8-K VICOR CORP false 0000751978 0000751978 2026-07-21 2026-07-21 UNITED STATES 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): July 21, 2026 VICOR CORPORATION (Exact Name of Registrant as Specified in its Charter) Delaware 0-18277 04-2742817 (State or Other Jurisdiction of Incorporation) (Commission File Number) (IRS Employer Identification No.) 25 Frontage Road , Andover , Massachusetts 01810 (Address of Principal Executive Offices) (Zip Code) (978) 470-2900 (Registrant’s telephone number, including area code) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, par value $0.01 per share VICR The NASDAQ Stock Market LLC Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934. Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Item 2.02. Results of Operations and Financial Condition On July 21, 2026, Vicor Corporation issued a press release announcing its financial results for the three and six months ended June 30, 2026. The full text of that press release is attached as Exhibit 99.1 hereto and incorporated by reference herein. The information furnished under this Item 2.02, including the Exhibit attached hereto, shall not be deemed “filed” for any purpose, including for purposes of Section 18 of the Securities and Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, regardless of any general incorporation language in such filing. Item 9.01. Financial Statements and Exhibits (a) Financial statements: None (b) Pro forma financial information: None (c) Shell company transactions: None (d) Exhibits 99.1 Press Release of Vicor Corporation dated July 21, 2026 Exhibit Index Exhibit No. Description 99.1 Press Release of Vicor Corporation dated July 21, 2026 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) 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 Date: July 21, 2026 By: /s/ James F. Schmidt James F. Schmidt Chief Financial Officer

Vicor Corporation announced its financial results for Q2 and H1 2026 on July 21, 2026, providing shareholders with updates on revenues, net income, and earnings per share to reflect the company's financial health and operational performance.

On July 21, 2026, Vicor Corporation announced its financial results for the three and six months ended June 30, 2026. This announcement was made via a press release detailing key financial metrics such as revenues, net income, and earnings per share for the respective periods. The release aims to provide shareholders and the public with an update on the company's financial condition and operational performance. This information is crucial for investors as it reflects the company's ongoing business health and future outlook.

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