================================================================================ 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 November 21, 2006 Diomed Holdings, Inc. Delaware 000-32045 84-1480636 (State or other jurisdiction (Commission File Number) (IRS Employer of incorporation) Identification No.) 1 Dundee Park Andover, MA 01810 (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: (978-475-7771) Item 7.01 Regulation FD Disclosure On November 21, 2006, Diomed Holdings, Inc. issued a press release announcing that the court presiding over the patent infringement lawsuit filed by VNUS Medical Technologies, Inc. against Diomed and others issued a "Markman" order, construing certain language in the VNUS patents-in-suit. A copy of this press release is attached as Exhibit 99.1. Item 9.01 Financial Statements and Exhibits 99.1 Press Release Issued November 21, 2006 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. Diomed Holdings, Inc. (Registrant) Date: November 21, 2006 By: /s/ DAVID B. SWANK ------------------------------------- Name: David B. Swank Title: Chief Financial Officer List of Exhibits: 99.1 Press Release Issued November 21, 2006