SEC Form 4 · accession 0000901484-26-000030

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 23, 2026

Accepted (ET)

Jun 25, 2026 · 10:47 am 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 23, 2026	S	600	$326.6833	D	8,507,490	D
Common Stock^F4	Jun 23, 2026	S	500	$327.884	D	8,506,990	D
Common Stock^F5	Jun 23, 2026	S	600	$329.7867	D	8,506,390	D
Common Stock^F6	Jun 23, 2026	S	1,000	$331.1742	D	8,505,390	D
Common Stock^F7	Jun 23, 2026	S	400	$331.8175	D	8,504,990	D
Common Stock^F8	Jun 23, 2026	S	805	$333.1021	D	8,504,185	D
Common Stock^F9	Jun 23, 2026	S	1,400	$334.1828	D	8,502,785	D
Common Stock^F10	Jun 23, 2026	S	3,295	$335.6377	D	8,499,490	D
Common Stock^F11	Jun 23, 2026	S	2,000	$336.4575	D	8,497,490	D
Common Stock^F12	Jun 23, 2026	S	400	$337.28	D	8,497,090	D
Common Stock^F13	Jun 23, 2026	S	899	$338.462	D	8,496,191	D
Common Stock^F14	Jun 23, 2026	S	2,201	$339.8206	D	8,493,990	D
Common Stock^F15	Jun 23, 2026	S	1,900	$340.8201	D	8,492,090	D
Common Stock^F16	Jun 23, 2026	S	600	$341.8458	D	8,491,490	D
Common Stock^F17	Jun 23, 2026	S	600	$342.9444	D	8,490,890	D
Common Stock^F18	Jun 23, 2026	S	1,000	$344.277	D	8,489,890	D
Common Stock^F19	Jun 23, 2026	S	1,200	$345.3423	D	8,488,690	D
Common Stock^F20	Jun 23, 2026	S	600	$347.07	D	8,488,090	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 $335.0700 and $336.0100.
F11The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.0900 and $337.0000.
F12The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $337.1300 and $337.5700.
F13The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.2200 and $339.0900.
F14The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.2300 and $340.2100.
F15The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $340.3200 and $341.3000.
F16The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.3500 and $342.2600.
F17The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.4300 and $343.3800.
F18The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $343.9900 and $344.9400.
F19The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $345.2000 and $345.9900.
F2This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.
F20The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $346.9500 and $347.1500.
F3The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.4200 and $326.8800. 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 (20) 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 $327.4200 and $328.2900.
F5The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.5000 and $330.4800.
F6The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $330.6100 and $331.6000.
F7The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.6200 and $332.3300.
F8The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.7700 and $333.5000.
F9The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.9000 and $334.5300.