Vicor (VICR) executive exercises options, sells 7,174 shares at $190

Rhea-AI Filing Summary

Vicor Corp executive Michael McNamara exercised stock options and immediately sold the resulting shares. He exercised options to acquire a total of 7,174 shares of common stock at exercise prices of $60.61 and $41.61 per share, then sold 7,174 shares in open-market transactions at $190.0699 per share. After these transactions, he directly owned 18,138 shares of Vicor common stock.

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

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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)

VICOR CORPORATION

25 FRONTAGE RD.

(Street)

ANDOVER MASSACHUSETTS 01810

(City) (State) (Zip)

UNITED STATES

(Country)

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.

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/17/2026

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

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

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

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	03/17/2026		M		1,668	A	$60.61	19,806	D
Common Stock	03/17/2026		S		1,668	D	$190.0699	18,138	D
Common Stock	03/17/2026		M		5,506	A	$41.61	23,644	D
Common Stock	03/17/2026		S		5,506	D	$190.0699	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	$60.61	03/17/2026		M			1,668	04/25/2025	04/25/2029	Common Stock	1,668	$0	1,666	D
Non Qualified Stock Option	$41.61	03/17/2026		M			5,506	05/02/2025	05/02/2030	Common Stock	5,506	$0	8,257	D

Explanation of Responses:

	/s/Kemble D. Morrison. Attorney in fact for Michael McNamara	03/18/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

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

Vicor reported that executive and director Michael McNamara exercised stock options and sold the resulting shares. He exercised options for 7,174 shares of common stock and then sold 7,174 shares in open-market transactions on March 17, 2026.

How many Vicor (VICR) shares did Michael McNamara sell in this Form 4?

Michael McNamara sold 7,174 shares of Vicor common stock. The sales occurred in two transactions of 1,668 and 5,506 shares, each at a price of $190.0699 per share, following the exercise of corresponding stock options.

What stock options did Michael McNamara exercise at Vicor (VICR)?

He exercised non-qualified stock options covering 1,668 shares at an exercise price of $60.61 per share and 5,506 shares at $41.61 per share. These option exercises converted derivative positions into common stock before the related share sales.

What is Michael McNamara’s Vicor (VICR) share ownership after these transactions?

After the reported transactions, Michael McNamara directly owned 18,138 shares of Vicor common stock. This figure reflects his holdings following both the option exercises and subsequent open-market sales executed on March 17, 2026.

Were Michael McNamara’s Vicor (VICR) transactions open-market sales?

Yes. The Form 4 identifies two transactions in Vicor common stock with code S, described as “Sale in open market or private transaction.” These involved selling 1,668 and 5,506 shares at a price of $190.0699 per share.

Did Michael McNamara retain any Vicor (VICR) options after these exercises?

The filing shows two option exercises totaling 7,174 shares and indicates no remaining derivative positions in the summarized data. The derivative section is empty, suggesting those reported options were fully exercised in these transactions.