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): November 19, 2003 ARIAD PHARMACEUTICALS, INC. --------------------------- (Exact Name of Registrant as Specified in its Charter) Delaware 0-21696 22-3106987 -------- ------- ---------- (State or Other Jurisdiction (Commission File Number) (I.R.S. Employer of Incorporation) Identification No.) 26 LANDSDOWNE STREET CAMBRIDGE, MASSACHUSETTS 02139 (Address of principal executive offices and zip code) Registrant's telephone number, including area code: (617) 494-0400 ITEM 5. OTHER EVENTS On November 19, 2003, the Registrant disseminated a Press Release announcing the first reported high-resolution structure of a small-molecule drug (its product candidate AP23464) bound to an important cancer-associated protein (kinase) target known as Src. The information contained in the Press Release dated November 19, 2003, is incorporated herein by reference and attached as Exhibit 99.1 hereto. ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS. (c) Exhibits. 99.1 The Registrant's Press Release dated November 19, 2003. SIGNATURES 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 thereunto duly authorized. ARIAD PHARMACEUTICALS, INC. By: /s/ Edward M. Fitzgerald ------------------------ Edward M. Fitzgerald Senior Vice President and Chief Financial Officer Date: November 19, 2003 2 EXHIBIT INDEX Exhibit Number Description Sequential Page Number - ------- ----------- ---------------------- 99.1 The Registrant's Press Release dated November 19, 2003. 4 3