SEC Form 4 · accession 0000901484-26-000028

VICOR CORP · VICR

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Patrizio Vinciarelli

Officer — Chairman & CEO · Director · 10% Owner

Period of report

Jun 22, 2026

Accepted (ET)

Jun 24, 2026 · 1:51 pm EDT

Rule 10b5-1 plan

yes — trade under a plan

Issuer CIK

0000751978

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F3	Jun 22, 2026	S	200	$351.715	D	8,527,890	D
Common Stock^F4	Jun 22, 2026	S	600	$354.0839	D	8,527,290	D
Common Stock^F5	Jun 22, 2026	S	918	$355.3335	D	8,526,372	D
Common Stock^F6	Jun 22, 2026	S	1,382	$356.3089	D	8,524,990	D
Common Stock^F7	Jun 22, 2026	S	2,728	$357.4633	D	8,522,262	D
Common Stock^F8	Jun 22, 2026	S	872	$358.8851	D	8,521,390	D
Common Stock^F9	Jun 22, 2026	S	900	$359.5289	D	8,520,490	D
Common Stock^F10	Jun 22, 2026	S	1,589	$360.5388	D	8,518,901	D
Common Stock^F11	Jun 22, 2026	S	1,988	$361.7277	D	8,516,913	D
Common Stock^F12	Jun 22, 2026	S	2,613	$362.6652	D	8,514,300	D
Common Stock^F13	Jun 22, 2026	S	2,140	$363.5932	D	8,512,160	D
Common Stock^F14	Jun 22, 2026	S	2,260	$364.5963	D	8,509,900	D
Common Stock^F15	Jun 22, 2026	S	416	$365.6317	D	8,509,484	D
Common Stock^F16	Jun 22, 2026	S	799	$366.7377	D	8,508,685	D
Common Stock^F17	Jun 22, 2026	S	495	$367.6685	D	8,508,190	D
Common Stock^F18	Jun 22, 2026	S	100	$368.80	D	8,508,090	D
Common Stock^F1	holding	—	—		—	167,125	I	See Footnote

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person.
F10The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $360.1800 and $361.1700.
F11The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $361.1900 and $362.1800.
F12The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $362.1900 and $363.1600.
F13The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $363.2200 and $364.2100.
F14The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $364.2200 and $365.2100.
F15The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $365.2400 and $366.2200.
F16The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $366.2900 and $367.2500.
F17The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $367.3600 and $368.2100.
F18The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $368.8000 and $368.8000.
F2This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.
F3The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $351.3800 and $352.0500. The reporting person undertakes to provide to Vicor Corporation, any security holder of Vicor Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) through (18) to this Form 4.
F4The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $353.8400 and $354.3500.
F5The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $354.9500 and $355.9000.
F6The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $355.9600 and $356.7000.
F7The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $357.0000 and $357.9700.
F8The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $358.1400 and $359.0900.
F9The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $359.1400 and $359.9800.