Vicor (NASDAQ: VICR) director reports option exercises and stock sales

Rhea-AI Filing Summary

Vicor Corp insider Michael McNamara, a director and officer serving as General Manager Mfg. Ops, reported option-related transactions in the company’s common stock dated 12/11/2025.

He exercised non-qualified stock options to acquire 2,626 shares at $69.04 and 1,611 shares at $31.05, and on the same date sold 2,626 shares at $101.1988 and 1,611 shares at $101.2805.

Following these trades, he beneficially owned 18,138 shares of Vicor common stock directly and held 10,000 non-qualified stock options exercisable at $69.04, which expire on 06/24/2030.

Insider Trade Summary

Exercise and Sale: 4,237 shares ($198K approx. pre-tax spread)

Exercise and Sale 6 txns

Insider McNamara Michael

Role General Manager Mfg. Ops

Sold 4,237 shs ($429K)

Approx. gross sale proceeds $429K

Approx. exercise cost $231K

Approx. pre-tax spread $198K

Type	Security	Shares	Price	Value
Exercise	Non Qualified Stock Option	2,626	$0.00	$0.00
Exercise	Non Qualified Stock Option	1,611	$0.00	$0.00
Exercise	Common Stock	2,626	$69.04	$181K
Sale	Common Stock	2,626	$101.1988	$266K
Exercise	Common Stock	1,611	$31.05	$50K
Sale	Common Stock	1,611	$101.2805	$163K

Holdings After Transaction: Non Qualified Stock Option — 10,000 shares (Direct); Common Stock — 18,138 shares (Direct)

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 12/12/2025 - 04:40 PM Learn about SEC filing dates

FAQ

What insider transaction did Michael McNamara report for Vicor Corp (VICR)?

Michael McNamara reported option-related transactions in Vicor Corp common stock, including exercising non-qualified stock options and selling the acquired shares on 12/11/2025.

What roles does Michael McNamara hold at Vicor Corp (VICR)?

He is a director and an officer of Vicor Corp, with the reported title of General Manager Mfg. Ops.

How many Vicor (VICR) shares did Michael McNamara buy and sell on 12/11/2025?

He exercised options to acquire 2,626 shares at $69.04 and 1,611 shares at $31.05, then sold 2,626 shares at $101.1988 and 1,611 shares at $101.2805.

How many Vicor (VICR) shares does Michael McNamara own after the reported transactions?

After the 12/11/2025 transactions, Michael McNamara beneficially owned 18,138 shares of Vicor common stock directly.

What stock options does Michael McNamara hold in Vicor Corp (VICR) after these trades?

He held 10,000 non-qualified stock options with an exercise price of $69.04, exercisable from 06/24/2025 and expiring on 06/24/2030.

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^*

McNamara Michael

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Manager Mfg. Ops

3. Date of Earliest Transaction (Month/Day/Year)
12/11/2025

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	12/11/2025		M		2,626	A	$69.04	20,764	D
Common Stock	12/11/2025		S		2,626	D	$101.1988	18,138	D
Common Stock	12/11/2025		M		1,611	A	$31.05	19,749	D
Common Stock	12/11/2025		S		1,611	D	$101.2805	18,138	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
Non Qualified Stock Option	$69.04	12/11/2025		M			2,626	06/24/2025	06/24/2030	Common Stock	2,626	$0	10,000	D
Non Qualified Stock Option	$31.05	12/11/2025		M			1,611	06/28/2024	06/28/2029	Common Stock	1,611	$0	0	D

Explanation of Responses:

	/s/Kemble D. Morrison Attorney in fact for Michael McNamara	12/12/2025
	** 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.