================================================================================ UNITED STATES 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 May 8, 2003 Date of Report (Date of earliest event reported) ------------------ ZymoGenetics, Inc. (Exact name of registrant as specified in its charter) Washington 0-33489 91-1144498 (State or other Jurisdiction (Commission File Number) (IRS Employer of Incorporation) Identification Number) 1201 Eastlake Avenue East Seattle, Washington 98102-3702 (Address of principal executive offices) (Zip Code) 206-442-6600 (Registrant's telephone number, including area code) N/A (Former Name or Former Address, if Changed Since Last Report) Item 7. Financial Statements, Pro Forma Financial Information And Exhibits. (c) Exhibits. Exhibit 99.1 - Press Release dated May 8, 2003 of ZymoGenetics, Inc. Item 9. Regulation FD Disclosure In accordance with the interim guidance of the Securities and Exchange Commission set forth in SEC Release No. 33-8216, ZymoGenetics, Inc. (the "Registrant") is furnishing the information required by Item 12 of Form 8-K under "Item 9 Regulation FD Disclosure" and information contained in this report (including exhibits hereto) shall not be deemed filed under the Securities and Exchange Commission's rules and regulations and shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended. On May 8, 2003, the Registrant issued a press release announcing its results of operations and financial condition for the three months ended March 31, 2003. The full text of the press release is set forth in Exhibit 99.1 attached hereto. The press release should be read in conjunction with the note regarding forward-looking statements, which is included in the text of the press release. 2 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. ZYMOGENETICS, INC. Date: May 8, 2003 By: /s/ JAMES A. JOHNSON ------------------------------- Name: James A. Johnson Title: Senior Vice President, and Chief Financial Officer 3 EXHIBIT INDEX Exhibit Number Document Description - ------- -------------------- 99.1 Press release dated May 8, 2003 of ZymoGenetics, Inc. 4