of preferred shares and 2) to
recognize the increase in derivative expense due to adding several features to the valuation model used to measure the compound
derivatives and to change from the utilization of a Black-Scholes valuation model to a Monte Carlo valuation model. Additional
paid in capital and accumulated deficit were reduced by $8,464,000 as a result of removing the deemed dividends. Loss on derivative
liabilities increased by $1,755,000 to $42,317,000 due to the change in the valuation model. The Company also contracted a valuation
team to review the purchase price allocation of its acquisition of Biocontrol. As a result, in-process research and development
(IPR&D) was restated and a new intangible asset, patents, was recognized. As a result, $493,000 of IPR&D for Biocontrol
was reclassified to patents and the Company recognized amortization expense for patents of $31,000 for both 2012 and 2013.



As a result of these corrections, the Company’s
net loss in 2013 increased $1,787,000 to $57,648,000. The net loss per share decreased by $0.07 per share to $(0.57) per share
which also reflects the removal of the deemed dividends.



Amended Financial Statements



The Company’s financial statements for
December 31, 2013 have been further amended to:



| | · | reclassify its
                                         Series B Redeemable Convertible Preferred Stock from Stockholders Equity (Deficit)
                                         to temporary equity due to the stocks redemption features. This adjustment resulted
                                         in a reclassification of $707,000 of Stockholders Equity (Deficit) to Series B
                                         Redeemable Convertible Preferred Stock, including the par value of these shares of $89,000
                                         and the accretion of the stocks redemption value of $618,000.
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | · | recognize deferred
                                         revenue and deferred costs related certain royalty contracts. This change resulted in
                                         a reduction in revenues of $244,000 and a reduction in G&A expense of $126,000.
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | · | reclassify certain
                                         warrants issued in 2011 as liability instruments. These warrants were previously recorded
                                         by error as equity instruments. This adjustment resulted in the in the establishment
                                         of a liability of $560,000 as of December 31, 2013.
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | · | adjust goodwill
                                         for the acquisitions of Biocontrol and SPH for acquired deferred tax liabilities and
                                         errors in previous reporting. This change resulted in an increase of $1,685,000 in goodwill
                                         related to the Biocontrol acquisition and $1,548,000 in goodwill related to the acquisition
                                         of SPH.
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | · | modify the key
                                         assumptions employed to value the compound derivative associated with the Series B Redeemable
                                         Convertible Preferred Stock and the Companys 2013 warrants, under a Monte Carlo
                                         valuation model. The change in assumptions resulted in a $6,348,000 increase in the compound
                                         derivative liability and a $353,000 reduction in the warrant liability related to 2013
                                         warrants. Loss on derivative liabilities increased by $7,013,000 for 2013.
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



3







As a result of these corrections, the Company’s
net loss in 2013, as amended, increased $6,935,000 to $64,583,000. The net loss per share attributable to common stockholders
increased by $0.07 per share to $(0.64) per share.



For more information regarding the restatement,
please refer to Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results
of Operations”; Note 14, “Correction of Errors” in Part II, Item 8; and Part II, Item 9A,
“Controls and Procedures.”



SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS



This report and certain
information incorporated herein by reference contain forward-looking statements, which are provided under the “safe harbor”
protection of the Private Securities Litigation Reform Act of 1995. These statements relate to future events or to our future
financial performance and involve known and unknown risks, uncertainties and other factors which may cause our actual results,
performance or achievements to be materially different from any future results, performance or achievements expressed or implied
by the forward-looking statements. Forward-looking statements include, but are not limited to, statements regarding:



| | · | our ability
                                         to manufacture, or otherwise secure the manufacture of, sufficient amounts of our product
                                         candidates for our preclinical studies and clinical trials;
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | our clinical
                                         development plans, including planned clinical trials;
| | - | -----------------------------------------------------------------------------------------------------------



| | · | our research
                                         and development plans, including our plans to initiate at least one new clinical study
                                         in 2015;
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | our ability
                                         to select combinations of phages to formulate our product candidates;
| | - | --------------------------------------------------------------------------------------------------------------------------



| | · | the safety
                                         and efficacy of our product candidates;
| | - | -------------------------------------------------------------------------------------------



| | · | the anticipated
                                         regulatory pathways for our product candidates;
| | - | --------------------------------------------------------------------------------------------------------



| | · | our ability
                                         to successfully complete preclinical and clinical development of, and obtain regulatory
                                         approval of our product candidates and commercialize any approved products on our expected
                                         timeframes or at all;
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | the content
                                         and timing of submissions to and decisions made by the FDA and other regulatory agencies;
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------



| | · | our ability
                                         to leverage the experience of our management team;
| | - | -------------------------------------------------------------------------------------------------------



| | · | our ability
                                         to attract and keep management and other key personnel;
| | - | ------------------------------------------------------------------------------------------------------------



| | · | the capacities
                                         and performance of our suppliers, manufacturers, contract research organizations, or
                                         CROs, and other third parties over whom we have limited control;
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | the actions
                                         of our competitors and success of competing drugs that are or may become available;
| | - | ----------------------------------------------------------------------------------------------------------------------------------------



| | · | our expectations
                                         with respect to future growth and investments in our infrastructure, and our ability
                                         to effectively manage any such growth;
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | the size and
                                         potential growth of the markets for any of our product candidates, and our ability to
                                         capture share in or impact the size of those markets;
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | the benefits
                                         of our product candidates;
| | - | --------------------------------------------------------------------------------



| | · | market and
                                         industry trends;
| | - | --------------------------------------------------------------------





4







| | · | the effects
                                         of government regulation and regulatory developments, and our ability and the ability
                                         of the third parties with whom we engage to comply with applicable regulatory requirements;
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | our financial
                                         performance, including our  net operating losses,  derivative liabilities, cash flows, expected uses of anticipated cash
                                         flow, funding requirements and market risk;
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | our expectations
                                         regarding future planned expenditures;
| | - | ------------------------------------------------------------------------------------------------





| | · | our ability
                                         to effectively remediate any significant deficiencies or material weaknesses in our internal
                                         control over financial reporting;
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | our ability
                                         to achieve and maintain effective internal control over financial reporting in accordance
                                         with Section 404 of the Sarbanes-Oxley Act;
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | our ability
to obtain, maintain and successfully enforce adequate patent and other intellectual property protection of any of our products
and product candidates; and
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------





| | · | our plans to
                                         potentially transact business outside the United States.
| | - | --------------------------------------------------------------------------------------------------------------



In some cases, you
can identify these statements by terms such as “anticipates,” “believes,” “could,” “estimates,”
“expects,” “intends,” “may,” “plans,” “potential,” “predicts,”
“projects,” “should,” “will,” “would” or the negative of those terms, and similar
expressions. These forward-looking statements reflect our management’s beliefs and views with respect to future events and
are based on estimates and assumptions as of the date of this Annual Report and are subject to risks and uncertainties. We discuss
many of these risks in greater detail in the section entitled “Risk Factors.” Moreover, we operate in a very competitive
and rapidly changing environment. New risks emerge from time to time. It is not possible for our management to predict all risks,
nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may
cause actual results to differ materially from those contained in any forward-looking statements we may make. Given these uncertainties,
you should not place undue reliance on these forward-looking statements.



This Annual Report
on Form 10-K includes trademarks and registered trademarks of AmpliPhi Biosciences Corporation. Products or service names
of other companies mentioned in this Annual Report on Form 10-K may be trademarks or registered trademarks of their respective
owners.



As used in this Annual
Report, unless the context requires otherwise, the “Company,” “we,” “us” and “our”
refer to AmpliPhi Biosciences Corporation, a Washington corporation, or, where appropriate, Targeted Genetics Corporation or AmpliPhi
Biosciences Corporation, a Delaware corporation to be formed in connection with the Company’s planned reincorporation.



5







PART I



Item 1.
BUSINESS.



Company History



We were incorporated under the laws of the
State of Washington in March 1989 as a wholly owned subsidiary of Immunex Corporation and began operations as an independent company
in 1992 as Targeted Genetics Corporation.



In January 2011, we completed the acquisition
of Biocontrol Ltd, which we refer to as Biocontrol, an antimicrobial biotechnology company based in the United Kingdom, with the
goal of developing their phage therapy programs using funding from the sale of our legacy gene therapy assets. On February 22,
2011, we changed our name to “AmpliPhi Biosciences Corporation.”



In November 2012, we completed the acquisition
of Special Phage Holdings Pty Ltd, a company based in Australia, which we refer to as SPH, pursuant to our offer to acquire all
outstanding shares of SPH from its shareholders under the terms of a Shareholder Sale Agreement and a Managers Warranty Deed.
SPH was formed in 2004 to address the rapidly escalating problem of antibiotic resistance through the development of a series
of bacteriophage-based treatments.



We intend to reincorporate as AmpliPhi Biosciences
Corporation in the State of Delaware.



Company Overview



We are a biotechnology company focused on
the discovery, development and commercialization of novel phage therapeutics. Our proprietary pipeline is based on the use of
bacteriophages, a family of viruses that infect only bacteria. Phages have powerful and highly selective mechanisms of action
that permit them to target and kill specific bacterial pathogens, including the so-called multi-drug-resistant (MDR) or “Superbug”
strains.



We believe that we are a leading developer
of phage-based therapeutics. We are combining our proprietary approach and expertise in identifying, characterizing and developing
naturally occurring bacteriophages with that of our collaboration partners in bacteriophage biology, drug engineering, development
and manufacturing, to develop second-generation bacteriophage products. We believe that phages represent a promising means to
treat bacterial infections, especially those that have developed resistance to current medicines.



The extensive use of antibiotics, since their
discovery in the 1940s, has resulted in drug resistance among many disease-causing bacteria. Resistance to antibiotics, according
to the Centers for Disease Control (CDC), threatens to reverse the medical advances of the last half-century. Examples of clinically
important microbes that are rapidly developing resistance to available antimicrobials include bacteria that cause skin, bone,
lung and bloodstream infections (e.g., S. aureus and MRSA), pneumonia and lung infections in the community, hospital
and cystic fibrosis (e.g., A. baumanii, P. aeruginosa, and K. pneumoniae ), meningitis
(e.g., S. pneumonia ), urinary tract and gastrointestinal infections (e.g., E. coli and C.
difficile ). As a phage kills bacteria in ways entirely unlike the mechanisms used by antibiotics, MDR bacteria are not
resistant to a phage in the same manner. Furthermore, as new resistant bacteria emerge, it should be possible to identify new
phages that will still have efficacy.



Our lead program is AmpliPhage-002, for the
treatment of S. aureus infections (including methicillin-resistant MRSA). We also have two other product candidates in
development: AmpliPhage-001 for the treatment of P. aeruginosa lung infections in CF patients, and AmpliPhage-004 for the
treatment of C. difficile infections.



We are developing these phage product candidates
using our proprietary discovery and development platform, which is designed for rapid identification, characterization and manufacturing
of multiple phage therapies. Each product candidate combines several carefully chosen phages which target a specific disease-causing
bacterial pathogen such as MRSA, P. aeruginosa and C. difficile. We believe that our understanding of unique regulatory
and development requirements of bacteriophage biology combined with the scientific expertise of our collaboration partners will
enable the rapid advancement of phage treatments through the clinic and eventually to the market.



6







In March 2013, we entered into an Exclusive
Channel Collaboration (ECC) with Intrexon Corporation, which we refer to as Intrexon, directed towards the research, development
and commercialization of new bacteriophage-based therapies to target specific antibiotic-resistant infections, including for use
in the treatment of bacterial infections associated with acute and chronic wounds, the treatment of acute and chronic P. aeruginosalung infections, and the treatment of infections of C. difficile.



In April 2013, we entered into a collaboration
agreement, which we refer to as the April Collaboration Agreement, and on September 5, 2013, we entered into a license agreement,
which we refer to as the Leicester License Agreement, with the University of Leicester to develop a phage therapy that targets
and kills all toxin types of C. difficile. Pursuant to the Leicester License Agreement, we may be obligated to pay the
University of Leicester a royalty in the single digits and an aggregate of up to £575,000 million in milestone payments.
We also entered into a collaboration agreement on August 1, 2013, which we refer to as the August Collaboration Agreement, with
the University of Leicester and the University of Glasgow, whereby the University of Glasgow will carry out certain animal model
development work. Pursuant to the August Collaboration Agreement, we may be obligated to pay up to a total of approximately £205,000
in milestone payments.



In June 2013, we entered a cooperative research
and development agreement (CRADA) with the United States Army Reserve Medical Corps (USAMRMC) and the Walter Reed Army Institute
of Research (WRAIR) focusing on developing bacteriophage therapeutics to treat S. aureus, E. coli and P. aeruginosainfections.



We plan to initiate a Phase 1 study of AmpliPhage-002
in the first half of 2015 to demonstrate the safety of AmpliPhage-002 when administered to healthy volunteers colonized by S.
aureus. The study population will be enriched to contain subjects with MRSA colonization. If that study is successful, we
then intend to conduct a Phase 2 study in S. aureus for wound and skin infections.



The Need for New Anti-Infective Therapies



The rapid and continuous emergence of antibiotic-resistant
bacteria has become a global crisis. While the numbers of novel anti-infective therapies in development are at historically low
levels, antibiotic-resistant infections have dramatically increased. The CDC estimates that more than two million people in the
United States acquire an antibiotic-resistant infection each year and more than 23,000 of these prove fatal. It is estimated that
50 – 70% of hospital-acquired infections are resistant to first-line anti-infective therapies. The cumulative annual cost
for treating resistant bacterial infections in the United States alone is estimated to be $20 billion, while the global antibiotics
market opportunity is estimated to be $40.3 billion by 2015.



The CDC’s latest report on the matter,
Antibiotic Resistance Threats in the United States, 2013, notes that there are “potentially catastrophic consequences
of inaction” and ranks C. difficile as belonging to the highest tier of threat, “Urgent Threats.” Despite
the potential market opportunity, only two new antibacterial drug applications were approved between 2010 and 2012 compared to
eighteen in the period between 1980 and 1984. One of the primary CDC recommendations is the development of new antibiotics to
diversify treatment options.



Product Candidates



AmpliPhage-002: Wound and Skin Infections Caused by S. aureus



In conjunction with our CRADA with the USAMRMC,
we are developing a phage product that is intended to effectively treat acute and chronic wound and skin infections caused by
S. aureus, including infections caused by methicillin-resistant (MRSA) strains of the same bacterium. MRSA infections are
one of the most common causes of hospital-acquired (nosocomial) infections and Global Data estimates the MRSA market for infections
alone was more than $2.7 billion in 2007. This market is forecast to grow to more than $3.5 billion by 2019.



By screening our proprietary library of phage
samples against a panel of S. aureus bacteria, we have selected a phage product mix that has demonstrated in in vitrostudies greater than 85% efficacy with high overlap against a global diversity panel that includes some of the most virulent
isolates of S. aureus, including MRSA strains identified by the U.S. Army.





7







We plan to initiate a Phase 1 study of AmpliPhage-002
in the first half of 2015 to demonstrate the safety of AmpliPhage-002 when administered to healthy volunteers colonized by S.
aureus. The study population will be enriched to contain subjects with MRSA colonization. If that study is successful, we
then intend to conduct a Phase 2 study in S. aureus for wound and skin infections.



After extensive financial and capability evaluation
and a global search we have elected to proceed with cGMP manufacturing at a wholly owned facility that has been constructed in
Ljubljana, Slovenia. We have been able to access and hire highly skilled process development and phage manufacturing expertise
and believe that we now have control of our proprietary platform from phage identification through final product fill and finish.
Our facility inclusive of laboratory and office space is approximately 4,000 sq. ft. and is expected to produce cGMP product by
the end of 2014 for our currently planned and future studies. We believe that this facility should be sufficient to meet our product
needs through Phase 3 and initial commercialization. Our current formulation for AmpliPhage-002 is intended for nasal delivery
via a small spray device. We plan to further formulate our product for delivery to patients with wound and skin infections.



AmpliPhage-001: Lung Infections in Cystic Fibrosis (CF) Patients
Caused by P. aeruginosa



According to Global Data in April 2013, the
market for CF therapeutics was $1.2 billion in 2012 and forecasted to grow to $4.6 billion in 2017, with 65% of this market in
the United States. One of our lead programs targets P. aeruginosa, the most prevalent bacterial infection that leads to
the highest mortality in patients with CF with approximately 440 deaths per year in the United States. To develop our products,
we have created a global “diversity” panel of relevant P. aeruginosa clinical isolates from CF clinics in the
United States, Europe and Australia. Clinical isolates are bacteria isolated from patients. This diversity panel has been screened
against our phage library that was isolated and characterized according to our proprietary discovery and development platform.
We have demonstrated in vitro that we are able to effectively kill the targeted bacteria with a mixture of a few phages
propagated in carefully selected bacterial hosts. Furthermore, our phage mix was selected to exhibit a high degree of overlap,
defined as the number of bacteria targeted by more than one phage in the product. We believe that high overlap is an important
factor in preventing bacteria from developing resistance to our phage products.



In collaboration
with Institut Pasteur (Paris, France) and Brompton Clinic, Imperial College (London, United Kingdom), we have demonstrated in
the preclinical studies described below that phages can effectively treat infections in animal models of acute P. aeruginosalung infections. The graphic below shows the three groups from a study conducted at the Institute Pasteur. Each group consisted
of eight mice. Group 1 was treated with Placebo, or PBS, Group 2 was treated with an antibiotic (note the model was optimized
for this antibiotic) and Group 3 was treated with an AmpliPhi phage mix. The colored regions, measured by light, intensity, or
luminescence, demonstrate where the P. aeruginosa infection is active and the bacteria are actively replicating. By the
24 th hour, the surviving untreated animals (Group 1) are sacrificed as the infection has spread and in some cases
has already proved lethal whereas the two treatment groups (Group 2, antibiotic and Group 3, phage) demonstrate effective reduction
of the active infection.





8











Average luminescence for each group is shown
below:







9







Bacterial counts and the number of bacteriophage
infection units detected by assay, or phage titers, were measured in these animals after 24 hours, and the results demonstrated
that our phage mix effectively lowered the bacterial counts, or CFU, in the mouse lung to levels comparable to antibiotic treatment
(PBS vs. antibiotic, p=0.0003; PBS vs. bacteriophage, p=0.0003). Furthermore, it was evident that phage replicated to high levels
in the infected lung. These results are shown in the graphics below.







In a separate in vivo study of acute
P. aeruginosa infection of the mouse lung conducted at the Brompton Clinic, results demonstrated that our phage mix reduced
CFU levels upon simultaneous intranasal administration (six mice in each of the treatment and control groups) and also when administered
24 hours post-bacterial infection (seven mice in the treatment group and eight mice in the control group) using Pa01, a standard
strain of P. aeruginosa. These results are depicted in the graphics below.







10







Importantly, a preclinical study conducted
at the Institut Pasteur in mice (12 mice in each of the treatment and control groups) demonstrated the ability of our phage mix
to reach the lung within two hours of being delivered by oral administration. The phage levels increased between two and six hours
post-treatment, and the results were statistically significant (p-value <0.001). A p-value is a statistical measure of the
probability that the difference in two values could have occurred by chance. The smaller the p-value, the greater the confidence
that the results are significant. These results demonstrate that when orally administered in mice, phages not only reached the
lungs but were also able to infect and multiply in target bacteria.



We were granted an advisory meeting with United
Kingdom Medicines and Healthcare products Regulatory Agency, (MHRA) in the first quarter of 2014 to discuss our plans and intent
to move the CF program into additional preclinical testing in preparation for a Phase 1/2 study in CF patients. We also sought
advice and comment that our planned Chemistry Manufacturing and Controls (CMC) plans were acceptable to the MHRA. The MHRA concurred
with our approach and plans as presented, including a first in man dose ranging clinical study in CF patients. Subject to the
availability of adequate financing, we expect to continue product selection and formulation work. Upon final product selection,
we plan to manufacture the AmpliPhage-001 product in our facility in Ljubljana, Slovenia.



We believe that successful proof of concept
in this lung indication could lead to other acute and chronic lung infection markets, such as Ventilator Associated Bacterial
Pneumonia (VABP) and Chronic Obstructive Pulmonary Disease (COPD). The bacteria we are currently targeting are predominant pathogens
in both of these indications.



AmpliPhage-004: Gastrointestinal (GI) Infection Caused by C.
difficile Infection (CDI)



From 2000 through 2007, deaths in the United
States from C. difficile infection increased over 400%. Over 90% of such deaths occur in hospitalized or confined patients
over the age of 65. Global Data estimates that the major European Union and United States markets for CDI therapies grew to more
than $314 million in 2011 and they are expected to grow to more than $500 million by 2019.



According to the CDC, almost 250,000 people
each year require hospitalization for C. difficile infections, and at least 14,000 people die each year in the United States
from C. difficile infections. We are actively working with researchers at the University of Leicester and the University
of Glasgow to develop a phage therapy that targets and kills all toxin types of C. difficile. We believe that orally delivered
phages are well suited to treat CDI. Within this collaboration, researchers at the University of Leicester have discovered phages
that have been shown to be effective against clinically-relevant strains of C. difficile isolated from around the world.
Since current therapies against C. difficile are considered less than optimal, we believe that there is a significant market
opportunity for our product in treating this disease.



Prior Clinical Development



In 2010, the Company’s wholly owned
subsidiary, Biocontrol, reported a double-blind placebo-controlled, randomized Phase 1/2 clinical trial targeting chronic ear
infections (otitis) caused by antibiotic-resistant P. aeruginosa. This was the first, and to date, we believe the only,
regulated efficacy trial of bacteriophage therapy in humans that has been reported. Positive results were reported demonstrating
decreasing levels of P. aeruginosa in the ear and improvement of clinical condition with a single input dose of 2.4 nanograms
of bacteriophage preparation. While this was a small trial (n=24), changes from baseline at the end of the trial in the test group
(n=12) were statistically significant for both clinical condition (p=0.001) and bacterial load (p=0.016). No significant changes
were seen in the control group (n=12) compared to baseline at the end of the trial. Difference between test and control groups
was statistically significant by analysis by covariance (ANCOVA) on day 21 for bacterial count (p=0.0365). These results will
need to be validated in larger well-controlled trials.



Anti-Infective Therapeutics Market



The market opportunity for antibiotics is
extremely large, with the market estimated to reach $40.3 billion in annual sales globally in 2015.



Almost one in every five deaths worldwide
occurs as a result of infection and, according to the World Health Organization, or WHO, many bacterial infections will become
difficult or impossible to cure as the efficacy of current antibiotic drugs wanes. Despite the advances in antimicrobial and vaccine
development, infectious diseases still remain as the third-leading cause of death in the United States and the second-leading
cause of death worldwide.



11







The number of new antibiotics approved by
the FDA and other global regulatory authorities has declined consistently over the last two decades. According to the Infectious
Diseases Society of America, as of early 2013, only two new antibiotics have been approved by the FDA since 2009 and only seven
new antibiotics targeting multi-drug-resistant Gram-negative bacilli were in either Phase 2 or Phase 3 trials. This dramatic decrease
in productivity is evidenced by only two classes of antibiotics oxazolidinones and cyclic lipopeptides having been developed and
launched in the last 30 years. At the same time, the evolution of antibiotic-resistant bacteria has led to an increasing number
of infections for which there are no current treatments available.



Hospital-acquired (nosocomial) infections
are a major healthcare problem throughout the world, affecting developed countries as well as resource-poor countries. The WHO
reports that hospital-acquired infections are among the major causes of death and increased morbidity among hospitalized patients
and estimates that more than 1.4 million people per year worldwide suffer from infectious complications from a hospital stay.



A recent CDC report also cites that in the
United States, between 5 and 10% of all patients admitted to a hospital will be affected by a hospital-acquired infection during
their stay, typically requiring extended stays and additional care. There is also a significant risk of death from such infections.
In the United States, the CDC estimates that approximately 99,000 people die from hospital-acquired infections each year. The
Cystic Fibrosis Foundation estimates that P. aeruginosa accounts for 10% of all hospital-acquired infections.



Infections also occur in connection with Cystic
Fibrosis (CF), which is a genetic disease affecting primarily Caucasians of northern European descent. According to the Cystic
Fibrosis Foundation, there are approximately 50,000 cases of CF in North America and Europe. P. aeruginosa opportunistically
infects the mucous membranes, primarily the lungs, of CF patients and quickly grows out of control, resulting in pneumonia. P.
aeruginosa infections are notoriously resistant to known antibiotics, and treatment may be further complicated by the formation
of biofilms. Biofilms are organized structures of microorganisms growing on solid surfaces (such as lung tissue) and often limit
access of antibiotics to the covered tissues. Since phages attack bacteria in a manner independent of chemical antibiotic resistance
mechanisms and can infect bacteria growing in biofilms, we believe that P. aeruginosa infection among CF patients represents
a compelling indication to pursue. The availability of Pseudomonas-specific phages along with validated animal models of
P. aeruginosa lung infections has contributed to the development of our bacteriophage program in CF.



Compounding the above situations is the alarming
and continuing rise in the prevalence of antibiotic-resistant bacterial infections. This, coupled with the lack of new antibiotics
in current discovery and development pipelines, has generated a significant clinical management problem worldwide, leading to
increases in morbidity and mortality due to these antibiotic-resistant bacteria as well as increases in healthcare costs.



The first of these antibiotic-resistant infections
to reach epidemic proportions was caused by the Gram-positive bacterium S. aureus. S. aureus resistance to a broad
range of antibiotics has necessitated the use of expensive and potentially toxic “drugs of last resort”, most notably
vancomycin. Antibiotic-resistant forms of S. aureus, usually termed MRSA (methicillin-resistant S. aureus ), VISA
(vancomycin-intermediate S. aureus ), or VRSA (vancomycin-resistant S. aureus ), can be extremely challenging to
treat. Although several antibiotics targeting S. aureus have been developed, rapidly developing bacterial resistance has
been noted for all of these including linezolid, daptomycin and tigecycline. On the basis of historical evidence, resistance to
these existing products is likely to increase over time, and this picture is further complicated by the reduced efficacy of conventional
antibiotics against Staphylococcus biofilms.



Typically S. aureus infection causes
a variety of suppurative (pus-forming) infections and toxinoses in humans. It causes superficial skin lesions such as boils, styes
and furuncles; more serious infections such as pneumonia, mastitis, phlebitis, meningitis and urinary tract infections; and deep-seated
infections, such as osteomyelitis and endocarditis. S. aureus is the leading cause of wound infections, in particular,
hospital-acquired (nosocomial) infection of surgical wounds and infections associated with indwelling medical devices. S. aureusis the leading pathogen in healthcare-associated infections in the United States as a whole, accounting for 30.4% of surgical
site infections (SSI), and 15.6% of such infections overall.



12







Anti-Infective Treatments with Bacteriophages



Background



The dramatic rise in antibiotic resistance,
the appearance of an increasing number of new “superbugs” and the lack of new antibiotics in the pipeline has prompted
calls to action from many of the world’s major health bodies such as the CDC and the WHO, who warn of an “antibiotic
cliff” and a “post-antibiotic era.” In 2009, the European Antimicrobial Resistance Surveillance System, or EARSS,
concluded that “the loss of effective antimicrobial therapy increasingly threaten[s] the delivery of crucial health services
in hospitals and in the community.” This conclusion was reinforced by The Antimicrobial Availability Task Force, or AATF,
of the Infectious Diseases Society of America, or IDSA, and the European Centre for Disease Prevention and Control, or ECDC, in
conjunction with the European Medicine Agency, or EMA. Clearly, there is a pressing need to find alternative antibacterial therapies.



Bacteriophage therapy has the potential to
be an alternative method of treating bacterial infection. Phages are ubiquitous environmental viruses that grow only within bacteria.
The name “bacteriophage” translates as “eaters of bacteria” and reflects the fact that as they grow, phages
kill the bacterial host by multiplying inside and then bursting through the cell membrane in order to release the next generation
of phages. Phages can differ substantially in morphology and each phage is active against a specific range of a given bacterial
species. Phages were first discovered in 1915 at the Institut Pasteur and were shown to kill bacteria taken from patients suffering
from dysentery. Furthermore, it was noted that phage numbers rose as patients recovered from infection, suggesting a direct association.



Life Cycle of a Bacteriophage







Until the discovery of effective antibiotics,
phages were used as an effective means of combating bacterial infection. When broad-spectrum antibiotics came into common use
in the early 1940s, phages were considered unnecessary, with antibiotics being seen for many years as the answer to bacterial
disease. This attitude persisted until the development of the wide-ranging, and in some cases total, resistance to antibiotics
seen within the last 10 years.



It is now clear that bacteria can adapt to
resist chemical antibiotics. In addition, there is now strong pressure to limit the use of antibiotics for human and veterinary
use. There is a real need for different approaches to the control of antibiotic-resistant bacterial infections. In the light of
current knowledge, it is apparent that early work with phages was hindered by poor understanding of the biology of phages, leading
to exaggerated claims that damaged the reputation of phage therapy. Several companies in the 1920s and 1930s began to produce
and market bacteriophage preparations. Unfortunately, these were often marketed with promises of efficacy against diseases that
are now known to have nothing to do with bacteria, and many preparations themselves failed to actually contain bacteriophages.
These conditions made bacteriophage subject to understandable skepticism. Now, with the far greater understanding of phages and
their function that is now available, it is possible to identify the bacteria that are causing disease and then target them with
highly specific phages that will kill only those bacteria.



Phages have the potential to provide both
an alternative to, and a synergistic approach with, antibiotic therapy. Since they use entirely different mechanisms of action,
phages are unaffected by resistance to conventional antibiotics. Phage containing certain enzymes also have the ability to disrupt
bacterial biofilms, thus potentiating the effect of chemical antibiotics when used in combination with them.



13







In fact, the ability to isolate and develop
phages for any of a broad range of bacterial targets, combined with their ability to disrupt bacterial biofilms, suggests strong
potential for this approach in the control of bacterial infections. Published literature indicates that phages have the potential
to be used as topical agents for the control of bacterial infection, and that such use is compatible with the approaches that
have been shown to be effective in the treatment of wound injuries.



Bacteriophage therapy for the treatment of
bacterial infections has been in constant use since 1917. Most of the research on phage-based therapy was conducted in the former
Soviet Union prior to and immediately after World War II. While the West primarily focused resources into the development of chemical
antibiotics, physicians and researchers in the Soviet Union were mass-producing phages and demonstrating their efficacy against
a wide range of bacterial infections affecting the GI tract (dysentery), wounds (surgical and combat), skin (boils) and bone (osteomyelitis).
While these studies are compelling, most lacked appropriate control group design or lacked control groups completely. Furthermore,
the standard of care has changed substantially during the ensuing decades since those studies were performed, making claims of
improved cure rates open for debate.



Despite numerous encouraging case studies,
bacteriophage treatment was never adopted by Western medicine due to a lack of robust scientific evidence generated through systematically
planned, controlled and regulated clinical trials. Recently, however, an increasing number of papers, reviews and books appearing
on bacteriophage therapy indicate an increasing appetite among the scientific community and healthcare industry for developing
bacteriophage therapy as part of mainstream medicine. Current biomedical technology is vastly superior to that available during
the early days of bacteriophage therapy and our understanding of phage biology and the mechanisms of phage-bacterial host interaction
have improved, along with advances in knowledge concerning bacterial infection. Although our knowledge of the biology, genetics
and bactericidal efficacy of bacteriophages in vitro is impressive, less is known about their pharmacokinetic behavior
in vivo, in particular in human subjects. To date very few human clinical trials have been conducted to modern standards
in either the United States or Europe. In 2009, a U.S. Phase 1 clinical trial carried out at the Southwestern Regional Wound Care
Center in venous ulcers using a mixture or “cocktail” of phages which individually attack different species of bacteria
( S. aureus, P. aeruginosa and E. coli ) was reported. The results of this trial showed this multi-bacteriophage
preparation to be safe in trial subjects.



These trials, alongside the body of less well-conducted
studies, suggest that phage therapy shows promise for treating infectious diseases caused by antibiotic-resistant bacteria. One,
conducted by the Polish Academy of Sciences, started in 2005 and is treating a broad range of infections and clinical conditions
associated with antibiotic-refractory infections. This work derives from a phage therapy clinic that has operated at this location.
A second is the European Union-sponsored “Phagoburn” Phase 1/2 clinical trial, which is being conducted at multiple
centers in France, Belgium and Switzerland. The project has been under way since June 2013, using a large phage mix for treatment
of burn wounds infected with E. coli and P. aeruginosa.



Our Strategy



Our strategy is to use techniques of modern
biotechnology and current state-of-the-art practices for drug development in concert with existing regulatory guidance to develop
a pipeline of bacteriophage products that will destroy bacterial pathogens such as MRSA, which are resistant to chemical antibiotics.
Our business strategy will apply state-of-the-art techniques in molecular biology and in clinical trial design to build upon the
long successful history of using phages therapeutically to treat and cure infections.



In collaboration with the U.S. Army, we plan
to study the safety and tolerability of our phage product (AmpliPhage-002) developed for treating S. aureus (MRSA) infections
in a Phase 1 study. We expect this study to commence in the first half of 2015. If the Phase 1 study is successful, we plan to
conduct a Phase 2 study of wounds and skin infections. Additionally, subject to the availability of adequate financing, we expect
to continue product selection and formulation work for AmpliPhage-001, and following final product selection, in conjunction with
leading Centers of Excellence in the UK, we would expect to conduct a Phase 1/2 study using AmpliPhage-001 to treat CF patients
with P. aeruginosa lung infections. Through our collaboration agreement with the University of Leicester, we are also continuing
to develop AmpiPhage-004 to treat patients suffering from serious gastrointestinal infections caused by C. difficile.



14







Recent Acquisitions



In January 2011, we completed the acquisition
of Biocontrol, with the goal of developing their phage therapy programs using funding from the sale of our legacy gene therapy
assets. Under the terms of our acquisition of Biocontrol, we issued 22,817,198 shares of our common stock to the shareholders
of Biocontrol with a total fair value of approximately $8.8 million as of January 6, 2011, resulting in Biocontrol’s former
shareholders owning approximately 50% of our outstanding equity securities at the time. As a condition to closing the acquisition,
Biocontrol raised approximately £200,000 (US$310,000) in working capital for use by us.



In November
2012, we acquired SPH, pursuant to our offer to acquire all outstanding shares of SPH from its shareholders under the terms of
a Shareholder Sale Agreement and a Managers Warranty Deed, collectively referred to as the SPH Agreements, in exchange for up
to 40,000,000 shares of our common stock. 20,000,000 of those shares were issued directly to the selling stockholders of SPH upon
the closing of the acquisition, and the remaining 20,000,000 shares were issued and held in escrow. Of the escrow shares, 8,000,000
shares, referred to as Claims Shares, were subject to claims by us for breaches of representations by the selling stockholders
of certain individual representations and certain additional representations made with respect to SPH itself and its operations
by Dr. Anthony Smithyman and Mrs. Margaret Smithyman, the two largest shareholders of SPH, referred to as the Managers. The Claims
Shares were released from escrow in November 2013, 12 months following the closing of the acquisition. The remaining 12,000,000
shares held in escrow, referred to as Contingent Shares, are to be released to the Managers upon the meeting (within 24 months
of the closing) of three clinical and developmental milestones relating to SPH’s phage therapy projects. At the satisfaction
of each of those milestones, one third of the Contingent Shares will be released to the Managers. If, within 24 months of the
closing, any of those milestones has not been met, as a result of our failure to use best endeavors to cause such milestones to
occur or as a result of a natural and unavoidable catastrophe that prevents the milestone from occurring, the unsatisfied milestone
will be deemed satisfied and we will be required to release the applicable number of Contingent Shares to the Managers. Contingent
Shares relating to milestones that have not been released to the Managers as of the 24th month following the acquisition,
and that are not subject to claim by the Managers that such milestone was met or is otherwise due, will be returned to us. The
Contingent Shares are also subject to claims for breaches of the representations being made by the Managers to the extent that
the Claims Shares are insufficient to satisfy our claims under the terms of the SPH Agreements. Further, the Managers are not
eligible to retain any dividends or other distributions by us that are allocable to unreleased Contingent Shares and have designated
our President and Chairman of the Board, and each of them, as proxies to vote unreleased Contingent Shares.



In connection with our acquisition of SPH,
we entered into certain other arrangements, including the repayment under a Loan Repayment Deed (as amended) of a $770,000 loan
originally made by Cellabs Pty Ltd, or Cellabs, an Australian company affiliated with Dr. Smithyman, to SPH, a consulting agreement
with Dr. Smithyman and the payment of $3,017 per month to Cellabs for our laboratory space in Australia. Under the terms of the
Loan Repayment Deed, the loan from Cellabs to SPH was to be repaid and fully satisfied partly in cash and partly by issuing 2,000,000
shares of our common stock to Cellabs. As of December 31, 2013, $350,000 has been paid by us to Cellabs and all 2,000,000 shares
have been issued. The SPH acquisition also included several phage therapy projects which had reached the pre-clinical or animal
study stage, including the Brompton Hospital CF study, the Adelaide University MRSA chronic rhinosinusitis study and the University
of Leicester C. difficile project. We believe that acquisition of SPH brings substantial phage scientific expertise and
know-how to the Company sufficient to develop, manufacture and commercialize phage-based therapeutics. Under the terms of the
consulting agreement with Dr. Smithyman, we were obligated to pay a fee of $10,000 per month to Dr. Smithyman, who provided management
consulting services as an independent contractor for an initial term of 12 months ending October 2013. Between the acquisitions
of Biocontrol and SPH, we believe that we are the leading therapeutically focused phage company in the world.



Strategic Alliances and Research Agreements



As discussed below, we have established collaborations
with Intrexon, the U.S. Army and the University of Leicester, which provide us with access to the considerable scientific, developmental,
and regulatory capabilities of our collaborators. We believe that our collaborations contribute to our ability to rapidly advance
our product candidates, build our product platform and concurrently progress a wide range of discovery and development programs.



15







Exclusive Channel Collaboration with Intrexon



On March 29, 2013, we entered into the ECC
with Intrexon that governs a collaboration arrangement in which AmpliPhi uses Intrexon’s technologies directed towards the
research, development and commercialization of new bacteriophage-based therapies to target specific antibiotic-resistant infections.
We believe that combining the broadest and most advanced synthetic biology platform with our world-leading phage capabilities
will lead to the development of innovative second-generation phage products. The ECC establishes committees comprised of representatives
of the Company and Intrexon that govern activities related to the bacteriophage programs in the areas of project establishment
and prioritization, as well as budgets and their approval, chemistry, manufacturing and controls, clinical and regulatory matters,
commercialization efforts and intellectual property.



Intrexon is
a publicly held biotechnology company focused on the industrial engineering of synthetic biology. According to Intrexon, their
advanced bioindustrial engineering platform enables Better DNATM technology by combining DNA control systems with corresponding
advancements in modular transgene design, assembly and optimization to enable unprecedented control over the function and output
of living cells.



Under the terms of the ECC, the Company will
receive an exclusive, worldwide license to utilize Intrexon’s proprietary technology and expertise for the standardized
design and production of genetically modified bacteriophages, which we refer to collectively as the Bacteriophage Program. The
ECC seeks to develop bacteriophage-containing human therapeutics for use in the treatment of bacterial infections associated with
acute and chronic wounds, the treatment of acute and chronic P. aeruginosa lung infections and the treatment of infections
of C. difficile, which we collectively refer to as AmpliPhi Products. The ECC grants the Company a worldwide license to
use patents and other intellectual property of Intrexon in connection with the research, development, use, importing, manufacture,
sale and offer for sale of AmpliPhi Products. Such license is exclusive with respect to any clinical development, selling, offering
for sale or other commercialization of AmpliPhi Products, and otherwise is non-exclusive. Subject to limited exceptions, we may
not sublicense the rights to Intrexon’s technology without Intrexon’s written consent.



Under the ECC, and subject to certain exceptions,
we are responsible for, among other things, the performance of the Bacteriophage Program, including development, commercialization
and certain aspects of manufacturing AmpliPhi Products. Intrexon is responsible for the costs of establishing manufacturing capabilities
and facilities, subject to certain exceptions, for the bulk manufacture of products developed under the Bacteriophage Program,
certain other aspects of manufacturing and costs of basic-stage research with respect to Intrexon Channel Technology and Intrexon
materials, i.e., platform improvements and costs of filing, prosecution and maintenance of Intrexon’s patents.



Subject to certain expense allocations and
other offsets provided in the ECC, AmpliPhi has agreed to pay Intrexon on a quarterly basis tiered royalties on net sales derived
in that quarter from the sale of AmpliPhi Products, which are based on or incorporate Intrexon’s technology, calculated
on a product-by-product basis. If AmpliPhi sublicenses a product developed under the collaboration with Intrexon, AmpliPhi has
likewise agreed to pay Intrexon on a quarterly basis a certain percentage of revenues received from the sub-licensee. Pursuant
to the ECC, Intrexon received 24,000,000 shares of our common stock as an upfront technology access fee. We may also pay Intrexon
up to $7.5 million in aggregate milestone payments for each product, payable either in cash or equity upon the achievement of
certain events. Intrexon is also entitled to tiered royalties as a percentage in the upper-single digits of the net product sales
of a product developed under the ECC.



The ECC is effective until terminated by either
Intrexon or AmpliPhi. Intrexon may terminate the ECC if AmpliPhi fails to use diligent efforts to develop and commercialize AmpliPhi
Products or if AmpliPhi elects not to pursue the development of an AmpliPhi Program identified by Intrexon that is a “Superior
Therapy” as defined in the ECC. AmpliPhi has the right to terminate the ECC upon 90 days’ written notice to Intrexon
at any time.



Upon termination of the ECC, AmpliPhi may
continue to develop and commercialize any AmpliPhi Product that, at the time of termination:



| | · | is being commercialized
                                         by the Company;
| | - | --------------------------------------------------------------------------------



16









| | · | has received regulatory
                                         approval;
| | - | --------------------------------------------------------------------------



| | · | is a subject of
                                         an application for regulatory approval that is pending before the applicable regulatory
                                         authority; or
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | is the subject
                                         of an ongoing Phase 2 or completed Phase 3 clinical trial in the field.
| | - | -------------------------------------------------------------------------------------------------------------------------------



AmpliPhi’s obligation to pay royalties
described above with respect to these “retained” products will survive termination of the ECC.



Global R&D Agreement with U.S. Army



In June 2013, we entered a CRADA with the
USAMRMC and the WRAIR. The CRADA will focus on developing bacteriophage therapeutics to treat at least three types of infections:
S. aureus, E. coli and P. aeruginosa. The increasing prevalence of antibiotic-resistant bacteria poses a
serious threat to public health and military personnel and is a major problem in hospitals and clinics around the world. The initial
indication will be wounds and skin infections from S. aureus, which is the leading pathogen in healthcare-associated infections
in the United States as a whole, accounting for 30.4% of surgical site infections.



In connection with our CRADA with the U.S.
Army, we submitted a Pre-IND briefing package to the FDA to obtain their feedback on our Chemistry, Manufacturing and Controls
(CMC) program and plans for our first human study with our lead product, AmpliPhage-002 ( S. aureus ). The FDA endorsed
our plan for progressing bacteriophage therapy to the clinic, specifically agreeing to our platform’s manufacturing process,
product specifications and the absence of any need of non-clinical toxicology to initiate our first Phase 1 study.



We plan to conduct our Phase 1 study at the
WRAIR and to conduct further clinical trials at various sites throughout the world. We plan to initiate a Phase 1 feasibility
and safety study in phage treatment of S. aureus infections in the first half of 2015. Upon successful completion of this
study we plan to conduct a Phase 2 study of AmpliPhage-002 in patients with S. aureus infections.



We will retain global regulatory ownership
and commercial rights to all products developed by us under the agreement. USAMRMC will gain access rights to any products developed.
We also have the rights to exclusively license any intellectual property developed by USAMRMC under the collaboration on terms
to be agreed upon.



The CRADA expires in June 2018 and can be
terminated by either USAMRMC or AmpliPhi upon 60 days’ written notice to the other party at any time.



University of Leicester Development Agreements



On April 24, 2013, we entered into the April
Collaboration Agreement and on September 5, 2013, we entered into the “Leicester License Agreement” with the University
of Leicester to develop a phage therapy that targets and kills all toxin types of C. difficile. We also entered into the
August Collaboration Agreement with the University of Leicester and the University of Glasgow, whereby the University of Glasgow
will carry out certain animal model development work.



Under these agreements, which we refer to
collectively as the Leicester Development Agreements, we are funding the University of Leicester to carry out in vitro
and the University of Glasgow to carry out animal model development work on the University of Leicester’s development of
a bacteriophage therapeutic to resolve C. difficile infections and we are licensing related patents, materials and know-how
from the University of Leicester. Under the Leicester Development Agreements, the University of Leicester will provide the bacteriophage
and act as overall project coordinator for the development work. All rights, title and interest to any intellectual property developed
under the Leicester Development Agreements belong to us. Under the Leicester License Agreement, we have exclusive rights to certain
background intellectual property of the University of Leicester, for which we will pay the University of Leicester royalties based
on product sales and make certain milestone payments based on product development.



17









The April Collaboration Agreement expires
on November 12, 2014 and is terminable by either party upon (a) material breach by the other party, subject to a 90-day cure period,
(b) the inability of the principal investigator to continue the collaboration or (c) our bankruptcy or winding up of our operations.



The August Collaboration Agreement expires
on October 22, 2014 and is terminable under the same conditions as the April Collaboration Agreement.



The license agreement expires on the later
of the expiration of the licensed patents or September 5, 2028, and is terminable by us at any time upon 60 days’ notice,
by the University of Leicester (a) if we legally challenge the validity or ownership of any of the licensed patents, (b) if we
fail to pay the fees, milestones or royalties due under the license agreement or (c) if we fail to make substantial commercial
process and agree with Leicester that we will be unable to do so. The license agreement is also terminable by either party upon
the material breach by the other party (subject to a 30-day cure period) or upon the other party’s bankruptcy or insolvency.



Legacy Programs



Sale of Assets to Celladon Corporation



On June 27, 2012, we entered into an
asset purchase agreement and amended and restated license agreement, or license agreement, with Celladon Corporation, or
Celladon, where we sold and transferred all of our rights and interest in our gene therapy business, subject to certain
limitations relating to rights contained in our license agreements with the University of Pennsylvania and Genzyme
Corporation. Pursuant to our license agreement with the University of Pennsylvania, or UPenn, we may be obligated to make
certain royalty and license payments to UPenn as a result of Celladon’s (or its affiliate’s or licensee’s)
use of certain technology licensed under our license agreement with Celladon. Pursuant to the license agreement with
Celladon, Celladon has agreed to comply with certain terms of the UPenn license agreement and to reimburse us for any
payments that come due under the UPenn license agreement. In May 2013, we received sublicense maintenance fees from Celladon
in the amount of $0.31 million. Celladon’s obligation to pay us these sublicense maintenance fees continues until the earlier of
Celladon’s termination of the agreement (which it may elect to do at any time upon thirty days’ notice to us) or
expiration of the patents related to the licensed technology.



Intellectual Property



General



Our goal is to obtain, maintain and enforce
patent protection for our product candidates, formulations, processes, methods and any other proprietary technologies, preserve
our trade secrets and operate without infringing on the proprietary rights of other parties, both in the United States and in
other countries. Our policy is to actively seek to obtain, where appropriate, the broadest intellectual property protection possible
for our current product candidates and any future product candidates, proprietary information and proprietary technology through
a combination of contractual arrangements and patents, both in the United States and abroad. However, patent protection may not
afford us with complete protection against competitors who seek to circumvent our patents.







18











We also depend upon the skills, knowledge,
experience and know-how of our management and research and development personnel, as well as that of our advisors, consultants
and other contractors. To help protect our proprietary know-how, which is not patentable, and for inventions for which patents
may be difficult to enforce, we currently and will in the future rely on trade secret protection and confidentiality agreements
to protect our interests. To this end, we require all of our employees, consultants, advisors and other contractors to enter into
confidentiality agreements that prohibit the disclosure of confidential information and, where applicable, require disclosure
and assignment to us of the ideas, developments, discoveries and inventions important to our business.



We hold or have exclusive license rights to
five U.S. patents (and corresponding foreign patents), expiring on various dates between 2024 and 2029. These patents relate to
the therapeutic uses of bacteriophages, bacteriophage compositions, the sequential use of bacteriophages in combination with conventional
antibiotics, genetic sequence variations, biofilm disrupting agents, methods to reduce antibiotic resistance, and methods to design
therapeutic combination panels of bacteriophage.



US 7758856 and national patents within the EU deriving from
PCT WO2004062677; Bacteriophage for the treatment of bacterial biofilms



Under an existing license from the United
Kingdom Secretary of State for the Department of Health (DoH), we have exclusive rights to develop and exploit technologies relating
to the use of bacteriophages combined with biofilm-disrupting agents in treating biofilm infections. The patent specifies agents
able to facilitate the penetration of biofilms, and their combination with therapeutic bacteriophage preparations. The priority
date for these patents is January 10, 2003 and the date of U.S. grant is July 20, 2010. The date of expiry is December 5, 2026
in the United States (noting Patent Term Adjustment, PTA, by the United States Patent and Trademark Office, or USPTO). The patent
is also granted in the European Union (France, Germany, Netherlands, Switzerland/Liechtenstein and the United Kingdom). The date
of expiry is January 12, 2024 in the European Union. Pursuant to this license agreement, we may be required to pay the United
Kingdom DoH aggregate milestone payments of up to £10,000 per product and single-digit royalties. The agreement, which may
be terminated by the DoH upon our default, continues until the earlier of such termination or the expiry of the DoH’s rights
in the licensed intellectual property.



US 7807149, US 8105579, US 8388946, continuation application
and national filings deriving from PCT WO2005009451; Bacteriophage containing therapeutic agents



Through our wholly owned subsidiary, Biocontrol
Ltd, we have three granted U.S. patents and a pending continuation application filed. The granted patents relate to therapeutic,
sequential use of bacteriophages in combination with conventional antibiotics, to bacteriophage compositions, and to the uses
of bacteriophages. The filed continuation application relates to genetic sequence variation around the protected agents. The priority
dates for these patents is July 23, 2003. Dates of U.S. grant are October 5, 2010, January 31, 2012 and March 5, 2013. The dates
of expiry for the granted patents are March 18, 2027 (noting PTA by the USPTO), July 23, 2024 and July 23, 2024 in the United
States. The national application in Australia was granted as AU 2004258731 on June 10, 2010, with July 23, 2024 as the date of
expiry. Examination in other jurisdictions is proceeding: for example, in the EU, claims for bacteriophage compositions are approaching
allowance; and a divisional application has been submitted for therapy claims although there is no assurance that claims or applications
will ultimately be granted.



US 8475787, continuation application and national filings
deriving from PCT WO2008110840; Beneficial effects of bacteriophage treatment



Through our wholly owned subsidiary, Biocontrol
Ltd, we have one granted U.S. patent, and a pending continuation application filed. The granted patent relates to bacteriophage-induced
induction of antibiotic sensitivity for P. aeruginosa. The priority date for these patents is March 9, 2007. The date of
U.S. grant is July 2, 2013 and the date of expiry for the granted patent is March 21, 2029 (noting PTA by the USPTO). The continuation
application has been filed relating to other bacterial species. The national application in Australia was granted as AU 2008224651
on December 19, 2013, with March 7, 2028 as the date of expiry. National applications are under examination in other jurisdictions.



PCT WO2013/16464 (United Kingdom priority filing 1207910.9);
Therapeutic bacteriophage compositions



Through our wholly owned subsidiary, Biocontrol
Ltd, we have a PCT application relating to the design of effective combinations of bacteriophages. The priority date for this
application is May 4, 2012. The PCT application published on November 7, 2013.



19









Our success in preserving market exclusivity
for our product candidates relies on patent protection, including extensions to this where appropriate, and on data exclusivity
relating to an approved biologic. This may be extended by orphan drug and/or pediatric use protection where appropriate. Once
any regulatory period of data exclusivity expires, depending on the status of our patent coverage, we may not be able to prevent
others from marketing and selling biosimilar versions of our product candidates. We are also dependent upon the diligence of our
appointed agents in national jurisdictions, acting for and on behalf of the Company, which manage the prosecution of pending domestic
and foreign patent applications and maintain granted domestic and foreign patents.



Competition



We operate in highly competitive segments
of the biotechnology and biopharmaceutical markets. We face competition from many different sources, including commercial pharmaceutical
and biotechnology enterprises, academic institutions, government agencies and private and public research institutions all seeking
to develop novel treatment modalities for bacterial disease. Many of our competitors have significantly greater financial, product
development, manufacturing and marketing resources than we do. Large pharmaceutical companies have extensive experience in clinical
testing and obtaining regulatory approval for drugs. In addition, many universities and private and public research institutes
are active in antibacterial research, some in direct competition with us. We also may compete with these organizations to recruit
scientists and clinical development personnel. Smaller or early-stage companies may also prove to be significant competitors,
particularly through collaborative arrangements with large and established companies.



Manufacturing and Supply



The manufacturing process for our bacteriophage
product is currently under development. We are optimizing a manufacturing platform that will allow us to prepare therapeutic phages
to cGMP regulations, in a cost-effective manner. We have developed our own manufacturing capabilities at a wholly owned facility
in Ljubljana, Slovenia. Our facility must comply with applicable cGMP regulations, which require, among other things, quality
control and quality assurance as well as the corresponding maintenance of records and documentation. Pharmaceutical product manufacturers
and other entities involved in the manufacture and distribution of approved pharmaceutical products are required to register their
establishments with the FDA, and certain state agencies, including the applicable government agency where the facility is located,
and are subject to periodic unannounced inspections by the FDA and certain state agencies for compliance with cGMP and other laws.
Our facility in Ljubljana Slovenia is subject to inspection and regulation by JAZMP, the Slovenian agency that regulates and supervises
pharmaceutical products in Slovenia. As a result of an initial inspection, we are taking certain corrective actions regarding
the manufacture of AmpliPhage-002, which we believe will lead to certification by JAZMP to manufacture AmpliPhage-002; however,
there can be no assurance that we will receive such certification. Accordingly, we must continue to expend time, money and effort
in the areas of production and quality control to maintain cGMP compliance. Discovery of problems with a product after approval
may result in restrictions on a product, manufacturer or holder of an approved NDA/Biologics License Application, or BLA, including
withdrawal of the product from the market. In addition, changes to the manufacturing process generally require prior regulatory
approval before being implemented and other types of changes to the approved product, such as adding new indications and additional
labeling claims, are also subject to further regulatory review and approval, including approval by the FDA.



Commercialization and Marketing



We have full worldwide commercial rights to
all of our phage-based products to treat drug-resistant bacterial infections, including our lead programs: AmpliPhage-001 for
the treatment of CF patients with P. aeruginosa lung infections; AmpliPhage-002, for the treatment of antibiotic-resistant
S. aureus (MRSA) infections; and AmpliPhage-004 for the treatment of C. difficile infections. We believe we can
maximize the value of our company by retaining substantial global commercialization rights to these product candidates and, where
appropriate, entering into partnerships to develop and commercialize our other product candidates. We plan to build a successful
commercial enterprise using a sales team in the United States and possibly other major markets and with partners in other territories.



20







We have not yet established a sales, marketing
or product distribution infrastructure because our lead candidates are still in early clinical development. We generally expect
to retain commercialization and co-commercialization rights in the United States for all of our product candidates for which we
receive marketing approvals. Subject to receiving marketing approvals, we intend to explore building the necessary marketing and
sales infrastructure to market and sell our current product candidates. We also intend to explore the use of a variety of distribution
agreements and commercial partnerships in those territories where we do not establish a sales force for any of our product candidates
that obtain marketing approval.



Government Regulation and Product Approval



Government authorities in the United States,
at the federal, state and local level, and other countries extensively regulate, among other things, the research, development,
testing, manufacture, quality control, approval, labeling, packaging, storage, record-keeping, promotion, advertising, distribution,
post-approval monitoring and reporting, marketing and export and import of products such as those we are developing.



United States Product Development Process



In the United States, the FDA regulates biological
products under the Federal Food, Drug and Cosmetic Act, or FDCA, and the Public Health Service Act, or the PHS Act, and related
regulations. Biological products are also subject to other federal, state and local statutes and regulations. The process of obtaining
regulatory approvals and the subsequent compliance with appropriate federal, state, local and foreign statutes and regulations
require the expenditure of substantial time and financial resources. Failure to comply with the applicable United States requirements
at any time during the product development process or approval process, or after approval, may subject an applicant to administrative
or judicial sanctions. FDA sanctions could include refusal to approve pending applications, withdrawal of an approval, a clinical
hold, warning letters, product recalls, product seizures, total or partial suspension of production or distribution injunctions,
fines, refusals of government contracts, restitution, disgorgement or civil or criminal penalties. Any agency or judicial enforcement
action could have a material adverse effect on us. The process required by the FDA before a biological product may be marketed
in the United States generally includes the following:



| | · | completion of preclinical laboratory tests, animal studies and formulation
    studies according to good laboratory practice requirements, or GLP, or other applicable regulations;
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | submission to the FDA of an IND, which must become effective before human clinical trials
    may begin in the United States;
| | - | -----------------------------------------------------------------------------------------------------------------------------



| | · | performance of adequate and well-controlled human clinical trials according to the FDA’s
    regulations commonly referred to as good clinical practices, or GCPs, and any additional requirements for the protection of
    human research subjects and their health information, to establish the safety and efficacy of the proposed biological product
    for its intended use or uses;
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | submission to the FDA of a Biologics License Application (BLA) for a new biological product;
| | - | --------------------------------------------------------------------------------------------



| | · | satisfactory completion of an FDA inspection of the manufacturing facility or facilities
    where the biological product is produced to assess compliance with the FDA’s cGMP regulations, to assure that the facilities,
    methods and controls are adequate to preserve the biological product’s identity, strength, quality and purity;
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | potential FDA audit of the nonclinical study sites and clinical trial sites that generated
    the data in support of the BLA; and
| | - | ----------------------------------------------------------------------------------------------------------------------------------



| | · | FDA review and approval, or licensure, of the BLA which must occur before a biological product
    can be marketed or sold.
| | - | ---------------------------------------------------------------------------------------------------------------------------



The lengthy process of seeking required approvals
and the continuing need for compliance with applicable statutes and regulations require the expenditure of substantial resources
even when approvals are inherently uncertain.



21







The strategies, nature, and technologies of
bacteriophage products are different from the conventional antibiotic therapy products. From the regulatory requirements established
to ensure the safety, efficacy and quality of bacteriophage preparations, there are several major points to consider during the
development, manufacturing, characterization, preclinical study and clinical study of bacteriophage. The major issues include:



| | · | bacteriophage preparation design (single agent versus phage mixes and wild-type phage versus
    genetically engineered phage);
| | - | -------------------------------------------------------------------------------------------------------------------------------



| | · | proof of concept in development of bacteriophage products;
| | - | ----------------------------------------------------------



| | · | selectivity of bacteriophage replication and targeting to specific species of bacteria;
| | - | ---------------------------------------------------------------------------------------



| | · | relevant animal models in preclinical studies; and
| | - | --------------------------------------------------



| | · | clinical safety.
| | - | ----------------



Before testing any compounds with potential
therapeutic value in humans, the biological product candidate enters the preclinical testing stage. Preclinical tests include
laboratory evaluations of product biology, toxicity and formulation, as well as animal studies to assess the potential safety
and activity of the biological product candidate. The conduct of the preclinical tests must comply with federal regulations and
requirements including GLP. The sponsor must submit the results of the preclinical tests, together with manufacturing information,
analytical data, any available clinical data or literature and a proposed clinical protocol, to the FDA as part of the IND application.
The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA places the IND on a clinical hold within
that 30-day time period. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical
trial can begin. The FDA may also impose clinical holds on a biological product candidate at any time before or during clinical
trials due to safety concerns or non-compliance. Accordingly, we cannot be certain that submission of an IND will result in the
FDA allowing clinical trials to begin, or that, once begun, issues will not arise that suspend or terminate such clinical trial.



Clinical trials involve the administration
of the biological product candidate to healthy volunteers or patients under the supervision of qualified investigators, generally
physicians not employed by the sponsor. Clinical trials are conducted under protocols detailing, among other things, the objectives
of the clinical trial, dosing procedures, subject inclusion and exclusion criteria and the parameters to be used to monitor subject
safety. Each protocol must be submitted to the FDA if conducted under an IND. Clinical trials must be conducted in accordance
with GCP requirements. Further, each clinical trial must be reviewed and approved by an independent institutional review board,
or IRB, or ethics committee if conducted outside of the U.S., at or servicing each institution at which the clinical trial will
be conducted. An IRB or ethics committee is charged with protecting the welfare and rights of trial participants and considers
such items as whether the risks to individuals participating in the clinical trials are minimized and are reasonable in relation
to anticipated benefits. The IRB or ethics committee also approves the informed consent form that must be provided to each clinical
trial subject or his or her legal representative and must monitor the clinical trial until completed. We intend to use third-party
CROs to administer and conduct our planned clinical trials and will rely upon such CROs, as well as medical institutions, clinical
investigators and consultants, to conduct our trials in accordance with our clinical protocols and to play a significant role
in the subsequent collection and analysis of data from these trials. The failure by any of such third parties to meet expected
timelines, adhere to our protocols or meet regulatory standards could adversely impact the subject product development program
and we remain legally responsible for compliance with applicable laws and regulations governing the conduct of these clinical
trials.



Human clinical trials are typically conducted
in three sequential phases that may overlap or be combined:



| | · | Phase 1: The biological product is initially introduced into healthy human subjects and
    tested primarily for safety and dosage tolerance. Absorption, metabolism, distribution and excretion may also be tested.
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | Phase 2: The biological product is evaluated in a limited patient population to identify
    possible adverse effects and safety risks, to preliminarily evaluate the efficacy of the product for specific targeted diseases
    and to determine dosage tolerance, optimal dosage and dosing schedule.
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



22







| | · | Phase 3: Clinical trials are undertaken to further evaluate dosage, clinical efficacy and
    safety in an expanded patient population at geographically dispersed clinical trial sites. These clinical trials are intended
    to establish the overall risk/benefit ratio of the product and provide an adequate basis for product labeling. Generally,
    two adequate and well-controlled Phase 3 clinical trials are required by the FDA and other regulatory authorities for approval
    of a marketing application.
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Post-approval studies, or Phase 4 clinical
trials, may be requested by the FDA as a condition of approval and are conducted after initial marketing approval. These studies
are used to gain additional experience from the treatment of patients in the intended therapeutic indication.



Progress reports detailing the results of
the clinical trials must be submitted at least annually to the FDA and written IND safety reports must be submitted to the FDA
and the investigators for serious and unexpected adverse events or any finding from tests in laboratory animals that suggests
that there may be a significant risk for human subjects. The FDA or the sponsor or, if used, its data safety monitoring board
may suspend a clinical trial at any time on various grounds, including a finding that the research subjects or patients are being
exposed to an unacceptable health risk. Similarly, an IRB or ethics committee can suspend or terminate approval of a clinical
trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s or ethics committee’s
requirements or if the pharmaceutical product has been associated with unexpected serious harm to patients. Suspension of a clinical
study due to safety risks attributed to the investigational product will result in termination of the study and possibly others
that are underway.



Concurrent with clinical trials, companies
usually complete additional animal studies and must also develop additional information about the physical characteristics of
the biological product as well as finalize a process for manufacturing the product in commercial quantities in accordance with
cGMP requirements. To help reduce the risk of the introduction of adventitious agents or other impurities with the use of biological
products, the PHS Act emphasizes the importance of manufacturing control for products whose attributes cannot be precisely defined.
The manufacturing process must be capable of consistently producing quality batches of the product candidate and, among other
things, the sponsor must develop methods for testing the identity, strength, quality, potency, and purity of the final biological
product. Additionally, appropriate packaging must be selected and tested and stability studies must be conducted to demonstrate
that the biological product candidate does not undergo unacceptable deterioration over its shelf life.



United States Review and Approval Processes



In order to obtain approval to market a biological
product in the United States, a BLA must be submitted to the FDA that provides data establishing to the FDA’s satisfaction
the safety and effectiveness of the investigational biological product for the proposed indication. The application includes all
data available from nonclinical studies and clinical trials, including negative or ambiguous results as well as positive findings,
together with detailed information relating to the product’s manufacture and composition, and proposed labeling, among other
things. The testing and approval processes require substantial time and effort and there can be no assurance that the FDA will
accept the BLA for filing and, even if filed, that any approval will be granted on a timely basis, if at all.



Under the Prescription Drug User Fee Act,
or PDUFA, as amended, each BLA must be accompanied by a user fee. The FDA adjusts the PDUFA user fees on an annual basis. According
to the FDA’s fee schedule, effective through September 30, 2014, the user fee for an application requiring clinical data,
such that the biological product candidate does not undergo unacceptable deterioration over its shelf life as a BLA, is $2,169,100.
PDUFA also imposes an annual product fee for biologics ($104,060), and an annual establishment fee ($554,600) on facilities used
to manufacture prescription biologics. Fee waivers or reductions are available in certain circumstances, including a waiver of
the application fee for the first application filed by a small business. Additionally, no user fees are assessed on BLAs for products
designated as orphan drugs, unless the product also includes a non-orphan indication.



23







The FDA has 60 days from its receipt of a
BLA to determine whether the application will be accepted for filing based on the agency’s threshold determination that
the application is sufficiently complete to permit substantive review. The FDA may refuse to file any BLA that it deems incomplete
or not properly reviewable at the time of submission and may request additional information. In this event, the BLA must be resubmitted
with the additional information. The resubmitted application also is subject to review before the FDA accepts it for filing. After
the BLA submission is accepted for filing, the FDA reviews the BLA to determine, among other things, whether the proposed product
is safe and effective for its intended use, has an acceptable purity profile, and whether the product is being manufactured in
accordance with GMP regulations to assure and preserve the product’s identity, safety, strength, quality, potency, and purity.
The FDA may refer applications for novel biological products or biological products that present difficult questions of safety
or efficacy to an advisory committee, typically a panel that includes clinicians and other experts, for review, evaluation and
a recommendation as to whether the application should be approved and, if so, under what conditions. The FDA is not bound by the
recommendations of an advisory committee, but it considers such recommendations carefully when making decisions. The FDA may ultimately
decide that the NDA/BLA does not satisfy the criteria for approval. If a product receives regulatory approval, the approval may
be significantly limited to specific diseases and dosages or the indications for use may otherwise be limited, which could restrict
the commercial value of the product. Further, the FDA may require that certain contraindications, warnings or precautions be included
in the product labeling.



Special FDA Expedited Review and Approval Programs



The FDA has various programs, including fast
track designation, accelerated approval and priority review, that are intended to expedite the process for the development and
FDA review of drugs that are intended for the treatment of serious or life threatening diseases or conditions and demonstrate
the potential to address unmet medical needs. The purpose of these programs is to provide important new drugs and biological products
to patients earlier than under standard FDA review procedures.



To be eligible for a fast track designation,
the FDA must determine, based on the request of a sponsor, that a product is intended to treat a serious or life threatening disease
or condition and demonstrates the potential to address an unmet medical need, or if the drug or biological product qualifies as
a qualified infectious disease product under the recently enacted Generating Antibiotic Incentives Now, or GAIN Act. The FDA will
determine that a product will fill an unmet medical need if it will provide a therapy where none exists or provide a therapy that
may be potentially superior to existing therapy based on efficacy or safety factors. We intend to request fast track designation
for our product candidates if applicable.



Specifically, new drugs and biological products
are eligible for Fast Track designation if they are intended to treat a serious or life-threatening condition and demonstrate
the potential to address unmet medical needs for the condition. Fast Track designation applies to the combination of the product
and the specific indication for which it is being studied. The sponsor of a new drug or biological may request the FDA to designate
the drug or biologic as a Fast Track product at any time during the clinical development of the product. Unique to a Fast Track
product, the FDA may consider for review sections of the marketing application on a rolling basis before the complete application
is submitted, if the sponsor provides a schedule for the submission of the sections of the application, the FDA agrees to accept
sections of the application and determines that the schedule is acceptable, and the sponsor pays any required user fees upon submission
of the first section of the application.



Any product submitted to the FDA for marketing,
including under a Fast Track program, may be eligible for other types of FDA programs intended to expedite development and review,
such as priority review and accelerated approval. Any product is eligible for priority review if it has the potential to provide
safe and effective therapy where no satisfactory alternative therapy exists or a significant improvement in the treatment, diagnosis
or prevention of a disease compared to marketed products. The FDA will attempt to direct additional resources to the evaluation
of an application for a new drug or biological product designated for priority review in an effort to facilitate the review. Additionally,
a product may be eligible for accelerated approval. Drug or biological products studied for their safety and effectiveness in
treating serious or life-threatening illnesses and that provide meaningful therapeutic benefit over existing treatments may receive
accelerated approval, which means that they may be approved on the basis of adequate and well-controlled clinical studies establishing
that the product has an effect on a surrogate endpoint that is reasonably likely to predict a clinical benefit, or on the basis
of an effect on a clinical endpoint other than survival or irreversible morbidity or mortality, that is reasonably likely to predict
an effect on irreversible morbidity or mortality or other clinical benefit, taking into account the severity, rarity or prevalence
of the condition and the availability or lack of alternative treatments.



24







As a condition of approval, the FDA may require
a sponsor of a drug or biological product receiving accelerated approval perform post-marketing studies to verify and describe
the predicted effect on irreversible morbidity or mortality or other clinical endpoint, and the drug or biological product may
be subject to accelerated withdrawal procedures. In addition, the FDA currently requires as a condition for accelerated approval
pre-approval of promotional materials, which could adversely impact the timing of the commercial launch of the product. Fast Track
designation, priority review and accelerated approval do not change the standards for approval but may expedite the development
or approval process.



Moreover, under the provisions of the new
Food and Drug Administration Safety and Innovation Act, or FDASIA, enacted in 2012, a sponsor can request designation of a product
candidate as a “breakthrough therapy.” A breakthrough therapy is defined as a drug or biological product that is intended,
alone or in combination with one or more other drugs or biological products, to treat a serious or life-threatening disease or
condition, and preliminary clinical evidence indicates that the biological product or drug may demonstrate substantial improvement
over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early
in clinical development. Drugs or biological products designated as breakthrough therapies are also eligible for accelerated approval.
The FDA must take certain actions, such as holding timely meetings and providing advice, intended to expedite the development
and review of an application for approval of a breakthrough therapy. We intend to request “breakthrough therapy” designation
for our product candidates if applicable.



Even if a product qualifies for one or more
of these programs, the FDA may later decide that the product no longer meets the conditions for qualification or decide that the
time period for FDA review or approval will not be shortened.



Drug Price Competition and Patent Term Restoration Act of
1984



Under the Drug Price Competition and Patent
Term Restoration Act of 1984, known as the Hatch-Waxman Amendments, a portion of a product’s patent term that was lost during
clinical development and application review by the FDA may be restored. The Hatch-Waxman Amendments also provide for a statutory
protection, known as non-patent market exclusivity, against the FDA’s acceptance or approval of certain competitor applications.



Patent term restoration can compensate for
time lost during product development and the regulatory review process by returning up to five years of patent life for a patent
that covers a new product or its use. This period is generally one-half the time between the effective date of an IND (falling
after issuance of the patent) and the submission date of an NDA, plus the time between the submission date of a BLA and the approval
of that application. Patent term restorations, however, cannot extend the remaining term of a patent beyond a total of 14 years.
The application for patent term extension is subject to approval by the United States Patent and Trademark Office in conjunction
with the FDA. It takes at least six months to obtain approval of the application for patent term extension. Up to five years of
interim one-year extensions are available if a product is still undergoing development or FDA review at the time of the expiration.



A patent term extension is only available
when the FDA approves a biological product for the first time. However, we cannot be certain that the PTO and the FDA will agree
with our analysis or will grant a patent term extension.



A biological product can obtain pediatric
market exclusivity in the United States. Pediatric exclusivity, if granted, adds six months to existing exclusivity periods and
patent terms. This six-month exclusivity, which runs from the end of other exclusivity protection or patent term, may be granted
based on the voluntary completion of a pediatric study in accordance with an FDA-issued “Written Request” for such
a study.



25







An abbreviated approval pathway for biological
products shown to be similar to, or interchangeable with, an FDA-licensed reference biological product was created by the Biologics
Price Competition and Innovation Act of 2009, which was part of the Patient Protection and Affordable Care Act, or PPACA, signed
into law on March 23, 2010. This amendment to the PHS Act attempts to minimize duplicative testing. Biosimilarity, which requires
that there be no clinically meaningful differences between the biological product and the reference product in terms of safety,
purity, and potency, can be shown through analytical studies, animal studies, and a clinical study or studies. Interchangeability
requires that a biological product is biosimilar to the reference biological product and the product must demonstrate that it
can be expected to produce the same clinical results as the reference product and, for products administered multiple times, the
product and the reference product may be switched after one has been previously administered without increasing safety risks or
risks of diminished efficacy relative to exclusive use of the reference biological product. However, complexities associated with
the larger, and often more complex, structure of biological products, as well as the process by which such products are manufactured,
pose significant hurdles to implementation that are still being worked out by the FDA.



A reference biological product is granted
twelve years of exclusivity from the time of first licensure of the reference product. On April 10, 2013, President Obama released
his proposed budget for fiscal year 2014 and proposed to cut this twelve year period of exclusivity down to seven years. He also
proposed to prohibit additional periods of exclusivity for brand biological products due to minor changes in product formulation,
a practice often referred to as “evergreening.” The first biological product submitted under the abbreviated approval
pathway that is determined to be interchangeable with the reference product has exclusivity against other biologics submitting
under the abbreviated approval pathway for the lesser of (i) one year after the first commercial marketing, (ii) 18 months after
approval if there is no legal challenge, (iii) 18 months after the resolution in the applicant’s favor of a lawsuit challenging
the biologic’s patents if an application has been submitted, or (iv) 42 months after the application has been approved if
a lawsuit is ongoing within the 42-month period.



FDA Post-Approval Requirements



Maintaining substantial compliance with applicable
federal, state, local, and foreign statutes and regulations requires the expenditure of substantial time and financial resources.
Rigorous and extensive FDA regulation of biological products continues after approval, particularly with respect to GMP. We will
rely, and expect to continue to rely, on third parties for the production of clinical and commercial quantities of any products
that we may commercialize. Manufacturers of our products are required to comply with applicable requirements in the GMP regulations,
including quality control and quality assurance and maintenance of records and documentation. We cannot be certain that we or
our present or future suppliers will be able to comply with the GMP and other FDA regulatory requirements. Other post-approval
requirements applicable to biological products include reporting of GMP deviations that may affect the identity, potency, purity
and overall safety of a distributed product, record-keeping requirements, reporting of adverse effects, reporting updated safety
and efficacy information, and complying with electronic record and signature requirements. After a BLA is approved, the product
also may be subject to official lot release. As part of the manufacturing process, the manufacturer is required to perform certain
tests on each lot of the product before it is released for distribution. If the product is subject to official release by the
FDA, the manufacturer submits samples of each lot of product to the FDA together with a release protocol showing a summary of
the history of manufacture of the lot and the results of all of the manufacturer’s tests performed on the lot. The FDA also
may perform certain confirmatory tests on lots of some products, such as viral vaccines, before releasing the lots for distribution
by the manufacturer. In addition, the FDA conducts laboratory research related to the regulatory standards on the safety, purity,
potency, and effectiveness of biological products.



Discovery of previously unknown problems or
the failure to comply with the applicable regulatory requirements, by us or our suppliers, may result in restrictions on the marketing
of a product or withdrawal of the product from the market as well as possible civil or criminal sanctions and adverse publicity.
FDA sanctions could include refusal to approve pending applications, withdrawal of an approval, clinical hold, warning or untitled
letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals
of government contracts, mandated corrective advertising or communications with doctors, debarment, restitution, disgorgement
of profits, or civil or criminal penalties. Any agency or judicial enforcement action could have a material adverse effect on
us.



Biological product manufacturers and other
entities involved in the manufacture and distribution of approved biological products are required to register their facilities
with the FDA and certain state agencies, and are subject to periodic unannounced inspections by the FDA and certain state agencies
for compliance with GMPs and other laws. In addition, changes to the manufacturing process or facility generally require prior
FDA approval before being implemented and other types of changes to the approved product, such as adding new indications and additional
labeling claims, are also subject to further FDA review and approval.



26







Labeling, Marketing and Promotion



The FDA closely regulates the labeling, marketing
and promotion of biological products, including direct-to-consumer advertising, promotional activities involving the internet,
and industry-sponsored scientific and educational activities. While doctors are free to prescribe any product approved by the
FDA for any use, a company can only make claims relating to safety and efficacy of a biological product that are consistent with
FDA approval, and the company is allowed to actively market a biological product only for the particular use and treatment approved
by the FDA. In addition, any claims we make for our products in advertising or promotion must be appropriately balanced with important
safety information and otherwise be adequately substantiated. Failure to comply with these requirements can result in adverse
publicity, warning letters, corrective advertising, injunctions and potential civil and criminal penalties.



Other Healthcare Laws and Compliance Requirements



In the United States, our activities are potentially
subject to regulation by various federal, state and local authorities in addition to the FDA, including the Centers for Medicare
and Medicaid Services (formerly the Health Care Financing Administration), other divisions of the United States Department of
Health and Human Services (e.g., the Office of Inspector General), the United States Department of Justice and individual United
States Attorney offices within the Department of Justice and state and local governments.



International Regulation



In addition to regulations in the United States,
we will be subject to a variety of foreign regulations governing clinical trials and commercial sales and distribution of our
future products. Our manufacturing facility in Ljubljana, Slovenia is subject to inspection and regulation by JAZMP, the Slovenian
agency that regulates and supervises pharmaceutical products in Slovenia. Whether or not we obtain FDA approval for a product,
we must obtain approval of a product by the comparable regulatory authorities of foreign countries before we can commence clinical
trials or marketing of the product in those countries. The approval process varies from country to country, and the time may be
longer or shorter than that required for FDA approval. The requirements governing the conduct of clinical trials, product licensing,
pricing and reimbursement vary greatly from country to country.



Under European Union regulatory systems, marketing
authorizations may be submitted either under a centralized or a mutual recognition procedure. The centralized procedure provides
for the grant of a single marketing authorization that is valid for all European Union member states. The mutual recognition procedure
provides for mutual recognition of national approval decisions. Under this procedure, the holder of a national marketing authorization
may submit an application to the remaining member states. Within 90 days of receiving the applications and assessment report,
each member state must decide whether to recognize approval.



Pricing and Reimbursement



Although none of our product candidates has
been commercialized for any indication, if they are approved for marketing, commercial success of our product candidates will
depend, in part, upon the availability of coverage and reimbursement from third-party payors at the federal, state and private
levels. Government payor programs, including Medicare and Medicaid, private healthcare insurance companies and managed-care plans
have attempted to control costs by limiting coverage and the amount of reimbursement for particular drug treatments. The U.S.
Congress and state legislatures from time to time propose and adopt initiatives aimed at cost-containment. Ongoing federal and
state government initiatives directed at lowering the total cost of healthcare will likely continue to focus on healthcare reform,
the cost of prescription drugs and biological products and on the reform of the Medicare and Medicaid payment systems. Examples
of how limits on drug coverage and reimbursement in the United States may cause reduced payments for drugs in the future include:



| | · | changing Medicare reimbursement methodologies;
| | - | ----------------------------------------------



| | · | fluctuating decisions on which drugs to include in formularies;
| | - | ---------------------------------------------------------------



| | · | revising drug rebate calculations under the Medicaid program; and
| | - | -----------------------------------------------------------------



27







| | · | reforming drug importation laws.
| | - | --------------------------------



Indeed, the Patient Protection and Affordable
Care Act, as amended by the Health Care and Education Reconciliation Act of 2010, or collectively, the Healthcare Reform Act,
which was signed into law in March of 2010, substantially changes the way healthcare is financed by both governmental and private
insurers, and significantly impacts drugs and biological products manufacturers. The Healthcare Reform Act includes, among other
things, the following measures:



| | · | annual, non-deductible fees on any entity that manufactures or imports certain prescription
    drugs;
| | - | ------------------------------------------------------------------------------------------------------



| | · | increases in Medicaid rebates owed by manufacturers under the Medicaid Drug Rebate Program
    for both branded and generic drugs;
| | - | ----------------------------------------------------------------------------------------------------------------------------------



| | · | a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in and
    conduct comparative clinical effectiveness research;
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------



| | · | new requirements for manufacturers to discount drug prices to eligible patients by 50 percent
    at the pharmacy level and for mail order services in order for their outpatient drugs to be covered under Medicare Part D;
    and
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | an increase in the number of entities eligible for discounts under the Public Health Service
    pharmaceutical pricing program.
| | - | --------------------------------------------------------------------------------------------------------------------------------



Additionally, some third-party payors also
require pre-approval of coverage for new or innovative drug therapies before they will reimburse healthcare providers who use
such therapies. While we cannot predict whether any proposed cost-containment measures will be adopted or otherwise implemented
in the future, the announcement or adoption of these proposals could have a material adverse effect on our ability to obtain adequate
prices for our product candidates and operate profitably.



In the United States and markets in other
countries, sales of any products for which we receive regulatory approval for commercial sale will depend in part on the availability
of reimbursement from third-party payors, including government health administrative authorities, managed care providers, private
health insurers and other organizations. Third-party payors are increasingly examining the medical necessity and cost-effectiveness
of medical products and services, in addition to their safety and efficacy, and, accordingly, significant uncertainty exists as
to the reimbursement status of newly approved therapeutics. Adequate third-party reimbursement may not be available for our products
to enable us realize an appropriate return on our investment in research and product development.



Employees



As of March 24, 2014, we had nine full-time
employees and three part-time employees.



Web Site Access to Company’s Reports



Our website address is http://www.ampliphibio.com.
Our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to
those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act are available free of charge through
our website as soon as reasonably practicable after they are electronically filed with, or furnished to, the Securities and Exchange
Commission, or the SEC. We will also provide the reports in electronic or paper form free of charge upon request. Our website
and the information contained on, or that can be accessed through our website, will not be deemed to be incorporated by reference
in, and are not considered part of, this Annual Report on Form 10-K.



28







Item 1A.
RISK FACTORS.



An investment in our common stock involves
a high degree of risk. We operate in an industry that involves numerous risks and uncertainties. The risks and uncertainties described
below are not the only ones we face. Other risks and uncertainties, including those that we do not currently consider material,
may impair our business. If any of the risks discussed below actually occur, our business, financial condition, operating results
or cash flows could be materially adversely affected. This could cause the trading price of our common stock to decline, and you
may lose all or part of your investment.



Risks Related to Our Business



We are seeking to develop antibacterial agents
using bacteriophage technology, which has not resulted in any approved product on the market to date.



We are developing our product candidates with
bacteriophage technology. We have not, nor to our knowledge has any other company, received regulatory approval from the U.S.
Food and Drug Administration, or FDA or equivalent foreign agencies for a pharmaceutical drug based on this approach. While in
vitro studies have characterized the behavior of bacteriophages in cell cultures and there exists a body of literature regarding
the use of phage therapy in humans, the safety and efficacy of phage therapy in humans has not been extensively studied in well-controlled
modern clinical trials. Most of the prior research on phage-based therapy was conducted in the former Soviet Union prior to and
immediately after World War II and lacked appropriate control group design or lacked control groups at all. Furthermore, the standard
of care has changed substantially during the ensuing decades since those studies were performed, making claims of improved cure
rates open for debate. We cannot be certain that our approach will lead to the development of approvable or marketable drugs.



Developing phage-based therapies on a commercial
scale will also require developing new manufacturing processes and techniques. We and our third-party collaborators may experience
delays in developing manufacturing capabilities for our product candidates, and may not be able to do so at the scale required
to conduct efficiently the clinical trials required to obtain regulatory approval of our products, or to manufacture commercial
quantities of our products, if approved.



In addition, the FDA or other regulatory agencies
may lack experience in evaluating the safety and efficacy of drugs based on these targeting approaches, which could lengthen the
regulatory review process, increase our development costs and delay or prevent commercialization of our product candidates.



Delays in our clinical trials could result in
us not achieving anticipated developmental milestones when expected, increased costs and delay our ability to obtain regulatory
approval and commercialize our product candidates.



Delays in our ability to commence or enroll
patients for our clinical trials could result in us not meeting anticipated clinical milestones and could materially impact our
product development costs and delay regulatory approval of our product candidates. We do not know whether planned clinical trials
will be commenced or completed on schedule, if at all. Clinical trials can be delayed for a variety of reasons, including:



| | · | delays in the development of manufacturing capabilities for our product candidates to enable
    their consistent production at clinical trial scale;                                        
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| |   |                                                                                                                                                                                              
| | · | delays in the commencement of clinical trials as a result of clinical trial holds or the
    need to obtain additional information to complete an Investigational New Drug Application (IND);
| |   |                                                                                                                                                                                              
| | · | delays in obtaining regulatory approval to commence new trials;                                                                                                                              
| |   |                                                                                                                                                                                              
| | · | adverse safety events experienced during our clinical trials;                                                                                                                                
| |   |                                                                                                                                                                                              
| | · | delays in obtaining clinical materials;                                                                                                                                                      
| |   |                                                                                                                                                                                              
| | · | slower than expected patient recruitment for participation in clinical trials; and                                                                                                           



29







| | · | delays in reaching agreement on acceptable clinical trial agreement terms with prospective
    sites or obtaining institutional review board approval.
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------



If we do not successfully commence or complete
our clinical trials on schedule, the price of our common stock may decline.



We have not completed formulation development
of any of our product candidates.



The development of our bacteria phage product
candidates requires that we isolate, select and combine a number of bacteria phages that target the desired bacteria for that
product candidate. The selection of bacteria phages for any of our product candidates is based on a variety of factors, including
without limitation the ability of the selected phages, in combination, to successfully kill the targeted bacteria, the degree
of cross-reactivity of the individual phages with the same part of the bacterial targets, the ability of the combined phages to
satisfy regulatory requirements, our ability to manufacture sufficient quantities of the phages, intellectual property rights
of third parties, and other factors. While we have selected an initial formulation of AmpliPhage-002 for the treatment of methicillin-resistant
S. aureus (MRSA) infections, there can be no assurance that this will be the final formulation of AmpliPhage-002 for commercialization.
In addition, we are still finalizing initial formulations of AmpliPhage-001 and AmpliPhage-004. If we are unable to complete formulation
development of our product candidates in the time frame that we have anticipated, then our product development timelines, and
the regulatory approval of our product candidates, could be delayed.



Preclinical studies and Phase 1 or 2 clinical
trials of our product candidates may not predict the results of subsequent human clinical trials.



Preclinical studies, including studies of
our product candidates in animal models of disease, may not accurately predict the result of human clinical trials of those product
candidates. In particular, promising animal studies suggesting the efficacy of prototype phage products in the treatment of bacterial
infections, such as P. aeruginosa may not predict the ability of these products to treat similar infections in humans.
Our phage technology may be found not to be efficacious in treating bacterial infections alone or in combination with other agents,
when studied in human clinical trials.



To satisfy FDA or foreign regulatory approval
standards for the commercial sale of our product candidates, we must demonstrate in adequate and controlled clinical trials that
our product candidates are safe and effective. Success in early clinical trials, including Phase 2 trials, does not ensure that
later clinical trials will be successful. Our initial results from Phase 1/2 clinical trials also may not be confirmed by later
analysis or subsequent larger clinical trials. A number of companies in the pharmaceutical industry have suffered significant
setbacks in advanced clinical trials, even after obtaining promising results in earlier clinical trials.



Our product candidates must undergo rigorous clinical
testing, the results of which are uncertain and could substantially delay or prevent us from bringing them to market.



Before we can obtain regulatory approval for
a product candidate, we must undertake extensive clinical testing in humans to demonstrate safety and efficacy to the satisfaction
of the FDA or other regulatory agencies. Clinical trials of new drug candidates sufficient to obtain regulatory marketing approval
are expensive and take years to complete.



We cannot be certain of successfully completing
clinical testing within the time frame we have planned, or at all. We may experience numerous unforeseen events during, or as
a result of, the clinical trial process that could delay or prevent us from receiving regulatory approval or commercializing our
product candidates, including the following:



| | · | our clinical trials may produce negative or inconclusive results, and we may decide, or
    regulators may require us, to conduct additional clinical and/or preclinical testing or to abandon programs;
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | the results obtained in earlier stage clinical testing may not be indicative of results
    in future clinical trials;
| | - | ----------------------------------------------------------------------------------------------------------------------



30







| | · | clinical trial results may not meet the level of statistical significance required by the
    FDA or other regulatory agencies;
| | - | -------------------------------------------------------------------------------------------------------------------------------



| | · | enrollment in our clinical trials for our product candidates may be slower than we anticipate,
    resulting in significant delays and additional expense;
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | we, or regulators, may suspend or terminate our clinical trials if the participating patients
    are being exposed to unacceptable health risks; and
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------



| | · | the effects of our product candidates on patients may not be the desired effects or may
    include undesirable side effects or other characteristics that may delay or preclude regulatory approval or limit their commercial
    use, if approved.
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Completion of clinical trials depends, among
other things, on our ability to enroll a sufficient number of patients, which is a function of many factors, including:



| | · | the therapeutic endpoints chosen for evaluation;
| | - | ------------------------------------------------



| | · | the eligibility criteria defined in the protocol;
| | - | -------------------------------------------------



| | · | the perceived benefit of the investigational drug under study;
| | - | --------------------------------------------------------------



| | · | the size of the patient population required for analysis of the clinical trial’s therapeutic
    endpoints;
| | - | -----------------------------------------------------------------------------------------------------------



| | · | our ability to recruit clinical trial investigators and sites with the appropriate competencies
    and experience;
| | - | -------------------------------------------------------------------------------------------------------------------



| | · | our ability to obtain and maintain patient consents; and
| | - | --------------------------------------------------------



| | · | competition for patients by clinical trial programs for other treatments.
| | - | -------------------------------------------------------------------------



We may experience difficulties in enrolling
patients in our clinical trials, which could increase the costs or affect the timing or outcome of these clinical trials. This
is particularly true with respect to diseases with relatively small patient populations.



We must develop manufacturing processes for our
lead product candidates and any delay in or our inability to do so would result in delays in our clinical trials and materially
and negatively affect our business and results.



We are developing novel manufacturing processes
for the production of AmpliPhage-002 for treatment of S. aureus (MRSA) infections, AmpliPhage-001for the treatment of P.
aeruginosainfections and AmpliPhage-004 for the treatment of C. difficileinfections at facilities in Ljubljana, Slovenia.
The manufacturing processes for our product candidates, and the scale up of such processes for clinical trials, is novel, and
there can be no assurance that we will be able to complete this work in a timely manner, if at all. Any delay in the development
or scale up of these manufacturing processes could delay the start of clinical trials and harm our business. Our facilities in
Slovenia must also undergo inspections by JAZMP, the Slovenian agency that regulates and supervises pharmaceutical products in
Slovenia, for compliance with their and the FDA’s current good manufacturing practice regulations, or cGMP regulations,
before the respective product candidates can be approved for use in clinical trials or commercialization. As a result of an initial
inspection, we are taking certain corrective actions regarding the manufacture of AmpliPhage-002, which we believe will lead to
certification by JAZMP to manufacture AmpliPhage-002; however, there can be no assurance that we will receive such certification.
We will also be subject to additional inspections for GMP compliance for our other product candidates, and may be subject to additional
inspections for AmpliPhage-002. In the event these facilities do not receive a satisfactory cGMP inspection for the manufacture
of our product candidates, we may need to fund additional modifications to our manufacturing process, conduct additional validation
studies, or find alternative manufacturing facilities, any of which would result in significant cost to us as well as a delay
of up to several years in obtaining approval for such product candidates.



31







Our manufacturing facilities will be subject
to ongoing periodic inspection by the European regulatory authorities, including JAZMP, and the FDA for compliance with European
and FDA cGMP regulations. Compliance with these regulations and standards is complex and costly, and there can be no assurance
that we will be able to comply. Any failure to comply with applicable regulations could result in sanctions being imposed (including
fines, injunctions and civil penalties), failure of regulatory authorities to grant marketing approval of our product candidates,
delays, suspension or withdrawal of approvals, license revocation, seizures or recalls of product candidates or products, operating
restrictions and criminal prosecution.



We have conducted and may in the future conduct
clinical trials for our products or product candidates outside the United States and the FDA may not accept data from such trials.



We have conducted and may in the future choose
to conduct one or more of our clinical trials outside the United States. Although the FDA may accept data from clinical trials
conducted outside the United States, acceptance of such study data by the FDA is subject to certain conditions. For example, the
study must be well designed and conducted and performed by qualified investigators in accordance with ethical principles. The
study population must also adequately represent the U.S. population, and the data must be applicable to the U.S. population and
U.S. medical practice in ways that the FDA deems clinically meaningful. Generally, the patient population for any clinical studies
conducted outside of the United States must be representative of the population for whom we intend to label the product in the
United States. In addition, such studies would be subject to the applicable local laws and FDA acceptance of the data would be
dependent upon its determination that the studies also complied with all applicable U.S. laws and regulations. There can be no
assurance the FDA will accept data from trials conducted outside of the United States. If the FDA does not accept any such data,
it would likely result in the need for additional trials, which would be costly and time consuming and delay aspects of our business
plan.



We may need to license additional intellectual
property rights.



The development and commercialization of phage-based
antibacterial agents may require us to obtain rights to intellectual property from third parties. For example, pursuant to our
Collaborative Research and Development Agreement, or CRADA, with the United States Army Medical Research and Materiel Command,
or USAMRMC and the Walter Reed Army Institute of Research, or WRAIR, we are focusing on developing bacteriophage therapeutics
to treat S. aureus, E. coli and P. aeruginosa infections. To the extent the intellectual property is generated
from the USAMRMC or WRAIR that is used in a commercial product, we may be obligated to make payments such as royalties, licensing
fees and milestone payments. We may also determine that it is necessary or advisable to license other intellectual property from
third parties. There can be no assurance that such intellectual property rights would be available on commercially reasonable
terms, if at all.



We are subject to significant regulatory approval
requirements, which could delay, prevent or limit our ability to market our product candidates.



Our research and development activities, preclinical
studies, clinical trials and the anticipated manufacturing and marketing of our product candidates are subject to extensive regulation
by the FDA and other regulatory agencies in the United States and by comparable authorities in Europe and elsewhere. For example,
our research facilities in Colworth, United Kingdom, recently failed an audit by the Health and Safety Executive, Britain’s
national regulatory for workplace health and safety; as a result of this failure we have elected to reconfigure our research operations.
There can be no assurance that our planned manufacturing facilities will satisfy the requirements of the FDA or comparable foreign
authorities. We require the approval of the relevant regulatory authorities before we may commence commercial sales of our product
candidates in a given market. The regulatory approval process is expensive and time-consuming, and the timing of receipt of regulatory
approval is difficult to predict. Our product candidates could require a significantly longer time to gain regulatory approval
than expected, or may never gain approval. We cannot be certain that, even after expending substantial time and financial resources,
we will obtain regulatory approval for any of our product candidates. A delay or denial of regulatory approval could delay or
prevent our ability to generate product revenues and to achieve profitability.



Changes in regulatory approval policies during
the development period of any of our product candidates, changes in, or the enactment of, additional regulations or statutes,
or changes in regulatory review practices for a submitted product application may cause a delay in obtaining approval or result
in the rejection of an application for regulatory approval.



32







Regulatory approval, if obtained, may be made
subject to limitations on the indicated uses for which we may market a product. These limitations could adversely affect our potential
product revenues. Regulatory approval may also require costly post-marketing follow-up studies. In addition, the labeling, packaging,
adverse event reporting, storage, advertising, promotion and record-keeping related to the product will be subject to extensive
ongoing regulatory requirements. Furthermore, for any marketed product, its manufacturer and its manufacturing facilities will
be subject to continual review and periodic inspections by the FDA or other regulatory authorities. Failure to comply with applicable
regulatory requirements may, among other things, result in fines, suspensions of regulatory approvals, product recalls, product
seizures, operating restrictions and criminal prosecution.



The FDA and foreign regulatory authorities may
impose significant restrictions on the indicated uses and marketing of pharmaceutical products.



FDA rules for pharmaceutical promotion require
that a company not promote an unapproved drug or an approved drug for an unapproved use. In addition to FDA requirements, regulatory
and law enforcement agencies, such as the United States Department of Health and Human Services’ Office of Inspector General
and the United States Department of Justice, monitor and investigate pharmaceutical sales, marketing and other practices. For
example, sales, marketing and scientific/educational grant programs must comply with the Medicare-Medicaid Anti-Fraud and Abuse
Act, as amended, the False Claims Act, as amended, and similar state laws. In recent years, actions by companies’ sales
forces and marketing departments have been scrutinized intensely to ensure, among other things, that actions by such groups do
not qualify as “kickbacks” to healthcare professionals. A “kickback” refers to the provision of any item
of value to a healthcare professional or other person in exchange for purchasing, recommending, or referring an individual for
an item or service reimbursable by a federal healthcare program. These kickbacks increase the expenses of the federal healthcare
program and may result in civil penalties, criminal prosecutions, and exclusion from participation in government programs, any
of which would adversely affect our financial condition and business operations. In addition, even if we are not determined to
have violated these laws, government investigations into these issues typically require the expenditure of significant resources
and generate negative publicity, which would also harm our financial condition. Comparable laws also exist at the state level.



Our relationships with customers and third-party
payors will be subject to applicable anti-kickback, fraud and abuse and other healthcare laws and regulations, which could expose
us to criminal sanctions, civil penalties, contractual damages, reputational harm and diminished profits and future earnings.



Healthcare providers, physicians and third-party
payors will play a primary role in the recommendation and prescription of any product candidates for which we obtain marketing
approval. Our future arrangements with third-party payors and customers may expose us to broadly applicable fraud and abuse and
other healthcare laws and regulations that may constrain the business or financial arrangements and relationships through which
we would market, sell and distribute our products. As a biotechnology company, even though we do not and will not control referrals
of healthcare services or bill directly to Medicare, Medicaid or other third-party payors, federal and state healthcare laws and
regulations pertaining to fraud and abuse and patients’ rights are and will be applicable to our business. Federal healthcare
Anti-Kickback Statute will constrain our marketing practices, educational programs, pricing policies, and relationships with healthcare
providers or other entities, by prohibiting, among other things, persons from knowingly and willfully soliciting, offering, receiving
or providing remuneration, directly or indirectly, in cash or in kind, to induce or reward, or in return for, either the referral
of an individual for, or the purchase, order or recommendation of, any good or service, for which payment may be made under a
federal healthcare program such as Medicare and Medicaid. Federal civil and criminal false claims laws and civil monetary penalty
laws impose criminal and civil penalties, including through civil whistleblower or qui tam actions, against individuals or entities
for knowingly presenting, or causing to be presented, to the federal government, including the Medicare and Medicaid programs,
claims for payment that are false or fraudulent or making a false statement to avoid, decrease or conceal an obligation to pay
money to the federal government. The federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, imposes criminal
and civil liability for executing a scheme to defraud any healthcare benefit program and also created federal criminal laws that
prohibit knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false statements
in connection with the delivery of or payment for healthcare benefits, items or services. HIPAA, as amended by the Health Information
Technology for Economic and Clinical Health Act, or HITECH, also imposes obligations, including mandatory contractual terms, with
respect to safeguarding the privacy, security and transmission of individually identifiable health information.



33







The federal physician sunshine requirements
under the Affordable Care Act requires manufacturers of drugs, devices, biologics and medical supplies to report annually to HHS
information related to payments and other transfers of value to physicians, other healthcare providers, and teaching hospitals,
and ownership and investment interests held by physicians and other healthcare providers and their immediate family members and
applicable group purchasing organizations. Analogous state and foreign laws and regulations, such as state anti-kickback and false
claims laws, may apply to sales or marketing arrangements and claims involving healthcare items or services reimbursed by non-governmental
third-party payors, including private insurers; some state laws require pharmaceutical companies to comply with the pharmaceutical
industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government and
may require drug manufacturers to report information related to payments and other transfers of value to physicians and other
healthcare providers or marketing expenditures. State and foreign laws also govern the privacy and security of health information
in specified circumstances, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus
complicating compliance efforts. Efforts to ensure that our business arrangements with third parties will comply with applicable
healthcare laws and regulations will involve substantial costs. It is possible that governmental authorities will conclude that
our business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and
abuse or other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other
governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties,
damages, fines, imprisonment, exclusion from government funded healthcare programs, such as Medicare and Medicaid, and the curtailment
or restructuring of our operations. If any physicians or other healthcare providers or entities with whom we expect to do business
are found to not be in compliance with applicable laws, they may be subject to criminal, civil or administrative sanctions, including
exclusions from government funded healthcare programs.



We are, and in the future may be, subject to new
federal and state requirements to submit information on our open and completed clinical trials to public registries and databases.



In 1997, a public registry of open clinical
trials involving drugs intended to treat serious or life-threatening diseases or conditions was established under the Food and
Drug Administration Modernization Act, or FDMA, in order to promote public awareness of and access to these clinical trials. Under
FDMA, pharmaceutical manufacturers and other clinical trial sponsors are required to post the general purpose of these clinical
trials, as well as the eligibility criteria, location and contact information of the clinical trials. Since the establishment
of this registry, there has been significant public debate focused on broadening the types of clinical trials included in this
or other registries, as well as providing for public access to clinical trial results. A voluntary coalition of medical journal
editors has adopted a resolution to publish results only from those clinical trials that have been registered with a no-cost,
publicly accessible database, such as www.clinicaltrials.gov. The Pharmaceuticals and Research Manufacturers of America
has also issued voluntary principles for its members to make results from certain clinical trials publicly available and has established
a website for this purpose. Other groups have adopted or are considering similar proposals for clinical trial registration and
the posting of clinical trial results. The state of Maine has enacted legislation, with penalty provisions, requiring the disclosure
of results from clinical trials involving drugs marketed in the state, and similar legislation has been introduced in other states.
Federal legislation was introduced in the fall of 2004 to expand www.clinicaltrials.gov and to require the inclusion of
clinical trial results in this registry. In some states, such as New York, prosecutors have alleged that a lack of disclosure
of clinical trial information constitutes fraud, and these allegations have resulted in settlements with pharmaceutical companies
that include agreements to post clinical trial results. Our failure to comply with any clinical trial posting requirements could
expose us to negative publicity, fines, and other penalties, all of which could materially harm our business.



We do not have a sales force and do
not currently have plans to develop one.



The commercial success of any of our product
candidates will depend upon the strength of sales and marketing efforts for them. We do not have a sales force and have no experience
in sales, marketing or distribution. To successfully commercialize our product candidates, we will need to develop such a capability
ourselves or seek assistance from a third party with a large distribution system and a large direct sales force. We may be unable
to put such a plan in place. In addition, if we arrange for others to market and sell our products, our revenues will depend upon
the efforts of those parties. Such arrangements may not succeed. Even if one or more of our product candidates is approved for
marketing, if we fail to establish adequate sales, marketing and distribution capabilities, independently or with others, our
business will be materially harmed.



34







We must raise capital to continue operations



Our consolidated financial statements were
prepared under the assumption that we would continue our operations as a going concern. However, as discussed in Note 2 to our
consolidated financial statements, we have had recurring losses from operations, negative operating cash flow and an accumulated
deficit.



In December 2013, we completed a private placement
of shares of our common stock, which raised approximately $18 million, prior to commissions. We do not generate any cash from
operations and must raise additional funds in order to continue operating our business. We expect to continue to fund our operations
primarily through equity and debt financings in the future. If additional capital is not available, we may not be able to continue
to operate our business pursuant to our business plan or we may have to discontinue our operations entirely.



Developing drugs and conducting clinical trials
is expensive. Our future funding requirements will depend on many factors, including:



| | · | the costs and timing of our research and development activities;
| | - | ----------------------------------------------------------------



| | · | the progress and cost of our clinical trials and other research and development activities;
| | - | -------------------------------------------------------------------------------------------



| | · | the cost and timing of securing manufacturing capabilities for our clinical product candidates
    and commercial products, if any;
| | - | -----------------------------------------------------------------------------------------------------------------------------------



| | · | the terms and timing of any collaborative, licensing, acquisition or other arrangements
    that we may establish;
| | - | ------------------------------------------------------------------------------------------------------------------



| | · | the costs and timing of obtaining regulatory approvals;
| | - | -------------------------------------------------------



| | · | the costs of filing, prosecuting, defending and enforcing any patent applications, claims,
    patents and other intellectual property rights; and
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------



| | · | the costs of lawsuits involving us or our product candidates.
| | - | -------------------------------------------------------------



We will seek additional capital to support
our product development activities. We may seek funds through arrangements with collaborators or others that may require us to
relinquish rights to the products candidates that we might otherwise seek to develop or commercialize independently. We cannot
be certain that we will be able to enter into any such arrangements on reasonable terms, if at all.



We may seek to raise capital through a variety
of sources, including:



| | · | the public equity market;
| | - | -------------------------



| | · | private equity financing;
| | - | -------------------------



| | · | collaborative arrangements;
| | - | ---------------------------



| | · | licensing arrangements; and/or
| | - | ------------------------------



| | · | public or private debt.
| | - | -----------------------



35







Our ability to raise additional funds will
depend, in part, on the status of our product development activities and other business operations, as well as factors related
to financial, economic, and market conditions, collaboration or license agreement with others and factors related to financial,
economic and market conditions, many of which are beyond our control. We cannot be certain that sufficient funds will be available
to us when required or on satisfactory terms, if at all. Raising additional capital through the sale of securities could cause
significant dilution to our stockholders. If adequate funds are not available, we may be required to significantly reduce or refocus
our operations or to obtain funds through additional arrangements that may require us to relinquish rights to certain of our products,
technologies or potential markets, any of which could delay or require that we curtail or eliminate some or all of our development
programs or otherwise have a material adverse effect on our business, financial condition and results of operations. In addition,
we may have to delay, reduce the scope of or eliminate some of our research and development, which could delay the time to market
for any of our product candidates, if adequate funds are not available.



If we are unable to secure additional financing
on a timely basis or on terms favorable to us, we may be required to cease or reduce certain research and development projects,
to sell some or all of our technology or assets or to merge all or a portion of our business with another entity. Insufficient
funds may require us to delay, scale back, or eliminate some or all of our activities, and if we are unable to obtain additional
funding, there is uncertainty regarding our continued existence.



Risks Related to Our Financial Performance and Operations



We have incurred losses since our inception and
anticipate that we will continue to incur significant losses for the foreseeable future, and our future profitability is uncertain.



We have incurred losses in each year since
our inception in 1992. Prior to the merger of Targeted Genetics Corporation with Biocontrol in January 2011, our accumulated deficit
was $315.5 million, and Biocontrol had an accumulated deficit of $6.9 million. Since January 2011, we have incurred a cumulative
deficit of $385.1 million, and we expect to incur losses for the foreseeable future. We have devoted, and will continue to devote
for the foreseeable future, substantially all of our resources to research and development of our product candidates. For the
year ended December 31, 2012, we had a loss from operations of $4.0 million and a net loss of $1.1 million. For the year ended
December 31, 2013, we had a loss from operations of $12.4 million and a net loss of $64.6 million. Clinical trials and activities
associated with discovery research are costly. We do not expect to generate any revenue from the commercial sales of our product
candidates in the near term, and we expect to continue to have significant losses for the foreseeable future.



To attain ongoing profitability, we will need
to develop products successfully and market and sell them effectively, or rely on other parties to do so. We cannot predict when
we will achieve ongoing profitability, if at all. We have never generated revenue from the commercial sales of our product candidates,
and there is no guarantee that we will be able to do so in the future. If we fail to become profitable, or if we are unable to
fund our continuing losses, we would be unable to continue our research and development programs.



Our success depends in part on retaining and motivating
key personnel and, if we fail to do so, it may be more difficult for us to execute our business strategy. As a small organization
we are dependent on key employees and may need to hire additional personnel to execute our business strategy successfully.



Our success depends on our continued ability
to attract, retain and motivate highly qualified management, clinical and scientific personnel and on our ability to develop and
maintain important relationships with leading academic institutions, clinicians and scientists. We are highly dependent upon our
senior management, particularly our Chief Executive Officer, Philip J. Young. The loss of the services of Mr. Young or one or
more of our other key employees could delay or have an impact on the successful completion of our clinical trials or the development
of additional product candidates.



As of March 24, 2014, we had twelve employees.
Our success will depend on our ability to retain and motivate remaining personnel and hire additional qualified personnel when
required. Competition for qualified personnel in the biotechnology field is intense. We face competition for personnel from other
biotechnology and pharmaceutical companies, universities, public and private research institutions and other organizations. We
may not be able to attract and retain qualified personnel on acceptable terms given the competition for such personnel. If we
are unsuccessful in our retention, motivation and recruitment efforts, we may be unable to execute our business strategy.



36







We have determined that a material weakness existed
in our system of internal control over financial reporting, which could have had a material impact on our business.



We are required to maintain internal control
over financial reporting adequate to provide reasonable assurance regarding the reliability of financial reporting and the preparation
of our consolidated financial statements in accordance with generally accepted accounting principles. In connection with the restatement
of our consolidated financial statements for the year ended December 31, 2012 and the quarter ended September 30, 2013, we determined
that we had a material weakness as of December 31, 2013, namely that our controls over the evaluation and review of complex and
non-routine transactions were not effective.



Due to this material weakness, we have concluded
that as of December 31, 2013, our internal controls over financial reporting were not effective. Subsequent to December 31, 2013,
we have restated our consolidated financial statements as of December 31, 2013 to correct for errors caused by this weakness.



We do not expect that our internal control
over financial reporting will prevent all errors and all fraud. A control system, no matter how well designed and operated, can
provide only reasonable, not absolute, assurance that the control system’s objectives will be met. Further, the design of
a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative
to their costs. Controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by
management override of the controls. Over time, controls may become inadequate because changes in conditions or deterioration
in the degree of compliance with policies or procedures may occur. Because of the inherent limitations in a cost-effective control
system, misstatements due to error or fraud may occur and not be detected. As a result, we cannot assure you that significant
deficiencies or material weaknesses in our internal control over financial reporting will not be identified in the future. A material
weakness means a deficiency, or combination of deficiencies, in internal control over financial reporting such that there is a
reasonable possibility that a material misstatement of the registrant’s annual or interim financial statements will not
be prevented or detected on a timely basis.



Risks Related to Our Dependence on Third Parties



We rely on third parties for aspects of product
development.



We rely on third parties such as the University
of Leicester for certain aspects of product development. We are working with the University of Leicester for research and development
of product candidates to treat C. difficile infections and we are working with Intrexon to develop new strains of manufacturing
hosts for our phage therapies. Because we rely on third parties to conduct these activities, we have less control over the success
of these programs than we would if we were conducting them on our own. Factors beyond our control that could impact the success
of these programs include the amount of resources devoted to the programs by the applicable third party, the staffing of those
projects by third-party personnel, and the amount of time such personnel devote to our programs compared to other programs. Failure
of our third-party collaborators to successfully complete the projects that we are working on with them could result in delays
in product development and the need to expend additional resources, increasing our expenses beyond current expectations.



We will rely on third parties to conduct some
of our clinical trials, and their failure to perform their obligations in a timely or competent manner may delay development and
commercialization of our product candidates.



We expect to use clinical research organizations
to assist in conduct of our clinical trials. There are numerous alternative sources to provide these services. However, we may
face delays outside of our control if these parties do not perform their obligations in a timely or competent fashion or if we
are forced to change service providers. This risk is heightened for clinical trials conducted outside of the United States, where
it may be more difficult to ensure that clinical trials are conducted in compliance with FDA requirements. Any third-party that
we hire to conduct clinical trials may also provide services to our competitors, which could compromise the performance of their
obligations to us. If we experience significant delays in the progress of our clinical trials and in our plans to file New Drug
Applications (NDAs), the commercial prospects for product candidates could be harmed and our ability to generate product revenue
would be delayed or prevented.



37







We must manage a geographically dispersed
organization.



While we are a small company, we currently
have operations in the United States, Australia, United Kingdom and Slovenia. In the future, we may also locate facilities in
other locations based on proximity to personnel with the expertise needed to research, develop and manufacture phage-based therapeutics,
costs of operations or other factors. Managing our organization across multiple locations and multiple time zones may reduce our
efficiency, increase our expenses and increase the risk of operational difficulties in the execution of our plans.



Risks Related to Our Intellectual Property



We are dependent on patents and proprietary technology.
If we fail to adequately protect this intellectual property or if we otherwise do not have exclusivity for the marketing of our
products, our ability to commercialize products could suffer.



Our commercial success will depend in part
on our ability to obtain and maintain patent protection sufficient to prevent others from marketing our product candidates, as
well as to defend and enforce these patents against infringement and to operate without infringing the proprietary rights of others.
Protection of our product candidates from unauthorized use by third parties will depend on having valid and enforceable patents
cover our product candidates or their manufacture or use, or having effective trade secret protection. If our patent applications
do not result in issued patents, or if our patents are found to be invalid, we will lose the ability to exclude others from making,
using or selling the inventions claimed therein. We have a limited number of patents and pending patent applications.



The patent positions of biotechnology companies
can be uncertain and involve complex legal and factual questions. This is due to inconsistent application of policy and changes
in policy relating to examination and enforcement of biotechnology patents to date on a global scale. The laws of some countries
may not protect intellectual property rights to the same extent as the laws of countries having well-established patent systems,
and those countries may lack adequate rules and procedures for defending our intellectual property rights. Also, changes in either
patent laws or in interpretations of patent laws may diminish the value of our intellectual property. We are not able to guarantee
that all of our patent applications will result in the issuance of patents and we cannot predict the breadth of claims that may
be allowed in our patent applications or in the patent applications we may license from others.



The degree of future protection for our proprietary
rights is uncertain because legal means afford only limited protection and may not adequately protect our rights or permit us
to gain or keep our competitive advantage. For example:



| | · | we might not have been the first to make the inventions covered by each of our pending patent
    applications and issued patents, and we may have to participate in expensive and protracted interference proceedings to determine
    priority of invention;
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | we might not have been the first to file patent applications for these inventions;
| | - | ----------------------------------------------------------------------------------



| | · | others may independently develop similar or alternative product candidates to any of our
    product candidates that fall outside the scope of our patents;
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | our pending patent applications may not result in issued patents;
| | - | -----------------------------------------------------------------



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



| | · | others may design around our patent claims to produce competitive products that fall outside
    the scope of our patents;
| | - | --------------------------------------------------------------------------------------------------------------------------



38







| | · | we may not develop additional patentable proprietary technologies related to our product
    candidates; and
| | - | ------------------------------------------------------------------------------------------------------------



| | · | we are dependent upon the diligence of our appointed agents in national jurisdictions, acting
    for and on our behalf, which control the prosecution of pending domestic and foreign patent applications and maintain granted
    domestic and foreign patents.
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



An issued patent does not guarantee us the
right to practice the patented technology or commercialize the patented product. Third parties may have blocking patents that
could be used to prevent us from commercializing our patented products and practicing our patented technology. Our issued patents
and those that may be issued in the future may be challenged, invalidated or circumvented, which could limit our ability to prevent
competitors from marketing the same or related product candidates or could limit the length of the term of patent protection of
our product candidates. Moreover, because of the extensive time required for development, testing and regulatory review of a potential
product, it is possible that, before any of our product candidates can be commercialized, any related patent may expire or remain
in force for only a short period following commercialization, thereby reducing any advantage of the patent. Patent term extensions
may not be available for these patents.



We rely on trade secrets and other forms of non-patent
intellectual property protection. If we are unable to protect our trade secrets, other companies may be able to compete more effectively
against us.



We rely on trade secrets to protect certain
aspects of our technology, including our proprietary processes for manufacturing and purifying bacteriophages. Trade secrets are
difficult to protect, especially in the pharmaceutical industry, where much of the information about a product must be made public
during the regulatory approval process. Although we use reasonable efforts to protect our trade secrets, our employees, consultants,
contractors, outside scientific collaborators and other advisors may unintentionally or willfully disclose our information to
competitors. Enforcing a claim that a third party illegally obtained and is using our trade secret information is expensive and
time-consuming, and the outcome is unpredictable. In addition, courts outside the United States may be less willing to or may
not protect trade secrets. Moreover, our competitors may independently develop equivalent knowledge, methods and know-how.



If we are sued for infringing intellectual property
rights of third parties or if we are forced to engage in an interference proceeding, it will be costly and time-consuming, and
an unfavorable outcome in that litigation or interference would have a material adverse effect on our business.



Our ability to commercialize our product candidates
depends on our ability to develop, manufacture, market and sell our product candidates without infringing the proprietary rights
of third parties. Numerous United States and foreign patents and patent applications, which are owned by third parties, exist
in the general field of anti-infective products or in fields that otherwise may relate to our product candidates. If we are shown
to infringe, we could be enjoined from use or sale of the claimed invention if we are unable to prove that the patent is invalid.
In addition, because patent applications can take many years to issue, there may be currently pending patent applications, unknown
to us, which may later result in issued patents that our product candidates may infringe, or which may trigger an interference
proceeding regarding one of our owned or licensed patents or applications. There could also be existing patents of which we are
not aware that our product candidates may inadvertently infringe or which may become involved in an interference proceeding.



The biotechnology and pharmaceutical industries
are characterized by the existence of a large number of patents and frequent litigation based on allegations of patent infringement.
For so long as our product candidates are in clinical trials, we believe our clinical activities fall within the scope of the
exemptions provided by 35 U.S.C. Section 271(e) in the United States, which exempts from patent infringement liability activities
reasonably related to the development and submission of information to the FDA. As our clinical investigational drug product candidates
progress toward commercialization, the possibility of a patent infringement claim against us increases. While we attempt to ensure
that our active clinical investigational drugs and the methods we employ to manufacture them, as well as the methods for their
use we intend to promote, do not infringe other parties’ patents and other proprietary rights, we cannot be certain they
do not, and competitors or other parties may assert that we infringe their proprietary rights in any event.



39







We may be exposed to future litigation based
on claims that our product candidates, or the methods we employ to manufacture them, or the uses for which we intend to promote
them, infringe the intellectual property rights of others. Our ability to manufacture and commercialize our product candidates
may depend on our ability to demonstrate that the manufacturing processes we employ and the use of our product candidates do not
infringe third-party patents. If third-party patents were found to cover our product candidates or their use or manufacture, we
could be required to pay damages or be enjoined and therefore unable to commercialize our product candidates, unless we obtained
a license. A license may not be available to us on acceptable terms, if at all.



Risks Related to Our Industry



If our competitors are able to develop and market
products that are more effective, safer or more affordable than ours, or obtain marketing approval before we do, our commercial
opportunities may be limited.



Competition in the biotechnology and pharmaceutical
industries is intense and continues to increase. Some companies that are larger and have significantly more resources than we
do are aggressively pursuing antibacterial development programs, including traditional therapies and therapies with novel mechanisms
of action. In addition, other companies are developing phage-based products for non-therapeutic uses, and may elect to use their
expertise in phage development and manufacturing to try to develop products that would compete with ours.



We also face potential competition from academic
institutions, government agencies and private and public research institutions engaged in the discovery and development of drugs
and therapies. Many of our competitors have significantly greater financial resources and expertise in research and development,
preclinical testing, conducting clinical trials, obtaining regulatory approvals, manufacturing, sales and marketing than we do.
Smaller or early-stage companies may also prove to be significant competitors, particularly through collaborative arrangements
with large and established pharmaceutical companies.



Our competitors may succeed in developing
products that are more effective, have fewer side effects and are safer or more affordable than our product candidates, which
would render our product candidates less competitive or noncompetitive. These competitors also compete with us to recruit and
retain qualified scientific and management personnel, establish clinical trial sites and patient registration for clinical trials,
as well as to acquire technologies and technology licenses complementary to our programs or advantageous to our business. Moreover,
competitors that are able to achieve patent protection, obtain regulatory approvals and commence commercial sales of their products
before we do, and competitors that have already done so, may enjoy a significant competitive advantage.



In July 2012, the Food and Drug Administration
Safety and Innovation Act was passed, which included the Generating Antibiotics Incentives Now Act, or the GAIN Act. The GAIN
Act is intended to provide incentives for the development of new, qualified infectious disease products. These incentives may
result in more competition in the market for new antibiotics, and may cause pharmaceutical and biotechnology companies with more
resources than we have to shift their efforts towards the development of products that could be competitive with our product candidates.



There is a substantial risk of product liability
claims in our business. If we do not obtain sufficient liability insurance, a product liability claim could result in substantial
liabilities.



Our business exposes us to significant potential
product liability risks that are inherent in the development, manufacturing and marketing of human therapeutic products. Regardless
of merit or eventual outcome, product liability claims may result in:



| | · | delay or failure to complete our clinical trials;
| | - | -------------------------------------------------



| | · | withdrawal of clinical trial participants;
| | - | ------------------------------------------



| | · | decreased demand for our product candidates;
| | - | --------------------------------------------



| | · | injury to our reputation;
| | - | -------------------------



40







| | · | litigation costs;
| | - | -----------------



| | · | substantial monetary awards against us; and
| | - | -------------------------------------------



| | · | diversion of management or other resources from key aspects of our operations.
| | - | ------------------------------------------------------------------------------



If we succeed in marketing products, product
liability claims could result in an FDA investigation of the safety or efficacy of our products, our manufacturing processes and
facilities or our marketing programs. An FDA investigation could also potentially lead to a recall of our products or more serious
enforcement actions, or limitations on the indications, for which they may be used, or suspension or withdrawal of approval.



We have product liability insurance that covers
our clinical trials up to a $10 million annual aggregate limit. We intend to expand our insurance coverage to include the sale
of commercial products if marketing approval is obtained for our product candidates or any other compound that we may develop.
However, insurance coverage is expensive and we may not be able to maintain insurance coverage at a reasonable cost or at all,
and the insurance coverage that we obtain may not be adequate to cover potential claims or losses.



Even if we receive regulatory approval to market
our product candidates, the market may not be receptive to our product candidates upon their commercial introduction, which would
negatively affect our ability to achieve profitability.



Our product candidates may not gain market
acceptance among physicians, patients, healthcare payors and the medical community. The degree of market acceptance of any approved
products will depend on a number of factors, including:



| | · | the effectiveness of the product;
| | - | ---------------------------------



| | · | the prevalence and severity of any side effects;
| | - | ------------------------------------------------



| | · | potential advantages or disadvantages over alternative treatments;
| | - | ------------------------------------------------------------------



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



| | · | the strength of marketing and distribution support;
| | - | ---------------------------------------------------



| | · | the price of the product, both in absolute terms and relative to alternative treatments;
    and
| | - | ------------------------------------------------------------------------------------------------



| | · | sufficient third-party coverage or reimbursement.
| | - | -------------------------------------------------



If our product candidates receive regulatory
approval but do not achieve an adequate level of acceptance by physicians, healthcare payors and patients, we may not generate
product revenues sufficient to attain profitability.



If third-party payors do not adequately reimburse
patients for any of our product candidates, if approved for marketing, we may not be successful in selling them.



Our ability to commercialize any products
successfully will depend in part on the extent to which reimbursement will be available from governmental and other third-party
payors, both in the United States and in foreign markets. Even if we succeed in bringing one or more products to the market, the
amount reimbursed for our products may be insufficient to allow us to compete effectively and could adversely affect our profitability.



Reimbursement by a governmental and other
third-party payor may depend upon a number of factors, including a governmental or other third-party payor’s determination
that use of a product is:



| | · | a covered benefit under its health plan;
| | - | ----------------------------------------



41







| | · | safe, effective and medically necessary;
| | - | ----------------------------------------



| | · | appropriate for the specific patient;
| | - | -------------------------------------



| | · | cost-effective; and
| | - | -------------------



| | · | neither experimental nor investigational.
| | - | -----------------------------------------



Obtaining reimbursement approval for a product
from each third-party and governmental payor is a time-consuming and costly process that could require us to provide supporting
scientific, clinical and cost-effectiveness data for the use of our products to each payor. We may not be able to provide data
sufficient to obtain reimbursement.



Eligibility for coverage does not imply that
any drug product will be reimbursed in all cases or at a rate that allows us to make a profit. Interim payments for new products,
if applicable, may also not be sufficient to cover our costs and may not become permanent. Reimbursement rates may vary according
to the use of the drug and the clinical setting in which it is used, may be based on payments allowed for lower-cost drugs that
are already reimbursed, may be incorporated into existing payments for other products or services and may reflect budgetary constraints
and/or Medicare or Medicaid data used to calculate these rates. Net prices for products also may be reduced by mandatory discounts
or rebates required by government healthcare programs or by any future relaxation of laws that restrict imports of certain medical
products from countries where they may be sold at lower prices than in the United States.



The healthcare industry is experiencing a
trend toward containing or reducing costs through various means, including lowering reimbursement rates, limiting therapeutic
class coverage and negotiating reduced payment schedules with service providers for drug products. The Medicare Prescription Drug,
Improvement and Modernization Act of 2003, or MMA, became law in November 2003 and created a broader prescription drug benefit
for Medicare beneficiaries. The MMA also contains provisions intended to reduce or eliminate delays in the introduction of generic
drug competition at the end of patent or non-patent market exclusivity. The impact of the MMA on drug prices and new drug utilization
over the next several years is unknown. The MMA also made adjustments to the physician fee schedule and the measure by which prescription
drugs are presently paid, changing from Average Wholesale Price to Average Sales Price. The effects of these changes are unknown
but may include decreased utilization of new medicines in physician prescribing patterns, and further pressure on drug company
sponsors to provide discount programs and reimbursement support programs. There have been, and we expect that there will continue
to be, federal and state proposals to constrain expenditures for medical products and services, which may affect reimbursement
levels for our future products. In addition, the Centers for Medicare & Medicaid Services frequently change product descriptors,
coverage policies, product and service codes, payment methodologies and reimbursement values. Third-party payors often follow
Medicare coverage policy and payment limitations in setting their own reimbursement rates and may have sufficient market power
to demand significant price reductions.



Foreign governments tend to impose strict price
controls, which may adversely affect our future profitability.



In some foreign countries, particularly in
the European Union, prescription drug pricing is subject to governmental control. In these countries, pricing negotiations with
governmental authorities can take considerable time after the receipt of marketing approval for a product. To obtain reimbursement
or pricing approval in some countries, we may be required to conduct a clinical trial that compares the cost-effectiveness of
our product candidate to other available therapies. If reimbursement of our products is unavailable or limited in scope or amount,
or if pricing is set at unsatisfactory levels, our profitability will be negatively affected.



42









We may incur significant costs complying with
environmental laws and regulations, and failure to comply with these laws and regulations could expose us to significant liabilities.



Our research and development activities use
biological and hazardous materials that are dangerous to human health and safety or the environment. We are subject to a variety
of federal, state and local laws and regulations governing the use, generation, manufacture, storage, handling and disposal of
these materials and wastes resulting from these materials. We are also subject to regulation by the Occupational Safety and Health
Administration, or OSHA, state and federal environmental protection agencies and to regulation under the Toxic Substances Control
Act. OSHA, state governments or federal Environmental Protection Agency, or EPA, may adopt regulations that may affect our research
and development programs. We are unable to predict whether any agency will adopt any regulations that could have a material adverse
effect on our operations. We have incurred, and will continue to incur, capital and operating expenditures and other costs in
the ordinary course of our business in complying with these laws and regulations.



Although we believe our safety procedures
for handling and disposing of these materials comply with federal, state and local laws and regulations, we cannot entirely eliminate
the risk of accidental injury or contamination from the use, storage, handling or disposal of hazardous materials. In the event
of contamination or injury, we could be held liable for any resulting damages, and any liability could significantly exceed our
insurance coverage.



Risks Related to Our Common Stock



The price of our common stock has been
and may continue to be volatile.



The stock markets in general, the markets
for biotechnology stocks and, in particular, the stock price of our common stock, have experienced extreme volatility. Although
we intend to apply to be listed on the NYSE MKT, our stock is currently quoted on the OTC Pink market, on the Limited Information
tier. The market for our common shares is characterized by significant price volatility when compared to the shares of larger,
more established companies that trade on a national securities exchange and have large public floats, and we expect that our share
price will continue to be more volatile than the shares of such larger, more established companies for the indefinite future,
even if we are listed on the NYSE MKT. The volatility in our share price is attributable to a number of factors. First, our common
shares are, compared to the shares of such larger, more established companies, sporadically and thinly traded. As a consequence
of this limited liquidity, the trading of relatively small quantities of shares by our stockholders may disproportionately influence
the price of those shares in either direction. The price for our shares could, for example, decline precipitously in the event
that a large number of our common shares are sold on the market without commensurate demand. Secondly, we are a speculative or
“risky” investment due to the early stage of our drug development programs and our lack of profits to date, and uncertainty
of future market acceptance for our potential products. As a consequence of this enhanced risk, more risk-adverse investors may,
under the fear of losing all or most of their investment in the event of negative news or lack of progress, be more inclined to
sell their shares on the market more quickly and at greater discounts than would be the case with the stock of a larger, more
established company that trades on a national securities exchange and has a large public float. Many of these factors are beyond
our control and may decrease the market price of our common shares, regardless of our operating performance. We cannot make any
predictions or projections as to what the prevailing market price for our common shares will be at any time, including as to whether
our common shares will sustain their current market prices, or as to what effect that the sale of shares or the availability of
common shares for sale at any time will have on the prevailing market price.



Price declines in our common stock could result
from general market and economic conditions and a variety of other factors, including:



| | · | adverse results or delays in our clinical trials;
| | - | -------------------------------------------------



| | · | adverse actions taken by regulatory agencies with respect to our product candidates, clinical
    trials or the manufacturing processes of our product candidates;
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | announcements of technological innovations, patents or new products by our competitors;
| | - | ---------------------------------------------------------------------------------------



| | · | regulatory developments in the United States and foreign countries;
| | - | -------------------------------------------------------------------



| | · | any lawsuit involving us or our product candidates;
| | - | ---------------------------------------------------



| | · | announcements concerning our competitors, or the biotechnology or pharmaceutical industries
    in general;
| | - | -----------------------------------------------------------------------------------------------------------



43







| | · | developments concerning any strategic alliances or acquisitions we may enter into;
| | - | ----------------------------------------------------------------------------------



| | · | actual or anticipated variations in our operating results;
| | - | ----------------------------------------------------------



| | · | changes in recommendations by securities analysts or lack of analyst coverage;
| | - | ------------------------------------------------------------------------------



| | · | deviations in our operating results from the estimates of analysts;
| | - | -------------------------------------------------------------------



| | · | sales of our common stock by our executive officers, directors and five percent stockholders
    or sales of substantial amounts of common stock; and
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------



| | · | loss of any of our key scientific or management personnel.
| | - | ----------------------------------------------------------



In the past, following periods of volatility
in the market price of a particular company’s securities, litigation has often been brought against that company. Any such
lawsuit could consume resources and management time and attention, which could adversely affect our business.



You may incur substantial dilution as
a result of future offerings of our securities.



You may incur substantial dilution as a
result of future offerings by us of debt or equity securities. Since inception, we have funded our operations primarily
through issuances of equity and debt. On June 26, 2013, we completed a private placement of convertible preferred stock and
warrants to purchase common stock with gross proceeds of approximately $7.0 million through the sale of shares of our
newly-created Series B Redeemable Convertible Preferred Stock. As part of the same transaction, approximately $5.5 million in
outstanding convertible notes were converted into shares of Series B Redeemable Convertible Preferred Stock and warrants to
purchase common stock. On July 15, 2013, we completed a second closing in which we converted approximately $0.8 million of
outstanding convertible notes into Series B Redeemable Convertible Preferred Stock and warrants to purchase common stock.
The financing was led by life-sciences investors RA Capital Management and Third Security, LLC, with participation
from BioScience Managers Pty Ltd.



Under the terms of the financing,
we issued an aggregate amount of approximately 10.0 million shares of Series B Redeemable Convertible Preferred Stock for
an aggregate purchase price of approximately $13.3 million (including the conversion of approximately $6.3 million
of outstanding convertible notes). Each share of Series B Redeemable Convertible Preferred Stock is convertible into 10
shares of common stock and accrues dividends at the rate of 10% per year. Additionally, we issued warrants to purchase an
aggregate of up to approximately 25.0 million shares of common stock at an exercise price of $0.14 per share.



A significant number of shares of our common stock
are subject to issuance upon exercise of outstanding warrants and options, which upon such exercise would result in dilution to
our security holders.



As of March 24, 2014, we have outstanding
warrants to purchase 42,746,165 shares of our common stock at an average exercise price of $0.16 per share, and outstanding options
to purchase 25,721,000 shares of our common stock at an average exercise price of $0.19 per share. The exercise price and/or the
number of shares of common stock issuable upon exercise of the warrants may be adjusted in certain circumstances, including certain
issuances of securities at a price equal to or less than the then current exercise price, subdivisions and stock splits, stock
dividends, combinations, reorganizations, reclassifications, consolidations, mergers or sales of properties and assets and upon
the issuance of certain assets or securities to holders of our common stock, as applicable. Although we cannot determine at this
time which of these warrants will ultimately be exercised, it is reasonable to assume that such warrants will be exercised only
if the exercise price is below the market price of our common stock. To the extent the warrants are exercised, additional shares
of our common stock will be issued that will be eligible for resale in the public market, which will result in dilution to our
security holders. The issuance of additional securities could also have an adverse effect on the market price of our common stock.



44







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



As of March 24, 2014, our officers and directors
beneficially owned approximately 13.40% of our outstanding common stock. As a result, these stockholders, acting together, may
be able to significantly influence all matters requiring approval by our stockholders, including the election of directors and
the approval of mergers or other business combination transactions. The interests of this group of stockholders may not always
coincide with the interests of other stockholders, and they may act in a manner that advances their best interests and not necessarily
those of other stockholders.



Our (i) current articles of incorporation and
bylaws, (ii) our intended certificate of incorporation and bylaws upon reincorporation in Delaware, (iii) Washington law and,
(iv) upon reincorporation, Delaware law contains provisions that could discourage another company from acquiring us and may prevent
attempts by our stockholders to replace or remove our current management.



Provisions of (i) Washington law, where we
are incorporated, (ii) Delaware law, where we intend to reincorporate, (iii) our current articles of incorporation and bylaws
and (iv) our intended certificate of incorporation and bylaws upon our reincorporation in Delaware may discourage, delay or prevent
a merger or acquisition that stockholders may consider favorable, including transactions in which you might otherwise receive
a premium for your shares. In addition, these provisions may frustrate or prevent any attempts by our stockholders to replace
or remove our current management by making it more difficult for stockholders to replace or remove our board of directors. These
provisions include:



| | · | authorizing the issuance of “blank check” preferred stock without any need for
    action by stockholders;
| | - | ----------------------------------------------------------------------------------------------------------



| | · | providing for a classified board of directors with staggered terms;
| | - | -------------------------------------------------------------------



| | · | requiring supermajority stockholder voting to effect certain amendments to (i) our current
    articles of incorporation and bylaws and (ii) our intended certificate of incorporation and bylaws upon reincorporation in
    Delaware;
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | eliminating the ability of stockholders to call special meetings of stockholders;
| | - | ---------------------------------------------------------------------------------



| | · | prohibiting stockholder action by written consent; and
| | - | ------------------------------------------------------



| | · | establishing advance notice requirements for nominations for election to our board of directors
    or for proposing matters that can be acted on by stockholders at stockholder meetings.
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



In addition, because we are incorporated in
Washington, we are governed by the provisions of Chapter 23B.19 of the Washington Business Corporation Act, or the WBCA, which,
among other things, restricts the ability of shareholders owning ten percent (10%) or more of our outstanding voting stock from
merging or combining with us. Because we are reincorporating in Delaware, we will then be governed by the provisions of Section
203 of the Delaware General Corporation Law, or the DGCL. These provisions may prohibit large stockholders, in particular those
owning fifteen percent (15%) or more of our outstanding voting stock, from merging or combining with us. These provisions could
discourage potential acquisition attempts and could reduce the price that investors might be willing to pay for shares of our
common stock in the future and result in the market price being lower than it would without these provisions.



Although we believe these provisions collectively
provide for an opportunity to receive higher bids by requiring potential acquirors to negotiate with our board of directors, they
would apply even if an offer may be considered beneficial by some shareholders. In addition, these provisions may frustrate or
prevent any attempts by our shareholders to replace or remove our current management by making it difficult for shareholders to
replace members of our board of directors, which is responsible for appointing the members of our management.



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



45







We have never declared or paid cash dividends
on our common stock. We do not anticipate paying any cash dividends on our common stock in the foreseeable future. We currently
intend to retain all available funds and any future earnings to fund the development and growth of our business. As a result,
capital appreciation, if any, of our common stock will be our stockholders’ sole source of gain for the foreseeable future.



Maintaining and improving our financial controls
and the requirements of being a public company may strain our resources, divert management’s attention and affect our ability
to attract and retain qualified board members.



As a public company, we will be subject to
the reporting requirements of the Exchange Act, the Sarbanes-Oxley Act and, if our common stock is listed on an exchange (such
as the NYSE MKT), the rules of such exchange. The requirements of these rules and regulations will increase our legal and financial
compliance costs, make some activities more difficult, time-consuming or costly and may also place undue strain on our personnel,
systems and resources. The Exchange Act will require, among other things, that we file annual, quarterly and current reports with
respect to our business and financial condition.



The Sarbanes-Oxley Act will require, among
other things, that we maintain effective disclosure controls and procedures and internal control over financial reporting. Ensuring
that we have adequate internal financial and accounting controls and procedures in place is a costly and time-consuming effort
that needs to be re-evaluated frequently.



We currently do not have an internal audit
group, and we may need to hire additional accounting and financial staff with appropriate public company experience and technical
accounting knowledge. Implementing any appropriate changes to our internal controls may require specific compliance training for
our directors, officers and employees, entail substantial costs to modify our existing accounting systems, and take a significant
period of time to complete. Such changes may not, however, be effective in maintaining the adequacy of our internal controls,
and any failure to maintain that adequacy, or consequent inability to produce accurate financial statements on a timely basis,
could increase our operating costs and could materially impair our ability to operate our business. Moreover, effective internal
controls are necessary for us to produce reliable financial reports and are important to help prevent fraud.



In addition, our independent registered public
accounting firm did not perform an evaluation of our internal control over financial reporting as of December 31, 2013, December
31, 2012 or December 31, 2011 in accordance with the provisions of the Sarbanes-Oxley Act because no such evaluation was required.
Although not required, our management did review our internal controls for the year ended December 31, 2013 and identified material
weakness in the area of complex and non-routine transactions as further described in Item 9A of this Form 10-K. If we are unable
to successfully remediate any significant deficiency or material weakness in our internal control over financial reporting, identify
any additional significant deficiencies or material weaknesses that may exist, or satisfy the requirements of the Sarbanes-Oxley
Act, the accuracy and timing of our financial reporting may be adversely affected, we may be unable to maintain compliance with
securities law requirements regarding timely filing of periodic reports in addition to applicable stock exchange listing requirements,
and our stock price may decline materially as a result.



In accordance with NYSE MKT rules, we will
be required to maintain a majority independent board of directors. We also expect that the various rules and regulations applicable
to public companies will make it more difficult and more expensive for us to maintain directors’ and officers’ liability
insurance, and we may be required to accept reduced coverage or incur substantially higher costs to maintain coverage. If we are
unable to maintain adequate directors’ and officers’ insurance, our ability to recruit and retain qualified directors,
especially those directors who may be deemed independent for purposes of NYSE MKT rules, and officers will be significantly curtailed.



Compliance with these reporting rules, Sarbanes-Oxley
Act and NYSE MKT requirements may require us to build out our accounting and finance staff. We may need to expand our accounting
and financing staff, and our failure to adequately do so would harm our ability to comply with the requirements listed above.



46







If securities or industry analysts do not publish
research or publish unfavorable research about our business, our stock price and trading volume could decline.



The trading market for our common stock will
depend in part on the research and reports that securities or industry analysts publish about us or our business. We currently
have one security analyst and may never obtain additional research coverage by other securities and industry analysts. If no additional
securities or industry analysts commence coverage of our company, the trading price for our stock could be negatively impacted.
If we obtain additional securities or industry analyst coverage and if one or more of the analysts who covers us downgrades our
stock or publishes inaccurate or unfavorable research about our business, our stock price would likely decline. If one or more
of these analysts ceases coverage of us or fails to publish reports on us regularly, demand for our stock could decrease, which
could cause our stock price and trading volume to decline.



Future sales of our common stock or securities
convertible into our common stock may depress our stock price.



Sales of a substantial number of shares of
our common stock or securities convertible into our common stock in the public market could occur at any time. These sales, or
the perception in the market that the holders of a large number of shares intend to sell shares, could reduce the market price
of our common stock. Moreover, we also intend to register all shares of common stock that we may issue under our equity compensation
plans. Once we register these shares, they can be freely sold in the public market upon issuance, subject to the lock-up agreements
contained in the relevant agreements.



If a large number of shares of our common
stock or securities convertible into our common stock are sold in the public market after they become eligible for sale, the sales
could reduce the trading price of our common stock and impede our ability to raise future capital.



Trading of our stock is restricted by the SEC’s
“penny stock” regulations and certain FINRA rules, which may limit a stockholder’s ability to buy and sell our
common stock.



Our securities are covered by certain “penny
stock” rules, which impose additional sales practice requirements on broker-dealers who sell low-priced securities to persons
other than established customers and accredited investors. For transactions covered by these rules, a broker-dealer must make
a special suitability determination for the purchaser and have received the purchaser’s written consent to the transaction
prior to sale, among other things. In addition, the penny stock rules require a broker-dealer, before effecting a transaction
in a penny stock not otherwise exempt from the rules, to deliver a standardized risk disclosure document prepared by the SEC that
provides information about penny stocks and the nature and level of risks in the penny stock market. The broker-dealer also must
provide the customer with current bid and offer quotations for the penny stock, the compensation of the broker-dealer and its
salesperson in the transaction, and monthly account statements showing the market value of each penny stock held in the customer’s
account. The bid and offer quotations, and the broker-dealer and salesperson compensation information, must be given to the customer
orally or in writing before effecting the transaction, and must be given to the customer in writing before or with the customer’s
confirmation. These rules may affect the ability of broker-dealers and holders to sell our common stock and may negatively impact
the level of trading activity for our common stock. To the extent our common stock remains subject to the penny stock regulations,
such regulations may discourage investor interest in and adversely affect the market liquidity of our common stock.



The Financial Industry Regulatory Authority,
or FINRA, has adopted rules that require that in recommending an investment to a customer, a broker-dealer must have reasonable
grounds for believing that the investment is suitable for that customer. Prior to recommending speculative low priced securities
to their non-institutional customers, broker-dealers must make reasonable efforts to obtain information about the customer’s
financial status, tax status, investment objectives and other information. Under interpretations of these rules, FINRA believes
that there is a high probability that speculative low priced securities will not be suitable for at least some customers. FINRA
requirements make it more difficult for broker-dealers to recommend that their customers buy our common stock, which may limit
your ability to buy and sell our stock and have an adverse effect on the market for our shares.



47







We are an “emerging growth company”
and we cannot be certain if the reduced disclosure requirements applicable to “emerging growth companies” will make
our common stock less attractive to investors.



We are an “emerging growth company,”
as defined under the JOBS Act. For so long as we are an “emerging growth company,” we intend to take advantage of
certain exemptions from reporting requirements that are applicable to other public companies that are not “emerging growth
companies” including, but not limited to, compliance with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley
Act, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions
from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute
payments not previously approved.



We could be an “emerging growth company”
for up to five years, although we may lose such status earlier, depending on the occurrence of certain events. We will remain
an “emerging growth company” until the earliest to occur of (i) the last day of the fiscal year (a) following the
fifth anniversary of our initial public offering, (b) in which we have total annual gross revenue of at least $1.0 billion or
(c) in which we are deemed to be a “large accelerated filer” under the Securities Exchange Act of 1934, which we refer
to as the Exchange Act, which means that the market value of our common stock that is held by non-affiliates exceeds $700 million
as of the prior June 30, and (ii) the date on which we have issued more than $1.0 billion in non-convertible debt securities during
the prior three-year period.



We cannot predict if investors will find our
common stock less attractive or our company less comparable to certain other public companies because we will rely on these exemptions.
If some investors find our common stock less attractive as a result, there may be a less active trading market for our common
stock and our stock price may be more volatile.



Under the JOBS Act, “emerging growth
companies” can delay adopting new or revised accounting standards issued subsequent to the enactment of the JOBS Act until
such time as those standards apply to private companies. We have irrevocably elected not to avail ourselves of this exemption
from new or revised accounting standards, and, therefore, will be subject to the same new or revised accounting standards as other
public companies that are not “emerging growth companies.”



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



Not applicable to the Company as a smaller reporting company.



|Item 2. | PROPERTIES.
|------- | -----------



Our principal offices occupy approximately
471 square feet of leased office space pursuant to a lease agreement that expires in June 2014 and is located at 4870 Sadler Road,
Suite 300, Glen Allen, Virginia 23060. We also lease approximately 708 square feet of lab space in Richmond, Virginia, approximately
153 square feet of office space in Carlsbad, California, approximately 5,000 square feet of lab space in Brookvale, Australia,
approximately 2,672 square feet of lab space in Bedford,United Kingdom, and approximately 4,000 square feet of laboratory and
office space in Ljubljana-Dobrunje, Slovenia. We believe our facilities are adequate for our current and near-term needs.



|Item 3. | LEGAL PROCEEDINGS.
|------- | ------------------



From time to time we are involved in legal
proceedings or subject to claims arising in the ordinary course of our business. Although the results of litigation and claims
cannot be predicted with certainty, we do not believe we are a party to any legal proceedings that, if determined adversely to
us, would individually or taken together have a material adverse effect on our business, operating results, financial condition
or cash flows. Regardless of the outcome, litigation can have an adverse impact on us because of defense and settlement costs,
diversion of management resources and other factors.



|Item 4. | Mine Safety Disclosures
|------- | -----------------------



Not applicable.



48







PART II



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



Our shares of common stock are quoted on the
OTC Pink market under the symbol “APHB.” Our shares were previously quoted under the symbol “TGEN.” On
February 22, 2011, in connection with our name change to AmpliPhi Biosciences Corporation, our quotation symbol was changed to
“APHB.”



The following table sets forth the range of
reported high and low closing bid quotations for our common stock for the fiscal quarters indicated. These quotations reflect
inter-dealer prices, without retail markup, markdown or commission, and may not represent actual transactions. Consequently, the
information provided below may not be indicative of our common stock price under different conditions.



|                                            |  | High |      |  | Low |  
|------------------------------------------- |  | ---- | ---- |  | --- | -
|Fiscal Year 2014                            |  |      |      |  |     |  
|Period from April 1, 2014 to April 14, 2014 |  | $    | 0.58 |  |     | $
|First Quarter ended March 31, 2014          |  | $    | 0.74 |  |     | $
|Fiscal Year 2013                            |  |      |      |  |     |  
|Fourth Quarter ended December 31, 2013      |  | $    | 0.59 |  |     | $
|Third Quarter ended September 30, 2013      |  | $    | 0.71 |  |     | $
|Second Quarter ended June 30, 2013          |  | $    | 0.20 |  |     | $
|First Quarter ended March 31, 2013          |  | $    | 0.18 |  |     | $
|Fiscal Year 2012                            |  |      |      |  |     |  
|Fourth Quarter ended December 31, 2012      |  | $    | 0.22 |  |     | $
|Third Quarter ended September 30, 2012      |  | $    | 0.20 |  |     | $
|Second Quarter ended June 30, 2012          |  | $    | 0.23 |  |     | $
|First Quarter ended March 31, 2012          |  | $    | 0.24 |  |     | $
|Fiscal Year 2011                            |  |      |      |  |     |  
|Fourth Quarter ended December 31, 2011      |  | $    | 0.27 |  |     | $
|Third Quarter ended September 30, 2011      |  | $    | 0.29 |  |     | $
|Second Quarter ended June 30, 2011          |  | $    | 0.39 |  |     | $
|First Quarter ended March 31, 2011          |  | $    | 0.17 |  |     | $



Holders of Common Stock



As of March 24, 2014, there were
317 holders of record of our common stock. As of such date, the number of shares of our common stock outstanding is
271,135,342, which consists of 182,535,562 shares of common stock outstanding as of March 24, 2014, and 88,599,780 shares of
common stock issuable upon conversion of all outstanding shares of Series B Redeemable Convertible Preferred Stock as of
March 24, 2014 (assuming a conversion ratio equal to ten (10) common shares for each share of Series B Redeemable Convertible
Preferred Stock).



Dividends



We have never declared or paid any cash dividends
or distributions on our common stock and currently do not plan to declare cash dividends on shares of our common stock in the
foreseeable future. We expect that we will retain all of our available funds and future earnings, if any, for use in the operation
and expansion of our business. Subject to the foregoing, the payment of cash dividends in the future, if any, will be at the discretion
of our board of directors and will depend upon such factors as earnings levels, capital requirements, restrictions imposed by
applicable law, our overall financial condition and any other factors deemed relevant by our board of directors.



49







Securities Authorized for Issuance under Equity Compensation
Plans



In October 2012, our board of directors approved
and adopted the 2012 Stock Incentive Plan, which we refer to as the 2012 Plan. Under the 2012 Plan, we are authorized to issue
up to 35,000,000 shares of our common stock in stock incentive awards to employees, directors and consultants.



In March 2009, our board of directors and
shareholders adopted the 2009 Stock Incentive Plan, which we refer to as the 2009 Stock Incentive Plan. Under the 2009 Plan, we
are authorized to issue up to 4,200,000 shares of our common stock in stock incentive awards to employees, directors and consultants.



In December 2013, our board of directors adopted
the 2013 Plan. Under the 2013 Plan, we are authorized to issue up to 40,000,000 shares of our common stock in stock incentive
awards to employees, directors and consultants. Our shareholders approved the 2013 Plan in February 2014.



The following table provides information as
of December 31, 2013 with respect to our equity compensation plans:



|Plan Category                                                     |  | Number of securities
     to be issued upon  exercise of outstanding options, warrants and rights |            |  | Weighted-  average
    exercise price of outstanding options, warrants and rights |   |      | Number of securities
    remaining available for future issuance under equity compensation plans (excluding securities reflected in
    column (a)) | 
|----------------------------------------------------------------- |  | ------------------------------------------------------------------------------------------------- | ---------- |  | --------------------------------------------------------------------------------- | - | ---- | --------------------------------------------------------------------------------------------------------------------------------------------------- | 
|                                                                  |  | (a)                                                                                               |            |  | (b)                                                                               |   |      | (c)                                                                                                                                                 | 
|Equity compensation
    plansapproved by security holders (1)     |  |                                                                                                   | 166,000    |  |                                                                                   | $ | 0.90 |                                                                                                                                                     | 
|Equity compensation plans
    notapproved by security holders (2) |  |                                                                                                   | 25,555,000 |  |                                                                                   | $ | 0.19 |                                                                                                                                                     | 
|Total                                                             |  |                                                                                                   | 25,721,000 |  |                                                                                   | $ | 0.20 |                                                                                                                                                     | 



| | (1) | The 2009 Plan.
| | --- | --------------



| | (2) | The 2012 Plan.
| | --- | --------------



Recent Sales of Unregistered Securities



On December 16, 2013, we entered into subscription
agreements to issue an aggregate amount of 72,007,000 shares of common stock for an aggregate purchase price of approximately
$18 million as part of a private placement. The offers were, and, when completed, the sales and issuances are expected to be,
deemed to be exempt from registration under the Securities Act. The purchasers of securities in each of these transactions acquired
the securities for investment only and not with a view to or for sale in connection with any distribution thereof and appropriate
legends were affixed to the securities issued in these transactions. Each of such purchasers was an “accredited investor”
under Rule 506 of Regulation D or not a “U.S. person” under Regulation S.



On June 26, 2013, we completed a private
placement of convertible preferred stock and warrants to purchase common stock with gross proceeds of $7.0 million through
the sale of shares of our newly-created Series B Redeemable Convertible Preferred Stock. As part of the same transaction,
approximately $5.5 million in outstanding convertible notes were converted into shares of Series B Redeemable Convertible
Preferred Stock and warrants to purchase common stock. On July 15, 2013, we completed a second closing in which we converted
approximately $0.8 million of outstanding convertible notes into Series B Redeemable Convertible Preferred Stock and warrants
to purchase common stock. The financing was led by life-sciences investors RA Capital Management and Third Security, LLC,
with participation from BioScience Managers Pty Ltd.



50







Under the terms of the financing, we
issued an aggregate amount of approximately 10 million shares of the Series B Redeemable Convertible Preferred Stock for an
aggregate purchase price of approximately $13.3 million (including the conversion of approximately $6.3 million of
outstanding convertible notes). Each share of Series B Redeemable Convertible Preferred Stock is convertible into 10 shares
of common stock. Additionally, we issued warrants to purchase an aggregate of up to approximately 25.0 million shares of
common stock at an exercise price of $0.14 per share. The offers, sales and issuances of Series B Redeemable Convertible
Preferred Stock and warrants to purchase common stock were deemed to be exempt from registration under the Securities Act.
The purchasers of securities in each of these transactions acquired the securities for investment only and not with a view to
or for sale in connection with any distribution thereof and appropriate legends were affixed to the securities issued in
these transactions. Each of such purchasers was an “accredited investor” under Rule 506 of Regulation D or not
a “U.S. person” under Regulation S.



On March 29, 2013, pursuant to a Stock Issuance
Agreement, which we refer to as the Issuance Agreement, we issued 24,000,000 shares of our common stock, or 26.4% of our total
outstanding capital stock after such issuance, to Intrexon, then a privately held Virginia corporation, which subsequently became
publicly traded, that develops technology intended to provide synthetic control over cellular functions, in consideration of Intrexon’s
concurrent entry into the ECC with us to develop new bacteriophage-based therapies to target specific antibiotic-resistant infections.
The Issuance Agreement also provides for the potential future issuance by us to Intrexon of shares of our common stock having
a fair market value of up to $7,500,000, depending upon the reaching of certain milestones under the ECC. The issuance of shares
of common stock under the Issuance Agreement was deemed to be exempt from registration under the Securities Act as Intrexon was
an “accredited investor” under Rule 506 of Regulation D.



Between April 13, 2012 and May 13, 2013, we
sold convertible notes to Pendinas Limited in varying principal amounts for an aggregate total of $2,750,000. Additionally, we
issued warrants to purchase an aggregate of up to approximately 7.0 million shares of common stock at an exercise price of $0.14
per share. All such convertible notes have been converted as a result of the completion of our private placement of convertible
preferred stock, as of July 15, 2013. The offers, sales and issuances of convertible notes and warrants to purchase common stock
were deemed to be exempt from registration under the Securities Act. Pendinas Limited was both an “accredited investor”
under Rule 506 of Regulation D and not a “U.S. person” under Regulation S.



Between November 23, 2010 and February 1,
2012, we sold convertible notes to a total of twenty-two different parties in varying principal amounts for an aggregate total
of $1,872,462. All such convertible notes have been converted as a result of the completion of our private placement of convertible
preferred stock, as of July 15, 2013. The offer, sales and issuances of convertible notes were deemed to be exempt from registration
under the Securities Act. Each of the purchasers was either an “accredited investor” under Regulation D or not a “U.S.
person” under Regulation S.



In November 2012, under the terms of our acquisition
of SPH, we issued 40,000,000 shares of our common stock with 20,000,000 of those shares issued directly to the selling stockholders
of SPH upon the closing of the acquisition, and the remaining 20,000,000 shares issued and held in escrow. The issuance of common
stock was deemed to be exempt from registration under the Securities Act. Each of SPH’s selling stockholders and each of
the recipients of such shares was either an “accredited investor” under Regulation D or not a “U.S. person”
under Regulation S.



In January 2011, under the terms of our acquisition
of Biocontrol, we issued 22,586,073 shares of our common stock to the shareholders of Biocontrol with a total fair value of approximately
$8.6 million as of January 6, 2011, resulting in Biocontrol’s former shareholders owning approximately 50% of our outstanding
equity securities at the time. The issuance of common stock was deemed to be exempt from registration under the Securities Act.
Each of Biocontrol’s former shareholders was not a “U.S. person” under Regulation S.



|Item 6. | SELECTED FINANCIAL DATA
|------- | -----------------------



We are a smaller reporting company as defined
by Rule 12b-2 of the Exchange Act and are not required to provide the information required under this item.



51







|Item 7. | MANAGEMENT’S DISCUSSION AND ANALYSIS OF
    FINANCIAL CONDITION AND RESULTS OF OPERATIONS
|------- | -----------------------------------------------------------------------------------------



MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS.



You should read the following discussion and
analysis of our financial condition and results of operations in conjunction with the consolidated financial statements and the
related notes contained elsewhere in this Annual Report. Some of the information contained in this discussion and analysis are
set forth elsewhere in this Annual Report, including information with respect to our plans and strategy for our business and related
financing, includes forward-looking statements that involve risks and uncertainties. See “Special Note Regarding Forward-Looking
Statements.” Our actual results may differ substantially from those referred to herein due to a number of factors, including
but not limited to risks described in the section entitled “Risk Factors” and elsewhere in this Annual Report.



Restatement



As discussed in the “Explanatory
Note Regarding Restatement” and Note 14 to the Consolidated Financial Statements included in this Annual Report on Form
10-K, we are amending and restating our audited consolidated financial statements and related disclosures for the years ended
December 31, 2013 and December 31, 2012.



The following discussion
and analysis of our financial condition and results of operations incorporates the restated amounts. For this reason, the data
set forth in this section may not be comparable to discussion and data in our previously filed Registration Statements on Form
10 or Form S-1 for the fiscal year ended December 31, 2012.



Overview



AmpliPhi Biosciences is a biotechnology company
focused on the discovery, development and commercialization of novel phage therapeutics. Our proprietary pipeline is based on
the use of bacteriophages, a family of viruses that infect only bacteria. Phages have powerful and highly selective mechanisms
of action that permit them to target and kill specific bacterial pathogens, including the so-called multi-drug-resistant (MDR)
or “Superbug” strains.



We are combining our proprietary approach
and expertise in identifying, characterizing and developing naturally occurring bacteriophages with that of our collaboration
partners in bacteriophage biology, drug engineering, development and manufacturing, to develop second-generation bacteriophage
products. We believe that phages represent a promising means to treat bacterial infections, especially those that have developed
resistance to current medicines.



Our lead programs consist of three product
candidates: AmpliPhage-001 for the treatment of P. aeruginosa lung infections in cystic fibrosis (CF) patients;
AmpliPhage-002, for the treatment of methicillin-resistant S. aureus (MRSA) infections; and AmpliPhage-004 for the treatment
of C. difficile infections.



We have incurred net losses since our
inception. Our operations to date have been limited to research and development and raising capital. Since November 2010, we
have raised approximately $5.6 million through the sale and issuance of convertible notes and warrants to purchase common
stock. In June and July of 2013, we completed a private placement of shares of our Series B Redeemable Convertible Preferred
Stock and warrants to purchase common stock, which raised approximately $7.0 million in addition to converting approximately
$6.3 million in outstanding convertible notes. In December 2013, we completed a private placement of shares of our common
stock, which raised approximately $18 million, prior to commissions. To date, we have not generated any revenue and have
primarily financed our operations through the sale and issuance of convertible notes and the private placement of our equity
securities. As of December 31, 2013, we had a deficit accumulated of $385.1 million. We recorded annual net losses of $64.6
million in 2013 and $1.1 million in 2012. We anticipate that a substantial portion of our capital resources and efforts in
the foreseeable future will be focused on completing the development and obtaining regulatory approval of our product
candidates.



52







We expect our research and development expenses
to increase as we pursue regulatory approval for our product candidates. We also expect to incur additional expenses associated
with operating as a public company. As a result, we expect to continue to incur significant and increasing operating losses at
least for the next several years. We do not expect to generate product revenue unless and until we successfully complete development
and obtain marketing approval for at least one of our product candidates.



We currently expect to use our existing cash
and cash equivalents for the continued research and development of our product candidates and for working capital and other general
corporate purposes.



We may also use a portion for the potential
acquisition of, or investment in, product candidates, technologies, formulations or companies that complement our business, although
we have no current understandings, commitments or agreements to do so. We expect that these funds will not be sufficient to enable
us to complete all necessary development of any potential product candidates. Accordingly, we will be required to obtain further
funding through other public offerings, debt financing, collaboration and licensing arrangements or other sources. Adequate additional
funding may not be available to us on acceptable terms, or at all. If we are unable to raise capital when needed or on attractive
terms, we would be forced to delay, reduce or eliminate our research and development programs.



Financial Operations Overview



Revenue



To date, we have not generated any revenue
from the sale of our product candidates and do not expect to generate any revenue from the sale of our product candidates in the
near term. In the last two years, we recognized $0.7 million in revenue related to license agreements and grants from governments
and academic institutions. These revenues were used in our new focus, the development of phages.



Research and Development Expenses



Research and development costs consist of
the costs associated with our research and discovery activities, conducting clinical trials, manufacturing development efforts
and activities related to regulatory filings. Our research and development expenses consist of salaries, non-cash stock-based
compensation, costs of outside collaborators and outside services, royalty and license costs and facility, occupancy and utility
expenses. We expense research and development costs as incurred. We expect annual research and development expenses will increase
significantly in the future as we progress with development. In the last two years, we incurred an aggregate of $8.0 million on
research and development expenses, including non-cash stock-based compensation expense.



General and Administrative Expenses



General and administrative expenses consist
primarily of salaries and related costs for our personnel in the executive, finance, patent, accounting and other administrative
functions, including non-cash stock-based compensation, as well as consulting costs for functions for which we either do not or
only partially staff internally, including public relations, market research and recruiting. Other costs include professional
fees for legal and accounting services, insurance and facility costs. In the last two years, we incurred an aggregate of $9.2
million in general and administrative expenses, including non-cash stock-based compensation expense.



Interest Income (Expense)



Interest income consists of interest earned
on our cash and cash equivalents and is not considered significant to our financial statements. We expect our interest income
to increase in the future as we raise further capital to fund our operations.



53







Critical Accounting Policies and Use of Estimates



Our management’s discussion and analysis
of our financial condition and results of operations are based on our consolidated financial statements, which have been prepared
in accordance with U.S. generally accepted accounting principles. The preparation of these consolidated financial statements requires
us to make estimates and judgments that affect the reported amounts of assets, liabilities, and expenses and the disclosure of
contingent assets and liabilities in our consolidated financial statements. On an ongoing basis, we evaluate our estimates and
judgments, including those related to accrued expenses and stock-based compensation. We base our estimates on historical experience,
known trends and events, and various other factors that are believed to be reasonable under the circumstances, the results of
which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from
other sources. Actual results may differ from these estimates under different assumptions or conditions.



Goodwill



Costs of investments in purchased companies
in excess of the underlying fair value of net assets at the date of acquisition are recorded as goodwill and assessed annually
for impairment. If considered impaired, goodwill will be written down to fair value and a corresponding impairment loss recognized.
As of December 31, 2013, we have recorded goodwill of $7.6 million related to the 2012 acquisition of SPH’s know-how and
phage libraries and the 2011 acquisition of Biocontrol’s patents and phage library. In management’s opinion, no goodwill
has been impaired as of December 31, 2013.



Research and Development Costs



In Process Research & Development (IPR&D)
assets represent capitalized incomplete research projects that the Company acquired through business combinations. Such assets
are initially measured at their acquisition date fair values. The fair value of the research projects is recorded as intangible
assets on the consolidated balance sheet rather than expensed regardless of whether these assets have an alternative future use.
The amounts capitalized are being accounted for as indefinite-lived intangible assets, subject to impairment testing until completion
or abandonment of research and development efforts associated with the projects. Upon successful completion of each project, the
Company will make a determination as to the then remaining useful life of the intangible asset and begin amortization. The Company
tests its indefinite-lived intangibles, including IPR&D assets, for impairment at least quarterly. As of December 31, 2013,
we have recorded IPR&D of $12.5 million due to the 2012 acquisition of SPH’s know-how and phage libraries and the 2011
acquisition of Biocontrol’s know-how and phage library. In management’s opinion, no IPR&D has been impaired as
of December 31, 2013.



Stock-Based Compensation Expenses



We account for stock options and restricted
stock units related to our Stock Incentive Plans under the provisions of ASC 718, which requires the recognition of the fair value
of stock-based compensation. The fair value of stock options and restricted stock units was estimated using a Black-Scholes option
valuation model. This model requires the input of subjective assumptions in implementing ASC 718, including expected dividend,
expected life, expected volatility and forfeiture rate of each award, as well as the prevailing risk-free interest rate and the
fair value of the underlying common stock on the date of grant. The fair value of equity-based awards is amortized over the vesting
period of the award, and we have elected to use the straight-line method of amortization. Actual results could differ from our
assumptions, which may cause us to record adjustments to increase or decrease compensation expense, in future periods. The assumptions
used in the Black-Scholes option valuation model for the years ended December 31, 2013 and 2012 are set forth below.



The following are the assumptions for the
periods in which we granted stock options:



| | · | Expected Dividend:  We do not anticipate any dividends.
| | - | -------------------------------------------------------



| | · | Expected Life:  The expected life represents the period that we expect
    our stock-based awards to be outstanding. We determine life based on historical experience and vesting schedules of similar
    awards.
| | - | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | Expected Volatility:  Our expected volatility represents the weighted average
    historical volatility of the shares of our common stock for the most recent four-year and five-year periods.
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | Risk-Free Interest Rate:  We base the risk-free interest rate used on the
    implied yield currently available on U.S. Treasury zero-coupon issues with an equivalent remaining term. Where the expected
    term of our stock-based awards does not correspond with the terms for which interest rates are quoted, we perform a straight-line
    interpolation to determine the rate from the available term maturities.
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



54







| | · | Forfeiture Rate:  We apply an estimated forfeiture rate that is derived
    from historical forfeited shares. If the actual number of forfeitures differs from our estimates, we may record additional
    adjustments to compensation expense in future periods.
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



The weighted-average assumptions used in the
Black-Scholes option pricing model to determine the fair value of the stock option grants were as follows:



|                         |  | Years Ended December
    31, |      
|------------------------ |  | ---------------------------- | -----
|                         |  | 2013                         |      
|Risk-free interest rate  |  |                              | 1.13 
|Expected volatility      |  |                              | 160.9
|Expected term (in years) |  |                              | 4.0  
|Expected dividend yield  |  |                              | 0.0  



Warrant and Preferred Shares Conversion Feature Liability



We account for warrants and the preferred
shares conversion feature with anti-dilution (“down-round”) provisions under the guidance of ASC 815, Derivatives
and Hedging and Emerging Issue Task Force Statement 07-5: Determining Whether an Instrument (or Embedded Feature) Is Indexed to
an Entity's Own Stock, which require the warrants and the preferred shares conversion feature to be recorded as a liability and
adjusted to fair value in each reporting period. We estimate the fair values of these securities using a Monte Carlo valuation
model.



Accounting for Income Taxes



Our income tax policy records the estimated
future tax effects of temporary differences between the tax basis of assets and liabilities and amounts reported in the accompanying
balance sheets, as well as operating loss and tax credit carry-forwards. We have recorded a full valuation allowance to reduce
our deferred tax assets, as based on available objective evidence; it is more likely than not that the deferred tax assets will
not be realized. In the event that we were to determine that we would be able to realize our deferred tax assets in the future,
an adjustment to the deferred tax assets would increase net income in the period such determination was made.



Recent Accounting Pronouncements



In September 2011, the FASB issued Accounting
Standards Update (ASU) no. 2011-08, Intangibles — Goodwill and Other (Topic 350): Testing Goodwill for Impairment
that simplifies how public and nonpublic entities test goodwill for impairment. The amendments permit an entity to first assess
qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying
amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test described in ASC Topic
350. The more-likely-than-not threshold is defined as having a likelihood of more than 50%. The guidance also includes examples
of the types of events and circumstances to consider in conducting the qualitative assessment. The amendments will be effective
for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. We elected to early
adopt this standard and used these new guidelines in assessing goodwill impairment for the consolidated financial statements.



On May 16, 2013, the FASB issued a proposed
Accounting Standards Update, Leases (Topic 842): a revision of the 2010 proposed Accounting Standards Update, Leases (Topic 840).
The proposal affects operating leases, especially with properties, and requires lessees to recognize assets and liabilities arising
from those leases. The draft also proposes changes in accounting for purchase options and contingent rentals, which would affect
the measurement of assets and liabilities for capital leases. An entity will be required to recognize all outstanding leases within
the scope of the draft as of the date of initial application using a simplified retroactive approach. The exposure draft proposes
that lessee and lessors should apply a right-of-use model in accounting for all leases, with few exceptions. An entity has a right
to use an asset if it has control over the asset which is fulfilled if one of the three conditions outlined in the document are
met. For leases within the scope of the draft, a lessee would recognize a “right of use” asset representing its right
to use and the liability to make lease payments. A lessor would recognize an asset representing its right to receive lease payments
using a performance obligation approach or a derecognition approach depending on its exposure to risks. There are numerous disclosures
that would also be required such as a reconciliation of the opening and closing balances for the leased asset and liabilities.
This proposed guidance could impact all companies that participate in leasing activities. We do not believe this proposed accounting
standard will have a significant impact on the Company’s future financial reporting.



55







JOBS Act



In April 2012, the JOBS Act was signed into
law. The JOBS Act contains provisions that, among other things, reduce certain reporting requirements for an “emerging growth
company.” As an “emerging growth company,” we are electing not to take advantage of the extended transition
period afforded by the JOBS Act for the implementation of new or revised accounting standards, and as a result, we will comply
with new or revised accounting standards on the relevant dates on which adoption of such standards is required for non-emerging
growth companies. Section 107 of the JOBS Act provides that our decision not to take advantage of the extended transition period
is irrevocable. In addition, we are in the process of evaluating the benefits of relying on the other exemptions and reduced reporting
requirements provided by the JOBS Act. Subject to certain conditions set forth in the JOBS Act, if as an “emerging growth
company” we choose to rely on such exemptions, we may not be required to, among other things, (i) provide an auditor’s
attestation report on our system of internal controls over financial reporting pursuant to Section 404, (ii) provide all of the
compensation disclosure that may be required of non-emerging growth public companies under the Dodd-Frank Wall Street Reform and
Consumer Protection Act, (iii) comply with any requirement that may be adopted by the Public Company Accounting Oversight Board
regarding a supplement to the auditor’s report providing additional information about the audit and the financial statements
(auditor discussion and analysis) and (iv) disclose certain executive compensation-related items such as the correlation between
executive compensation and performance and comparisons of the Chief Executive Officer’s compensation to median employee
compensation. These exemptions will apply for a period of five years following the completion of our initial public offering or
until we no longer meet the requirements of being an “emerging growth company,” whichever is earlier.



Results of Operations



Comparison of the Years Ended December 31, 2013 and 2012



Revenue



For the years ended December 31, 2013 and
2012, we recognized $0.1 million and $0.7 million in revenue, respectively. For the years ended December 31, 2013 and 2012, we
earned $0.1 million and $0.6 million of revenue through sublicensing agreements involving our former gene therapy program, respectively.
For the year ended December 31, 2012, we also earned $0.1 million in grant revenue.



Research and Development



Research and development expenses were $6.5
million for the year ended December 31, 2013, compared to $1.5 million for the year ended December 31, 2012. The $5.0 million
increase in expenses is due to an increase in discovery, laboratory, nonclinical testing, research and development collaborations,
consulting and clinical development planning expenses for all of our product candidates. Research and development expenses are
expected to increase in 2014 compared to 2013 as we plan to continue devoting substantial resources to research and development
in future periods as we start clinical trials and continue our discovery efforts.



General and Administrative



General and administrative expenses were $6.0
million for 2013, compared to $3.2 million for 2012. The $2.8 million increase is due to $0.7 million in placement agent fees
associated with the June 2013 Series B Preferred Shares placement, $0.7 million in higher legal expenses due to preparation to
become a public company, and $1.4 million in higher staffing and outside consulting expenses (including non-cash compensation
expense related to options granted to Company executives). We currently expect our general and administrative expenses to increase
in 2014 compared to 2013 due to the costs associated with being a public company.



56







Discontinued Operations



In June 2012, we sold certain assets used
in our gene therapy business including process development, quality control, quality assurance, manufacturing, and bioanalytical
functions for $3.1 million. In addition to this cash consideration, we may receive a long-term royalty of 1.75% on all product
sales. This royalty may be completely canceled at any time by a one-time payment of $1.8 million.



Other Income (Expense)



Loss from derivative liabilities was $49.3
million in 2013. The loss was primarily attributable to an increase in the price of common shares during the period.



The Company recorded amortization of note
discount of $2.6 million in 2013 related to the conversion of the convertible notes into Series B Redeemable Convertible Preferred
Stock in 2013.



Interest expense on its convertible notes
was $0.2 million in 2013 compared to $0.3 million for 2012. The decrease was due to conversion of the convertible notes into Series
B preferred Shares in June and July 2013.



Income Taxes



We incurred net operating losses for
the years ended December 31, 2013 and 2012 and, accordingly, we did not pay any federal or state income taxes. As of December
31, 2013, we had approximately $170.5 million in U.S., Australian and UK gross net operating loss carry-forwards and
research tax credit carry-forwards of approximately $3.7 million. The carry-forwards began to expire in 2012. Our gross net
operating loss carry-forwards are subject to certain limitations on annual utilization as a result of changes in ownership of
the Company, as defined by federal and state tax laws.



Net Operating Losses



We have not recorded a benefit from our net
operating loss or research credit carry-forwards because we believe that it is uncertain that we will have sufficient income from
future operations to realize the carry-forwards prior to their expiration. Accordingly, we have established a 100% valuation allowance
against the deferred tax asset arising from the carry-forwards.



Liquidity and Capital Resources



We have incurred net losses since inception
through December 31, 2013 of $385.1 million, of which $315.5 million was incurred as a result of the Company’s prior focus
on gene therapy in fiscal years 2010 and earlier. We have not generated any product revenues and do not expect to generate revenue
from the sale of product candidates in the near term.



We had cash of $20.4 million and $0.9 million
at December 31, 2013 and 2012, respectively. Net cash used in operating activities for the years ended December 31, 2013 and 2012
was $6.3 million and $4.3 million, respectively. For the year ended December 31, 2013, cash used in operations was attributable
to the net loss for the year after adding back non-cash charges for loss on derivative liabilities, shares issued for technology
access fee, amortization of loan discount, fair market value of warrants issued as June and July investment fees, stock-based
compensation expense, and depreciation expenses. For the year ended December 31, 2012, cash used in operations was attributable
to the net loss for the year after adding back non-cash charges for stock-based compensation expense, depreciation expenses and
a loss on disposal of equipment, which were partially offset by a decrease in accrued liabilities and an increase in receivables.
Net cash used in investing activities for the year ended December 31, 2013 was $0.1 million due to purchases of equipment. Net
cash provided by investing activities for the year ended December 31, 2012 was $3.1 million due to the sale of assets from discontinued
operations slightly offset by purchases of property and equipment. Net cash provided by financing activities was $25.9 million
for the year ended December 31, 2013, due to the December 2013 private placement, the Series B financing and convertible loan
notes. Net cash provided by financing activities was $1.0 million for the year ended December 31, 2012, due to proceeds from convertible
notes. We expect 2014 cash requirements to be in the range of $15.0 million to $17.0 million. We believe that our cash as of December
31, 2013, will be sufficient to fund our projected operating requirements into the first quarter of 2015.

57







We expect to need to raise additional capital
or incur indebtedness to continue to fund our future operations. We may seek to raise capital through a variety of sources, including:



| | · | the public equity market;
| | - | -------------------------



| | · | private equity financing;
| | - | -------------------------



| | · | collaborative arrangements;
| | - | ---------------------------



| | · | licensing arrangements; and/or
| | - | ------------------------------



| | · | public or private debt.
| | - | -----------------------



Our ability to raise additional funds will
depend on our clinical and regulatory events, our ability to identify promising in-licensing opportunities and factors related
to financial, economic and market conditions, many of which are beyond our control. We cannot be certain that sufficient funds
will be available to us when required or on satisfactory terms. If adequate funds are not available, we may be required to significantly
reduce or refocus our operations or to obtain funds through arrangements that may require us to relinquish rights to certain of
our products, technologies or potential markets, any of which could delay or require that we curtail our development programs
or otherwise have a material adverse effect on our business, financial condition and results of operations. To the extent that
additional capital is raised through the sale of equity or convertible debt securities, the issuance of such securities would
result in ownership dilution to our existing stockholders.



If we are unable to secure additional financing
on a timely basis or on terms favorable to us, we may be required to cease or reduce certain research and development projects,
to sell some or all of our technology or assets or to merge all or a portion of our business with another entity. Insufficient
funds may require us to delay, scale back or eliminate some or all of our activities, and if we are unable to obtain additional
funding, there is uncertainty regarding our continued existence.



Contractual Obligations and Commitments



In February 2011, the Company entered into
an agreement with Virginia Biotechnology Research Partnership Authority for Richmond, Virginia laboratory space. This agreement
has a contractual expiration date of February 29, 2012 at which time it converted to a rolling three-month lease. At December
31, 2013, the Company’s minimum payment commitment for the Richmond, Virginia laboratory space was $4,800.



In December 2011, the Company entered into
an agreement with Nevis Limited and Charter Limited for laboratory space in Bedfordshire, United Kingdom. This agreement has a
minimum period of 3 years and a contractual expiration date of December 8, 2016. At December 31, 2013, the Company’s minimum
payment commitment for the Bedfordshire laboratory space was $127,000.



In February 2013, we entered into an agreement
with Office Suites Plus (now Regus Management Group, LLC) for office space in Glen Allen, Virginia. The agreement has a minimum
period of one year ending February 28, 2014, at which time it was extended through June 2014, with a monthly cost of $2,555. At
December 31, 2013, our minimum payment commitment for the Glen Allen space was $5,110.



In September 2013, we entered into an agreement
with PBC Carlsbad, LLC for office space in Carlsbad, California. The agreement has a minimum period of six months ending February
28, 2014, at which time it was extended through August 2014, with a monthly cost of $1,033. At December 31, 2013, our minimum
payment commitment for the Carlsbad office space was $2,066.



58











Off-Balance Sheet Arrangements



As of December 31, 2013, we did not have
any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance
or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements
or other contractually narrow or limited purposes. In addition, we do not engage in trading activities involving non-exchange
traded contracts. Therefore, we are not materially exposed to any financing, liquidity, market or credit risk that could arise
if we had engaged in these relationships.



Recent Financings



On December 16, 2013, we entered into
subscription agreements to issue an aggregate amount of 72,007,000 shares of common stock for an aggregate purchase price of approximately
$18 million as part of a private placement. The purchasers of securities in each of these transactions acquired the securities
for investment only and not with a view to or for sale in connection with any distribution thereof and appropriate legends were
affixed to the securities issued in these transactions. Each of such purchasers was an “accredited investor” under
Rule 506 of Regulation D or not a “U.S. person” under Regulation S.



On June 26, 2013, we completed
a private placement of convertible preferred stock and warrants to purchase common stock with gross proceeds of $7.0
million through the sale of shares of our newly-created Series B Redeemable Convertible Preferred Stock. As part of the
same transaction, approximately $5.5 million in outstanding convertible notes were converted into shares of Series B
Convertible Preferred Stock and warrants to purchase common stock. On July 15, 2013, we completed a second closing in which
we converted approximately $0.8 million of outstanding convertible notes into Series B Redeemable Convertible Preferred Stock
and warrants to purchase common stock. The financing was led by life-sciences investors RA Capital Management and Third
Security, LLC, with participation from BioScience Managers Pty Ltd.



Under the terms of the financing,
we issued an aggregate amount of approximately 10.0 million shares of the Series B Redeemable Convertible Preferred Stock for
an aggregate purchase price of approximately $13.3 million (including the conversion of approximately $6.3 million
of outstanding convertible notes). Each share of Series B Redeemable Convertible Preferred Stock is convertible into 10
shares of common stock. Additionally, we issued warrants to purchase an aggregate of up to approximately 25.0 million shares
of common stock at an exercise price of $0.14 per share. As a result of the completion of this private placement, as of July
15, 2013, all previously issued convertible notes have been converted and there are no convertible notes outstanding.



Comparison of the Years Ended December 31, 2012 and 2011



Revenue



For the years ended December 31, 2012
and 2011, we recognized $0.7 million and $0.1 million in revenue, respectively. For the years ended December 31, 2012 and 2011,
we earned $0.6 million and $0.1 million of revenue through sublicensing agreements involving our former gene therapy program.



For the years ended December 31, 2012
and 2011, we also earned $0.1 million and $20,000 in grant revenue, respectively.



Research and Development



Research and development expenses were
$1.5 million for the year ended December 31, 2012, compared to $0.7 million for the year ended December 31, 2011. The $0.8 million
increase in expenses is due to an increase in consulting and development expenses.



Research and development expenses are
expected to increase in 2013 compared to 2012 as we plan to continue devoting substantial resources to research and development
in future periods as we start clinical trials and continue our discovery efforts.



59







General and Administrative



General and administrative expenses were
$3.2 million for 2012, compared to $3.3 million for 2011. The $0.1 million decrease is due to lower administrative staffing and
facilities expenses, partially offset by higher legal expenses related to the acquisition of SPH.



We currently expect our general and administrative
expenses to increase in 2013 compared to 2012 due to the costs associated with preparing this registration statement and being
a public company.



Discontinued Operations



In June 2012, we sold certain assets used
in our gene therapy business including process development, quality control, quality assurance, manufacturing and bioanalytical
functions for $3.1 million. In addition to this cash consideration, we may receive a long-term royalty of 1.75% on all product
sales. This royalty may be completely canceled at any time by a one-time payment of $1.8 million.



Tax Refund



As of December 31, 2012, we had a United
Kingdom research and development tax refund of $0.1 million (£0.1 million) for the losses in the subsidiary based in the
United Kingdom, compared to $0.3 million for 2011. The decrease in the refund was due to reduced staffing in 2012 compared to
2011.



Interest Income (Expense)



Interest expense in 2012 was $0.3 million,
compared to $0.1 million for 2011. The increase was due to interest accrued for convertible notes. During 2012 and 2011, we issued
$1.0 million and $2.7 million in convertible notes, respectively. Interest on the unpaid principal balance of these notes accrues
at the rate of ten percent (10%) per annum.



Income Taxes



We incurred net operating losses for
the years ended December 31, 2012 and 2011 and, accordingly, we did not pay any federal or state income taxes. As of December
31, 2012, we had accumulated approximately $57.8 million in U.S., Australian and UK operating loss carry-forwards and
research tax credit carry-forwards of approximately $4.3 million. The carry-forwards began to expire in 2012. Our net
operating loss carry-forwards are subject to certain limitations on annual utilization as a result of changes in ownership of
us, as defined by federal and state tax laws.



Net Operating Losses



We have not recorded a benefit from our
net operating loss or research credit carry-forwards because we believe that it is uncertain that we will have sufficient income
from future operations to realize the carry-forwards prior to their expiration. Accordingly, we have established a 100% valuation
allowance against the deferred tax asset arising from the carry-forwards.



|Item
    7A. | QUANTITATIVE
    AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
|------------ | --------------------------------------------------------------



We are a smaller reporting company as
defined by Rule 12b-2 of the Exchange Act and are not required to provide the information required under this item.



60







|Item
    8. | FINANCIAL
    STATEMENTS AND SUPPLEMENTARY DATA
|----------- | -----------------------------------------------



AMPLIPHI BIOSCIENCES
CORPORATION



INDEX TO CONSOLIDATED
FINANCIAL STATEMENTS



|AmpliPhi Biosciences Corporation                                                                                                                              |    
|------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---
|                                                                                                                                                              |    
|Report of Independent
    Registered Public Accounting Firm                                                                                                   | F-1
|                                                                                                                                                              |    
|Consolidated Balance
    Sheets as of December 31, 2013 and 2012 (Audited)                                                                                    | F-2
|                                                                                                                                                              |    
|Consolidated
    Statements of Operations for the Years Ended December 31, 2013 and 2012 (Audited)                                                            | F-3
|                                                                                                                                                              |    
|Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) for the Years Ended December 31, 2013 and 2012 (Audited) | F-4
|                                                                                                                                                              |    
|Consolidated Statements
    of Cash Flows for the Years Ended December 31, 2013 and 2012 (Audited)                                                            | F-5
|                                                                                                                                                              |    
|Notes to Consolidated
    Financial Statements for the Years Ended December 31, 2013 and 2012 (Audited)                                                       | F-6



61







INDEPENDENT AUDITOR’S
REPORT















To the Board of Directors and Shareholders

AmpliPhi Biosciences Corporation and Subsidiaries

Richmond, Virginia





We have audited the accompanying
consolidated balance sheets of AmpliPhi Biosciences Corporation and Subsidiaries (the Company) as of December 31, 2013 and
2012, and the related consolidated statements of operations, redeemable convertible preferred stock and stockholders' equity
(deficit), and cash flows for the years then ended. These financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these financial statements based on our audits.



We conducted our audits in accordance with
the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform
the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Company
is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits
included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate
in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control
over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable
basis for our opinion.



In our opinion, the consolidated financial
statements referred to above present fairly, in all material respects, the financial position of AmpliPhi Biosciences Corporation
and Subsidiaries as of December 31, 2013 and 2012, and the results of their operations and their cash flows for the years then
ended, in conformity with U.S. generally accepted accounting principles.





As discussed in Note 13 to the financial
statements, the 2013 and 2012 financial statements have been restated to correct misstatements.



/s/ PBMares, LLP



Richmond, Virginia

April 15, 2015







F-1







AmpliPhi Biosciences
Corporation

Consolidated Balance Sheets



|                                                                                                                                                                                                       |  | December 31, |             
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |  | ------------ | ------------
|                                                                                                                                                                                                       |  | 2013         |             
|                                                                                                                                                                                                       |  | (Restated)   |             
|Assets                                                                                                                                                                                                 |  |              |             
|Current assets                                                                                                                                                                                         |  |              |             
|Cash and cash equivalents                                                                                                                                                                              |  | $            | 20,355,000  
|Accounts receivable                                                                                                                                                                                    |  |              | 8,000       
|Tax refund                                                                                                                                                                                             |  |              | —           
|Prepaid expenses and other current assets                                                                                                                                                              |  |              | 297,000     
|Total current assets                                                                                                                                                                                   |  |              | 20,660,000  
|Property and equipment, net of accumulated depreciation
    of $473,000 and $391,000 as of December 31, 2013 and December 31, 2012, respectively                                                       |  |              | 145,000     
|Intangible Assets                                                                                                                                                                                      |  |              |             
|In process research and development                                                                                                                                                                    |  |              | 12,446,000  
|Patents, net of accumulated amortization of $93,000 and $62,000 as of
    December 31, 2013 and December 31, 2012, respectively                                                                        |  |              | 400,000     
|Goodwill                                                                                                                                                                                               |  |              | 7,562,000   
|Total intangible assets                                                                                                                                                                                |  |              | 20,408,000  
|Total assets                                                                                                                                                                                           |  | $            | 41,213,000  
|Liabilities Series B Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit)                                                                                                         |  |              |             
|Current liabilities                                                                                                                                                                                    |  |              |             
|Accounts payable and accrued expenses                                                                                                                                                                  |  | $            | 2,147,000   
|Deferred revenue                                                                                                                                                                                       |  |              | 244,000     
|Convertible loan notes                                                                                                                                                                                 |  |              | —           
|Accrued interest                                                                                                                                                                                       |  |              | —           
|Total current liabilities                                                                                                                                                                              |  |              | 2,391,000   
|Long term liabilities                                                                                                                                                                                  |  |              |             
|Derivative preferred shares conversion liability                                                                                                                                                       |  |              | 40,791,000  
|Derivative warrants liability                                                                                                                                                                          |  |              | 16,871,000  
|Deferred tax liability                                                                                                                                                                                 |  |              | 3,078,000   
|Total long term liabilities                                                                                                                                                                            |  |              | 60,740,000  
|Total liabilities                                                                                                                                                                                      |  |              | 63,131,000  
|                                                                                                                                                                                                       |  |              |             
|Series B redeemable convertible preferred stock                                                                                                                                                        |  |              |             
|$0.01 par value, 10,000,000 shares authorized, 8,859,978
    shares issued and outstanding at December 31, 2013 (liquidation preference of $13,022,000 at December 31, 2013)                           |  |              | 707,000     
|                                                                                                                                                                                                       |  |              |             
|Stockholders’ equity (deficit)                                                                                                                                                                         |  |              |             
|Common stock, $0.01 par value, 445,000,000 shares authorized,
    182,535,562 shares issued and outstanding at December 31, 2013 and 66,908,810 shares issued and outstanding at December 31,
    2012 |  |              | 1,825,000   
|Additional paid-in capital                                                                                                                                                                             |  |              | 358,828,000 
|Paid-in-capital – contingent shares                                                                                                                                                                    |  |              | 1,837,000   
|Paid-in-capital – escrow shares                                                                                                                                                                        |  |              | —           
|Accumulated deficit                                                                                                                                                                                    |  |              | (385,115,000
|Total stockholders’ equity (deficit)                                                                                                                                                                   |  |              | (22,625,000 
|Total liabilities series B redeemable convertible
    preferred stock and stockholders’ equity (deficit)                                                                                               |  | $            | 41,213,000  



The accompanying notes are an integral
part of these consolidated financial statements.



F-2







AmpliPhi Biosciences
Corporation

Consolidated Statements of Operations

|                                                                                    |  | Year Ended December 31, |            
|----------------------------------------------------------------------------------- |  | ----------------------- | -----------
|                                                                                    |  | 2013                    |            
|                                                                                    |  | (Restated)              |            
|Revenue                                                                             |  |                         |            
|Licensing revenue                                                                   |  | $                       | 81,000     
|Total revenue                                                                       |  |                         | 81,000     
|Operating expenses                                                                  |  |                         |            
|Research and development                                                            |  |                         | 6,469,000  
|General and administrative                                                          |  |                         | 5,996,000  
|Total operating expenses                                                            |  |                         | 12,465,000 
|Loss from operations                                                                |  |                         | (12,384,000
|Other income (expense)                                                              |  |                         |            
|Loss on derivative liabilities                                                      |  |                         | (49,330,000
|Amortization of note discount                                                       |  |                         | (2,636,000 
|Interest expense, net                                                               |  |                         | (233,000   
|Tax refund and other income                                                         |  |                         | —          
|Loss on disposal of property and equipment                                          |  |                         | —          
|Other income (expense), net                                                         |  |                         | (52,199,000
|Loss from continuing operations                                                     |  |                         | (64,583,000
|Discontinued operations                                                             |  |                         |            
|Gain on sale of discontinued operations assets                                      |  |                         | —          
|Net loss                                                                            |  |                         | (64,583,000
|Accretion of Series B redeemable convertible preferred stock                        |  |                         | (618,000   
|Net loss attributable to common stockholders                                        |  | $                       | (65,201,000
|Per share information:                                                              |  |                         |            
|Net loss per share of common stock from continuing operations – basic
    & diluted |  | $                       | (0.64      
|Gain per share of common stock from discontinued operations
     – basic & diluted  |  |                         | —          
|Net loss per share of common stock – basic
    & diluted                            |  |                         | (0.64      
|Weighted average number of shares of common stock
    outstanding – basic & diluted |  |                         | 101,201,753



The accompanying notes are an integral
part of these consolidated financial statements.



F-3







AmpliPhi Biosciences
Corporation

Consolidated Statements of Redeemable
Convertible Preferred Stock and Stockholders’ Equity (Deficit)



|                                                                                                  |  | Redeemable
    ConvertiblePreferred Stock |            |   | Shareholders'
    Equity (Deficit) |  
|------------------------------------------------------------------------------------------------- |  | ----------------------------------------- | ---------- | - | ---------------------------------- | -
|                                                                                                  |  | Series
    B                              |            |   | Common
    Stock                   |  
|                                                                                                  |  | Shares                                    |            |   | Amount                             |  
|Balances, December 31, 2011 (Restated)                                                            |  |                                           | —          |   |                                    | $
|Net loss                                                                                          |  |                                           | —          |   |                                    |  
|Stock-based compensation                                                                          |  |                                           | —          |   |                                    |  
|Shares issued for SPH Holdings                                                                    |  |                                           | —          |   |                                    |  
|Shares held in escrow for
    SPH Holdings                                                        |  |                                           | —          |   |                                    |  
|Balances, December 31, 2012 (Restated)                                                            |  |                                           | —          |   |                                    | $
|Net loss                                                                                          |  |                                           | —          |   |                                    |  
|Stock-based compensation                                                                          |  |                                           | —          |   |                                    |  
|Beneficial conversion feature
    and warrants associated with issuance of convertible loan notes |  |                                           | —          |   |                                    |  
|Shares issued for Intrexon                                                                        |  |                                           | —          |   |                                    |  
|Accretion of Series B convertible
    preferred stock to its redemption value                     |  |                                           | —          |   |                                    |  
|Issuance of preferred stock
    from conversion of convertible loan notes                         |  |                                           | 5,016,081  |   |                                    |  
|Issuance of preferred stock                                                                       |  |                                           | 4,999,999  |   |                                    |  
|Preferred shares converted
    to common stock                                                    |  |                                           | (1,156,102 | ) |                                    |  
|Stock options exercised                                                                           |  |                                           | —          |   |                                    |  
|Shares released from escrow                                                                       |  |                                           | —          |   |                                    |  
|Issuance of common stock
    for December financing                                               |  |                                           | —          |   |                                    |  
|Escheat shares                                                                                    |  |                                           | —          |   |                                    |  
|Balances, December 31, 2013 (Restated)                                                            |  |                                           | 8,859,978  |   |                                    | $



The accompanying notes are an integral
part of these consolidated financial statements.



F-4







AmpliPhi Biosciences
Corporation

Consolidated Statements of Cash Flows



|                                                                                                                    |  | Year Ended December 31, |            
|------------------------------------------------------------------------------------------------------------------- |  | ----------------------- | -----------
|                                                                                                                    |  | 2013                    |            
|                                                                                                                    |  | (Restated)              |            
|Cash flows from operating activities                                                                                |  |                         |            
|Loss from continuing operations                                                                                     |  | $                       | (64,583,000
|Adjustments required to reconcile net loss from continuing
    operations to net cash used in operating activities: |  |                         |            
|Loss on derivative liabilities                                                                                      |  |                         | 49,330,000 
|Shares issued for technology access fee                                                                             |  |                         | 3,000,000  
|Amortization of note discount and patents                                                                           |  |                         | 2,667,000  
|Warrants issued as investment fees                                                                                  |  |                         | 759,000    
|Depreciation                                                                                                        |  |                         | 82,000     
|Loss on disposal of property & equipment                                                                            |  |                         | —          
|Stock-based compensation                                                                                            |  |                         | 1,437,000  
|Changes in operating assets and liabilities net of acquisitions:                                                    |  |                         |            
|Accounts receivable                                                                                                 |  |                         | 15,000     
|Tax refund                                                                                                          |  |                         | 618,000    
|Accounts payable and accrued expenses                                                                               |  |                         | 454,000    
|Prepaid expenses and other current assets                                                                           |  |                         | (149,000   
|Accrued interest on loan notes                                                                                      |  |                         | 233,000    
|Other                                                                                                               |  |                         | (155,000   
|Net cash used in operating activities                                                                               |  |                         | (6,292,000 
|Cash flows from investing activities                                                                                |  |                         |            
|Gain on sale of discontinued operations assets                                                                      |  |                         | —          
|Purchases of property and equipment                                                                                 |  |                         | (102,000   
|Net cash provided by (used in) investing activities                                                                 |  |                         | (102,000   
|Cash flows from financing activities                                                                                |  |                         |            
|Proceeds from December financing                                                                                    |  |                         | 16,887,000 
|Proceeds from Series B redeemable convertible preferred
    stock                                                   |  |                         | 7,000,000  
|Proceeds from issuance of convertible loan notes                                                                    |  |                         | 2,000,000  
|Net cash provided by financing activities                                                                           |  |                         | 25,887,000 
|Net increase (decrease) in cash and cash equivalents                                                                |  |                         | 19,493,000 
|Cash and cash equivalents, beginning of year                                                                        |  |                         | 862,000    
|Cash and cash equivalents, end of year                                                                              |  | $                       | 20,355,000 
|Supplemental schedule of non-cash financing activities:                                                             |  |                         |            
|Conversion of convertible loan notes and accrued interest
    to Series B Redeemable Convertible Preferred Stock    |  | $                       | 6,316,000  
|Accretion of Series B redeemable convertible preferred
    stock                                                    |  |                         | 618,000    



The accompanying notes are an integral
part of these consolidated financial statements.



F-5







AmpliPhi Biosciences
Corporation

Notes to Consolidated Financial Statements

Year Ended December 31, 2013

(Audited) (Restated)



1. Nature of Business and Significant Accounting Policies



Nature of Business



AmpliPhi Biosciences Corporation (the
“Company”) was incorporated in the state of Washington in 1989 under the name Targeted Genetics Corporation. In February
2011, Targeted Genetics Corporation changed its name to AmpliPhi Biosciences Corporation. The Company, headquartered in Richmond,
Virginia, is dedicated to developing novel antibacterial solutions called bacteriophage (phage). Phages are naturally occurring
viruses that preferentially target and kill their bacterial targets.



Basis of Presentation



The consolidated financial statements
include the accounts of the Company and its wholly owned subsidiaries AmpliPhi Australia Pty Ltd, Biocontrol Limited, Genovo,
Inc. (inactive), and TGCF Manufacturing Corporation (inactive). All significant intercompany accounts and transactions have been
eliminated.



Use of Estimates



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



Cash and Cash Equivalents



The Company considers cash equivalents
to be short-term investments that have a maturity at the time of purchase of three months or less, are readily convertible into
cash and have an insignificant level of valuation risk attributable to potential changes in interest rates. Cash equivalents are
recorded at cost, which approximates fair market value, and consist primarily of money market accounts.



Accounts Receivable



Accounts receivable amounts are stated
at their face amounts less any allowance. Provisions for doubtful accounts are estimated based on assessment of the probable collection
from specific customer accounts and other known factors. If an account was determined to be uncollectible (payment has not been
made in accordance with contract terms), it would be written off against the allowance. As of December 31, 2013 and December 31,
2012, management determined no allowance for doubtful accounts was required.



Property and Equipment



Property and equipment are recorded at
cost and are depreciated using the straight-line method over the estimated useful lives of the related assets, generally three
to seven years.



Prepaid Expenses and Other Current Assets



Prepaid and other current assets as of
December 31, 2013 and December 31, 2012 consist primarily of prepaid insurance and deposits.



F-6







Goodwill



Costs of investments in purchased companies
in excess of the underlying fair value of net assets at the date of acquisition are recorded as goodwill and assessed annually
for impairment. If considered impaired, goodwill will be written down to fair value and a corresponding impairment loss recognized.



During the year ended December 31, 2012,
the rights to SPH Holdings Pty Ltd’s know-how and phage libraries were acquired by the business combination described in
Note 11 for $7,172,000. At December 31, 2012, goodwill in the amount of $3,929,000 has been recorded. In management’s opinion,
no goodwill has been impaired as of December 31, 2013 and December 31, 2012.



During the year ended December 31, 2011,
the rights to Biocontrol Limited’s patents and phage libraries were acquired by the business combination described in Note
11. At December 31, 2011, goodwill in the amount of $3,633,000 has been recorded. In management’s opinion, no goodwill has
been impaired as of December 31, 2013 and December 31, 2012.



Patents



Patents are recorded at cost and are amortized
using the straight-line method over the estimated useful lives of the patents.



During the year ended December 31, 2011,
the rights to Biocontrol Limited’s patents were acquired by the business combination described in Note 11. At December 31,
2011, patents in the amount of $493,000 have been recorded. These patents are amortized over their useful life through December
2026.



Stock-Based Compensation



The Company accounts for stock-based payments
under the guidance of Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) 718, Stock Compensation, which requires measurement of compensation cost for all share-based payment awards at fair value on the date of grant and
recognition of compensation cost over the requisite service period (typically the vesting period) for awards expected to vest.



Warrants and Preferred Shares Conversion Feature Liability



The Company accounts for warrants and
preferred shares conversion feature with anti-dilution (“down-round”) provisions under the guidance of ASC 815, Derivative
and Hedging, and Emerging Issue Task Force Statement 07-5: Determining Whether an Instrument (or Embedded Feature) Is Indexed
to an Entity’s Own Stock, which require the warrants and the preferred shares conversion feature to be recorded as a
liability and adjusted to fair value in each reporting period.



Fair Value of Financial Assets and Liabilities –
Derivative Instruments



The Company measures the fair value of
financial assets and liabilities in accordance with GAAP, which defines fair value, establishes a framework for measuring fair
value, and requires certain disclosures about fair value measurements.



GAAP defines fair value as the exchange
price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous
market for the asset or liability in an orderly transaction between market participants on the measurement date. GAAP also establishes
as fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable
inputs when measuring fair value. GAAP describes three levels of inputs that may be used to measure fair value:



Level 1 – quoted prices in active
markets for identical assets or liabilities.



Level 2 – quoted prices for similar
assets and liabilities in active markets or inputs that are observable.



Level 3 – inputs that are unobservable.



F-7







The Company does not use derivative financial
instruments to hedge exposures to cash-flow, market or foreign-currency risks. However, the Company has entered into certain financial
instruments and contracts, such as convertible loan notes with detachable common stock warrants and the issuance of preferred
stock with detachable common stock warrants with features that are either i) not afforded equity classification, ii) embody risks
not clearly and closely related to host contracts, or iii) may be net-cash settled by the counterparty. These instruments are
required to be carried as derivative liabilities, at fair value.



The Company estimates fair values of these
derivatives utilizing Level 3 inputs. The Company uses the Monte Carlo valuation technique for derivatives as it embodies all
of the requisite assumptions (including trading volatility, remaining term to maturity, market price, strike price, risk free
rates) necessary to fair value these instruments.



Estimating fair values of derivative financial
instruments, including Level 3 instruments, require the use of significant and subjective inputs that may, and are likely to,
change over the duration of the instrument with related changes in internal and external market factors. In addition, option-based
techniques are volatile and sensitive to changes in our trading market price, the trading market price of various peer companies
and other key assumptions. Since derivative financial instruments are initially and subsequently carried at fair value, our income
will reflect this sensitivity of internal and external factors.



Revenue Recognition



The Company generates revenue from technology
licenses, collaborative research arrangements and agreements to provide research and development services. Revenue under technology
licenses typically consists of nonrefundable, up-front license fees, technology access fees and various other payments. The Company
recognizes revenue associated with performance milestones as earned, typically based upon the achievement of the specific milestones
defined in the applicable agreements.



The Company recognizes revenue under research
and development contracts as the related costs are incurred. When contracts include multiple elements, the Company follows ASC
605-25, Multiple Element Arrangements, which requires the Company to satisfy the following before revenue can be recognized:



| | • | The delivered items have value to the customer on a stand-alone basis;
| | - | ----------------------------------------------------------------------



| | • | Any undelivered items have objective and reliable evidence of fair value; and
| | - | -----------------------------------------------------------------------------



| | • | Delivery or performance is probable and within the Company’s control for any delivered
    items that have a right of return.
| | - | -----------------------------------------------------------------------------------------------------------------------------



The Company classifies advance payments
received in excess of amounts earned as deferred revenue.

Based upon the terms specified in its collaboration agreements,
the Company receives advance payments from some of its collaboration partners before the project has been performed. These payments
are deferred and recognized as revenue when the costs are incurred.



Research and Development Costs



In Process Research
& Development (IPR&D) assets represent capitalized incomplete research projects that the Company acquired through business
combinations. Such assets are initially measured at their acquisition date fair values. The fair value of the research projects
is recorded as intangible assets on the consolidated balance sheet rather than expensed regardless of whether these assets have
an alternative future use. The amounts capitalized are being accounted for as indefinite-lived intangible assets, subject to impairment
testing until completion or abandonment of research and development efforts associated with the projects. Upon successful completion
of each project, the Company will make a determination as to the then remaining useful life of the intangible asset and begin
amortization. The Company tests its indefinite-lived intangibles, including IPR&D assets, for impairment at least quarterly.



During the year ended December 31, 2012,
the rights to SPH Holdings Pty Ltd’s IPR&D were acquired by the business combination described in Note 11. At December
31, 2012, IPR&D in the amount of $5,161,000 has been recorded. In management’s opinion, this IPR&D has not been
impaired as of December 31, 2013 and December 31, 2012.



F-8







During the year ended December 31, 2011,
the rights to Biocontrol IPR&D and patents were acquired by the business combination described in Note 11. At December 31,
2011, IPR&D in the amount of $7,285,000 has been recorded. In management’s opinion, this IPR&D has not been impaired
as of December 31, 2013 and December 31, 2012.



Research and development costs include
salaries, costs of outside collaborators and outside services, royalty and license costs and allocated facility, occupancy and
utility expenses. The Company expenses research and development costs as incurred.



Net Loss per Common Share



Net loss per common share is based on
net loss divided by the weighted average number of common shares outstanding during the period. For each fiscal year reported,
the diluted net loss per share is the same as the basic net loss per share because all stock options, warrants, contingent shares,
and Series B Preferred shares are antidilutive with respect to computing the net loss per share and therefore are excluded from
the calculation of diluted net loss per share. The total numbers of shares that the Company excluded from the calculations of
net loss per share were 77,490,242 shares for the year ending December 31, 2013 and 2,841,530 shares for the year ending December
31, 2012.





F-9







2. Property and Equipment



Property and equipment consist of the
following:



|                                       |  | December 31, |         
|-------------------------------------- |  | ------------ | --------
|                                       |  | 2013         |         
|Furniture and equipment                |  | $            | 618,000 
|Less: accumulated depreciation         |  |              | (473,000
|Total furniture and equipment,
    net |  | $            | 145,000 



Depreciation expense totaled $82,000 and
$60,000 for the years ended December 31, 2013 and 2012, respectively.



During the year ended December 31, 2012,
the Company sold or disposed of certain property and equipment no longer used as a result of the reprioritization of its business
priorities. The Company recognized a net loss of $30,000 on the disposal of property and equipment in the consolidated statements
of operations for the year ended December 31, 2012.



3. Income Taxes



Significant components of our US, Australia
and UK deferred tax assets and liabilities were as follows:



|                                               |  | December 31, |            
|---------------------------------------------- |  | ------------ | -----------
|                                               |  | 2013         |            
|Deferred tax assets                            |  |              |            
|Net operating loss carry-forwards              |  | $            | 59,051,000 
|Research and orphan drug credit carry-forwards |  |              | 3,700,000  
|Depreciation and amortization                  |  |              | (4,000     
|Stock options and other                        |  |              | 1,123,000  
|Gross deferred tax assets                      |  |              | 63,876,000 
|Deferred tax liability:                        |  |              |            
|In process research and development            |  |              | 3,162,000  
|Valuation allowance for deferred tax assets    |  |              | (63,786,000
|Net deferred tax liability                     |  | $            | 3,078,000  



The change in the valuation allowance
was a $3.1 million increase in 2013 and a $5.5 million decrease in 2012.



The Company recorded deferred tax liabilities
of $3,078,000 related to the acquired IPR&D from the acquisitions of Biocontrol and SPH.



At December 31, 2013, the
Company had U.S., Australian and UK gross net operating loss carry-forwards, or “NOLs”, of approximately
$170.5 million and research tax credit carry-forwards of approximately $3.7 million. The carry-forwards began to expire
in 2012, and may be further subject to the application of Section 382 of the Internal Revenue Code of 1986 or the
“Code”, as discussed further below. The Company has provided a valuation allowance to offset the deferred tax
assets due to the uncertainty of realizing the benefits of the net deferred tax asset.



The Company’s past sales and issuances
of stock have likely resulted in ownership changes as defined by Section 382 of the Code. A study has not been done at this
time because the full valuation allowance eliminating potential profit and loss adjustments due to changes in the gross amount
of the NOLs and credits would be offset by a change in the valuation allowance. It is possible that a future analysis may result
in the conclusion that a substantial portion, or perhaps substantially all, of the NOLs and credits will expire due to the limitations
of Sections 382 and 383 of the Code. As a result, the utilization of the NOLs and tax credits may be limited and a portion of
the carry-forwards may expire unused.



F-10







The Company does not have any material
unrecognized tax benefits as of December 31, 2013.



The Company is subject to income taxes
in the U.S. federal jurisdiction as well as in the United Kingdom for any activity of Biocontrol Ltd and in Australia for any
activity of Special Phage Holdings Pty Ltd. Tax regulations within each jurisdiction are subject to the interpretation of the
related tax laws and regulations and require significant judgment to apply. The Company is subject to U.S. federal tax examinations
by tax authorities for the years 1998 to 2012 due to the fact that NOLs exist going back to 1998 that may be utilized on a current
or future year tax return.



The Company has a policy of recognizing
tax related interest and penalties as additional tax expense. During the years ended December 31, 2013, and 2012 the Company
did not recognize any interest and penalties.



4. Commitments and Contingencies



As part of the acquisition of SPH Holdings
Pty Ltd (Note 11), the Company paid $100,000 and issued an additional 2,000,000 shares of common stock to Cellabs Pty Ltd (Cellabs)
as part of a repayment agreement for its outstanding loans to SPH Holdings Pty Ltd. In January 2013, the Company paid an additional
$50,000 to Cellabs. The remaining loan balance of $200,000 was paid in December 2013.



In February 2011, the Company entered
into an agreement with Virginia Biotechnology Research Partnership Authority for Richmond, Virginia laboratory space. This agreement
had a contractual expiration date of February 29, 2012 at which time it converted to a rolling three-month lease. At December
31, 2013, the Company’s minimum payment commitment for the Company’s Richmond, Virginia laboratory space was $4,800.



In December 2011, the Company entered
into an agreement with Nevis Limited and Charter Limited for laboratory space in Bedfordshire, United Kingdom. This agreement
has a minimum period of 3 years and a contractual expiration date of December 8, 2016. At December 31, 2013, the Company’s
minimum payment commitment for the Company’s Bedfordshire laboratory space was $127,000.



In February 2013, the Company entered
into an agreement with Office Suites Plus (now Regus Management Group, LLC) for office space in Glen Allen, Virginia. The agreement
has a minimum period of one year ending February 28, 2014, at which time it was extended through June 2014, with a monthly cost
of $2,555. At December 31, 2013, our minimum payment commitment for the Glen Allen space was $5,110.



In September 2013, the Company entered
into an agreement with PBC Carlsbad, LLC for office space in Carlsbad, California. The agreement has a minimum period of six months
ending February 28, 2014, at which time it was extended through August 2014, with a monthly cost of $1,033. At December 31, 2013,
our minimum payment commitment for the Carlsbad office space was $2,066.



The Company recognized rent expense under
operating leases of $214,000 in 2013 and $146,000 in 2012.



The Company is subject to legal claims
and actions related to the operations of its business. The Company does not expect the ultimate outcome of any such actions to
have a material impact on its consolidated financial position or results of operations.



5. Collaborative and Other Agreements



In June 2013, the Company entered into
a Collaborative Research and Development Agreement (CRADA) with the United States Army Medical Research and Materiel Command (USAMRMC)
and the Walter Reed Army Institute of Research (WRAIR). The CRADA will focus on developing and commercializing bacteriophage therapeutics
to treat S. aureus, E. coli and P. aeruginosa infections.



F-11







In March 2013, the Company entered into
an Exclusive Channel Collaboration Agreement with Intrexon Corporation. This agreement allows the Company to utilize Intrexon’s
synthetic biology platform for the identification, development and production of bacteriophage-containing human therapeutics.
The Company paid a one-time technology access fee to Intrexon of $3,000,000 in common stock. The Company shall pay Intrexon, in
cash or stock, milestone fees for the initiation of a Phase 2 trial of $2,500,000 upon commencement of the first Phase 2 trial
and $5,000,000 upon the first regulatory approval of any product in any major market country. With regard to each product sold
by the Company, the Company will pay, in cash, tiered royalties on a quarterly basis based on net sales of AmpliPhi Products,
calculated on a product-by-product basis.



6. Redeemable Convertible Preferred Stock



On June 13, 2013, the
Company’s Board of Directors approved a resolution designating 10,016,080 shares of Preferred Stock as Series B
Redeemable Convertible Preferred Stock (“Series B”) with an initial stated value of $1.40 and par value of $0.01.
Each Series B
Redeemable Convertible Preferred Stock share is convertible into 10 shares of common stock and is entitled to the number of votes
equal to the number of shares of common stock. These Series B
Redeemable Convertible Preferred Stock shares may be converted to common stock by the holder of the
shares at any time. The Series B
Redeemable Convertible Preferred Stock shares shall be automatically converted into common shares upon the closing of an
underwritten initial public offering with aggregate proceeds to the Company of at least $7 million and a price per share to
the public of at least the Series B
Redeemable Convertible Preferred Stock stated value upon the closing of which the shares of common stock of the Company shall be
listed for trading on the New York Stock Exchange. Until conversion, the holders of Series B
Redeemable Convertible Preferred Stock shares shall be
entitled to receive dividends of 10% of the Series B
Redeemable Convertible Preferred Stock stated value per annum.



In connection with the private placement
of Series B
Redeemable Convertible Preferred Stock, the Company recorded a liability for a complex embedded derivative that required bifurcation under ASC Section
815. The embedded derivative includes a redemption feature, multiple dividend features, as well as multiple conversion features
with a down-round ratchet provision. The Company estimates the fair values of the conversion feature using a Monte Carlo valuation
model. The Company measured the fair value of the conversion feature on June 26, 2013 and July 15, 2013 (dates of issuance) and
recorded the initial liability as part of the private placement proceeds.



On June 26, 2013, the Company issued 4,999,999
shares of the Company’s newly-created Series B
Redeemable Convertible Preferred Stock and warrants that would each be used to purchase 12,499,996 shares
of common stock at an exercise price of $0.14 per share for an aggregate purchase price of $7.0 million. The value of the derivative
liability related to the warrants was $1,886,000 and the value of the derivative liability related to the preferred shares was
$6,917,000. As part of the same transaction, the Company converted $5,491,000 in outstanding convertible loan notes (principal
and interest) into 4,357,936 shares of Series B stock and warrants to purchase 10,894,839 shares of common stock at an exercise
price of $0.14 per share. The value of the derivative liability related to the warrants was $1,644,000 and the value of the derivative
liability related to the preferred shares was $6,029,000. As part of this issuance, the Company issued warrants to purchase 4,999,999
shares of common stock at an exercise price of $0.14 per share with an initial fair value of $759,000 and paid $350,000 to the
placement agents. As a result of this financing, all outstanding convertible notes were converted into shares of Series B stock
and warrants to purchase common stock. On July 15, 2013, the remaining outstanding convertible loan notes, totaling $829,277 in
principal and interest, were converted into 658,145 shares of Series B stock and warrants to purchase 1,645,361 shares of common
stock at an exercise price of $0.14 per share. The value of the derivative liability related to the warrants was $674,000 and
the value of the derivative liability related to the preferred shares was $2,386,000,



On July 25, 2013, 1,132,875 Series B
Redeemable Convertible Preferred Stock shares
were converted into 11,328,750 shares of common stock. In connection with the conversion, $6,959,000 was reclassified from the
derivative liability to equity due to conversion.



On October 17, 2013, 23,227 Series B
Redeemable Convertible Preferred Stock shares
were converted into 232,270 shares of common stock. In connection with the conversion, $113,000 was reclassified out of the derivative
liability account and into equity.



The Company re-measured the fair value
of the conversion feature and recorded $38,382,000 in total charges to record the liabilities associated with the conversion feature
at their estimated fair value totaling $40,791,000 as of December 31, 2013.



F-12







7. Stock Options and Warrants



The Company follows ASC 815-40, Contracts
in an Entity’s Own Equity, as it relates to outstanding warrants. No warrants were exercised through December 31, 2013.



In connection with the December 2013 private
placement of 72,007,000 shares of the Company’s common stock at a price per share of $0.25, the Company issued an aggregate
of warrants to purchase 4,320,420 shares of common stock at an exercise price of $0.25 per share to the placement agents. These
warrants expire December 2018. These warrants contain provisions that protect holders from a decline in the issue price of the
Company’s common stock (“down-round” provision) and contain net settlement provisions. Due to these provisions,
the Company accounted for these warrants as liabilities instead of equity.



In connection with the private placement
of Series B
Redeemable Convertible Preferred Stock, which occurred through two closings on June 26, 2013 and July 15, 2013, respectively, the Company issued an
aggregate of warrants to purchase 30,040,195 shares of common stock at an exercise price of $0.14 per share. These warrants expire
June 2018. These warrants contain provisions that protect holders from a decline in the issue price of the Company’s common
stock (“down-round” provision) and contain net settlement provisions. Due to these provisions, the Company accounted
for these warrants as liabilities instead of equity. The Company measured the fair value of these warrants on June 26, 2013 and
July 15, 2013 and recorded the initial liability as part of the private placement proceeds and expensed $759,000 for the warrants
issued to the placement agent.



We estimate the fair values of these securities
using a Monte Carlo valuation model. The following warrants were issued in 2013 using the Monte Carlo valuation method with the
key inputs as follows:



|                        |  | June
    26, 2013 |                                                  |  | July
    15, 2013 |  |                                                  | December
    23, 2013 | 
|----------------------- |  | ----------------- | ------------------------------------------------ |  | ----------------- |  | ------------------------------------------------ | --------------------- | 
|Warrants Issued         |  |                   | 28,394,834                                       |  |                   |  | 1,645,361                                        |                       | 
|Risk free interest rate |  |                   | 0.0109                                           |  |                   |  | 0.0109                                           |                       | 
|Volatility              |  |                   | 160.94%                                          |  |                   |  | 163.08%                                          |                       | 
|Expected term           |  |                   | 5
                                         years |  |                   |  | 5
                                         years |                       | 
|Exercise price          |  |                   | $0.14                                            |  |                   |  | $0.14                                            |                       | 



The Company re-measured the fair value
of these warrants and recorded $9,929,000 in charges to record the liabilities associated with these warrants at their estimated
fair values totaling $16,311,000 as of December 31, 2013.



From February through May 2013,
in connection with the issuance of new convertible promissory notes, the Company issued warrants to purchase up to 7,030,387 shares
of its common stock. These warrants expire February through May 2018 and are exercisable at a price of $0.14 per share. These
warrants are considered to be equity.



On December 22, 2011, in connection with
the Biocontrol business combination, the Company issued warrants to purchase up to 1,355,164 shares of its common stock. These
warrants expire in December 2016 and are exercisable at a price of $0.46 per share. These warrants are considered to be liabilities.
As of December 31, 2013 the fair value of these warrants was $560,000.



Stock-Based Compensation



The Company’s Stock Incentive Plan
provides for the issuance of long-term incentive awards, or awards, in the form of non-qualified and incentive stock options,
or Options, stock appreciation rights, stock grants and restricted stock units. The awards may be granted by the Company’s
Board of Directors to its employees, directors and officers and to consultants, agents, advisors and independent contractors who
provide services to the Company. The exercise price for Options must not be less than the fair market value of the underlying
shares on the date of grant. Options expire no later than ten years from the date of grant and generally vest and become exercisable
over a four-year period following the date of grant. Every non-employee member of the Company’s Board of Directors receives
an annual non-qualified Option or restricted stock unit grant. Upon the exercise of Options, the Company issues the resulting
shares from shares reserved for issuance under the Company’s Incentive Plan.



F-13







Under ASC 718, Stock Compensation,the Company is required to expense the fair value of share-based payments granted over the vesting period. The Company values
Awards granted at their grant date fair value in accordance with the provisions of ASC 718 and recognizes stock-based compensation
expense on a straight-line basis over the service period of each award.



Stock-based compensation expense is reduced
by an estimated forfeiture rate derived from historical employee termination behavior. If the actual number of forfeitures differs
from the Company’s estimates, the Company may record adjustments to increase or decrease compensation expense in future
periods. There were no significant adjustments related to changes in the Company’s estimates for the year ended December
31, 2013 and year ended December 31, 2012.



Following is a summary of the amount included
as stock-based compensation expense in the accompanying consolidated statements of operations and comprehensive loss:



|                                       |  | Year Ended December 31,
    2013 |           |  | Year Ended December 31,
    2012 |  
|-------------------------------------- |  | -------------------------------- | --------- |  | -------------------------------- | -
|Stock options:                         |  |                                  |           |  |                                  |  
|Research and development expense       |  | $                                | 191,000   |  |                                  | $
|General and administrative expense     |  |                                  | 1,246,000 |  |                                  |  
|Restricted stock units:                |  |                                  |           |  |                                  |  
|Research and development expense       |  |                                  | —         |  |                                  |  
|General and administrative expense     |  |                                  | —         |  |                                  |  
|Total stock-based compensation expense |  | $                                | 1,437,000 |  |                                  | $



The following table summarizes Option
activity:



|                                 |  | Shares |            |   | Weighted Average
    Exercise Price |   |      | Average Remaining
    Contractual Term (Years) |  |  | Intrinsic Value | 
|-------------------------------- |  | ------ | ---------- | - | ----------------------------------- | - | ---- | ---------------------------------------------- |  |  | --------------- | 
|Outstanding at December 31, 2012 |  |        | 13,749,552 |   |                                     | $ | 0.21 |                                                |  |  |                 | 
|Granted                          |  |        | 12,350,000 |   |                                     |   | 0.18 |                                                |  |  |                 | 
|Exercised                        |  |        | (91,677    | ) |                                     |   | 0.20 |                                                |  |  |                 | 
|Forfeited                        |  |        | (284,375   | ) |                                     |   | 0.20 |                                                |  |  |                 | 
|Expired                          |  |        | (2,500     | ) |                                     |   | 5.70 |                                                |  |  |                 | 
|Outstanding at December 31, 2013 |  |        | 25,721,000 |   |                                     | $ | 0.19 |                                                |  |  | 9.15            | 
|Exercisable at December 31, 2013 |  |        | 8,619,584  |   |                                     | $ | 0.19 |                                                |  |  | 9.15            | 



The aggregate intrinsic value is determined
using the closing price of the Company’s common stock of $0.50 on December 31, 2013.



As of December 31, 2013, the Company had
unrecognized compensation cost related to unvested Options of approximately $2,219,000 net of estimated forfeitures, which the
Company expects to recognize over a weighted average period of approximately three years.



The fair value of each Option is estimated
on the date of grant using the Black-Scholes valuation method with the key inputs as follows:



|                         |  | Years Ended  December
    31, |      
|------------------------ |  | ----------------------------- | -----
|                         |  | 2013                          |      
|Risk-free interest rate  |  |                               | 1.13 
|Expected volatility      |  |                               | 160.9
|Expected term (in years) |  |                               | 4.0  
|Expected dividend yield  |  |                               | 0.0  



F-14







Reserved Shares



As of December 31, 2013, the Company had
reserved shares of its common stock for future issuance as follows:



|                                                               |  | Shares Reserved |           
|-------------------------------------------------------------- |  | --------------- | ----------
|Stock options outstanding                                      |  |                 | 25,721,000
|Available for future grants under the Stock Incentive
    Plan |  |                 | 10,658,083
|Warrants                                                       |  |                 | 42,746,165
|Total Shares reserved                                          |  |                 | 79,125,248



8. Discontinued Operations



In June 2012, the Company sold all of
its assets used in its gene therapy business including process development, quality control, quality assurance, manufacturing
and bioanalytical functions for $3.0 million. In addition to this cash consideration, the Company may receive a long term royalty
of 1.75% on certain product sales. This royalty may be completely canceled at any time by a one-time payment of $1.75 million.



9. Employee Retirement Plan



The Company sponsors an employee retirement
plan under Section 401(k) of the Internal Revenue Code of 1986, as amended. All of the Company’s employees who meet minimum
eligibility requirements are eligible to participate in the plan. Matching contributions to the 401(k) plan are made at the discretion
of the Company’s Board of Directors. The Company suspended matching contributions effective January 1, 2009.



10. Business Combinations



On November 9, 2012, the Company acquired
Australia-based Special Phage Services (“SPS”). The acquisition of SPS primarily focused on IPR&D being performed
on S. aureus infections, which is currently being developed under AmpliPhage-002: Wound and Skin Infections Caused by S.
aureus.



In a share exchange transaction, AmpliPhi
Australia Pty Limited, a wholly owned subsidiary of US-based AmpliPhi, acquired Sydney-based SPH, the holding company of SPS.
Under the terms of the acquisition, the Company offered 40 million shares of its common stock in exchange for 100% of the fully
diluted share capital of SPH. 20 million shares are held in escrow, 8 million to satisfy potential warranty claims under the transaction
documents and the remaining 12 million shares are held pending completion of certain milestones. At December 31, 2012, IPR&D
in the amount of $5,161,000 and goodwill in the amount of $3,929,000 have been recorded. In management’s opinion, this IPR&D
and goodwill have not been impaired as of December 31, 2013 and December 31, 2012.As part of this transaction, the Company acquired
$260,000 in assets to include a $221,000 receivable for an Australian research and development tax refund, $37,000 in equipment,
and $2,000 in cash. The Company also assumed liabilities of $613,000. On November 9, 2013, the 8 million shares held to satisfy
potential warranty claims were released.



On January 6, 2011, the Company acquired
Biocontrol, a clinical development stage biotechnology company in the United Kingdom (the “Acquisition”). The acquisition
of Biocontrol included an IPR&D project related to AmpliPhage-001: Lung Infections in Cystic Fibrosis (CF) Patients Caused
by P. aeruginosa.



The Company acquired 100% of the voting
stock of Biocontrol and issued 22,817,198 shares of its common stock to the Biocontrol shareholders with a total fair value of
approximately $8.8 million as of January 6, 2011. The Acquisition was made through an acquisition subsidiary, which has continued
post-Acquisition as Biocontrol. At December 31, 2011, IPR&D in the amount of $7,285,000, goodwill in the amount of $3,633,000,
and patents in the amount of $493,000 have been recorded. In management’s opinion, this IPR&D and goodwill have not
been impaired as of December 31, 2013 and December 31, 2012. The patents are being amortized over their useful life through December
2026.



F-15







11. Convertible Loan Notes



On February 1, 2013, the Company’s
Board of Directors approved the issuance of new convertible promissory notes in an aggregate principal amount not to exceed $7,500,000,
together with warrants to purchase shares of common stock of the Company. Interest on the unpaid principal balance of these notes
shall accrue from the investment date at the rate of ten percent (10%) per annum. The warrants have the right to purchase the
number of shares of the Company’s common stock equal to twenty five percent (25%) of the principal amount of such holder’s
note divided by $0.14. The company issued $2,000,000 in new convertible loan notes from February through May 2013, converted $1,900,000
of previous convertible loan notes and accrued interest into this new security, and issued warrants for 7,030,387 share of common
stock.



As a result of the private placement of
Series B
Redeemable Convertible Preferred Stock that consisted of two closings, occurring on June 26, 2013 and July 15, 2013, respectively,
all outstanding convertible notes were converted into shares of Series B
Redeemable Convertible Preferred Stock and warrants to purchase
shares of common stock at an exercise price of $0.14 per share. On June 26, 2013, as part of the first closing, the Company converted
$5,491,001 in outstanding convertible loan notes into 4,357,936 shares of Series B
Redeemable Convertible Preferred Stock and warrants to
purchase 10,894,839 shares of common stock at an exercise price of $0.14 per share. On July 15, 2013, the remaining outstanding
convertible loan notes, totaling $829,277, were converted into 658,145 shares of Series B
Redeemable Convertible Preferred Stock and warrants
to purchase 1,645,361 shares of common stock at an exercise price of $0.14 per share. $233,000 of interest expense was accrued
for all convertible loan notes held through July 15, 2013.



12. Related Parties



During the years ended December 31, 2013
and December 31, 2012, $110,000 and $30,000, respectively, were recognized in General and Administrative expenses for management
and accounting consultancy fees provided by two shareholders. The Company shares resources in the new Australian operations such
as facility space, electricity, insurance, and equipment with Cellabs, owned by a shareholder, and receives a quarterly invoice
for these services. The total expense for these services for the year ended December 31, 2013 was $70,000 and for December 31,
2012 was $6,000. As part of the acquisition of SPH (Note 11), the Company also entered into a loan repayment agreement with Cellabs
(Note 5) which was paid in full during 2013. As of December 31, 2013 and December 31, 2012, $152,000 and $562,000, respectively,
of current liabilities are due to related parties.



13. Correction of an Error



Previously Amended Financial Statements



The Company’s December 31, 2013 financial
statements were previously restated to remove deemed dividends booked on the issuance of preferred shares and to recognize the
increase in derivative expense due to adding several features to the valuation model used to measure the compound derivatives
and changing from a Black-Scholes valuation model to a Monte Carlo valuation model. Additional paid in capital and accumulated
deficit were reduced by $8,464,000 after removing the deemed dividends. Loss on derivative liabilities increased by $1,755,000
to $42,317,000 due to the change in the valuation model.



The Company also contracted a valuation
team to review the purchase price allocation of Biocontrol. As a result, in process research and development (IPR&D) was restated
and a new intangible asset, patents, was recognized. For the Biocontrol acquisition, $493,000 of IPR&D was reclassed to patents.
In addition, amortization expense for patents of $31,000 was recognized in both 2012 and 2013.



As a result of these corrections, the Company’s
net loss in 2013 increased $1,787,000 to $57,648,000. The net loss per share increased by $0.07 per share to $(0.57) per share
which also reflected the removal of the deemed dividends.



F-16







Amended Financial Statements



The Company’s financial statements for December 31, 2013
have been further amended to:



| | · | reclassify
                                         its Series B Redeemable Convertible Preferred Stock from Stockholders’ Equity (Deficit)
                                         to temporary equity due to the stock’s redemption features. This adjustment resulted
                                         in a reclassification of $707,000 of Stockholders’ Equity (Deficit) to Series B
                                         Redeemable Convertible Preferred Stock, including the par value of these shares of $89,000
                                         and the accretion of the stock’s redemption value of $618,000.
| | - | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | · | recognize deferred
                                         revenue and deferred costs related certain royalty contracts. This change resulted in
                                         a reduction in revenues of $244,000 and a reduction in G&A expense of $126,000.
| | - | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | · | reclassify
                                         certain warrants issued in 2011 as liability instruments. These warrants were previously
                                         recorded as equity instruments. This adjustment resulted in the in the establishment
                                         of a liability of $560,000 as of December 31, 2013.
| | - | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | · | adjust goodwill
                                         for the acquisitions of Biocontrol and SPH for acquired deferred tax liabilities and
                                         other adjustments. These changes resulted in an increase of $1,685,000 in goodwill related
                                         to the Biocontrol acquisition and $1,548,000 in goodwill related to the acquisition of
                                         SPH.
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | · | modify the
                                         key assumptions employed to value the compound derivative associated with the Series
                                         B Redeemable Convertible Preferred Stock and the Company’s 2013 warrants, under
                                         a Monte Carlo valuation model. The change in assumptions resulted in a $6,348,000 increase
                                         in the compound derivative liability, and a $353,000 reduction in the warrant liability.
                                         Loss on derivative liabilities increased by $7,013,000 for 2013.
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



As a result of these corrections, the
Company’s net loss in 2013, as amended, increased by $6,935,000 to $64,583,000. The net loss per share increased by $0.07
per share to $(0.64) per share.



14. Common Stock



In December 2013, the Company issued 72,007,000
shares of the Company's common stock at a price per share of $0.25. As part of this private placement, the Company issued warrants
to purchase 4,320,420 shares of common stock at an exercise price of $0.25 per share with an initial fair value of $1,442,000
and paid $1,115,000 to the placement agents.



15. Subsequent Events



On February 11, 2014, the Company held
a special meeting of shareholders at which the shareholders approved the planned reincorporation of the Company as a Delaware
corporation, a reverse stock split in a ratio at least one-for-five and up to one-for-twenty (with the timing and specific ratio
to be determined by the board of directors and to be effected prior to the reincorporation), the execution of indemnification
agreements with the Company’s directors and certain officers, and the adoption of the Company’s 2013 Stock Incentive
Plan (pursuant to which 40,000,000 shares of common stock are reserved for issuance, before giving effect to the reverse stock
split).





F-17









PART III



|Item 9. | CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS
    ON ACCOUNTING AND FINANCIAL DISCLOSURE.
|------- | -----------------------------------------------------------------------------------------



None.



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



Evaluation of Disclosure Controls and Procedures



Our management, with the participation
of our Principal Executive Officer and Principal Financial Officer, has evaluated the effectiveness of our disclosure controls
and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of the end of the period covered
by this report. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that
information required to be disclosed in the reports we file or submit under the Exchange Act is accumulated and communicated to
management, including our Principal Executive Officer and Principal Financial Officer, as appropriate, to allow timely decisions
regarding required disclosure. Based on this evaluation, our Principal Executive Officer and Principal Financial Officer, have
concluded that our financial disclosure controls and procedures were not effective during the period covered by this report due
to the material weakness in our internal control over financial reporting as described below.  A material weakness is
a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable
possibility that a material misstatement of the company’s annual or interim financial statements will not be prevented or
detected on a timely basis.



Management’s Report on Internal Control Over Financial
Reporting.



Our management is responsible for establishing
and maintaining adequate internal control over financial reporting for our company. Internal control over financial reporting
is defined in Exchange Act Rules 13a-15(f) and 15(d) -15(f) as a process designed by, or under the supervision of, our Principal
Executive and Principal Financial Officer to provide reasonable assurance regarding the reliability of financial reporting and
the preparation of financial statements for external purposes in accordance with generally accepted accounting principles and
includes those policies and procedures that:



| | · | pertain to the maintenance of records that in reasonable detail accurately and fairly reflect
    the transactions and disposition of our assets;
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------



| | · | provide reasonable assurance that transactions are recorded as necessary to permit preparation
    of financial statements in accordance with generally accepted accounting principles;
| | - | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | provide reasonable assurance that our receipts and expenditures are being made only in accordance
    with authorization of our management and directors; and
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------------------



| | · | provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition,
    use, or disposition of our assets that could have a material effect on the financial statements.
| | - | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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



Our management conducted an evaluation
of the effectiveness of our internal control over financial reporting and identified a material weakness in internal control over
financial reporting during the year ending December 31, 2013. A material weakness is a deficiency, or combination of deficiencies,
in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of the annual
or interim financial statement will not be prevented or detected on a timely basis. In making this assessment, we used the criteria
set forth by the Committee of Sponsoring Organizations of the Treadway Commission in 1992 (COSO), in Internal Control-Integrated
Framework. Because of the material weakness described below, management concluded that, during the year ending December 31, 2013,
our internal control over financial reporting was not effective.



Based upon management’s evaluation,
we concluded that we did not maintain adequate and effective internal control in the area of complex and non-routine transactions,
as of December 31, 2013. As a result, restatements of our consolidated financial statements for the year ended December 31, 2012
and for the periods ended September 30, 2013 and March 31, 2014 have been necessary. On the consolidated financial statements
for the year ended December 31, 2012, the following restatements were made: reclassification of part of in process research and
development to patents. On the consolidated financial statements for the period ended September 30, 2013 and March 31, 2014, restatements
were required to remove deemed dividends booked on the issuance of our Series B preferred shares and to recognize the increase
in derivative expense due to adding several features to the valuation model used to measure the compound derivatives in our Series
B Preferred shares issued in June and July 2013 and changing from a Black-Scholes valuation model to a Monte Carlo valuation model.



For the year ended December 31, 2013,
our independent registered public accounting firm, PB Mares, LLP was not required to report on the effectiveness of our internal
control over financial reports due to the exemptions allowed to smaller reporting companies.



62







Management has implemented a remediation
plan to address the material weakness. A formal review process of non-routine and complex transactions is now required and management
has retained consultants to assist with evaluation of such transactions.



As the Company continues to evaluate and
work to improve its internal control over financial reporting, management may execute additional measures to address potential
control deficiencies or modify the remediation plan described above. Management will continue to review and make necessary changes
to the overall design of the Company’s internal control.



Changes in Internal Controls Over Financial Reporting.



Other than as described below, there was
no change in our internal control over financial reporting during the fourth quarter of 2013 that has materially affected, or
is reasonably likely to materially affect, our internal control over financial reporting.



|Item 9B. | OTHER INFORMATION.
|-------- | ------------------



None.



63







PART III



Certain information required by Part III
of this Annual Report is omitted and will be incorporated by reference herein from our definitive proxy statement pursuant to
Regulation 14A in connection with the 2014 Annual Meeting of Stockholders.



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





|Name                              |  | Age |  | Position                                         
|--------------------------------- |  | --- |  | -------------------------------------------------
|Jeremy Curnock Cook (1)(2)(3)     |  | 64  |  | Chief Executive Officer and Chairman of the Board
|David E. Bosher                   |  | 61  |  | Chief Financial Officer                          
|Wendy S. Johnson                  |  | 62  |  | Chief Operating Officer and Director             
|Baxter F. Phillips, III           |  | 39  |  | Chief Business Officer                           
|Louis Drapeau (1)(2)(3)           |  | 70  |  | Director                                         
|Michael S. Perry, Ph.D. (1)(2)(3) |  | 55  |  | Director                                         
|Anthony Smithyman, Ph.D.          |  | 65  |  | Director                                         
|Julian P. Kirk                    |  | 40  |  | Director                                         



(1)      Member of the audit committee.



(2)      Member of the compensation
committee.



(3)      Member of the nominating
and corporate governance committee.



Additional information relating to our
directors and executive officers has been presented under the captions “Proposal No. 1 – Election of Directors”
and “Executive Officers and Directors” in our definitive proxy statement filed April 30, 2014. Such information is
incorporated herein by reference.



|Item 11. | EXECUTIVE COMPENSATION.
|-------- | -----------------------



Information relating to executive compensation
has been presented under the caption “Executive Compensation” in our definitive proxy statement filed April 30, 2014.
Such information is incorporated herein by reference.



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



Information relating to the security ownership
of our common stock by our management and other beneficial owners will be presented under the caption “Security Ownership
of Certain Beneficial Owners and Management” in our definitive proxy statement. Such information is incorporated herein
by reference.



Information relating to our equity compensation
plans will be presented under the caption “Equity Compensation Plan Information” in our definitive proxy statement.
Such information is incorporated herein by reference.



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



Information relating to certain relationships
of our directors and executive officers and related transactions, as well as director independence information, will be presented
under the caption “Certain Relationships and Related Transactions” in our definitive proxy statement. Such information
is incorporated herein by reference.



64







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



Information relating to principal accountant
fees and services will be presented under the caption “Principal Accountant Fees and Services” in our definitive proxy
statement. Such information is incorporated herein by reference.



65







PART IV



|Item 15. | EXHIBITS.
|-------- | ---------



The following exhibits are filed as part
of this Annual Report. Exhibit numbers correspond to the exhibit requirements of Regulation S-K.



|ExhibitNumber |  | Description
    of Document                                                                                                                                                                                                                                                             
|------------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|3.1           |  | Amended and Restated Articles of Incorporation, effective May 21, 2009 (incorporated by
    reference to Exhibit 3.1 to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                 
|              |  |                                                                                                                                                                                                                                                                                         
|3.2           |  | Articles of Amendment to Amended and Restated Articles of Incorporation, effective June
    26, 2013 (incorporated by reference to Exhibit 3.2 to the Registration Statement on Form 10 filed December 16, 2013).                                                                       
|              |  |                                                                                                                                                                                                                                                                                         
|3.3           |  | Articles of Correction to Amended and Restated Articles of Incorporation, effective June
    26, 2013 (incorporated by reference to Exhibit 3.3 to the Registration Statement on Form 10 filed December 16, 2013).                                                                      
|              |  |                                                                                                                                                                                                                                                                                         
|3.4           |  | Amended and Restated Bylaws (incorporated by reference to Exhibit 3.4 to the Registration
    Statement on Form 10 filed December 16, 2013).                                                                                                                                            
|              |  |                                                                                                                                                                                                                                                                                         
|4.1           |  | Specimen stock certificate evidencing shares of common stock (incorporated by reference
    to Exhibit 4.1 to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                           
|              |  |                                                                                                                                                                                                                                                                                         
|4.2           |  | Form of Warrant to Purchase Shares of Common Stock (incorporated by reference to Exhibit
    4.2 to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                                     
|              |  |                                                                                                                                                                                                                                                                                         
|4.3           |  | Subscription Agreement to Purchase Series B Preferred Stock and Warrants, dated June 26,
    2013 (incorporated by reference to Exhibit 4.3 to the Registration Statement on Form 10 filed December 16, 2013).                                                                          
|              |  |                                                                                                                                                                                                                                                                                         
|4.4           |  | Registration Rights Agreement, dated December 16, 2013 (incorporated by reference to Exhibit
    4.4 to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                                 
|              |  |                                                                                                                                                                                                                                                                                         
|4.5           |  | Subscription Agreement, dated December 16, 2013 (incorporated by reference to Exhibit 4.5
    to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                                        
|              |  |                                                                                                                                                                                                                                                                                         
|10.1          |  | Loan Repayment Deed, dated September 28, 2012, by and among the Company, Cellabs Pty Ltd
    and Special Phage Holdings Pty Ltd. (incorporated by reference to Exhibit 10.1 to the Registration Statement on Form 10 filed
    December 16, 2013).                                      
|              |  |                                                                                                                                                                                                                                                                                         
|10.2          |  | Exclusive Channel Collaboration Agreement, dated as of March 29, 2013, by and between the
    Company and Intrexon Corporation (incorporated by reference to Exhibit 10.2 to Amendment No. 2 to the Registration Statement
    on Form 10 filed April 15, 2014).                        
|              |  |                                                                                                                                                                                                                                                                                         
|10.3          |  | Stock Issuance Agreement, dated as of March 28, 2013, by and between the Company and Intrexon
    Corporation (incorporated by reference to Exhibit 10.3 to the Registration Statement on Form 10 filed December 16, 2013).                                                             
|              |  |                                                                                                                                                                                                                                                                                         
|10.4*         |  | Collaboration Agreement, dated as of April 24, 2013, by and between the Company and the
    University of Leicester (incorporated by reference to Exhibit 10.4 to the Registration Statement on Form 10 filed December
    16, 2013).                                                   
|              |  |                                                                                                                                                                                                                                                                                         
|10.5*         |  | Collaboration Agreement, dated as of August 1, 2013, by and among the Company, the University
    of Leicester and the University of Glasgow (incorporated by reference to Exhibit 10.5 to the Registration Statement on Form
    10 filed December 16, 2013).                          
|              |  |                                                                                                                                                                                                                                                                                         
|10.6*         |  | License, dated as of September 5, 2013, by and between the Company and the University of
    Leicester (incorporated by reference to Exhibit 10.6 to the Registration Statement on Form 10 filed December 16, 2013).                                                                    
|              |  |                                                                                                                                                                                                                                                                                         
|10.7          |  | Cooperative Research and Development Agreement, dated as of June 13, 2013, by and between
    the Company and United States Army Medical Research and Materiel Command (incorporated by reference to Exhibit 10.7 to the
    Registration Statement on Form 10 filed December 16, 2013).



66







|ExhibitNumber |  | Description of
    Document                                                                                                                                                                                                                                                                                                                             
|------------- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|10.8          |  | License Agreement, dated as of February 18, 2013, by and between the Company and Office
    Suites Plus Properties, Inc. (incorporated by reference to Exhibit 10.8 to the Registration Statement on Form 10 filed December
    16, 2013).                                                                                                              
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.9          |  | Agreement of Lease, dated as of February 23, 2011, by and between the Company and Virginia
    Biotechnology Research Partnership Authority (incorporated by reference to Exhibit 10.9 to the Registration Statement on Form
    10 filed December 16, 2013).                                                                                           
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.10         |  | Client Services Agreement, dated as of September 1, 2011, by and between the Company and
    PBC Carlsbad LLC (incorporated by reference to Exhibit 10.10 to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                                            
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.11         |  | Lease, dated as of December 8, 2011, by and between Biocontrol Limited, Nevis Limited and
    Charter Limited (incorporated by reference to Exhibit 10.11 to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                                            
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.12+        |  | 2009 Targeted Genetics Stock Incentive Plan (incorporated by reference to Exhibit 10.12
    to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                                                                                                          
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.13+        |  | 2012 Stock Incentive Plan (incorporated by reference to Exhibit 10.13 to the Registration
    Statement on Form 10 filed December 16, 2013).                                                                                                                                                                                                            
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.14+        |  | Form of Stock Option Agreement under 2012 Stock Incentive Plan (incorporated by reference
    to Exhibit 10.14 to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                                                                                       
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.15+        |  | Employment Agreement, dated as of October 19, 2011, by and between the Company and Philip
    J. Young (incorporated by reference to Exhibit 10.15 to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                                                   
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.16+        |  | Amendment No. 1 to Employment Agreement, dated as of June 25, 2013, by and between the Company
    and Philip J. Young (incorporated by reference to Exhibit 10.16 to the Registration Statement on Form 10 filed December 16,
    2013).                                                                                                               
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.17+        |  | Offer of Employment, dated October 7, 2013, by and between the Company and Baxter Phillips,
    III (incorporated by reference to Exhibit 10.17 to the Registration Statement on Form 10 filed December 16, 2013).                                                                                                                                      
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.18*        |  | License Agreement, dated July 3, 2007, by and between the Company and United Kingdom Health
    Protection Agency, Centre for Emergency Preparedness and Response (incorporated by reference to Exhibit 10.18 to the Registration
    Statement on Form S-1 filed January 21, 2014).                                                                    
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.19         |  | Shareholder Sale Agreement, dated as of September 8, 2012, by and between the Company, Anthony
    Smithyman and Margaret Smithyman, AmpliPhi Australia Pty Ltd, Special Phage Holdings Pty Ltd, and the other parties listed
    therein (incorporated by reference to Exhibit 10.19 to the Registration Statement on Form S-1 filed January 21, 2014).
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.20         |  | Agreement and Plan of Merger, dated November 12, 2010, by and between the Company, Sheffield
    Acquisition 1, Inc., and Sheffield Acquisition 2, Inc. (incorporated by reference to Exhibit 10.20 to the Registration Statement
    on Form S-1 filed January 21, 2014).                                                                              
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.21+        |  | 2013 Stock Incentive Plan (incorporated by reference to Exhibit 10.21 to Amendment No. 2
    to the Registration Statement on Form 10 filed April 15, 2014).                                                                                                                                                                                            
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|10.22         |  | Agreement of Lease of Business Premises, dated as of February 21, 2014, by and between Avotehna
    d.d. and Ampliphi, Biotehnološke Raziskave in Razvoj, d. o. o. (incorporated by reference to Exhibit 10.22 to Amendment
    No. 2 to the Registration Statement on Form 10 filed April 15, 2014).                                                   
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|21.1          |  | Subsidiaries of the registrant (incorporated by reference to Exhibit 21.1 to the Registration
    Statement on Form S-1 filed January 21, 2014).                                                                                                                                                                                                        
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|23.1†         |  | Consent of PBMares LLP, independent registered public accounting firm.                                                                                                                                                                                                                                                                                  
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|24.1†         |  | Power of Attorney (contained on the signature page).                                                                                                                                                                                                                                                                                                    
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|31.1†         |  | Certification of Chief Executive Officer Pursuant to Rule 13a-14(a)/15d-14(a).                                                                                                                                                                                                                                                                          
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|31.2†         |  | Certification of Chief Financial Officer Pursuant to Rule 13a-14(a)/15d-14(a).                                                                                                                                                                                                                                                                          
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|32.1†         |  | Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350.                                                                                                                                                                                                                                                                        
|              |  |                                                                                                                                                                                                                                                                                                                                                         
|32.2†         |  | Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350.                                                                                                                                                                                                                                                                        



| | † | Filed herewith.
| | - | ---------------



| | + | Indicates management contract or compensatory plan or arrangement.
| | - | ------------------------------------------------------------------



| | * | Indicates confidential treatment has been requested.
| | - | ----------------------------------------------------



67







SIGNATURES



Pursuant to the requirements of Section 13
or 15(d) 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.



| | AMPLIPHI BIOSCIENCES CORPORATION
| | --------------------------------
| |                                 
| | By:                             
| |                                 
| |                                 
| |                                 
| |                                 
| | Date: April 15, 2015            



SIGNATURES AND POWER OF ATTORNEY



KNOW ALL PERSONS BY THESE PRESENTS, that
each person whose signature appears below constitutes and appoints Jeremy Curnock Cook and David E. Bosher, and each of them,
as his or her true and lawful attorneys-in-fact and agents, each with full power of substitution and resubstitution, for him or
her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on
Form 10-K and to file the same, with all exhibits thereto and all documents in connection therewith, with the Securities
and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and
perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all that such attorneys-in-fact and agents or any
of them, or his or her or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof.



Pursuant to the requirements of the Securities
Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities
and on the dates indicated.



|SIGNATURE                       |  | TITLE                                                        |  | DATE          
|------------------------------- |  | ------------------------------------------------------------ |  | --------------
|                                |  |                                                              |  |               
|/s/ Jeremy
    Curnock Cook     |  | Interim Chief Executive Office and Chairman of the
    Board |  | April 15, 2015
|Jeremy Curnock Cook             |  |                                                              |  |               
|                                |  |                                                              |  |               
|/s/ David
    E. Bosher         |  | Chief Financial Officer                                      |  | April 15, 2015
|David E. Bosher                 |  | (Principal Financial and Accounting Officer)                 |  |               
|                                |  |                                                              |  |               
|/s/ Wendy S. Johnson            |  | Interim Chief Operating Officer and Director                 |  | April 15, 2015
|Wendy S. Johnson                |  |                                                              |  |               
|                                |  |                                                              |  |               
|/s/ Louis
    Drapeau           |  | Director                                                     |  | April 15, 2015
|Louis Drapeau                   |  |                                                              |  |               
|                                |  |                                                              |  |               
|/s/ Michael
    S. Perry, Ph.D. |  | Director                                                     |  | April 15, 2015
|Michael S. Perry, Ph.D.         |  |                                                              |  |               
|                                |  |                                                              |  |               
|/s/ Julian
    P. Kirk          |  | Director                                                     |  | April 15, 2015
|Julian P. Kirk                  |  |                                                              |  |               
|                                |  |                                                              |  |               
|/s/ Anthony M. Smithyman        |  | Director                                                     |  | April 15, 2015
|Anthony M. Smithyman            |  |                                                              |  |               



68