VICOR (VICR) CAO exercises options, then sells 2,000 common shares

Rhea-AI Filing Summary

VICOR CORP corporate vice president and chief accounting officer Quentin A. Fendelet reported option and share transactions in a Form 4. On February 23, 2026, he exercised a non-qualified stock option for 2,000 shares, resulting in the acquisition of 2,000 shares of common stock at a price of $48.38 per share. On the same date, he then completed an open-market sale of 2,000 shares of common stock at a price of $177.72 per share. After these transactions, his directly held common stock position reported in this filing was 0 shares.

Insider Trade Summary

Net Seller: 2,000 shares ($355,440)

Net Sell 3 txns

Insider Fendelet Quentin A.

Role Corp. VP - CAO

Sold 2,000 shs ($355K)

Type	Security	Shares	Price	Value
Exercise	Non Qualified Stock Option	2,000	$0.00	--
Exercise	Common Stock	2,000	$48.38	$97K
Sale	Common Stock	2,000	$177.72	$355K

Holdings After Transaction: Non Qualified Stock Option — 0 shares (Direct); Common Stock — 2,000 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

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^*

Fendelet Quentin A.

(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. VP - CAO

3. Date of Earliest Transaction (Month/Day/Year)
02/23/2026

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	02/23/2026		M		2,000	A	$48.38	2,000	D
Common Stock	02/23/2026		S		2,000	D	$177.72	0	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	$48.38	02/23/2026		M			2,000	01/16/2026	01/16/2028	Common Stock	2,000	$0	0	D

Explanation of Responses:

	/s/Quentin A. Fendelet	02/24/2026
	** 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.

FAQ

What insider transactions did VICOR (VICR) report for Quentin A. Fendelet?

Quentin A. Fendelet reported exercising a non-qualified stock option for 2,000 shares and acquiring 2,000 shares of VICOR common stock, then selling 2,000 shares in an open-market transaction, all on February 23, 2026.

How many VICOR (VICR) shares did Quentin A. Fendelet sell in this Form 4?

He sold 2,000 shares of VICOR common stock. The transaction was coded as an open-market or private sale, with a reported sale price of $177.72 per share on February 23, 2026.

At what price did Quentin A. Fendelet acquire VICOR (VICR) shares through option exercise?

He acquired 2,000 VICOR common shares at a reported price of $48.38 per share. This acquisition occurred via exercise or conversion of a non-qualified stock option on February 23, 2026.

What was Quentin A. Fendelet’s reported VICOR (VICR) shareholding after these transactions?

Following the reported option exercise, share acquisition, and subsequent sale, the Form 4 shows that Quentin A. Fendelet directly held 0 shares of VICOR common stock at the end of the day on February 23, 2026.

What do the transaction codes M and S mean in this VICOR (VICR) Form 4?

Code M indicates an exercise or conversion of a derivative security, here a non-qualified stock option for 2,000 shares. Code S indicates a sale, in this case an open-market or private sale of 2,000 VICOR common shares.