UNITED STATES 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 reported) July 24, 2003 --------------- TheraSense, Inc. -------------------------- (Exact name of registrant as specified in its chapter) Delaware 000-33139 94-3267373 ---------------------------------- ------------------ --------------------- (State or other jurisdiction (Commission (IRS Employer of incorporation File Number) Identification No.) 1360 South Loop Road, Alameda, California 94502 ---------- (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code (510) 749-5400 ----------------- Not Applicable ---------------------------------------------------------------------- (Former name or former address, if changed since last report) ITEM 7: FINANCIAL STATEMENTS AND EXHIBITS (c) Exhibits 99.1 Earnings Press Release, dated July 24, 2003 ITEM 9: REGULATION FD DISCLOSURE On July 24, 2003 the Company announced its financial results for the Quarter ended June 30, 2003. A copy of the press release containing the announcement is included as Exhibit 99.1 to this Current Report and is incorporated herein by reference. The Company does not intend for this exhibit to be incorporated by reference into future filings under the Securities Exchange Act of 1934. The foregoing information is provided pursuant to Item 12 (Results of Operations and Financial Condition) of Form 8-K. 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. Date: July 24, 2003 THERASENSE, INC. By: /s/ W. MARK LORTZ ------------------------------------- W. Mark Lortz President, Chief Executive Officer and Chairman 2