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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549



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FORM 10-Q



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



For the quarterly period ended June 30, 2005



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



For the transition period from
 to



Commission File Number 0-23155



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TRIMERIS, INC.

(Exact name of registrant as specified in its charter)



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



3500 Paramount
Parkway

Morrisville, North Carolina 27560

(Address of principal executive offices, including zip code)



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



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



|Indicate | by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange
|-------- | ------------------------------------------------------------------------------------------------------

|Act).    x  Yes ̈No | 
|------------------ | 



The number of shares outstanding of the registrants common stock as of August 1, 2005 was 21,958,650.



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##### Table of Contents

TR
IMERIS, INC.

FORM 10-Q



|               |  |                                                                                                |  |   
|-------------- |  | ---------------------------------------------------------------------------------------------- |  | --
|PART I.        |  | FINANCIAL INFORMATION                                                                          |  |   
|               |  |                                                                                               
|Item 1.        |  | Financial Statements                                                                           |  | 1 
|               |  |                                                                                               
|               |  | Balance Sheets as of June 30, 2005 (unaudited) and December 31, 2004                           |  | 1 
|               |  |                                                                                               
|               |  | Statements of Operations (unaudited) for the Three and Six Months Ended June 30, 2005 and 2004 |  | 2 
|               |  |                                                                                               
|               |  | Statements of Cash Flows (unaudited) for the Six Months Ended June 30, 2005 and 2004           |  | 3 
|               |  |                                                                                               
|               |  | Notes to Financial Statements (unaudited)                                                      |  | 4 
|               |  |                                                                                               
|Item 2.        |  | Managements Discussion and Analysis of Financial Condition and Results of Operations          |  | 10
|               |  |                                                                                               
|Item 3.        |  | Quantitative and Qualitative Disclosures About Market Risk                                     |  | 31
|               |  |                                                                                               
|Item 4.        |  | Controls and Procedures                                                                        |  | 32
|               |  |                                                                                               
|PART II.       |  | OTHER INFORMATION                                                                              |  |   
|               |  |                                                                                               
|Item 1.        |  | Legal Proceedings                                                                              |  | 32
|               |  |                                                                                               
|Item 2.        |  | Unregistered Sales of Equity Securities and Use of Proceeds                                    |  | 32
|               |  |                                                                                               
|Item 3.        |  | Defaults Upon Senior Securities                                                                |  | 32
|               |  |                                                                                               
|Item 4.        |  | Submission of Matters to a Vote of Security Holders                                            |  | 32
|               |  |                                                                                               
|Item 5.        |  | Other Information                                                                              |  | 32
|               |  |                                                                                               
|Item 6.        |  | Exhibits                                                                                       |  | 32
|               | 
|Signature Page |  | 33                                                                                            
|               | 
|Exhibit Index  |  | 34                                                                                            



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##### Table of Contents

PART I. FINANCIAL INFORMATION



Item 1. Financial Statements



TRIMERIS, INC.

BALANCE SHEETS

(in thousands, except par value)



|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------- | -------- | - | ----------------- | - | -------- | -
|                                                                                                                                                                        |  | June 30, 2005 |          |   | December 31, 2004 |  
|                                                                                                                                                                        |  | (unaudited)   |          |   |                   |  
|Assets                                                                                                                                                                  |  |               |          |   |                   |   |          |  
|Current assets:                                                                                                                                                         |  |               |          |   |                   |   |          |  
|Cash and cash equivalents                                                                                                                                               |  | $             | 28,818   |   |                   | $ | 28,101   |  
|Investment securities-available-for-sale                                                                                                                                |  |               | 14,282   |   |                   |   | 20,301   |  
|Recoverable franchise taxes                                                                                                                                             |  |               |         |   |                   |   | 144      |  
|Accounts receivable - Roche                                                                                                                                             |  |               | 2,064    |   |                   |   | 5,878    |  
|Other receivables                                                                                                                                                       |  |               | 11       |   |                   |   |         |  
|Prepaid expenses                                                                                                                                                        |  |               | 879      |   |                   |   | 1,630    |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Total current assets                                                                                                                                                    |  |               | 46,054   |   |                   |   | 56,054   |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Property, furniture and equipment, net                                                                                                                                  |  |               | 2,287    |   |                   |   | 2,408    |  
|Other assets:                                                                                                                                                           |  |               |          |   |                   |   |          |  
|Patent costs, net                                                                                                                                                       |  |               | 2,117    |   |                   |   | 1,829    |  
|Advanced payment - Roche                                                                                                                                                |  |               | 5,318    |   |                   |   | 4,498    |  
|Deposits and other assets                                                                                                                                               |  |               | 1,061    |   |                   |   | 31       |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Total other assets                                                                                                                                                      |  |               | 8,496    |   |                   |   | 6,358    |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Total assets                                                                                                                                                            |  | $             | 56,837   |   |                   | $ | 64,820   |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Liabilities and Stockholders Equity                                                                                                                                    |  |               |          |   |                   |   |          |  
|Current liabilities:                                                                                                                                                    |  |               |          |   |                   |   |          |  
|Accounts payable                                                                                                                                                        |  | $             | 588      |   |                   | $ | 1,424    |  
|Accrued compensation                                                                                                                                                    |  |               | 2,642    |   |                   |   | 2,981    |  
|Deferred revenue - Roche                                                                                                                                                |  |               | 1,722    |   |                   |   | 2,185    |  
|Accrued expenses                                                                                                                                                        |  |               | 1,182    |   |                   |   | 260      |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Total current liabilities                                                                                                                                               |  |               | 6,134    |   |                   |   | 6,850    |  
|                                                                                                                                                                        |  |              
|Deferred revenue - Roche                                                                                                                                                |  |               | 11,338   |   |                   |   | 11,736   |  
|Accrued marketing costs                                                                                                                                                 |  |               | 16,129   |   |                   |   | 15,761   |  
|Other liabilities                                                                                                                                                       |  |               | 524      |   |                   |   | 127      |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Total liabilities                                                                                                                                                       |  |               | 34,125   |   |                   |   | 34,474   |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Stockholders equity:                                                                                                                                                   |  |               |          |   |                   |   |          |  
|Preferred stock at $.001 par value per share, 10,000 shares authorized, zero shares issued and outstanding at June 30, 2005 (unaudited) and
December 31, 2004           |  |               |         |   |                   |   |         |  
|Common Stock at $.001 par value per share, 60,000 shares authorized, 21,956 and 21,917 shares issued and outstanding at June 30, 2005
(unaudited) and December 31, 2004 |  |               | 22       |   |                   |   | 22       |  
|Additional paid-in capital                                                                                                                                              |  |               | 403,657  |   |                   |   | 403,307  |  
|Accumulated deficit                                                                                                                                                     |  |               | (378,940 | ) |                   |   | (370,364 | )
|Deferred compensation                                                                                                                                                   |  |               | (2,026   | ) |                   |   | (2,613   | )
|Accumulated other comprehensive loss                                                                                                                                    |  |               | (1       | ) |                   |   | (6       | )
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Total stockholders equity                                                                                                                                              |  |               | 22,712   |   |                   |   | 30,346   |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  
|Total liabilities and stockholders equity                                                                                                                              |  | $             | 56,837   |   |                   | $ | 64,820   |  
|                                                                                                                                                                        |  |               |          |   |                   |   |          |  



See accompanying notes
to financial statements.





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##### Table of Contents

TRIMERIS, INC.

STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(unaudited)



|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|------------------------------------------------------ |  | --------------------------- | ------ | - | ------------------------ | - | ------- | ---- |  | - | ------ | - |  | - | ------- | -
|                                                       |  | Three Months Ended June 30, |        |   | Six Months EndedJune 30, |  
|                                                       |  | 2005                        |        |   | 2004                     |   |         | 2005 |  |   | 2004   |  
|Revenue:                                               |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Milestone revenue                                      |  | $                           | 430    |   |                          | $ | 534     |      |  | $ | 861    |   |  | $ | 1,060   |  
|Royalty revenue                                        |  |                             | 2,642  |   |                          |   | 1,109   |      |  |   | 4,403  |   |  |   | 1,910   |  
|Collaboration income (loss)                            |  |                             | 1,313  |   |                          |   | (9,850  | )    |  |   | 1,277  |   |  |   | (12,396 | )
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Total revenue and collaboration income (loss)          |  |                             | 4,385  |   |                          |   | (8,207  | )    |  |   | 6,541  |   |  |   | (9,426  | )
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Operating expenses:                                    |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Research and development:                              |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Non-cash compensation                                  |  |                             | 99     |   |                          |   | (2      | )    |  |   | 208    |   |  |   | (53     | )
|Other research and development expense                 |  |                             | 5,050  |   |                          |   | 5,382   |      |  |   | 10,397 |   |  |   | 11,682  |  
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Total research and development expense                 |  |                             | 5,149  |   |                          |   | 5,380   |      |  |   | 10,605 |   |  |   | 11,629  |  
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|General and administrative:                            |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Non-cash compensation                                  |  |                             | 112    |   |                          |   | 12      |      |  |   | 223    |   |  |   | 12      |  
|Other general and administrative expense               |  |                             | 2,317  |   |                          |   | 2,818   |      |  |   | 4,517  |   |  |   | 5,484   |  
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Total general and administrative expense               |  |                             | 2,429  |   |                          |   | 2,830   |      |  |   | 4,740  |   |  |   | 5,496   |  
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Total operating expenses                               |  |                             | 7,578  |   |                          |   | 8,210   |      |  |   | 15,345 |   |  |   | 17,125  |  
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Operating loss                                         |  |                             | (3,193 | ) |                          |   | (16,417 | )    |  |   | (8,804 | ) |  |   | (26,551 | )
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Other income (expense):                                |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Interest income                                        |  |                             | 318    |   |                          |   | 199     |      |  |   | 590    |   |  |   | 460     |  
|Gain on sale of equipment                              |  |                             | 6      |   |                          |   |        |      |  |   | 6      |   |  |   |        |  
|Interest expense                                       |  |                             | (185   | ) |                          |   | (2      | )    |  |   | (368   | ) |  |   | (5      | )
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Total other income (expense)                           |  |                             | 139    |   |                          |   | 197     |      |  |   | 228    |   |  |   | 455     |  
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Net loss                                               |  | $                           | (3,054 | ) |                          | $ | (16,220 | )    |  | $ | (8,576 | ) |  | $ | (26,096 | )
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Basic and diluted net loss per share                   |  | $                           | (0.14  | ) |                          | $ | (0.75   | )    |  | $ | (0.39  | ) |  | $ | (1.21   | )
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  
|Weighted average shares used in per share computations |  |                             | 21,727 |   |                          |   | 21,610  |      |  |   | 21,719 |   |  |   | 21,596  |  
|                                                       |  |                             |        |   |                          |   |         |      |  |   |        |   |  |   |         |  



See accompanying notes
to financial statements.



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TRIMERIS, INC.

STATEMENTS OF CASH FLOWS

(in thousands, unaudited)



|                                                                            |  |                          |        |   |      |   |         |  
|--------------------------------------------------------------------------- |  | ------------------------ | ------ | - | ---- | - | ------- | -
|                                                                            |  | Six Months EndedJune 30, |       
|                                                                            |  | 2005                     |        |   | 2004 |  
|Cash flows from operating activities:                                       |  |                          |        |   |      |   |         |  
|Net loss                                                                    |  | $                        | (8,576 | ) |      | $ | (26,096 | )
|Adjustments to reconcile net loss to net cash used by operating activities: |  |                          |        |   |      |   |         |  
|Depreciation and amortization of property, furniture and equipment          |  |                          | 394    |   |      |   | 706     |  
|Gain on sale of equipment                                                   |  |                          | (6     | ) |      |   |        |  
|Other amortization                                                          |  |                          | 31     |   |      |   | 29      |  
|Amortization of deferred revenue - Roche                                    |  |                          | (861   | ) |      |   | (1,060  | )
|Non-cash compensation                                                       |  |                          | 431    |   |      |   | (41     | )
|Decrease (increase) in assets:                                              |  |                          |        |   |      |   |         |  
|Accounts receivable - Roche                                                 |  |                          | 3,814  |   |      |   |        |  
|Other receivables                                                           |  |                          | (11    | ) |      |   | 1       |  
|Recoverable franchise taxes                                                 |  |                          | 144    |   |      |   |        |  
|Prepaid expenses                                                            |  |                          | 751    |   |      |   | 1,013   |  
|Patent costs expensed                                                       |  |                          | 82     |   |      |   |        |  
|Advanced payment - Roche                                                    |  |                          | (820   | ) |      |   | (4,007  | )
|Deposits and other assets                                                   |  |                          | (1,030 | ) |      |   | 8       |  
|Increase (decrease) in liabilities:                                         |  |                          |        |   |      |   |         |  
|Accounts payable                                                            |  |                          | (836   | ) |      |   | 177     |  
|Accounts payable - Roche                                                    |  |                          |       |   |      |   | (1,011  | )
|Accrued compensation                                                        |  |                          | (339   | ) |      |   | 1,225   |  
|Accrued expenses                                                            |  |                          | 922    |   |      |   | (30     | )
|Accrued marketing costs                                                     |  |                          | 368    |   |      |   | 3,678   |  
|Deferred revenue - Roche                                                    |  |                          |       |   |      |   | 750     |  
|Other liabilities                                                           |  |                          | 397    |   |      |   |        |  
|                                                                            |  |                          |        |   |      |   |         |  
|Net cash used by operating activities                                       |  |                          | (5,145 | ) |      |   | (24,658 | )
|                                                                            |  |                          |        |   |      |   |         |  
|Cash flows from investing activities:                                       |  |                          |        |   |      |   |         |  
|Purchases of investment securities - available-for-sale                     |  |                          | (9,042 | ) |      |   | (55,655 | )
|Maturities of investment securities - available-for-sale                    |  |                          | 15,066 |   |      |   | 65,027  |  
|Proceeds from the sale of equipment                                         |  |                          | 6      |   |      |   |        |  
|Purchases of property and equipment                                         |  |                          | (273   | ) |      |   | (712    | )
|Patent costs                                                                |  |                          | (401   | ) |      |   | (136    | )
|                                                                            |  |                          |        |   |      |   |         |  
|Net cash provided by investing activities                                   |  |                          | 5,356  |   |      |   | 8,524   |  
|                                                                            |  |                          |        |   |      |   |         |  
|Cash flows from financing activities:                                       |  |                          |        |   |      |   |         |  
|Principal payments under capital lease obligations                          |  |                          |       |   |      |   | (180    | )
|Proceeds from employee stock purchase plan exercise                         |  |                          | 85     |   |      |   | 111     |  
|Proceeds from exercise of stock options                                     |  |                          | 421    |   |      |   | 291     |  
|                                                                            |  |                          |        |   |      |   |         |  
|Net cash provided by financing activities                                   |  |                          | 506    |   |      |   | 222     |  
|                                                                            |  |                          |        |   |      |   |         |  
|Net increase (decrease) in cash and cash equivalents                        |  |                          | 717    |   |      |   | (15,912 | )
|Cash and cash equivalents, beginning of period                              |  |                          | 28,101 |   |      |   | 45,285  |  
|                                                                            |  |                          |        |   |      |   |         |  
|Cash and cash equivalents, end of period                                    |  | $                        | 28,818 |   |      | $ | 29,373  |  
|                                                                            |  |                          |        |   |      |   |         |  



See accompanying notes
to financial statements



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##### Table of Contents

TRIMERIS, INC.

NOTES TO FINANCIAL STATEMENTS

(unaudited)



1. BASIS OF
PRESENTATION



Trimeris, Inc. (the Company) was
incorporated on January 7, 1993 in Delaware, to discover and develop novel therapeutic agents that block viral infection by inhibiting viral fusion with host cells. Prior to April 1, 2003, the financial statements were prepared in accordance with
Statement of Financial Accounting Standards (SFAS) No. 7, Accounting and Reporting by Development Stage Enterprises, to recognize the fact that the Company was devoting substantially all of its efforts to establishing a new
business. Principal operations commenced with the commercial launch of Fuzeon®on March
27, 2003, and revenue was recognized from the sale of Fuzeon during the year ended December 31, 2003. As a result, beginning on April 1, 2003, the Company no longer prepares its financial statements in accordance with SFAS No. 7.



The Company has a worldwide agreement with F. Hoffmann-La Roche Ltd., or
Roche, to develop and market T-20, marketed as Fuzeon, whose generic name is enfuvirtide, and T-1249, or a replacement compound. Fuzeon is manufactured and distributed by Roche through Roches sales and distribution network throughout the world
in countries where regulatory approval has been received. The Company shares gross profits equally from the sale of Fuzeon in the United States and Canada with Roche, and receives a royalty based on net sales of Fuzeon outside the United States and
Canada.



The accompanying unaudited financial statements have
been prepared in accordance with accounting principles generally accepted in the United States of America and applicable Securities and Exchange Commission (the SEC) regulations for interim financial information. Certain information and
footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to the SEC rules and regulations. In the
opinion of management, all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of financial position and results of operations have been made. Operating results for interim periods are not necessarily
indicative of results, which may be expected for a full year. The information included in this Form 10-Q should be read in conjunction with the Risk Factors and Managements Discussion and Analysis of Financial Condition and
Results of Operations sections and the 2004 financial statements and notes thereto included in the Companys 2004 Annual Report on Form 10-K for the year ended December 31, 2004 filed with the SEC on March 11, 2005.



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



The Company has a collaboration agreement with Roche, which accounted for 100% of the Companys royalty revenue for the six months ended June 30,
2005 and 2004. This agreement with Roche also provides the basis for substantially all of the Companys results from the collaboration.



Certain prior year amounts have been reclassified to conform to current year presentation. These reclassifications had no impact on net loss or
stockholders equity as previously reported. The Company reclassified $24.8 million of auction rate securities from cash and cash equivalents to investment securities-available-for-sale, as of June 30, 2004. Accordingly, the Company reflected
additional purchases of investment securities  available-for-sale and additional maturities of investment securities-available-for-sale for the six months ended June 30, 2004. The Company also reclassified $3.7 million of accrued marketing
costs from financing activities to operating activities in the statement of cash flows for the six months ended June 30, 2004.



2. BASIC NET INCOME (LOSS) PER SHARE



In accordance with SFAS No. 128, Earnings Per Share, basic loss per common share is calculated by dividing net loss by the weighted-average
number of common shares outstanding for the period after certain adjustments described below. Diluted net income per common share reflects the maximum dilutive effect of common stock issuable upon exercise of stock options, restricted stock, stock
warrants, and conversion of preferred stock. Diluted net loss per common share is not shown, as common equivalent shares from stock options, restricted stock grants and stock warrants, would have an anti-dilutive effect. At June 30, 2005, there were
3,377,000 options to purchase common stock, 169,000 restricted stock grants, which become fully vested in 2007, 50,000 restricted stock grants, which become fully vested in 2008 and 362,000 warrants to purchase common stock outstanding. At June 30,
2004, there were 2,996,000 options to purchase common stock, 191,500 restricted stock grants which become fully vested in 2007 and 362,000 warrants to purchase common stock outstanding.



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##### Table of Contents

3. STATEMENTS OF CASH FLOWS



No interest expense was paid during the six months ended June 30, 2005. Interest of approximately $5,000 was paid during the six months ended June 30,
2004.



For the six months ended June 30, 2005, approximately
$368,000 was charged to interest expense for the accretion of the liability resulting from the Companys share of estimated selling and marketing expenses under the collaboration agreement with Roche. The Company recorded a liability of $15.6
million during 2004, as part of collaboration loss, which represents the net present value of the Companys estimated share of these expenses, based on the expected timing and terms of payment under the amendment to the collaboration agreement
dated July 12, 2004.



No capital leases were incurred for the
six months ended June 30, 2005 or 2004.



Net unrealized gains
on investments securities-available-for-sale totaled approximately $5,000 during the six months ended June 30, 2005 and net unrealized losses on investment securities available-for-sale totaled $22,000 during the six month period ended June 30,
2004. Unrealized gains/losses are reported on the balance sheet as accumulated other comprehensive gain / (loss).



4. STOCKHOLDERS EQUITY



Changes in Additional Paid-In Capital



In June 2004, a grant of 191,500 shares of restricted stock was made to substantially all employees. A $2.7 million charge, equal to the market value of these shares on the grant date, was made to deferred
compensation and credited to additional paid-in capital. This deferred compensation will be charged to expense ratably over the three-year vesting period of the restricted stock. In September 2004, a grant of 50,000 shares of restricted stock was
made to the newly appointed Chief Executive Officer. A $575,000 charge, equal to the market value of these shares on the grant date, was made to deferred compensation and credited to additional paid-in capital. This deferred compensation will be
charged to expense ratably over the four-year vesting period of the restricted stock. Amortization expense, related to these restricted stock grants, in the amount of $449,000 and $20,000 was charged to non-cash compensation expense for the six
months ended June 30, 2005 and 2004, respectively.



A change in
additional paid-in capital during the six months ended June 30, 2005 was $18,000 related to expense reversal of non-cash compensation charges. A change in additional paid-in capital during the six months ended June 30, 2004 was $61,000 related to
expense reversal of non-cash compensation charges. This decrease in the expense resulted primarily due to the decrease in the market price of our stock from December 31, 2004 to June 30, 2005 and from December 31, 2003 to June 30, 2004,
respectively.



5. ROCHE COLLABORATION



Collaboration Agreement



In July 1999, the Company entered into a worldwide agreement with F.
Hoffman-La Roche Ltd., or Roche, to develop and commercialize T-20, currently marketed as Fuzeon, whose generic name is enfuvirtide, and T-1249, or a replacement compound. Research, or the discovery of compounds is generally distinct from the
advanced testing of these compounds, a process referred to herein as development. Development expenses typically include certain clinical and pre-clinical studies performed on a clinical candidate compound, as well as post-marketing commitments
related to approved drugs. In the Companys collaboration with Roche, the discovery of compounds that may become clinical candidates is governed by a separate research agreement and the work by the parties is performed according to an agreed
upon research plan. The research agreement itself does not require that a specific amount be spent on any annual research plan. Either party has the option to supplement the budgeted research plan at their own expense. At present the Company is
still in discussions with Roche to finalize the specific activities to be carried out under the research plan and the associated budget for 2005, together with the relative obligations of the parties with respect to expenses incurred in 2005 under
the research plan. While the Companys development agreement with Roche covers the commercialization of Fuzeon, T-1249 or a replacement product, to date only Fuzeon is commercially available. At present, the Company and Roche contribute towards
the selling and marketing of Fuzeon in the United States and Canada, with each party bearing certain costs according to terms of our agreement. Gross profits from the sale of Fuzeon are shared equally. Outside of these two countries, Roche will fund
all development and commercialization costs for Fuzeon and pay the Company royalties on net sales of Fuzeon products.



Roche made a nonrefundable initial cash payment to the Company of $10 million during 1999, and a milestone payment of $2 million in 2000. The Company
recorded an $8 million milestone in March 2003, a $5 million milestone in



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May 2003, a $2.5 million milestone in June 2003 and a $750,000 milestone in June 2004. The June 2004 milestone has been recorded as the parties have agreed
that certain performance has been met and that payment is appropriate. We have recorded the June 2004 milestone on the basis that we will reach a final agreement with terms substantially the same as those we have agreed to in principle. Roche will
provide up to an additional $33 million in cash upon achievement of developmental, regulatory and commercial milestones. This agreement with Roche grants them an exclusive, worldwide license for Fuzeon and T-1249, and certain other compounds. Under
this agreement with Roche, a joint management committee consisting of members from Trimeris and Roche oversees the strategy for the collaboration. Roche may terminate its license for a particular country in its sole discretion with advance notice.
This agreement with Roche gives Roche significant control over important aspects of the commercialization of Fuzeon and our other drug candidates, including but not limited to pricing, sales force activities, and promotional activities.



In July 1999, the Company granted Roche a warrant to purchase 362,000
shares of common stock at a purchase price of $20.72 per share. The warrant is exercisable prior to the tenth annual anniversary of the grant date and was not exercised as of June 30, 2005. The fair value of the warrant of $5.4 million was credited
to additional paid-in capital in 1999, and as a reduction of the $10 million up-front payment received from Roche. The Company deferred $4.6 million, the net of the $10 million up-front payment and the $5.4 million in warrants, over the research and
development period. The value was calculated using the Black-Scholes option-pricing model using the following assumptions: estimated dividend yield of 0%; expected stock price volatility of 86.00%; risk-free interest rate of 5.20%; and expected
option life of ten years.



Roche is manufacturing Fuzeon bulk
drug substance in its Boulder, Colorado facility. Roches manufacturing facility in Basel, Switzerland is producing the finished drug product from such bulk drug substance. Fuzeon is distributed and sold by Roche through Roches sales and
distribution network throughout the world in countries where regulatory approval has been received.



Product sales of Fuzeon began in the United States on March 27, 2003 and are recorded by Roche. Under the collaboration agreement with Roche, the Company
shares gross profits equally from the sale of Fuzeon in the United States and Canada with Roche, which is reported as collaboration income (loss) in the Statements of Operations as a component of revenue. Collaboration income (loss) is calculated as
follows: Total gross sales of Fuzeon in the United States and Canada is reduced by any discounts, returns or rebates resulting in total net sales. Net sales are reduced by costs of goods sold resulting in gross profit. Gross profit is reduced by
selling, marketing and other expenses related to the sale of Fuzeon, resulting in operating income or loss. The Companys share of the operating income or loss is reported as collaboration income or loss as a component of revenue. Total net
sales of Fuzeon in the United States and Canada were $48.5 million and $40.4 million during the six months ended June 30, 2005 and 2004, respectively. During the six months ended June 30, 2005 the gross profit from the sale of Fuzeon exceeded sales,
marketing and other expenses resulting in the Companys share of operating income from the sale of Fuzeon in the United States and Canada of $1.3 million. During the six months ended June 30, 2004, sales, marketing and other expenses exceeded
the gross profit from the sale of Fuzeon resulting in the Companys share of operating loss of $12.4 million. Roche previously had an exclusive distribution arrangement with Bioscrip, Inc. (Bioscrip) formerly known as Chronimed,
Inc. to distribute Fuzeon in the United States during 2003. This exclusive arrangement terminated on April 26, 2004. Effective April 26, 2004, Fuzeon became available through retail and specialty pharmacies across the U.S. Prior to April 26, 2004,
revenue from product sales had been recognized when title and risk of loss had passed to Bioscrip, which was when Bioscrip allocated drug for shipment to a patient. Beginning April 26, 2004, revenue is recognized when Roche ships drug and title and
risk of loss passes to wholesalers.



The Company and Roche
agreed to limit the Companys actual cash contribution to the Fuzeon selling and marketing expenses in 2004 to approximately $10 million, even though Roche spent significantly more on these expenses. If certain cumulative levels of sales for
Fuzeon in the United States and Canada are achieved, the Companys share of the additional expenses incurred by Roche during 2004 will be payable to Roche beginning at a future date over several years from that future date. The Company
currently estimates this date to be in 2011. During the year ended December 31, 2004, the Companys share of selling and marketing expenses exceeded $10 million. As a result the Company included an additional charge under collaboration loss to
reflect the repayment of this excess according to the terms of the agreement with Roche. During 2004 the Company recorded $15.6 million as part of collaboration loss, which represented the net present value of the Companys estimated share of
the expenses that were in excess of (approximately) $10 million. This amount was arrived at taking into account the expected timing and terms of payment under the agreement. For the six months ended June 30, 2005, Trimeris has recorded its
anticipated share of selling and marketing expenses in accordance with terms and conditions of an agreement we executed with Roche in May of 2005.



Under the collaboration agreement with Roche, the Company contributes towards a share of the capital invested in Roches manufacturing facility
through the depreciation charged to cost of goods sold as the products are sold. Through a series of negotiations, the Company has reached an understanding in principle with Roche whereby the Company will pay



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Roche for its share of the capital invested in Roches manufacturing facility over a seven-year period. The Company is in the process of formalizing
these terms in a written agreement. Trimeris anticipated share of this capital investment is approximately $14 million. As a result, we accrued an initial payment of $4 million at June 2004 and expect to pay approximately $500,000 per quarter
through June 2009. As a result, Roche will no longer include the depreciation related to the manufacturing facility in the cost of goods sold. In the event our collaboration agreement is terminated, we would not be obligated for any unpaid amounts
for capital investment.



These payments, net of the portion
allocated to cost of goods sold, are recorded as an asset presented as Advanced payment  Roche. This asset will be amortized based on the units of Fuzeon sold during the collaboration period, in order to properly allocate the
capital investment to cost of goods sold in future periods. Assuming all payments are made and sales of Fuzeon continue, the Company estimates that this asset has a remaining useful life of approximately 11 years. In addition, other peptide drug
candidates discovered under our collaboration with Roche can be manufactured using the same Roche facility. The carrying value of this asset will be evaluated annually for impairment or if a triggering event occurs.



The Companys share of the collaboration income for the six months ended
June 30, 2005 includes approximately $1.0 million in inventory write-offs and adjustments for the carrying value of impaired equipment charged to the Company by Roche at the Boulder manufacturing facility.



Research Agreement



Research, or the discovery of compounds is generally distinct from the advanced testing of these compounds, a process
referred to herein as development. Development expenses typically include certain clinical and pre-clinical studies performed on a clinical candidate compound, as well as post-marketing commitments related to approved drugs. In the Companys
collaboration with Roche, the discovery of compounds that may become clinical candidates is governed by a separate research agreement and the work by the parties is performed according to an agreed upon research plan. In 2001, the Company entered
into the research agreement with Roche to discover, develop and commercialize novel generations of HIV fusion inhibitor peptides. Roche and Trimeris will fund worldwide research, development and commercialization costs, and will share equally in
gross profits from worldwide sales of new HIV fusion inhibitor peptides discovered after July 1, 1999. The joint research obligations under the agreement are renewable thereafter on an annual basis. The research term of this agreement was extended
to December 2005 during 2003. The research agreement itself does not require that a specific amount be spent on any annual research plan. Either party has the option to supplement the budgeted research plan at their own expense. At present, the
Company is still in discussions with Roche to finalize the specific activities to be carried out under the research plan and the associated budget for 2005, together with the relative obligations of the parties with respect to expenses incurred in
2005 under the research plan.



6. COMPREHENSIVE LOSS



SFAS No. 130, Reporting Comprehensive Income, establishes rules
for the reporting and display of comprehensive income or loss and its components. SFAS No. 130 requires that unrealized gains or losses on the Companys available-to-sale securities be included in other comprehensive income. Comprehensive
income (loss) totaled ($8.57 million) for the six months ended June 30, 2005, and ($26.12 million) for the six months ended June 30, 2004. For the Company, other comprehensive income (loss) for the six months ended June 30, 2005 consists of our net
loss of $8.58 million and unrealized gains on investment securities available-for-sale of $5,000.



7. STOCK BASED COMPENSATION



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



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



SFAS No. 123 permits entities to recognize as expense over the vesting period the fair value of all stock-based awards on the date of grant.
Alternatively, SFAS No. 123 also allows entities to continue to apply the provisions of APB Opinion



7



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##### Table of Contents

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



|                                                       |  |                             |        |   |                           |   |         |      |  |   |         |   |  |   |         |  
|------------------------------------------------------ |  | --------------------------- | ------ | - | ------------------------- | - | ------- | ---- |  | - | ------- | - |  | - | ------- | -
|                                                       |  | Three Months Ended June 30, |        |   | Six Months Ended June 30, |  
|                                                       |  | 2005                        |        |   | 2004                      |   |         | 2005 |  |   | 2004    |  
|Net loss:                                              |  |                             |        |   |                           |   |         |      |  |   |         |   |  |   |         |  
|As reported                                            |  | $                           | (3,054 | ) |                           | $ | (16,220 | )    |  | $ | (8,576  | ) |  | $ | (26,096 | )
|Compensation cost recorded under APB Opinion No. 25    |  |                             | 217    |   |                           |   |        |      |  |   | 449     |   |  |   | 20      |  
|Compensation cost resulting from common stock options, |  |                             |        |   |                           |   |         |      |  |   |         |   |  |   |         |  
|restricted stock and employee stock purchase plan      |  |                             | (1,658 | ) |                           |   | (2,274  | )    |  |   | (3,448  | ) |  |   | (5,341  | )
|                                                       |  |                             |        |   |                           |   |         |      |  |   |         |   |  |   |         |  
|Pro forma                                              |  | $                           | (4,495 | ) |                           | $ | (18,494 | )    |  | $ | (11,575 | ) |  | $ | (31,417 | )
|                                                       |  |                             |        |   |                           |   |         |      |  |   |         |   |  |   |         |  
|                                                       |  |                             |        |  
|Basic and diluted loss per share:                      |  |                             |        |   |                           |   |         |      |  |   |         |   |  |   |         |  
|As reported                                            |  | $                           | (0.14  | ) |                           | $ | (0.75   | )    |  | $ | (0.39   | ) |  | $ | (1.21   | )
|Pro forma                                              |  | $                           | (0.21  | ) |                           | $ | (0.86   | )    |  | $ | (0.53   | ) |  | $ | (1.45   | )



The fair value of
common stock options is estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions used for each year, 2005 and 2004:



|                                                      |  |  |        
|----------------------------------------------------- |  |  | -------
|Estimated dividend yield                              |  |  | 0.00%  
|Expected stock price volatility                       |  |  | 45.0%  
|Risk-free interest rate                               |  |  | 3.50%  
|Expected life of options                              |  |  | 5 years
|Expected life of employee stock purchase plan options |  |  | 2 years



In December 2004, SFAS
No. 123 (revised), Share-Based Payment, was issued. SFAS No. 123 (revised) requires that the cost resulting from all share-based payment transactions be recognized as a charge in the financial statements. This statement establishes fair
value as the measurement objective in accounting for share-based payment arrangements and requires all entities to apply a fair-value-based measurement method in accounting for share-based payment transactions with employees except for equity
instruments held by employee share ownership plans. This statement also establishes fair value as the measurement objective for transactions in which an entity acquires goods or services from non-employees in share-based payment transactions. This
statement amends FASB Statement No. 95, Statement of Cash Flows, to require that excess tax benefits be reported as a financing cash inflow rather than as a reduction of taxes paid. This Statement replaces FASB Statement No. 123, Accounting for
Stock-Based Compensation, and supersedes APB Opinion No. 25, Accounting for Stock Issued to Employees. SFAS No. 123 (revised) was initially effective as of the beginning of the first interim or annual reporting period that begins after June 15,
2005. In April 2005, the SEC announced an amendment to the compliance date from the next reporting period beginning after June 15, 2005 to the next fiscal year beginning after June 15, 2005. The Company is assessing the impact of this statement on
its financial statements.



8. POST-RETIREMENT HEALTH INSURANCE CONTINUATION
PLAN



In June 2001, the Company adopted a post-retirement
health insurance continuation plan (the Plan). Employees who have achieved the eligibility requirements of 60 years of age and 10 years of service are eligible to participate in the Plan. The Plan provides participants the opportunity to
continue participating in the Companys group health plan after their date of retirement. Participants will pay the cost of health insurance premiums for this coverage, less any contributions by the Company.



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The components of net periodic post-retirement benefits cost of the Plan for the six months ended June
30, consisted of the following (in thousands):



|                                     |  |                            |     |                          |      |   |      |  |   |      |   |  |   |   
|------------------------------------ |  | -------------------------- | --- | ------------------------ | ---- | - | ---- |  | - | ---- | - |  | - | --
|                                     |  | Three Months EndedJune 30, |     | Six Months EndedJune 30,
|                                     |  | 2005                       |     |                          | 2004 |   | 2005 |  |   | 2004
|Service cost                         |  |                            | $18 |                          |      | $ | 57   |  | $ | 36   |   |  | $ | 68
|Interest cost                        |  |                            | 4   |                          |      |   | 12   |  |   | 8    |   |  |   | 15
|Recognized net actuarial gain (loss) |  |                            | (4  | )                        |      |   |     |  |   | (8   | ) |  |   |  
|Amortization of prior service costs  |  |                            | 6   |                          |      |   | 11   |  |   | 12   |   |  |   | 12
|                                     |  |                            |     |                          |      |   |      |  |   |      |   |  |   |   
|Total                                |  | $                          | 24  |                          |      | $ | 80   |  | $ | 48   |   |  | $ | 95
|                                     |  |                            |     |                          |      |   |      |  |   |      |   |  |   |   



The accumulated
post-retirement benefit obligation, or APBO, was determined using a discount rate of 6.00% and 6.25% at December 31, 2004 and 2003, respectively. A 1% increase in the assumed medical care cost trend rate increases the accumulated post-retirement
benefit obligation by approximately $160,000 and would increase the service and interest cost components by approximately $56,000. A 1% decrease in the trend factors would decrease the projected APBO by approximately $120,000 and would decrease the
service and interest cost components by approximately $42,000.



The expected
future benefit payments under the plan (in thousands) are as follows:



The
expected future benefit payments under the plan (in thousands) are as follows:



|                            |  |        |   
|--------------------------- |  | ------ | --
|Year(s) ending December 31: |  | Amount
|2005                        |  | $      |  
|2006                        |  |        |  
|2007                        |  |        |  
|2008                        |  |        | 1 
|2009                        |  |        | 3 
|2010 to 2014                |  |        | 84
|                            |  |        |   
|Total                       |  | $      | 88
|                            |  |        |   



9. COMMITMENTS AND CONTINGENCIES



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



As of June 30, 2005, the Company had commitments of approximately $940,000 to
purchase product candidate materials and fund various clinical studies over the next twenty-four months contingent on delivery of the materials or performance of the services. Substantially all of these expenditures will be shared equally by Roche
under the Companys collaboration agreement with Roche. Under the collaboration agreement, Trimeris and Roche are obligated to share equally the future development expenses for Fuzeon and T-1249 or a follow on compound for the United States and
Canada. We also expect to have capital expenditures of approximately $800,000 during the remainder of 2005 that will not be shared with Roche. We may finance these expenditures with capital or operating leases, debt or working capital.



In 2004, the Company entered into a sublease agreement for its office and
laboratory space in Morrisville, North Carolina. The sublease calls for the payment of a security deposit of $754,000, accrued for at June 30, 2005.



The minimum payments under this lease are as follows (in thousands):



|                         |  |   |       
|------------------------ |  | - | ------
|Year ending December 31: |  |  
|2005 remaining           |  | $ | 450   
|2006                     |  |   | 1,508 
|2007                     |  |   | 1,508 
|2008                     |  |   | 1,538 
|2009                     |  |   | 1,569 
|Thereafter               |  |   | 8,473 
|                         |  |   |       
|                         |  | $ | 15,046
|                         |  |   |       



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



This discussion of our financial condition and the results of operations should be read together with the financial statements and notes contained
elsewhere in this Form 10-Q. Certain statements in this section and other sections of this Form 10-Q are forward-looking. While we believe these statements are accurate, our business is dependent on many factors, some of which are discussed in the
Risk Factors and Business sections of our Annual Report on Form 10-K for the year ended December 31, 2004 filed with the SEC on March 11, 2005. These factors include, but are not limited to:



| |  |  | that if Fuzeon does not maintain or increase its market acceptance, our business will be materially harmed;
| | - |  | -----------------------------------------------------------------------------------------------------------



| |  |  | that Roche has significant inventory of both finished product and raw materials on hand, if Fuzeon sales do not increase we could face the risk of significant write-offs;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | that we have sustained losses since our inception, and expect our losses to continue;
| | - |  | -------------------------------------------------------------------------------------



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



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



| |  |  | that in order to become profitable we will need to maintain arrangements with third parties for the sale, marketing and distribution of our current and future drug candidates or
expend significant resources to develop these capabilities;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | that if sufficient amounts of Fuzeon and or any other drugs we attempt to bring to market cannot be manufactured on a cost-effective basis, our financial condition and results of
operations will be materially and adversely affected;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | that we do not control the manufacturing and production schedule at Roches Boulder facility where Fuzeon is manufactured and that we cannot ensure that significant costs
associated with scheduling decisions will not be incurred;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | that we are currently in the process of finalizing an amendment to our collaboration agreement with Roche that addresses several significant payments we have made and will make in
the future and we cannot guarantee that these negotiations will lead to a final agreement;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | that if Roche does not re-new or materially modifies our current research agreement to discover, develop and commercialize novel fusion inhibitors, we may not be able to proceed
with the development of our most promising candidates;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | that we may not be able to effectively develop our drug pipeline;
| | - |  | -----------------------------------------------------------------



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



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



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



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



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



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



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



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



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



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



| |  |  | that we depend on patents and proprietary rights, which may offer only limited exclusive protection and do not protect against infringement, and if we are unable to protect our
patents and proprietary rights, our assets and business could be materially harmed;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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



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



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



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



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



| |  |  | that if we are unable to meet or maintain the standards for maintaining internals controls over financial reporting as required by the Sarbanes-Oxley Act of 2002, our stock price
could be materially harmed;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | that we rely on our collaborative partner Roche to timely deliver important financial information relating to Fuzeon sales and expenses. In the event that this information is
inaccurate, incomplete or not timely we will not be able to meet our financial reporting obligations as required by the SEC;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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



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



Many of these
factors are beyond our control and any of these and other factors could cause actual clinical and financial results to differ materially from the forward-looking statements made in this Form 10-Q. The results of our previous clinical trials are not
necessarily indicative of the results of future clinical trials. Please read the Risk Factors section of our Annual Report on Form 10-K for the year ended December 31, 2004 filed with the SEC on March 11, 2005. We undertake no obligation
to release publicly the results of any revisions to the statements contained in this Form 10-Q to reflect events or circumstances that occur subsequent to the date hereof.



OVERVIEW



Trimeris is a biopharmaceutical company engaged in the discovery, development and commercialization of novel therapeutic agents for the treatment of viral
disease. The core technology platform of fusion inhibition is based on blocking viral entry into host cells. FUZEON, approved in the U.S., Canada and European Union, is the first in a new class of anti-HIV drugs called fusion inhibitors. Trimeris is
developing FUZEON and future generations of peptide fusion inhibitors in collaboration with F. Hoffmann-La Roche Ltd, or Roche.



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In order to enhance our performance, management is addressing several critical success factors. These
critical success factors are broken down into short-term and mid-to long-term.



Short  Term Critical Success Factors and Initiatives:



Work to increase the market acceptance of Fuzeon: Fuzeon is delivered twice daily through subcutaneous injections. Injection site reactions are the most common adverse event associated with the use of Fuzeon.
Management believes that aversion to twice daily injections and the potential for injection site reactions are the primary impediments to increasing the market acceptance of Fuzeon. We, together with Roche, are working on several initiatives to
increase the market penetration of Fuzeon including:



| |  | Alternative delivery methods aimed at improving acceptance of subcutaneous injections and reducing injection site reactions;
|- |  | ----------------------------------------------------------------------------------------------------------------------------



| |  | Nursing programs to help facilitate patient self-administration of and persistency on Fuzeon; and
|- |  | -------------------------------------------------------------------------------------------------



| |  | Medical Education and promotional programs focusing on the appropriate use of Fuzeon for patients with ongoing viral replication who have been exposed to drugs from the three other
anti-HIV classes (so-called third-line patients and beyond).
|- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Focusing our research and development efforts: We, together with our partner Roche, are currently researching several promising HIV gp41 peptide inhibitors, with the hope of selecting one of these peptides for
advanced pre-clinical studies. We have identified a lead candidate and back-up candidate that will proceed to advanced formulation studies and preliminary toxicology studies. The results of these studies will determine how rapidly we move towards
naming a clinical candidate.



Managing our resources and
liquidity: We ended the second quarter with $43.1 million in cash, cash equivalents and investment securitiesavailable-for-sale. Under the current operating environment, excluding any extraordinary items, based on current sales levels of
Fuzeon, we believe that this will be sufficient to support our operations through 2006. We will continue to evaluate opportunities to increase our liquidity. We will also continue to look for opportunities to increase our operational effectiveness.



Our people: Our people are very important to the
operations of our business. Our success depends on the continued services and on the performance of our senior management and staff. In 2005, we will continue to create a culture of trust that values employee contributions and recognizes and rewards
open communication, accountability and achievement.



Mid to Long -
Term Critical Success Factors and Initiatives



Enhance
development of our product pipeline: The focus on our next generation peptide, as mentioned above, is one aspect to the development of our pipeline. We will also look to business development to strengthen our pipeline primarily through
acquisitions and in licensing of research programs and clinical stage products.



Overview of Roche Relationship



In July 1999,
the Company entered into a worldwide agreement with F. Hoffman-La Roche Ltd., or Roche, to develop and commercialize T-20, currently marketed as Fuzeon, whose generic name is enfuvirtide, and T-1249, or a replacement compound. Research, or the
discovery of compounds is generally distinct from the advanced testing of these compounds, a process referred to herein as development. Development expenses typically include certain clinical and pre-clinical studies performed on a clinical
candidate compound, as well as post-marketing commitments related to approved drugs. In the Companys collaboration with Roche, the discovery of compounds that may become clinical candidates is governed by a research agreement and the work by
the parties is performed according to an agreed upon research plan. The research agreement itself does not require that a specific amount be spent on any annual research plan. Either party has the option to supplement the budgeted research plan at
their own expense.



At present, the Company is in on-going
discussions with Roche to finalize the specific activities to be carried out under the research plan and the associated budget for 2005, together with the relative obligations of the parties with respect to expenses incurred in 2005 under the
research plan. While the Companys development agreement with Roche covers the commercialization of Fuzeon, T-1249 or a replacement product, to date only Fuzeon is commercially available. The Company and Roche contribute towards the selling and
marketing of Fuzeon in the United States and Canada, with each party bearing certain costs according to terms of our agreement. Gross profits from the sale of Fuzeon are shared equally. Outside of these two countries, Roche funds all development and
commercialization costs for Fuzeon and pays the Company royalties on net sales of Fuzeon products.



12



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##### Table of Contents

Development costs for these compounds are incurred by both Roche and Trimeris. Quarterly, the Companies
reconcile the amounts expended and one party pays the other party on a 50/50 basis. Roche holds the Investigational New Drug Application, or IND, for Fuzeon and is responsible for all regulatory issues and communications with the Food and Drug
Administration or FDA. Roche also holds the New Drug Application (NDA) and is responsible for appropriate maintenance activities there as well.



Fuzeon was approved for commercialization in the United States in March 2003 and sales began in March 2003. It is important to recognize that Roche is
responsible for the manufacture, sales, marketing and distribution of Fuzeon. Roche is manufacturing bulk quantities of Fuzeon drug substance in its Boulder, Colorado facility and is producing finished drug product from bulk drug substance at
another Roche facility. The finished drug product is then shipped to a Roche facility for distribution. Roches sales force is responsible for selling Fuzeon. Under our collaboration agreement, we do not have the ability or rights to co-market
this drug or field our own Fuzeon sales force. All third party contracts for manufacturing, distribution, sale, and reimbursement are between Roche and the third party. We are not a party to any of the material contracts in these areas. Roche
provides us with information on manufacturing, sales and distribution of Fuzeon. Roche is responsible for estimating reductions to gross sales for expected returns of expired products, government rebate programs, such as Medicaid reimbursements, and
customer incentives, such as cash discounts for prompt payment. We review these items for accuracy and reasonableness. We receive 50% of the product gross profits for the United States and Canada.



We receive royalties on sales of Fuzeon in countries outside of the United
States and Canada. Roche is responsible for all activities related to Fuzeon outside of the United States and Canada, including regulatory, manufacturing, sales and distribution. We receive a quarterly royalty report from Roche that summarizes these
sales and the royalty amounts due to Trimeris.



Currently, our
only significant source of revenue is from the sale of Fuzeon. Gross profit and royalty revenue from the sale of Fuzeon exceeded the selling, marketing and other charges during the quarter ended June 30, 2005 resulting in positive cash flow from the
collaboration agreement. Selling, marketing and other charges in the United States and Canada exceeded the gross profit and royalty revenue from the sale of Fuzeon during the quarter ended June 30, 2004 resulting in negative cash flow.



We are in the process of finalizing an amendment to our collaboration
agreement with Roche. This amendment will clarify certain responsibilities of the parties under the collaboration agreement related to manufacturing. To date, we have reached an agreement in principle regarding certain key terms of this amendment.
With respect to the understanding we have with Roche pertaining to amounts owed for capital contributions and manufacturing milestones, we have recorded these amounts as of June 30, 2005 on the basis that we will execute an agreement in the near
future with terms substantially the same as those we have agreed to in principle.



The Company and Roche agreed to limit the Companys actual cash contribution to the Fuzeon selling and marketing expenses in 2004 to approximately $10 million, even though Roche has spent significantly more on
these expenses. If certain cumulative levels of sales for Fuzeon in the United States and Canada are achieved, our share of any additional expenses incurred by Roche during 2004 will be payable to Roche beginning at a future date over several years
from that future date. We currently estimate this date to be in 2011. During the year ended December 31, 2004, the Companys share of selling and marketing expenses exceeded $10 million. As a result the Company included an additional charge
under collaboration loss to reflect the payment of this excess according to the terms of our agreement with Roche. During 2004 the Company recorded $15.6 million as part of collaboration loss, which represented the net present value of the
Companys estimated share of the expenses that were in excess of (approximately) $10 million. This amount was arrived at taking into account the expected timing and terms of payment under the agreement. For 2005, Trimeris will contribute to
selling and marketing expenses in accordance with the terms of an agreement we reached with Roche in May of 2005.



Historical Information Necessary to Understand our Business



We began our operations in January 1993 and, prior to April 1, 2003, we were a development stage company. Accordingly, we have a limited operating
history. Since our inception, substantially all of our resources have been dedicated to:



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



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



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



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



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



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



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##### Table of Contents

We have lost money since inception and, as of June 30, 2005, had an accumulated deficit of approximately
$378.9 million. We may never generate significant revenue from product sales or royalties.



Development of current and future drug candidates will require additional, time-consuming and costly research and development, preclinical testing and extensive clinical trials prior to submission of any regulatory
application for commercial use. We expect to incur losses for the foreseeable future and these losses may increase if our research and development, preclinical testing, drug production and clinical trial efforts expand. The amount and timing of our
operating expenses will depend on many factors, including:



| |  |  | the sales levels and market acceptance achieved by Fuzeon,
| | - |  | ----------------------------------------------------------



| |  |  | the production levels for Fuzeon, which affect the economies of scale in the production process and our cost of goods sold,
| | - |  | ---------------------------------------------------------------------------------------------------------------------------



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



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



| |  |  | the timing of regulatory actions,
| | - |  | ---------------------------------



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



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



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



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



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



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



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



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



Research and Development



The following discussion highlights certain aspects of our on-going and
planned research and development programs and commercialization efforts. The results of our previous clinical trials are not necessarily indicative of the results of future clinical trials.



Fuzeon®, enfuvirtide (formerly known as T-20)



Anti-HIV drugs are referred to as antiretroviral agents. Fuzeon is our first-generation HIV fusion inhibitor, a new class of
anti-HIV drugs. The FDA has approved the use of Fuzeon in combination with other anti-HIV drugs for the treatment of HIV-1 infection in treatment-experienced patients with evidence of HIV-1 replication despite ongoing antiretroviral therapy. FUZEON
works differently than other approved antiretroviral agents, by blocking the HIV virus from entering the human immune system cells (CD4+s) and thus preventing viral replication, reducing quantities of circulating virus measured in the blood
(viral load) and preserving or improving immune system functions. Prior to the availability of FUZEON, the only approach available to treat HIV infection was to lower viral loads by using a combination of drugs that inhibit one of two of



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##### Table of Contents

the viral enzymes that are necessary for the virus to replicate once inside the CD+4 cell: reverse transcriptase and protease. There are three classes of
drugs that inhibit these two enzymes: nucleoside reverse transcriptase inhibitors, or NRTIs, non-nucleoside reverse transcriptase inhibitors, or NNRTIs, and protease inhibitors, or PIs. We refer to NRTIs and NNRTIs collectively as RTIs. There are
fifteen FDA-approved RTIs and ten FDA-approved PIs.



In March
2003, the FDA granted accelerated approval for the commercial sale of Fuzeon, and commercial sales of Fuzeon began in March 2003. Roche received accelerated FDA approval of Fuzeon based on 24-week clinical data from two Phase III pivotal trials for
Fuzeon. In October 2004, the FDA granted full approval based on results from Phase III clinical trials over 48 weeks.



Roche filed an application for European marketing approval in September 2002. Roche received marketing approval under exceptional circumstances from the
European Medicines Evaluation Agency, or EMEA, for use of Fuzeon in the European Union in May 2003. Roche submitted a full analysis of 48-week clinical data to the Committee for Human Medicinal Products, or CHMP, in December 2003 seeking a label
change for Fuzeon. In April 2004, the CHMP recommended inclusion of the 48-week data in the label. This was followed by approval by the EMEA for this label change in June 2004. Outside the United States and the European Union, Roche has received
approval and reimbursement for Fuzeon in over thirty-five countries, and is in the process of negotiating reimbursement from additional countries in which they plan to market Fuzeon.



Manufacturing



Roche manufactures the bulk drug substance of Fuzeon. Based on our progress and experience to date, we believe that Roche will be able to produce a supply
of Fuzeon sufficient to meet anticipated demand. If Fuzeon sales levels do not meet Roche and our expectations, the resulting production volumes may not allow Roche to achieve their anticipated economies of scale for Fuzeon.If Roche does not
achieve these economies of scale, the costs of goods for Fuzeon could be higher than our current expectations.



Distribution



On April
26, 2004, Fuzeon became available through retail and specialty pharmacies across the U.S. This development enhanced and simplified access to Fuzeon for patients and their healthcare providers. Physicians can write prescriptions for Fuzeon in the
same manner as for any other prescription medication and patients can get Fuzeon from the pharmacy of their choice, including Bioscrip. Prior to April 26, 2004, Fuzeon was only available in the U.S. through Bioscrip.



Alternative injection systems



It is generally recognized that the chief impediment to the broader adoption
of Fuzeon in clinical practice is related to the route of administration and the incidence of injection site reactions. We have undertaken to ameliorate these issues by developing alternative administration options for Fuzeon. One such effort
involves the Biojector 2000, or B2000, injection system, manufactured by Bioject Medical Technologies Inc. The B2000 system is a needle-free CO2-powered injector that disperses liquid medication through the skin. In May 2005, the Company and Roche
filed a supplemental new drug application, or sNDA, with the U.S. Food and Drug Administration for inclusion of B2000 information about the needle-free injection device in the FUZEON labeling. In July 2005, the FDA notified Roche and Trimeris that
it had accepted the filing of their sNDA to consider the label change. The filing is based on data from the T20-405 study, a single-dose, comparative pharmacokinetic study of FUZEON administered via the needle-free device compared to standard
needle-syringe administration. Results from this study were presented at the HIV DART meeting in December 2004. Roche and Trimeris anticipate that the FDA will provide feedback and a decision on the sNDA later this year.



Trimeris and Roche plan to begin enrollment of a new trial  the FUZEON
WAND (FUZEON With A Needle-free Device) study, assessing patient acceptance and experience in administration of FUZEON via the B2000 needle-free device compared to standard needle and syringe administration. Anticipated to start in August 2005, this
study will enroll 40 patients, in a month-long, cross-over design evaluation. Endpoints include tolerability, injection site reactions and pharmacokinetics.



Next Generation Peptides and T-1249



We, together with our partner Roche, are currently researching several promising HIV gp41 peptide inhibitors, with the hope of selecting one of these
peptides for advanced pre-clinical studies. We have identified a lead candidate and back-up candidate that will proceed to advanced formulation studies and preliminary toxicology studies. The results of these studies will determine how rapidly we
move towards naming a clinical candidate.



15



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##### Table of Contents

T-1249 is a second-generation HIV fusion inhibitor that has been investigated successfully in four
separate clinical trials. Phase I/II trials of T-1249 demonstrated satisfactory efficacy and safety, including in patients who had previously failed on and had developed resistance to Fuzeon. In January 2004, Roche and Trimeris announced that
further clinical development of T-1249 was being put on hold due to technical challenges in achieving a formulation capable of delivering a once daily injection. The compounds safety, efficacy and tolerability were not factors affecting the
decision. The clinical trial, T1249-105, was on-going when the decision was made to put the development of T-1249 on hold. T1249-105 is now a compassionate use protocol for patients that were already receiving T-1249, as these patients have
exhausted all treatment options. To date, 29 patients have completed 96 weeks of treatment with T-1249.



Other Research Programs



In June 2004, we announced the renewal of an agreement with Array Biopharma Inc., or Array, to discover small molecule entry inhibitors directed against HIV. The terms of the agreement are substantially similar to those of the initial
agreement, signed in August 2001. Over the course of the agreement, Array has received research funding and the right to receive milestone payments and royalties based on the success of this program. In connection with the agreement, as amended,
Trimeris has screened a library of small molecule compounds created by Array against HIV entry inhibitor targets. We have completed screening of these compounds for activity in our assays and are in the process of evaluating the most promising
compounds for possible further development as a clinical candidate. In the event that no candidates are identified as a result of our analysis, the collaboration agreement will terminate on December 31, 2005 unless terminated earlier according to
its terms.



In 2002, we entered into an agreement with Neokimia
Inc., or Neokimia, to discover and develop small molecule HIV fusion inhibitors. We have initially screened a library of small molecule compounds provided by Neokimia and Neokimia will use its proprietary drug discovery platform to optimize any lead
compounds with the goal of identifying one or more preclinical drug candidates. Neokimia has provided the initial library of compounds on a nonexclusive basis but will work exclusively with us on the HIV gp41 fusion protein target during the term of
the collaboration. In 2003, we exercised our option to select an additional target related to HIV fusion to add to the collaboration. The research performed under the collaboration has been performed in pursuant to a research plan that has been
mutually agreed upon by the parties. The term of this research plan has concluded. The Company and Neokimia are in discussions concerning possible additional research in furtherance of the work already performed under the research plan. In December
2003, Neokimia merged with Tranzyme, Inc., or Tranzyme, and Tranzyme acquired Neokimias rights and obligations under the 2002 agreement.



In June 2005, we entered into a drug discovery and development agreement with ChemBridge Research Laboratories, Inc., or CRL. Under the terms of the
agreement, Trimeris and CRL will work together to discover and develop small molecule inhibitors of HIV. Specifically, pursuant to the agreement, we will work with CRL to identify small molecule inhibitor compounds against two HIV entry targets,
gp41 and gp120. Trimeris and CRL will collaborate to identify orally active lead compounds and then optimize preclinical candidates. Trimeris will be responsible for preclinical and clinical development, manufacturing, regulatory and commercial
activities on a worldwide basis for all compounds and products resulting from the collaboration. Trimeris will provide funding to CRL to support medicinal chemistry efforts, and CRL will work exclusively with us on these programs. CRL will be
eligible to receive milestone payments based on the achievement of specific development and commercial events, and may also be eligible to receive royalties on net product sales.



16



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##### Table of Contents

RESULTS OF OPERATIONS



Comparison Of Three Months Ended June 30, 2005 and 2004



Revenues



The table below presents our revenue sources for the three months ended June 30, 2005 compared to the three months ended June 30, 2004.



|                                              |  |                            |       |      |                    |        |   |  |   |        |  
|--------------------------------------------- |  | -------------------------- | ----- | ---- | ------------------ | ------ | - |  | - | ------ | -
|(in thousands)                                |  | Three Months EndedJune 30, |       |      | Increase(Decrease) |       
|                                              |  | 2005                       |       | 2004 |                    |       
|Milestone revenue                             |  | $                          | 430   |      | $                  | 534    |   |  | $ | (104   | )
|Royalty revenue                               |  |                            | 2,642 |      |                    | 1,109  |   |  |   | 1,533  |  
|Collaboration income (loss)                   |  |                            | 1,313 |      |                    | (9,850 | ) |  |   | 11,163 |  
|                                              |  |                            |       |      |                    |        |   |  |   |        |  
|Total revenue and collaboration income (loss) |  | $                          | 4,385 |      | $                  | (8,207 | ) |  | $ | 12,592 |  
|                                              |  |                            |       |      |                    |        |   |  |   |        |  



Milestone revenue: Total
milestone revenue represents the amortization of achieved milestones under our collaboration with Roche.



The table below presents our achieved milestones from Roche as of June 30, 2005. We are recognizing these milestones on a straight-line basis over
the estimated development period, or estimated commercial period, as appropriate.



|               |  |                |        |    |               |         |                                             |      |                                                |   |                          |  |   |     |  |              
|-------------- |  | -------------- | ------ | -- | ------------- | ------- | ------------------------------------------- | ---- | ---------------------------------------------- | - | ------------------------ |  | - | --- |  | -------------
|(in thousands) |  | MilestoneTotal |        |    | Date Achieved |         | Total RevenueRecognizedThrough June 30,2005 |      | Revenue for theThree Months EndedJune 30, 2005 |   | End of RecognitionPeriod
|               |  | $              | 4,600  | *  |               | July    |                                             | 1999 |                                                | $ | 3,487                    |  | $ | 37  |  | December 2012
|               |  |                | 2,000  |    |               | October |                                             | 2000 |                                                |   | 1,373                    |  |   | 21  |  | December 2012
|               |  |                | 8,000  |    |               | March   |                                             | 2003 |                                                |   | 2,758                    |  |   | 175 |  | December 2012
|               |  |                | 5,000  |    |               | May     |                                             | 2003 |                                                |   | 1,566                    |  |   | 114 |  | December 2012
|               |  |                | 2,500  |    |               | June    |                                             | 2003 |                                                |   | 513                      |  |   | 62  |  | June 2013    
|               |  |                | 750    | ** |               | June    |                                             | 2004 |                                                |   | 93                       |  |   | 21  |  | June 2013    
|               |  |                |        |    |               |         |                                             |      |                                                |   |                          |  |   |     |  |              
|Total          |  | $              | 22,850 |    |               |         |                                             |      |                                                | $ | 9,790                    |  | $ | 430 |  |              
|               |  |                |        |    |               |         |                                             |      |                                                |   |                          |  |   |     |  |              

---

|* | Roche made a nonrefundable initial cash payment to the Company of $10 million during 1999. In July 1999, the Company granted Roche a warrant to purchase 362,000 shares of common
stock at a purchase price of $20.72 per share. The fair value of the warrant of $5.4 million was credited to additional paid-in capital in 1999, and as a reduction of the $10 million up-front payment received from Roche. We have deferred $4.6
million, the net of the $10 million up-front payment and the $5.4 million for the warrant, over the research and development period.
|- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|** | We are in the process of finalizing an amendment to our collaboration agreement with Roche. In its present form, the proposed amendment resolves issues related to the performance of
certain milestones. In June 2004, the parties agreed that certain performance had been met and that payment of this milestone was appropriate. We have recorded the June 2004 milestone on the basis that we will reach a final agreement with terms
substantially the same as those we have agreed to in principle.
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



In January 2005, based on our current evaluation of our research and development programs, we placed further clinical development of T-1249 on hold indefinitely due to challenges in achieving an extended release
formulation that would allow significantly less dosing frequency. Our recent research and development efforts have focused on the identification of a lead candidate and a back-up candidate that will proceed to advanced formulation studies and
preliminary toxicology studies. Taking into account the additional research that will be required to achieve these new formulation goals, in 2005 we changed our estimate of the end of the research and development period from December 2010 to
December 2012; as a result we will recognize approximately $500,000 less revenue in 2005 compared to 2004.



Royalty revenue: Royalty revenue represents the royalty payment earned from Roche based on total net sales of Fuzeon outside the United States and
Canada. Sales of Fuzeon outside the United States and Canada began in June 2003. To calculate the royalty revenue, an 8% distribution charge is deducted from net sales, as reported by Roche, from which Trimeris receives a 10% royalty.



17



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##### Table of Contents

Collaboration Income (Loss):The table below presents our collaboration income (loss) (United
States and Canada) for the three months ended June 30, 2005 compared to the three months ended June 30, 2004. Collaboration income (loss) is reported on our Statement of Operations as a component of revenue. Under our collaboration agreement with
Roche, we share gross profits equally from the sale of Fuzeon in the United States and Canada. Fuzeon was launched in March 2003.



|                                     |  |                            |         |   |          |   |         |            |  |   |        |  
|------------------------------------ |  | -------------------------- | ------- | - | -------- | - | ------- | ---------- |  | - | ------ | -
|(in thousands)                       |  | Three Months EndedJune 30, |         |   | Increase |  
|                                     |  | 2005                       |         |   | 2004     |   |         | (Decrease) | 
|Gross Fuzeon sales by Roche          |  | $                          | 30,701  |   |          | $ | 26,973  |            |  | $ | 3,728  |  
|Less sales adjustments               |  |                            | (5,488  | ) |          |   | (2,576  | )          |  |   | (2,912 | )
|                                     |  |                            |         |   |          |   |         |            |  |   |        |  
|Net sales                            |  |                            | 25,213  |   |          |   | 24,397  |            |  |   | 816    |  
|Cost of goods sold                   |  |                            | (11,906 | ) |          |   | (23,028 | )          |  |   | 11,122 |  
|                                     |  |                            |         |   |          |   |         |            |  |   |        |  
|Gross profit                         |  |                            | 13,307  |   |          |   | 1,369   |            |  |   | 11,938 |  
|Selling and marketing expenses       |  |                            | (10,003 | ) |          |   | (8,572  | )          |  |   | (1,431 | )
|Other costs                          |  |                            | (1,084  | ) |          |   | (4,785  | )          |  |   | 3,701  |  
|                                     |  |                            |         |   |          |   |         |            |  |   |        |  
|Total shared profit & loss           |  |                            | 2,220   |   |          |   | (11,988 | )          |  |   | 14,208 |  
|                                     |  |                            |        
|Trimeris share *                     |  |                            | 1,534   |   |          |   | (5,994  | )          |  |   | 7,528  |  
|Costs exclusive to Trimeris Inc.     |  |                            | (221    | ) |          |   | (3,856  | )          |  |   | 3,635  |  
|                                     |  |                            |         |   |          |   |         |            |  |   |        |  
|Net income (loss) from collaboration |  | $                          | 1,313   |   |          | $ | (9,850  | )          |  | $ | 11,163 |  
|                                     |  |                            |         |   |          |   |         |            |  |   |        |  

---

|* | For the three months ended June 30, 2005, Trimeris and Roche did not share Total shared profits & loss equally. Trimeris has recorded its share of selling and
marketing expenses for this period in accordance with terms and conditions of an agreement that we reached with Roche in May of 2005. For the three months ended June 30, 2004, Trimeris and Roche shared Total shared profits & loss
equally.
|- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Gross Fuzeon sales by Roche:
Gross Fuzeon sales are recorded by Roche. Prior to April 26, 2004, Roche had an exclusive distribution arrangement with Bioscrip to distribute Fuzeon in the United States during the initial commercial launch in 2003, which terminated on April 26,
2004. Effective April 26, 2004, Fuzeon became available through retail and specialty pharmacies across the U.S. Prior to April 26, 2004, revenue from product sales was recognized when title and risk of loss had passed to Bioscrip, which was when
Bioscrip allocated drug for shipment to a patient. Beginning April 26, 2004, revenue is recognized when Roche ships drug and title and risk of loss passes to wholesalers.



The table below presents the number of kits shipped to wholesalers in the U.S. and Canada during 2005 and 2004.



|             |  |        |  |        |   
|------------ |  | ------ |  | ------ | --
|Kits Shipped |  | 2005   |  | 2004   |   
|Q1           |  | 15,000 |  | 11,000 |   
|Q2           |  | 16,900 |  | 16,200 | * 
|Q3           |  |       |  | 14,600 |   
|Q4           |  |       |  | 17,200 | **
|             |  |        |  |        |   
|Total        |  | 31,900 |  | 59,000 |   
|             |  |        |  |        |   

---

|* | Includes an estimated 3,000 kits as a result of inventory build up at wholesalers.
|- | ----------------------------------------------------------------------------------

|** | Includes an estimated 1,000 kits as a result of inventory build up at wholesalers.
|-- | ----------------------------------------------------------------------------------



Sales adjustments: Sales adjustments are recorded by Roche based on their experience with selling Fuzeon and other
HIV drugs. Sales adjustments increased for the three months ended June 30, 2005 as compared to the three months ended June 30, 2004 primarily due to changes in sales volumes, rebates, discounts and returns. There were no material revisions to
Roches methodology for recording sales adjustments between the periods.



18



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##### Table of Contents

Cost of goods sold:Cost of goods sold decreased for the three months ended June 30, 2005 as
compared to the three months ended June 30, 2004 primarily due to a decrease in production variances. Roche began billing Trimeris for production variances in the second quarter of 2004.



Cost of goods sold for the three months ended June 30, 2004 also includes approximately $6.6 million relating to unabsorbed
costs that were the result of unexpectedly low initial manufacturing volumes when Fuzeon was launched and various costs associated with the development of the Fuzeon manufacturing process. Also included in the three months ended June 30, 2004 is
approximately $4.3 million in production variances from the first quarter of 2004.



These costs were disclosed to us during the second quarter of 2004 by Roche. Previously, we inquired about manufacturing variances and were provided amounts by Roche which we previously recorded. After a series of
discussions and negotiations during the second quarter with Roche and notwithstanding our contractual agreement, we agreed in principle on these amounts subject to some additional due diligence. We recorded both the $6.6 million and the $4.3 million
during the second quarter of 2004. We are currently in the process of formalizing an amendment to our collaboration agreement with respect to the variance calculation.



Gross profit: Gross profit as a percentage of net sales for the three months ended June 30, 2005 was 53% compared to
6% for the three months ended June 30, 2004. The increase in gross profit is primarily a result of unabsorbed manufacturing costs described in the immediately preceding two paragraphs.



Selling and marketing expenses: We have negotiated an agreement with Roche related to our contribution to selling and
marketing expenses for 2005. Under a separate agreement with Roche for 2004, our selling and marketing expenses were limited to approximately $10 million which we reached in the second quarter of 2004.



Other costs: Other costs for the three months ended June 30, 2005 and
June 30, 2004 includes general and administrative costs and distribution charges for which Trimeris is 50% responsible under the collaboration agreement. The three months ended June 30, 2004 also includes inventory write-offs.



Costs exclusive to Trimeris:For the three months ended
June 30, 2005 and 2004, costs exclusive to Trimeris includes license fees, based on net sales of Fuzeon, for certain technology paid to a third party. Also included in the three months ended June 30, 2004 is the net present value of the
Companys estimated share of certain marketing expenses in excess of approximately $10 million based on expected timing and terms of payment under the agreement. The marketing limit for 2004 is discussed above.



Research And Development Expenses



The table below presents our research and development expenses for the three
months ended June 30, 2005 compared to the three months ended June 30, 2004.



|                                       |  |                            |       |      |                    |       |   |  |   |      |  
|-------------------------------------- |  | -------------------------- | ----- | ---- | ------------------ | ----- | - |  | - | ---- | -
|(in thousands)                         |  | Three Months EndedJune 30, |       |      | Increase(Decrease) |      
|                                       |  | 2005                       |       | 2004 |                    |      
|Non-cash compensation                  |  | $                          | 99    |      | $                  | (2    | ) |  | $ | 101  |  
|Other research and development expense |  |                            | 5,050 |      |                    | 5,382 |   |  |   | (332 | )
|                                       |  |                            |       |      |                    |       |   |  |   |      |  
|Total research and development expense |  | $                          | 5,149 |      | $                  | 5,380 |   |  | $ | (231 | )
|                                       |  |                            |       |      |                    |       |   |  |   |      |  



Total research and
development expenses include gross research and development expenses less Roches share of such costs for Fuzeon and T-1249. Under our collaboration agreement, Roche and we shared equally the development costs incurred during the period from
July 1, 1999 to June 30, 2005 for Fuzeon and T-1249. Research, or the discovery of compounds is generally distinct from the advanced testing of these compounds, a process referred to herein as development. Development expenses typically include
certain clinical and pre-clinical studies performed on a clinical candidate compound, as well as post-marketing commitments related to approved drugs. In our collaboration with Roche, the discovery of compounds that may become clinical candidates is
governed by a separate research agreement and the work by the parties is performed according to an agreed upon research plan. The research agreement itself does not require that a specific amount be spent on any annual research plan. Either party
has the option to supplement the budgeted research plan at their own expense. At present the Company is still in discussions with Roche to finalize the specific activities to be carried out under the research plan and the associated budget for 2005,
together with the relative obligations of the parties with respect to expenses incurred in 2005 under the research plan.



19



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##### Table of Contents

Non-cash compensation: Non-cash compensation expense for the three months ended June 30, 2005 is
primarily comprised of amortization expense for restricted stock issued to employees in June 2004 in the amount of $105,000 offset, in part, by the expense reversal calculated under EITF 96-18 Accounting for Equity Instruments That Are Issued
to Other Than Employees for Acquiring, or in Conjunction with Selling, Goods or Services in the amount of $6,000. The restricted stock grant vests 100% after the third year of service and is being amortized on a straight-line basis over the
three-year period. Non-cash compensation expense reversal for the three months ended June 30, 2004 is comprised of expense calculated under EITF 96-18, Accounting for Equity Instruments That Are Issued to Other Than Employees for Acquiring, or
in Conjunction with Selling, Goods or Services for stock options previously granted to non-employees at the end of the period as compared to this amount at the beginning of the period. The primary factor affecting this calculation is the
change in the market price of our stock. The closing market price per share of our stock was $9.98, $11.26, $14.43, and $14.75, on June 30, 2005, March 31, 2005, June 30, 2004, and March 31, 2004. The expense reversal resulted because the cumulative
expenses calculated under EITF 96-18 for stock options previously granted to non-employees was less at June 30, 2005, compared to March 31, 2005 and less at June 30, 2004 compared to March 31, 2004. This decrease in the expense resulted primarily
due to the decrease in the market price of our stock from March 31, 2005 to June 30, 2005 and from March 31, 2004 to June 30, 2004. EITF 96-18 requires that compensation costs related to stock options granted to non-employees be measured at the end
of each reporting period to account for changes in the fair value of our common stock until the options are vested.



Other research and development expense: Total other research and development expense decreased during the three months ended June 30, 2005 compared
to the three months ended June 30, 2004, primarily as a result of decreased costs related to our clinical trials and post marketing commitments to the FDA for Fuzeon offset, in part, by decreases in our research and development funding from Roche.



We believe research and development expenses, net of the
reimbursements for Fuzeon and T-1249 development costs from Roche, will be approximately equal to or less than that of 2004 as a result of the continued reduction in post marketing commitment expenses for Fuzeon.



General and Administrative Expenses



The table below presents our general and administrative expenses for the
three months ended June 30, 2005 compared to the three months ended June 30, 2004.



|                                         |  |                            |       |                    |   |       |  |   |      |  
|---------------------------------------- |  | -------------------------- | ----- | ------------------ | - | ----- |  | - | ---- | -
|(in thousands)                           |  | Three Months EndedJune 30, |       | Increase(Decrease) |  
|                                         |  | 2005                       |       | 2004               |  
|Non-cash compensation                    |  | $                          | 112   |                    | $ | 12    |  | $ | 100  |  
|Other general and administrative expense |  |                            | 2,317 |                    |   | 2,818 |  |   | (501 | )
|                                         |  |                            |       |                    |   |       |  |   |      |  
|Total general and administrative expense |  | $                          | 2,429 |                    | $ | 2,830 |  | $ | (401 | )
|                                         |  |                            |       |                    |   |       |  |   |      |  



Non-cash
compensation: Non-cash compensation expense for the three months ended June 30, 2005 and June 30, 2004 is comprised of amortization expense for restricted stock issued to employees in June 2004 and to our Chief Executive Officer in September of
2004.



Other general and administrative expense:Other
general and administrative expense decreased for the three months ended June 30, 2005 compared to the three months ended June 30, 2004, as a result of decreased premiums for directors and officers insurance, and in the three months ended June
30, 2004 we accrued severance costs for an executive who ceased employment in June 2004, offset in part by increases in our facilities costs.



Barring unforeseen circumstances, we expect general and administrative expenses to be equal to or less than that of 2004.



20



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##### Table of Contents

Other Income (Expense):The table below presents our other income (expense) for the three months
ending June 30, 2005 and 2004.



|                          |  |                             |      |   |                    |   |     |   |  |      |  
|------------------------- |  | --------------------------- | ---- | - | ------------------ | - | --- | - |  | ---- | -
|(in thousands)            |  | Three Months Ended June 30, |      |   | Increase(Decrease) |  
|                          |  | 2005                        |      |   | 2004               |   |    
|Interest income           |  | $                           | 318  |   |                    | $ | 199 |   |  | 119  |  
|Gain on sale of equipment |  |                             | 6    |   |                    |   |    |   |  | 6    |  
|Interest expense          |  |                             | (185 | ) |                    |   | (2  | ) |  | (183 | )
|                          |  |                             |      |   |                    |   |     |   |  |      |  
|Total other income, net   |  | $                           | 139  |   |                    | $ | 197 |   |  | (58  | )
|                          |  |                             |      |   |                    |   |     |   |  |      |  



Other income (expense)
consists of interest income, interest expense, accretion of interest and gain on sale of equipment. The decrease in other income for the three months ended June 30, 2005 was primarily due to the increase in interest expenses. Interest expense
increased for the three months ended June 30, 2005 as compared to the three months ended June 30, 2004 as a result of accreting the excess marketing expenses recorded on the balance sheet as Accrued marketing costs. Our actual cash
contribution to certain selling and marketing expenses for Fuzeon in 2004 was limited to approximately $10 million, even though Roche spent significantly more on these expenses. If certain cumulative levels of sales for Fuzeon in the United States
and Canada are achieved, our share of any additional expenses incurred by Roche during 2004 will be payable to Roche beginning at a future date over several years from that future date. During the second quarter of 2004, we reached our $10 million
limitation for the year. We recorded approximately $15.6 million as part of collaboration loss during the year ended December 31, 2004. This represented the net present value of our estimated share of the additional expenses, discounted at a
risk-free interest rate from the expected payment date based on achievement of the sales milestones in the agreement. Interest expense for the three months ended June 30, 2004 is related to interest payments on capital leases during that period. All
capital leases were paid off during 2004. The increase in interest expense was offset, in part, by an increase in interest income for the three months ended June 30, 2005 as compared to the three months ended June 30, 2004 as a result of increased
interest rates.



RESULTS OF OPERATIONS



Comparison Of Six Months Ended June 30, 2005 and 2004



Revenues



The table below presents our revenue sources for the six months ended June
30, 2005 compared to the six months ended June 30, 2004.



|                                              |  |                          |       |      |                     |         |   |  |   |        |  
|--------------------------------------------- |  | ------------------------ | ----- | ---- | ------------------- | ------- | - |  | - | ------ | -
|(in thousands)                                |  | Six Months EndedJune 30, |       |      | Increase (Decrease) |        
|                                              |  | 2005                     |       | 2004 |                     |        
|Milestone revenue                             |  | $                        | 861   |      | $                   | 1,060   |   |  | $ | (199   | )
|Royalty revenue                               |  |                          | 4,403 |      |                     | 1,910   |   |  |   | 2,493  |  
|Collaboration loss                            |  |                          | 1,277 |      |                     | (12,396 | ) |  |   | 13,673 |  
|                                              |  |                          |       |      |                     |         |   |  |   |        |  
|Total revenue and collaboration income (loss) |  | $                        | 6,541 |      | $                   | (9,426  | ) |  | $ | 15,967 |  
|                                              |  |                          |       |      |                     |         |   |  |   |        |  



Milestone
revenue: Total milestone revenue represents the amortization of achieved milestones under our collaboration with Roche.



21



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##### Table of Contents

The table below presents our achieved milestones from Roche as of June 30, 2005. We are
recognizing these milestones on a straight-line basis over the estimated development period, or estimated commercial period, as appropriate.



|               |  |                |        |    |               |         |                                             |      |                                              |   |                          |  |   |     |  |              
|-------------- |  | -------------- | ------ | -- | ------------- | ------- | ------------------------------------------- | ---- | -------------------------------------------- | - | ------------------------ |  | - | --- |  | -------------
|(in thousands) |  | MilestoneTotal |        |    | Date Achieved |         | Total RevenueRecognizedThrough June 30,2005 |      | Revenue for the SixMonths EndedJune 30, 2005 |   | End of RecognitionPeriod
|               |  | $              | 4,600  | *  |               | July    |                                             | 1999 |                                              | $ | 3,487                    |  | $ | 74  |  | December 2012
|               |  |                | 2,000  |    |               | October |                                             | 2000 |                                              |   | 1,373                    |  |   | 42  |  | December 2012
|               |  |                | 8,000  |    |               | March   |                                             | 2003 |                                              |   | 2,758                    |  |   | 350 |  | December 2012
|               |  |                | 5,000  |    |               | May     |                                             | 2003 |                                              |   | 1,566                    |  |   | 228 |  | December 2012
|               |  |                | 2,500  |    |               | June    |                                             | 2003 |                                              |   | 513                      |  |   | 125 |  | June 2013    
|               |  |                | 750    | ** |               | June    |                                             | 2004 |                                              |   | 93                       |  |   | 42  |  | June 2013    
|               |  |                |        |    |               |         |                                             |      |                                              |   |                          |  |   |     |  |              
|Total          |  | $              | 22,850 |    |               |         |                                             |      |                                              | $ | 9,790                    |  | $ | 861 |  |              
|               |  |                |        |    |               |         |                                             |      |                                              |   |                          |  |   |     |  |              

---

|* | Roche made a nonrefundable initial cash payment to the Company of $10 million during 1999. In July 1999, the Company granted Roche a warrant to purchase 362,000 shares of common
stock at a purchase price of $20.72 per share. The fair value of the warrant of $5.4 million was credited to additional paid-in capital in 1999, and as a reduction of the $10 million up-front payment received from Roche. We have deferred $4.6
million, the net of the $10 million up-front payment and the $5.4 million for the warrant, over the research and development period.
|- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|** | We are in the process of finalizing an amendment to our collaboration agreement with Roche. In its present form, the proposed amendment resolves issues related to the performance of
certain milestones. As of June 2004, the parties had agreed that certain performance had been met and that payment of this milestone was appropriate. We have recorded this amount as of June 30, 2005 on the basis that we will reach a final agreement
with terms substantially the same as those we have agreed to in principle.
|-- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



In January 2005, based on our current evaluation of our research and development programs, we placed further clinical development of T-1249 on hold indefinitely due to challenges in achieving an extended release
formulation that would allow significantly less dosing frequency. Our recent research and development efforts have focused on the identification of a lead candidate and a back-up candidate that will proceed to advanced formulation studies and
preliminary toxicology studies. Taking into account the additional research that will be required to achieve these new formulation goals, in 2005 we changed our estimate of the end of the research and development period from December 2010 to
December 2012; as a result we will recognize approximately $500,000 less revenue in 2005 compared to 2004.



Royalty revenue: Royalty revenue represents the royalty payment earned from Roche based on total net sales of Fuzeon outside the United States and
Canada. Sales of Fuzeon outside the United States and Canada began in June 2003. To calculate the royalty revenue, an 8% distribution charge is deducted from net sales, as reported by Roche, from which Trimeris receives a 10% royalty.



Collaboration Income (Loss):The table below presents our
collaboration income (loss) (United States and Canada) for the six months ended June 30, 2005 compared to the six months ended June 30, 2004. Collaboration income (loss) is reported on our Statement of Operations as a component of revenue. Under our
collaboration agreement with Roche, we share gross profits equally from the sale of Fuzeon in the United States and Canada. Fuzeon was launched in March 2003.



22



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##### Table of Contents

|                                     |  |                           |         |   |          |   |         |            |  |   |        |  
|------------------------------------ |  | ------------------------- | ------- | - | -------- | - | ------- | ---------- |  | - | ------ | -
|(in thousands)                       |  | Six Months Ended June 30, |         |   | Increase |  
|                                     |  | 2005                      |         |   | 2004     |   |         | (Decrease) | 
|Gross Fuzeon sales by Roche          |  | $                         | 57,755  |   |          | $ | 45,246  |            |  | $ | 12,509 |  
|Less sales adjustments               |  |                           | (9,230  | ) |          |   | (4,811  | )          |  |   | (4,419 | )
|                                     |  |                           |         |   |          |   |         |            |  |   |        |  
|Net sales                            |  |                           | 48,525  |   |          |   | 40,435  |            |  |   | 8,090  |  
|Cost of goods sold                   |  |                           | (22,296 | ) |          |   | (28,405 | )          |  |   | 6,109  |  
|                                     |  |                           |         |   |          |   |         |            |  |   |        |  
|Gross profit                         |  |                           | 26,229  |   |          |   | 12,030  |            |  |   | 14,199 |  
|Selling and marketing expenses       |  |                           | (21,543 | ) |          |   | (21,982 | )          |  |   | 439    |  
|Other costs                          |  |                           | (3,512  | ) |          |   | (6,887  | )          |  |   | 3,375  |  
|                                     |  |                           |         |   |          |   |         |            |  |   |        |  
|Total shared profit and loss         |  |                           | 1,174   |   |          |   | (16,839 | )          |  |   | 18,013 |  
|                                     |  |                           |        
|Trimeris share *                     |  |                           | 1,700   |   |          |   | (8,420  | )          |  |   | 10,120 |  
|Costs exclusive to Trimeris Inc.     |  |                           | (423    | ) |          |   | (3,976  | )          |  |   | 3,553  |  
|                                     |  |                           |         |   |          |   |         |            |  |   |        |  
|Net income (loss) from collaboration |  | $                         | 1,277   |   |          | $ | (12,396 | )          |  | $ | 13,673 |  
|                                     |  |                           |         |   |          |   |         |            |  |   |        |  

---

|* | For the six months ended June 30, 2005, Trimeris and Roche did not share Total shared profits & loss equally. Trimeris has recorded its share of selling and
marketing expenses for this period in accordance with terms and conditions of an agreement that we reached with Roche in May of 2005. For the six months ended June 30, 2004, Trimeris and Roche shared Total shared profits and loss
equally.
|- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Gross Fuzeon sales by Roche:
Gross Fuzeon sales are recorded by Roche. Prior to April 26, 2004, Roche had an exclusive distribution arrangement with Bioscrip to distribute Fuzeon in the United States during the initial commercial launch in 2003, which terminated on April 26,
2004. Effective April 26, 2004, Fuzeon became available through retail and specialty pharmacies across the U.S. Prior to April 26, 2004, revenue from product sales was recognized when title and risk of loss had passed to Bioscrip, which was when
Bioscrip allocated drug for shipment to a patient. Beginning April 26, 2004, revenue is recognized when Roche ships drug and title and risk of loss passes to wholesalers.



Sales adjustments: Sales adjustments are recorded by Roche based on their experience with selling Fuzeon and other
HIV drugs. Sales adjustments increased for the six months ended June 30, 2005 as compared to the six months ended June 30, 2004 primarily due to changes in sales volumes, rebates, discounts and returns. There were no material revisions to
Roches methodology for recording sales adjustments between the periods.



Cost of goods sold:Cost of goods sold decreased for the six months ended June 30, 2005 as compared to the six months ended June 30, 2004 primarily due to a decrease in production variances. Roche began billing
Trimeris for production variances in the second quarter of 2004.



Cost of goods sold for the six months ended June 30, 2004 includes approximately $6.6 million relating to unabsorbed costs that were the result of unexpectedly low initial manufacturing volumes when Fuzeon was launched and various costs
associated with the development of the Fuzeon manufacturing process.



These costs were disclosed to us during the second quarter of 2004 by Roche. Previously, we inquired about manufacturing variances and were provided amounts by Roche which we previously recorded. After a series of discussions and
negotiations during the second quarter of 2004 with Roche and notwithstanding our contractual agreement, we agreed in principle on an amount subject to some additional due diligence. We recorded $6.6 million during the second quarter of 2004. We are
currently in the process of formalizing an amendment to our collaboration agreement with respect to the variance calculation.



Gross profit: Gross profit as a percentage of net sales for the six months ended June 30, 2005 was 54% compared to 30% for the six months ended
June 30, 2004. The increase in gross profit primarily resulted from production variances charged in the first six months of 2004 as discussed above.



23



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##### Table of Contents

Selling and marketing expenses: We have negotiated an agreement with Roche related to our
contribution of selling and marketing expenses for 2005. For 2004, our selling and marketing expenses were governed by an agreement with Roche that was separate and distinct from the 2005 agreement. Under the 2004 agreement, our share of selling and
marketing expenses were limited to approximately $10 million, which we reached in the second quarter of 2004.



Other costs: Other costs for the six months ended June 30, 2005 and June 30, 2004 includes general and administrative costs, inventory write-offs,
distribution charges and charges for the Boulder manufacturing facility for which Trimeris is 50% responsible under the collaboration agreement.



Costs exclusive to Trimeris:For the six months ended June 30, 2005 and 2004, costs exclusive to Trimeris includes license fees, based on net sales
of Fuzeon, for certain technology paid to a third party. Also included in the six months ended June 30, 2004 is the net present value of the Companys estimated share of certain marketing expenses in excess of approximately $10 million based on
expected timing and terms of payment under the agreement. The marketing limit for 2004 is discussed above.



Research And Development Expenses



The table below presents our research and development expenses for the six months ended June 30, 2005 compared to the six months ended June 30, 2004.



|                                       |  |                          |        |      |                    |        |   |  |   |        |  
|-------------------------------------- |  | ------------------------ | ------ | ---- | ------------------ | ------ | - |  | - | ------ | -
|(in thousands)                         |  | Six Months EndedJune 30, |        |      | Increase(Decrease) |       
|                                       |  | 2005                     |        | 2004 |                    |       
|Non-cash compensation                  |  | $                        | 208    |      | $                  | (53    | ) |  | $ | 261    |  
|Other research and development expense |  |                          | 10,397 |      |                    | 11,682 |   |  |   | (1,285 | )
|                                       |  |                          |        |      |                    |        |   |  |   |        |  
|Total research and development expense |  | $                        | 10,605 |      | $                  | 11,629 |   |  | $ | (1,024 | )
|                                       |  |                          |        |      |                    |        |   |  |   |        |  



Total research and
development expenses include gross research and development expenses less Roches share of such costs for Fuzeon and T-1249. Under our collaboration agreement, Roche and we shared equally the development costs incurred during the period from
July 1, 1999 to June 30, 2005 for Fuzeon and T-1249. Research, or the discovery of compounds is generally distinct from the advanced testing of these compounds, a process referred to herein as development. Development expenses typically include
certain clinical and pre-clinical studies performed on a clinical candidate compound, as well as post-marketing commitments related to approved drugs. In our collaboration with Roche, the discovery of compounds that may become clinical candidates is
governed by a separate research agreement and the work by the parties is performed according to an agreed upon research plan. The research agreement itself does not require that a specific amount be spent on any annual research plan. Either party
has the option to supplement the budgeted research plan at their own expense. At present the Company is still in discussions with Roche to finalize the specific activities to be carried out under the research plan and the associated budget for 2005,
together with the relative obligations of the parties with respect to expenses incurred in 2005 under the research plan.



Non-cash compensation: Non-cash compensation expense for the six months ended June 30, 2005 is primarily comprised of amortization expense for
restricted stock issued to employees in June 2004 in the amount of $226,000 offset in part by the expense reversal calculated under EITF 96-18 Accounting for Equity Instruments That Are Issued to Other Than Employees for Acquiring, or in
Conjunction with Selling, Goods or Services in the amount of $18,000. Non-cash compensation expense reversal for the six months ended June 30, 2004 is comprised of expense calculated under EITF 96-18, Accounting for Equity Instruments
That Are Issued to Other Than Employees for Acquiring, or in Conjunction with Selling, Goods or Services for stock options previously granted to non-employees at the end of the period as compared to this amount at the beginning of the period.



Other research and development expense: Total other
research and development expense decreased during the six months ended June 30, 2005 compared to the six months ended June 30, 2004, primarily as a result of decreased costs related to our clinical trials and post marketing commitments to the FDA
for Fuzeon offset, in part, by decreases in our research and development funding from Roche.



24



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##### Table of Contents

General and Administrative Expenses



The table below presents our general and administrative expenses for the six
months ended June 30, 2005 compared to the six months ended June 30, 2004.



|                                         |  |                          |       |                     |   |       |  |   |      |  
|---------------------------------------- |  | ------------------------ | ----- | ------------------- | - | ----- |  | - | ---- | -
|(in thousands)                           |  | Six Months EndedJune 30, |       | Increase (Decrease) |  
|                                         |  | 2005                     |       | 2004                |  
|Non-cash compensation                    |  | $                        | 223   |                     | $ | 12    |  | $ | 211  |  
|Other general and administrative expense |  |                          | 4,517 |                     |   | 5,484 |  |   | (967 | )
|                                         |  |                          |       |                     |   |       |  |   |      |  
|Total general and administrative expense |  | $                        | 4,740 |                     | $ | 5,496 |  | $ | (756 | )
|                                         |  |                          |       |                     |   |       |  |   |      |  



Non-cash
compensation: Non-cash compensation expense for the six months ended June 30, 2005 and June 30, 2004 is comprised of amortization expense for restricted stock issued to employees in June 2004 and to our Chief Executive Office in September of
2004. This restricted stock grant vests 100% after the third year of service and is being amortized on a straight-line basis over the three-year period.



Other general and administrative expense:Other general and administrative expense decreased for the six months ended June 30, 2005 compared to the
six months ended June 30, 2004, as a result of decreased premiums for directors and officers insurance, and in the six months ended June 30, 2004, we accrued severance costs for an executive who ceased employment in June 2004 offset, in part,
by increased facilities costs.



Other Income (Expense):The table below presents our other income (expense) for the six months ending June 30, 2005 and 2004.



|                          |  |                           |      |   |                    |   |     |   |  |      |  
|------------------------- |  | ------------------------- | ---- | - | ------------------ | - | --- | - |  | ---- | -
|(in thousands)            |  | Six Months Ended June 30, |      |   | Increase(Decrease) |  
|                          |  | 2005                      |      |   | 2004               |   |    
|Interest income           |  | $                         | 590  |   |                    | $ | 460 |   |  | 130  |  
|Gain on sale of equipment |  |                           | 6    |   |                    |   |    |   |  | 6    |  
|Interest expense          |  |                           | (368 | ) |                    |   | (5  | ) |  | (363 | )
|                          |  |                           |      |   |                    |   |     |   |  |      |  
|Total other income, net   |  | $                         | 228  |   |                    | $ | 455 |   |  | (227 | )
|                          |  |                           |      |   |                    |   |     |   |  |      |  



Other income (expense)
consists of interest income, interest expense, accretion of interest and gain on sale of equipment. The decrease in other income for the six months ended June 30, 2005 was primarily due to the increase in interest expenses. Interest expense
increased for the six months ended June 30, 2005 as compared to the six months ended June 30, 2004 as a result of accreting the excess marketing expenses recorded on the balance sheet as Accrued marketing costs. Our actual cash
contribution to certain selling and marketing expenses for Fuzeon in 2004 was limited to approximately $10 million, even though Roche spent significantly more on these expenses. If certain cumulative levels of sales for Fuzeon in the United States
and Canada are achieved, our share of any additional expenses incurred by Roche during 2004 will be payable to Roche beginning at a future date over several years from that future date. During the second quarter of 2004, we reached our $10 million
limitation for the year. We recorded approximately $15.6 million as part of collaboration loss during the year ended December 31, 2004. This represented the net present value of our estimated share of the additional expenses, discounted at a
risk-free interest rate from the expected payment date based on achievement of the sales milestones in the agreement. Interest expense for the six months ended June 30, 2004 is related to interest payments on capital leases during that period. All
capital leases were paid off during 2004. The increase in interest expense was offset in part by an increase in interest income for the six months ended June 30, 2005 as compared to the six months ended June 30, 2004 as a result of increased
interest rates.



25



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##### Table of Contents

LIQUIDITY AND CAPITAL RESOURCES



The table below presents our cash flows for the six months ended June 30, 2005 as compared to the six months ended June 30,
2004.



|                                                     |  |                           |        |   |      |   |         |  
|---------------------------------------------------- |  | ------------------------- | ------ | - | ---- | - | ------- | -
|(in thousands)                                       |  | Six Months Ended June 30, |       
|                                                     |  | 2005                      |        |   | 2004 |  
|Net cash used by operating activities                |  | $                         | (5,145 | ) |      | $ | (24,658 | )
|Net cash provided by investing activities            |  |                           | 5,356  |   |      |   | 8,524   |  
|Net cash provided by financing activities            |  |                           | 506    |   |      |   | 222     |  
|                                                     |  |                           |        |   |      |   |         |  
|Net increase (decrease) in cash and cash equivalents |  |                           | 717    |   |      |   | (15,912 | )
|                                                     |  |                          
|Cash and cash equivalents, beginning of period       |  |                           | 28,101 |   |      |   | 45,285  |  
|                                                     |  |                           |        |   |      |   |         |  
|Cash and cash equivalents, end of period             |  | $                         | 28,818 |   |      | $ | 29,373  |  
|                                                     |  |                           |        |   |      |   |         |  



Operating
Activities. Since inception, we have financed our operations primarily through private placements and public offerings of common stock, equipment lease financing and payments under our collaboration agreement with Roche. The cash used by
operating activities was used primarily to fund research and development relating to Fuzeon, T-1249 and other product candidates and marketing costs for the commercialization of Fuzeon. Cash used by operating activities decreased for the six months
ended June 30, 2005 primarily due to the reduced net loss and the increase in the amount received from Roche for the collaboration.



Investing Activities. Cash provided by investing activities for the six months ended June 30, 2005 and 2004 resulted primarily from the net
maturities of investment securities-available-for-sale. The purchase and maturity of investment securities-available-for-sale was due to the normal maturity and repurchase of investments.



Financing Activities. Cash provided by financing activities for the six months ended June 30, 2005 resulted primarily
from proceeds from the exercise of stock options. Cash provided for the six months ended June 30, 2004 resulted primarily from proceeds from the exercise of stock options offset, in part, by principal payments under capital lease obligations.



Total Cash, Cash Equivalents and Investment
Securities-Available-for-Sale. As of June 30, 2005, we had $43.1 million in cash and cash equivalents and short-term-investments, compared to $48.4 million as of December 31, 2004.



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



| |  |  | expenditures for marketing activities related to Fuzeon,
| | - |  | --------------------------------------------------------



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



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



Under our collaboration agreement with Roche, we share gross profits equally from the sale of Fuzeon in the United States and Canada and we receive a
royalty on the net sales of Fuzeon outside of these two countries. Under provisions of this agreement, our actual cash contribution to the selling and marketing expenses for Fuzeon in 2004 was limited to approximately $10 million, even though Roche
spent significantly more on these expenses. If certain cumulative levels of sales for Fuzeon in the United States and Canada are achieved, our share of these additional expenses incurred by Roche during 2004 will be payable to Roche beginning at a
future date over several years from that future date. At June 30, 2005, we have recorded a liability of $16.1 million. This liability will increase, through the accretion of interest, to coincide with the beginning of our expected payment date
during 2011.



As of June 30, 2005, we had commitments of
approximately $940,000 to purchase product candidate materials and fund various clinical studies over the next twenty-four months contingent on delivery of the materials or performance of the services. Substantially all of these expenditures will be
shared equally by Roche under our collaboration agreement. Under this collaboration agreement, we are obligated to share equally the future development expenses for Fuzeon and T-1249 in the United States and Canada. We also expect to have capital
expenditures of approximately $800,000 during the remainder of 2005 that will not be shared with Roche. We may finance these expenditures with capital or operating leases, debt or working capital.



26



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Barring unforeseen developments, based on current sales levels of Fuzeon, we expect that our existing
capital resources, together with the interest earned thereon, will be adequate to fund our current programs through 2006. However, any reduction in Fuzeon sales below current levels or increase in expenditures beyond currently expected levels would
increase our capital requirements beyond our current expectations. If we require additional funds and such funds are not available through debt or equity financings, or collaboration arrangements, we will be required to delay, scale-back or
eliminate certain preclinical testing, clinical trials and research and development programs, including our collaborative efforts with Roche. In the event Roche becomes unable or unwilling to share future development expenses for Fuzeon and T-1249,
our capital requirements would increase substantially beyond our current expectations.



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



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



We may have difficulty raising additional funds by selling equity. If we fail
to meet the clinical and financial expectations of securities analysts and investors, it could have a material adverse effect on the market price of our common stock and restrict or eliminate our ability to raise additional funds by selling equity.
The public capital markets in which shares of our common stock are traded have been extremely volatile. Therefore, even if we do achieve positive clinical or financial results that meet or exceed the expectations of securities analysts and
investors, the state of the public equity markets in general and particularly the public equity market for biotechnology companies may prohibit us from raising funds in the equity markets on acceptable terms or at all. Even if we are able to obtain
additional funding through an equity financing, the terms of this financing could be highly dilutive to current shareholders.



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



Contractual Obligations.The following table summarizes our material contractual commitments at June 30, 2005 for the remainder of 2005 and subsequent years (in thousands):



|                                                              |  |      |       |      |   |       |  |      |       |      |   |            |  |       |       |  |   |        |  |   |       
|------------------------------------------------------------- |  | ---- | ----- | ---- | - | ----- |  | ---- | ----- | ---- | - | ---------- |  | ----- | ----- |  | - | ------ |  | - | ------
|Contractual Obligation                                        |  | 2005 |       | 2006 |   | 2007  |  | 2008 |       | 2009 |   | Thereafter |  | Total
|Operating leases*                                             |  | $    | 654   |      |   | 1,508 |  |      | 1,508 |      |   | 1,538      |  |       | 1,569 |  |   | 8,473  |  |   | 15,250
|Other contractual obligations**                               |  |      | 1,433 |      |   | 2,507 |  |      | 2,000 |      |   | 2,000      |  |       | 1,000 |  |   |       |  |   | 8,940 
|Other long-term liabilities reflected on the Balance Sheet*** |  |      |      |      |   |      |  |      |      |      |   |           |  |       |      |  |   | 16,129 |  |   | 16,129
|                                                              |  |      |       |      |   |       |  |      |       |      |   |            |  |       |       |  |   |        |  |   |       
|Total                                                         |  | $    | 2,087 |      | $ | 4,015 |  | $    | 3,508 |      | $ | 3,538      |  | $     | 2,569 |  | $ | 24,602 |  | $ | 40,319
|                                                              |  |      |       |      |   |       |  |      |       |      |   |            |  |       |       |  |   |        |  |   |       

---

|* | Includes payments due under a sublease signed during June 2004, which commenced on January 1, 2005, on an existing office and laboratory building.
|- | --------------------------------------------------------------------------------------------------------------------------------------------------

|** | We are making advance payments to Roche for our share of the cost of the capital improvements made at Roches Boulder facility where Fuzeon drug substance is
produced. Through a series of negotiations, we have reached an understanding in principle with Roche whereby we will pay Roche for our share of the capital invested in Roches
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### Table of Contents

| | manufacturing facility over a seven-year period. We are in the process of formalizing these terms in a written agreement. Our anticipated share of this
capital investment is approximately $14.0 million. At June 30, 2005, we have paid $5.5 million and accrued $500,000 (netted in our receivable from Roche) and expect to pay approximately $500,000 per quarter through June 2009. This amount, net of
charges to cost of goods sold, is recorded as an asset on our Balance Sheet under the caption Advanced paymentRoche. In the event our collaboration agreement is terminated, we would not be obligated for any unpaid amounts for
capital investment. This amount also includes $433,000 in 2005 and $507,000 in 2006 for contracts to purchase product candidate material and fund various clinical studies contingent on delivery of the materials or performance of the services.
Substantially all of these costs will be shared equally with Roche.
| | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|*** | Our actual cash contribution to the selling and marketing expenses for Fuzeon in 2004 was limited to approximately $10 million, even though Roche spent significantly more on
expenses of this nature. If certain cumulative levels of sales for Fuzeon in the United States and Canada are achieved, our share of any additional expenses incurred by Roche during 2004 will be payable to Roche beginning at a future date over
several years from that future date. We currently estimate this date to be in 2011. During the year ended December 31, 2004, we reached our $10 million limitation for the year. We recorded approximately $15.6 million as part of collaboration loss
during the year ended December 31, 2004. This represented the net present value of our estimated share of the additional expenses, discounted at a risk-free interest rate from the expected payment date based on achievement of the sales milestones in
the agreement. We are accreting, over time, the amount recorded at December 31, 2004 to the expected payment amount. The balance at June 30, 2005 including accretion is $16.1 million.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Off-Balance Sheet Arrangements



We do not have any off-balance sheet arrangements other than operating
leases for our properties. In the past we have entered into derivative transactions that represented call options sold on our stock to a third party financial institution and were entered into in order to generate cash from the option premiums and
provide us with the opportunity to raise capital at prices significantly in excess of the market price at the time of the transaction. All of these options have expired unexercised. In the event these options were exercised, we expect they would
have been settled by issuing shares of our stock. We may enter into similar transactions in the future, subject to market conditions. We enter into these transactions as a potential method to raise capital and not to speculate on the future market
price of our stock. We have no subsidiaries or other unconsolidated limited purpose entities, and we have not guaranteed or otherwise supported the obligations of any other entity.



Accounting and Other Matters



In November 2004, SFAS No. 151, Inventory Costs - an amendment of ARB No. 43, Chapter 4, was issued. SFAS No. 151 amends the guidance in ARB
No. 43, Chapter 4, Inventory Pricing, to clarify the accounting for abnormal amounts of idle facility expense, freight, handling costs, and wasted material (spoilage). Paragraph 5 of ARB 43, Chapter 4, previously stated that .
under some circumstances, items such as idle facility expense, excessive spoilage, double freight, and re-handling costs may be so abnormal as to require treatment as current period charges.  SFAS No. 151 requires that those items be
recognized as current-period charges regardless of whether they meet the criterion of so abnormal. In addition, SFAS No. 151 requires that allocation of fixed production overheads to the costs of conversion be based on the normal
capacity of the production facilities. SFAS No. 151 generally is effective for fiscal years beginning after June 15, 2005. We are assessing the impact of this statement on our financial statements.



In December 2004, SFAS No. 123 (revised), Share-Based Payment,
was issued. SFAS No. 123 (revised) requires that the cost resulting from all share-based payment transactions be recognized as a charge in the financial statements. This statement establishes fair value as the measurement objective in accounting for
share-based payment arrangements and requires all entities to apply a fair-value-based measurement method in accounting for share-based payment transactions with employees except for equity instruments held by employee share ownership plans. This
statement also establishes fair value as the measurement objective for transactions in which an entity acquires goods or services from non-employees in share-based payment transactions. This statement amends FASB Statement No. 95, Statement of Cash
Flows, to require that excess tax benefits be reported as a financing cash inflow rather than as a reduction of taxes paid. This Statement replaces FASB Statement No. 123, Accounting for Stock-Based Compensation, and supersedes APB Opinion No. 25,
Accounting for Stock Issued to Employees. SFAS No. 123 (revised) was initially effective as of the beginning of the first interim or annual reporting period that begins after June 15, 2005. In April 2005, the SEC announced an amendment to the
compliance date from the next reporting period beginning after June 15, 2005 to the next fiscal year beginning after June 15, 2005. We are assessing the impact of this statement on our financial statements.



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



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Net Operating Loss Carryforwards



As of December 31, 2004, we had a net operating loss carryforward for federal tax purposes of approximately $333.4 million.
We have recognized a valuation allowance equal to the deferred asset represented by this net operating loss carryforward and other deferred tax assets, net of deferred tax liabilities, and therefore recognized no tax benefit. Our ability to utilize
these net operating loss carryforwards may be subject to an annual limitation in future periods pursuant to the change in ownership rules under Section 382 of the Internal Revenue Code of 1986, as amended.



Critical Accounting Policies



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



Revenue Recognition Under Staff
Accounting Bulletin No. 104



Staff Accounting Bulletin
(SAB) No. 104, Revenue Recognition summarizes the SECs views in applying generally accepted accounting principles to revenue recognition in financial statements. SAB No. 104 establishes the SECs view that it is
not appropriate to recognize revenue until all of the following criteria are met: persuasive evidence that an arrangement exists; delivery has occurred or services have been rendered; the sellers price to the buyer is fixed or determinable;
and collectability is reasonably assured. Further, SAB No. 104 requires that both title and the risks and rewards of ownership be transferred to the buyer before revenue can be recognized. We believe that our revenue recognition policies are in
compliance with SAB No. 104.



Milestone Revenue and Deferred
RevenueRoche



SAB No. 104 provides guidance that it
is appropriate to recognize revenue related to license and milestone payments over the research and development term of a collaboration agreement. The primary estimates we make in connection with the application of this policy are the length of the
period of the research and development under our collaboration agreement with Roche and the estimated commercial life of Fuzeon. In the event our judgment of the length of these terms changes, the milestone revenue to be recognized under our
collaboration with Roche would change prospectively in accordance with Accounting Principles Board Opinion (APB) No. 20, Accounting Changes. If either term were expected to be longer, the amount of revenue recognized would be
less per quarter than currently being recognized. If either term were expected to be shorter, the amount of revenue recognized would be more per quarter than currently being recognized.



To date, the Company has received a $10 million license fee, research milestone payments of $15 million and has achieved
$3.3 million in manufacturing milestones. The license fee and research milestones were recorded as deferred revenue and are being recognized ratably over the research and development period. The manufacturing milestones were also recorded as
deferred revenue and are being recognized ratably through June 2013, which is the current expected commercial life of Fuzeon.



At the time of the license fee payment, Roche was granted a warrant to purchase Trimeris stock. The fair value of the warrant, $5.4 million, was credited
to additional paid-in capital in 1999, and as a reduction of the $10 million license fee payment.



Over the course of the collaboration, our estimate of the end of the research and development period has changed:



| |  |  | During the fourth quarter of 2002, we changed our estimate of the end of this research and development period to 2007 based on the expected development schedule of T-1249 or a
replacement compound, the final compound covered by our collaboration agreement with Roche.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | During the first quarter of 2004, we changed our estimate of the end of the research and development period to 2010 from 2007. This change was due to a change in estimate of the
development period for T-1249 or a replacement compound as further clinical development of T-1249 has been placed on hold. We recognized approximately $800,000 less of milestone revenue for the year ended December 31, 2004 compared to the year ended
December 31, 2003 due largely in part to this change in estimate.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | In January 2005, based on our current evaluation of our research and development programs, we placed further clinical development of T-1249 on hold indefinitely due
to challenges in achieving an extended release
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| | formulation that would allow significantly less dosing frequency. Taking into account the additional research that will be required to achieve our goals for
formulation, in January 2005, we changed our estimate of the end of the research and development period from December 2010 to December 2012; as a result we will recognize approximately $500,000 less milestone revenue in 2005 compared to 2004.
| | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



Collaboration Income/Loss



Product sales of Fuzeon began in the United States on March 27, 2003 and
are recorded by Roche. Under the collaboration agreement with Roche, the Company shares gross profits equally from the sale of Fuzeon in the United States and Canada with Roche, which is reported as collaboration income (loss) in the Statements of
Operations as a component of revenue. Collaboration income (loss) is calculated as follows: Total gross sales of Fuzeon in the United States and Canada is reduced by any estimated discounts, rebates or returns resulting in total net sales. Net sales
are reduced by costs of goods sold resulting in gross profit. Gross profit is reduced by selling and marketing expenses and other costs related to the sale of Fuzeon, resulting in operating income or loss. The Companys share of the operating
income or loss is reported as collaboration income or loss as a component of revenue. Roche previously had an exclusive distribution arrangement with Bioscrip to distribute Fuzeon in the United States. This exclusive arrangement terminated on April
26, 2004. Effective April 26, 2004, Fuzeon became available through retail and specialty pharmacies across the U.S. Prior to April 26, 2004, revenue from product sales was recognized when title and risk of loss had passed to Bioscrip, which is when
Bioscrip allocated drug for shipment to a patient. We do not believe there were any shipments that were as a result of incentives and/or in excess of the wholesalers ordinary course of business inventory level. Beginning April 26, 2004,
revenue is recognized when Roche ships drug and title and risk of loss passes to wholesalers. Roche prepares its estimates for sales returns and allowances, discounts and rebates based primarily on their historical experience with Fuzeon and other
anti-HIV drugs and their estimates of the payor mix for Fuzeon, updated for changes in facts and circumstances on a quarterly basis. If actual results differ from these estimates, these estimates will be adjusted which could have an effect on
results from operations in the period of adjustment.



Collaboration income/loss includes estimates made by and recorded by Roche for reductions to gross sales for expected returns of expired products, government rebate programs, such as Medicaid reimbursements, and customer incentives, such as
cash discounts for prompt payment. Estimates for government rebate programs and cash discounts are determined by Roche based on contractual terms, historical information from Roches anti-HIV drug portfolio, and Roches expectations
regarding future utilization rates for these programs. Estimates for product returns are based on an on-going analysis of industry return patterns and historical return patterns by Roche for its anti-HIV drug portfolio. This includes the purchase of
third-party data by Roche to assist Roche and us in monitoring channel inventory levels and subsequent prescriptions for Fuzeon. We also monitor the activities and clinical trials of our key competitors and assess the potential impact on future
Fuzeon sales and return expectations where necessary. Expected returns for Fuzeon are generally low as Fuzeon has a high Wholesale Acquisition Cost, or WAC, compared to other anti-HIV drugs, and requires significantly more storage space than other
anti-HIV drugs due to the size of a monthly kit because Fuzeon requires twice daily injections. Consequently wholesalers tend to stock only the necessary volumes of Fuzeon inventory. We believe that wholesalers hold less than a month supply of
Fuzeon inventory. The current shelf life of Fuzeon is 36 months. Roche reviews the estimates discussed above on a quarterly basis and revises estimates as appropriate for changes in facts or circumstances. These estimates reduce our share of
collaboration income or loss under our collaboration agreement.



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



Compensation costs for stock options granted to non-employees are accounted for in accordance with Statement of Financial Accounting Standards (SFAS) No. 123 and Emerging Issues Task Force
(EITF) Issue No. 96-18, which require that such compensation costs be measured at the end of each reporting period to account for changes in the fair value of the Companys common stock until the options are vested. These costs are
non-cash charges resulting from stock option grants to non-employees. The primary estimate we make in connection with the calculation of this expense is the future volatility of our stock price used to calculate the value of the stock options in the
Black-Scholes option-pricing model. At June 30, 2005, we estimated the future volatility at 45% based on the implied future volatility for call options in our stock quoted on the Chicago Board Options Exchange in April 2005. A higher volatility
would result in greater compensation costs, and a lower volatility would result in lower compensation costs for these stock options.



In addition, the closing market price per share of our stock at the end of each reporting period has a significant effect on the value of the stock
options calculated using the Black-Scholes option-pricing model. A higher market price per share of our stock would result in greater compensation costs, and a lower market price per share of our stock would result in lower compensation costs for
these stock options. At June 30, 2005, there were options to purchase approximately 20,000 shares of common stock granted to non-employees outstanding that were not fully vested that could result in additional changes in compensation costs under
EITF 96-18.



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Capitalization of Patent Costs



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



Accrued Marketing Costs



In 2004, we reached an agreement with Roche whereby our actual cash contribution to certain selling and marketing expenses for Fuzeon in 2004 is limited to approximately $10 million, even though Roche spent significantly more on these
expenses. If certain cumulative levels of sales for Fuzeon in the United States and Canada are achieved, our share of any additional expenses incurred by Roche during 2004 will be payable to Roche beginning at a future date over several years from
that future date. We currently estimate this date to be in 2011. During the six months ended June 30, 2004, we reached our $10 million limitation for the year. We recorded an expense, and associated liability, of approximately $15.6 million as part
of collaboration loss during the year ended December 31, 2004. This represented the net present value of our estimated share of the additional expenses, discounted at a risk free interest rate from the expected payment date based on achievement of
the sales milestones in the agreement. We are increasing the liability over time to the expected payment amount. In 2004, we increased this liability by $154,000, for accretion of interest. During the six months ended June 30, 2005, we increased
this liability by an additional $368,000, for accretion of interest. The total liability of $16.1 million is reflected on our balance sheet under the caption Accrued marketing costs.



Advanced PaymentRoche



We are making advance payments to Roche for our share of the cost of the
capital improvements made at Roches Boulder facility where Fuzeon drug substance is produced. Through a series of negotiations, we have reached an understanding in principle with Roche whereby we will pay Roche for our share of the capital
invested in Roches manufacturing facility over a seven-year period. We are in the process of formalizing these terms in a written agreement. Our anticipated share of this capital investment is approximately $14.0 million. At June 30, 2005, we
have paid $5.5 million and accrued $500,000 and expect to pay approximately $500,000 per quarter through June 2009. This amount, net of charges to cost of goods sold, is recorded as an asset on our Balance Sheet under the caption Advanced
paymentRoche. This asset will be amortized to cost of goods sold based on the units of Fuzeon sold during the collaboration period. We estimate that as of June 30, 2005, this asset has a remaining useful life of approximately 11 years.
In the event our collaboration agreement is terminated, we would not be obligated for any unpaid amounts for capital investment. In addition, other peptide drug candidates discovered under our collaboration with Roche, including T-1249, can be
manufactured using this same Roche facility. The carrying value of this asset will be evaluated annually for impairment or if a triggering event occurs.



Item 3. Quantitative and Qualitative Disclosures About Market Risk



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



The table below presents the carrying value, which is
approximately equal to fair market value, and related weighted-average interest rates for our investment portfolio at June 30, 2005. Fair market value is based on actively quoted market prices. Our investments are generally most vulnerable to
changes in short-term interest rates in the United States. Substantially all of our investments mature in twelve months or less, and have been given a rating of A1 or higher by a nationally recognized statistical rating organization or are the debt
obligations of a federal agency and, therefore, we believe that the risk of material loss of principal due to changes in interest rates is minimal.



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|                                                    |  |                 |        |                      |      |  
|--------------------------------------------------- |  | --------------- | ------ | -------------------- | ---- | -
|                                                    |  | Carrying Amount |        | AverageInterest Rate |     
|                                                    |  | (thousands)     |        |                      |     
|Cash equivalents - fixed rate                       |  | $               | 28,037 |                      | 2.71 | %
|Investment securities-available-for-sale-fixed rate |  |                 | 14,282 |                      | 3.19 | %
|Overnight cash investments - fixed rate             |  |                 | 781    |                      | 2.53 | %
|                                                    |  |                 |        |                      |      |  
|Total investment securities                         |  | $               | 43,100 |                      | 2.86 | %
|                                                    |  |                 |        |                      |      |  



Item 4. Controls and Procedures



Our Chief Executive Officer and Chief Financial Officer reviewed and evaluated the effectiveness of our disclosure controls and procedures, with the participation of the Companys management, as of June 30, 2005. Disclosure controls
and procedures are controls and procedures that are designed to ensure that information required to be disclosed in our reports filed or submitted under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the
time periods specified in the SECs rules and forms. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives and
management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Based on the evaluation of our disclosure controls and procedures as of June 30, 2005, our Chief Executive Officer and Chief
Financial Officer have each concluded that, as of such date, our disclosure controls and procedures were effective at the reasonable assurance level.



No change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Securities and Exchange Act of 1934)
occurred during the fiscal quarter ended June 30, 2005 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.



PART II. OTHER INFORMATION



Item 1. Legal Proceedings



None
..



Item 2. Unregistered Sales of Equity Securities and Use of Proceeds



(a) Not applicable.



(b) Not applicable.



(c) Not applicable



Item 3. Defaults Upon Senior Securities



Not applicable.



Item 4. Submission of Matters to a Vote of Security Holders



Not applicable



Item 5. Other Information



None



Item 6. Exhibits



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



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



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SIGNATURES



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



|               |  |                |  |                                                                 
|-------------- |  | -------------- |  | ----------------------------------------------------------------
|               |  | Trimeris, Inc.
|               |  | (Registrant)  
|               |  |               
|August 8, 2005 |  | By:            |  | /s/ STEVEN D. SKOLSKY                                           
|               |  |                |  | Steven D. Skolsky                                               
|               |  |                |  | Chief Executive Officer                                         
|               |  |               
|August 8, 2005 |  | By:            |  | /s/ ROBERT R. BONCZEK                                           
|               |  |                |  | Robert R. Bonczek                                               
|               |  |                |  | Chief Financial Officer (Principal Financial
Officer)           
|               |  |               
|August 8, 2005 |  | By:            |  | /s/ ANDREW L. GRAHAM                                            
|               |  |                |  | Andrew L. Graham                                                
|               |  |                |  | Director of Finance and Secretary (Principal
Accounting Officer)



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##### Table of Contents

EXHIBIT INDEX



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



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