SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

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         Date of Report (Date of earliest event reported): July 22, 2004
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                                VICOR CORPORATION
               (Exact name of Registrant as specified in charter)



   Delaware                           0-18277                 04-2742817
- -------------------             ------------------------      ----------------
(State or other jurisdiction    (Commission file number)     (IRS employer
of incorporation)                                           identification no.)




                 25 Frontage Road, Andover, Massachusetts 01810
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               (Address of principal executive offices) (Zip Code)



                                 (978) 470-2900
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              (Registrant's telephone number, including area code)

                                       N/A
                                       ---
 (Former name, former address and former fiscal year, if changed since last
                                    report)



Item 5. Other Events and Regulation FD Disclosure On July 22, 2004, Vicor Corporation issued a press release regarding an annual cash dividend. The full text of that press release is attached as Exhibit 99.1 hereto and incorporated by reference herein. Item 7. Exhibits. (c) Exhibits. The following exhibit is being furnished herewith: Exhibit Number Title - ------ ----- 99.1 Vicor's Board of Directors Approves Annual Cash Dividend. [Remainder of page left blank intentionally] 2

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. VICOR CORPORATION Dated: July 22, 2004 By: /s/ Mark A. Glazer ----------------------------------------- Name: Mark A. Glazer Title: Chief Financial Officer 3

EXHIBIT INDEX Exhibit Number Title - ------ ----- 99.1 Vicor Corporation's press release dated July 22, 2004. 4

                                                                    Exhibit 99.1

Vicor's Board of Directors Approves Annual Cash Dividend

    ANDOVER, Mass.--(BUSINESS WIRE)--July 22, 2004--Vicor Corporation
(NASDAQ: VICR) today announced that its Board of Directors has
approved an annual cash dividend for 2004 of $.08 per share of the
Company's stock.
    The dividend is payable on August 31, 2004 to shareholders of
record at the close of business on August 11, 2004.
    Dividends are declared at the discretion of the Company's Board of
Directors and depend on actual cash from operations, the Company's
financial condition and capital requirements and any other factors the
Company's Board of Directors may consider relevant.
    Vicor Corporation designs, develops, manufactures and markets
modular power components and complete power systems based upon a
portfolio of patented technologies. Headquartered in Andover,
Massachusetts, Vicor sells its products primarily to the
telecommunications, electronic data processing, industrial control and
military electronics markets. For more information on Vicor and its
products, please visit the Company's website at www.vicorpower.com.

    CONTACT: Vicor Corporation
             Mark A. Glazer, 978-470-2900
             Chief Financial Officer