Vicor Corporation filed a Current Report on Form 8-K with the Securities and Exchange Commission on September 10, 2026, disclosing an amendment to its corporate bylaws. The filing, dated September 9, 2026, details changes made by the Board of Directors to the company's governing documents.

The amendment specifically targets Article II, Section 6 of the bylaws, which governs the removal of directors. The Board of Directors of Vicor Corporation, based in Andover, Massachusetts, approved the changes to clarify the language regarding this section.

The report confirms that the amendments became effective on September 9, 2026. The full text of the updated bylaws is included as Exhibit 3.1 (unmarked version) and Exhibit 3.2 (marked version) to the filing.