Vicor Corp (VICR) officer reports sale of 3,844 common shares on December 15, 2025

Rhea-AI Filing Summary

Vicor Corp officer Alex Gusinov reported a sale of company stock. On 12/15/2025, he sold 3,844 shares of Vicor Corp common stock at a price of $97.3114 per share, coded as a sale transaction on Form 4.

Following this transaction, he directly beneficially owns 10,340 shares of Vicor Corp common stock, according to the filing.

Insider Trade Summary

Net Seller: 3,844 shares

Net Sell 1 txn

Insider Gusinov Alex

Role Corp. Vice President Eng.

Sold 3,844 shs ($374K)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,844	$97.3114	$374K

Holdings After Transaction: Common Stock — 10,340 shares (Direct)

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 12/17/2025 - 10:45 AM Learn about SEC filing dates

FAQ

What insider transaction did Vicor Corp (VICR) report in this Form 4?

The filing reports that officer Alex Gusinov sold 3,844 shares of Vicor Corp common stock on 12/15/2025 at a price of $97.3114 per share.

Who is the reporting person in the Vicor Corp (VICR) Form 4 and what is their role?

The reporting person is Alex Gusinov, who is identified as an officer of Vicor Corp with the title Corp. Vice President Eng.

How many Vicor Corp (VICR) shares does the insider own after the reported sale?

After the reported sale, Alex Gusinov beneficially owns 10,340 shares of Vicor Corp common stock, held in direct ownership form.

Was the Vicor Corp (VICR) Form 4 transaction a purchase or a sale?

The Form 4 shows a transaction code S, indicating a sale of Vicor Corp common stock rather than a purchase.

On what date did the Vicor Corp (VICR) insider transaction occur?

The earliest transaction date reported in the Form 4 is 12/15/2025, which is when the sale of 3,844 common shares took place.

Does the Vicor Corp (VICR) Form 4 report any derivative securities?

The provided excerpt includes a table for derivative securities, but no derivative transactions or holdings are filled in for this report.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Gusinov Alex

(Last) (First) (Middle)

25 FRONTAGE RD.

(Street)

ANDOVER MA 01810

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
VICOR CORP [ vicr ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Corp. Vice President Eng.

3. Date of Earliest Transaction (Month/Day/Year)
12/15/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/15/2025		S		3,844	D	$97.3114	10,340	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/Kemble D. Morrison Attorney in fact for Alex Gusinov	12/17/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.