Alex Gusinov - 04 Nov 2025 Form 4 Insider Report for VICOR CORP (VICR)

Role: Corp. Vice President Eng.
Signature: /s/Quentin Fendelet Attorney in fact for Alex Gusinov
Issuer symbol: VICR
Transactions as of: 04 Nov 2025
Net transactions value: +$154,671
Form type: 4
Filing time: 05 Nov 2025, 11:15:06 UTC
Previous filing: 29 Oct 2025
Next filing: 24 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Gusinov Alex	Corp. Vice President Eng.	25 FRONTAGE RD., ANDOVER	/s/Quentin Fendelet Attorney in fact for Alex Gusinov	05 Nov 2025	0001654925

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	VICR	Common Stock	Options Exercise	$37,336	+616	+4.9%	$60.61	13,296	04 Nov 2025	Direct
transaction	VICR	Common Stock	Options Exercise	$83,844	+2,015	+15%	$41.61	15,311	04 Nov 2025	Direct
transaction	VICR	Common Stock	Options Exercise	$33,491	+444	+2.9%	$75.43	15,755	04 Nov 2025	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	VICR	Non Qualified Stock Option	Options Exercise	$0	-616	-25%	$0.000000	1,848	04 Nov 2025	Common Stock	616	$60.61	Direct	F1
transaction	VICR	Non Qualified Stock Option	Options Exercise	$0	-2,015	-20%	$0.000000	8,058	04 Nov 2025	Common Stock	2,015	$41.61	Direct	F1
transaction	VICR	Non Qualified Stock Option	Options Exercise	$0	-444	-33%	$0.000000	888	04 Nov 2025	Common Stock	444	$75.43	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Options expire 2 years from each vesting date.