SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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): SEPTEMBER 17, 2002 CUBIST PHARMACEUTICALS, INC. (Exact Name of Registrant as Specified in Charter) DELAWARE 0-21379 22-3192085 - ------------------------------------------------------------------------------- (State or Other Jurisdiction (Commission (IRS Employer of Incorporation) File Number) Identification No.) 65 HAYDEN AVENUE, LEXINGTON, MASSACHUSETTS 02421 --------------------------------------------------- (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: (781) 860-8660 ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. (c) EXHIBITS. 99.1 Transcript of September 17, 2002 conference call ITEM 9. REGULATION FD DISCLOSURE. On September 17, 2002, the Registrant participated in a telephone conference call hosted by Pacific Growth Equities, Inc., an investment bank. The conference call transcript has been filed as an exhibit to this Report on Form 8-K, attached hereto as Exhibit 99.1. The attached transcript is not "filed" pursuant to the Securities Exchange Act and is not incorporated by reference into any Securities Act registration statements. Additionally, the submission of this report on Form 8-K is not an admission as to the materiality of any information in this report that is required to be disclosed solely by Regulation FD. 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 hereunto duly authorized. CUBIST PHARMACEUTICALS, INC. By: /s/ THOMAS A. SHEA ------------------------------- Thomas A. Shea Vice President Finance and Administration, Chief Financial Officer, Treasurer Dated: September 17, 2002