SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 ------------------------- FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2005 VAXGEN, INC. (Exact name of Registrant as Specified in its Charter) DELAWARE 0-26483 94-3236309 (State or other jurisdiction of (Commission File Number) (I.R.S. Employer incorporation or organization) Identification Number) 1000 MARINA BLVD., SUITE 200, BRISBANE, CALIFORNIA 94005 (Address of Principal Administrative Offices) Registrant's Telephone Number, Including Area Code: (650) 624-1000 - -------------------------------------------------------------------------------- (Former name or former address, if changed since last report.) ------------------- Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: |_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) SECTION 1--REGISTRANT'S BUSINESS AND OPERATIONS Item 1.01. Entry into a Material Definitive Agreement. On April 29, 2005, VaxGen, Inc. (the "Company") and EndoBiologics International Corporation ("EndoBiologics") entered into a Collaboration Agreement (the "Agreement"). The Agreement provides for a cooperative research relationship between EndoBiologics and the Company. Pursuant to the Agreement, EndoBiologics will provide and/or prepare appropriate conjugates using its proprietary technology and know-how as part of a proof-of-concept study and the Company will evaluate such conjugates for biological activity as a vaccine against Neisseria meningitidis serogroup B. The Agreement also provides that the Company will have the exclusive option of obtaining the exclusive license rights to the EndoBiologics technology and intellectual property for use in making, developing and commercializing oligosaccharide and polysaccharide compounds and conjugates for commercial use as vaccines against Neisseria meningitidis serogroup B, including conducting appropriate clinical research and experiments on such conjugates with the intention of identifying and selecting vaccines for further development and commercialization. Pursuant to the Agreement the Company will make certain payments EndoBiologics for the proof-of-concept study, and at the Company's option, shall make further payments to continue the collaboration, including payments based upon the completion of certain milestones. SECTION 8--OTHER EVENTS Item 8.01. Other Events. On May 4, 2005, VaxGen, Inc. issued a press release entitled, "VaxGen and EndoBiologics Form Collaboration to Pursue Early Stage Research for Meningitis B Vaccine". This press release is attached as Exhibit 99.1 to this report and is incorporated herein by reference. SECTION 9--FINANCIAL STATEMENTS AND EXHIBITS Item 9.01. Financial Statements and Exhibits. (a) Financial Statements of Businesses Acquired. Not applicable. (b) Pro Forma Financial Information. Not applicable. (c) Exhibits. Exhibit No. Description - ----------- ----------- 99.1 Press release dated May 4, 2005, entitled, "VaxGen and EndoBiologics Form Collaboration to Pursue Early Stage Research for Meningitis B Vaccine". SIGNATURE Pursuant to 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 hereunto duly authorized. VaxGen, Inc. (Registrant) Dated: May 5, 2005 By: /s/ James M. Cunha -------------------------------------- James M. Cunha Chief Financial Officer EXHIBIT INDEX Exhibit No. Description - ----------- ----------- 99.1 Press release dated May 4, 2005 entitled, "VaxGen and EndoBiologics Form Collaboration to Pursue Early Stage Research for Meningitis B Vaccine".