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 August 7, 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 August 7, 2003 of ZymoGenetics, Inc. Item 12. Results of Operations and Financial Condition On August 7, 2003, the Registrant issued a press release announcing its results of operations and financial condition for the three and six months ended June 30, 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. The information in this Current Report on Form 8-K, including the exhibits, will not be treated as "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934 (the "Exchange Act") or otherwise subject to the liabilities of that section. This information will not be incorporated by reference into any filing under the Securities Act of 1933, or into another filing under the Exchange Act, unless that filing expressly incorporates this information by reference. 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: August 7, 2003 By: /s/ JAMES A. JOHNSON -------------------- Name: James A. Johnson Title: Senior Vice President, and Chief Financial Officer 3 EXHIBIT INDEX Exhibit Document Description Number 99.1 Press release dated August 7, 2003 of ZymoGenetics, Inc. 4