SEC Form 4 · accession 0000901484-26-000017

VICOR CORP · VICR

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

Reporting owner

Patrizio Vinciarelli

Officer — Chairman and CEO · Director · 10% Owner

Period of report

Jun 4, 2026

Accepted (ET)

Jun 5, 2026 · 12:10 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 4, 2026	S	1,600	$305.1506	D	8,746,490	D
Common Stock^F4	Jun 4, 2026	S	1,673	$307.6911	D	8,744,817	D
Common Stock^F5	Jun 4, 2026	S	3,200	$309.0794	D	8,741,617	D
Common Stock^F6	Jun 4, 2026	S	1,863	$310.4686	D	8,739,754	D
Common Stock^F7	Jun 4, 2026	S	2,762	$311.5272	D	8,736,992	D
Common Stock^F8	Jun 4, 2026	S	1,337	$312.4534	D	8,735,655	D
Common Stock^F9	Jun 4, 2026	S	1,265	$313.4425	D	8,734,390	D
Common Stock^F10	Jun 4, 2026	S	2,000	$314.8296	D	8,732,390	D
Common Stock^F11	Jun 4, 2026	S	1,900	$315.9445	D	8,730,490	D
Common Stock^F12	Jun 4, 2026	S	1,600	$316.9819	D	8,728,890	D
Common Stock^F13	Jun 4, 2026	S	400	$317.8225	D	8,728,490	D
Common Stock^F14	Jun 4, 2026	S	400	$319.215	D	8,728,090	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 $314.3200 to $315.2300.
F11The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.3400 to $316.3000.
F12The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $316.4800 to $317.4200.
F13The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $317.4800 to $318.0000.
F14The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.2000 to $319.2300.
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 $304.7300 to $305.6400. 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 (14) 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 $307.4400 to $308.1500.
F5The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.6000 to $309.5100.
F6The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $309.9000 to $310.8300.
F7The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $310.9100 to $311.8900.
F8The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $311.9600 to $312.8800.
F9The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.0400 to $313.7400.