Alex Gusinov - 02 May 2025 Form 4 Insider Report for VICOR CORP (VICR)

Role: Corp. VP Engineering
Signature: /s/Quentin A. Fendelet Attorney in fact for Alex Gusinov
Issuer symbol: VICR
Transactions as of: 02 May 2025
Net transactions value: $0
Form type: 4
Filing time: 05 May 2025, 15:06:52 UTC
Previous filing: 14 Nov 2024
Next filing: 29 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Gusinov Alex	Corp. VP Engineering	25 FRONTAGE RD., ANDOVER	/s/Quentin A. Fendelet Attorney in fact for Alex Gusinov	05 May 2025	0001654925

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	VICR	Common Stock						16,672	02 May 2025	Direct	F1

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	Award	$0	+9,046		$0.000000	9,046	02 May 2025	Common Stock	9,046	$50.00	Direct	F2, F3

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

Explanation of Responses:

Id	Content
F1	Includes 654 shares acquired under the Vicor Corporation 2017 Employee Stock Purchase Plan on February 28 2025.
F2	Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on May 2, 2025 and vest over a five year period.
F3	Options expire 2 years from each vesting date.