SEC Form 4 · accession 0000901484-26-000023

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 12, 2026

Accepted (ET)

Jun 16, 2026 · 1:35 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 12, 2026	S	401	$296.1176	D	8,627,689	D
Common Stock^F4	Jun 12, 2026	S	99	$297.18	D	8,627,590	D
Common Stock^F5	Jun 12, 2026	S	279	$299.0075	D	8,627,311	D
Common Stock^F6	Jun 12, 2026	S	797	$299.884	D	8,626,514	D
Common Stock^F7	Jun 12, 2026	S	944	$300.9437	D	8,625,570	D
Common Stock^F8	Jun 12, 2026	S	589	$302.1446	D	8,624,981	D
Common Stock^F9	Jun 12, 2026	S	4,716	$303.5916	D	8,620,265	D
Common Stock^F10	Jun 12, 2026	S	1,591	$304.4692	D	8,618,674	D
Common Stock^F11	Jun 12, 2026	S	2,252	$305.349	D	8,616,422	D
Common Stock^F12	Jun 12, 2026	S	3,382	$306.369	D	8,613,040	D
Common Stock^F13	Jun 12, 2026	S	2,443	$307.4799	D	8,610,597	D
Common Stock^F14	Jun 12, 2026	S	1,707	$308.3358	D	8,608,890	D
Common Stock^F15	Jun 12, 2026	S	800	$309.1963	D	8,608,090	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 $303.92 and $304.86.
F11The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $304.93 and $305.92.
F12The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $305.93 and $306.915.
F13The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $307.00 and $307.99.
F14The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.00 and $308.82.
F15The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $309.01 and $309.33.
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 $295.97 and $296.72. 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 (15) 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 $297.18 and $297.18.
F5The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $298.46 and $299.43.
F6The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $299.53 and $300.51.
F7The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $300.61 and $301.51.
F8The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $301.745 and $302.67.
F9The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $302.89 and $303.87.