Vicor (VICR) director reports option exercise and sale of 1,217 shares

Rhea-AI Filing Summary

Vicor director Zheng John Shen reported option and share transactions. He exercised 1,217 non-qualified stock options on March 4, 2026, acquiring 1,217 shares of common stock at $32.89 per share. He then sold 1,217 common shares at $205.75 per share, leaving 4,864 options and no directly held common shares.

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

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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^*

Shen Zheng John

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

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	03/04/2026		M		1,217	A	$32.89	1,217	D
Common Stock	03/04/2026		S		1,217	D	$205.75	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	$32.89	03/04/2026		M			1,217	06/21/2025	06/21/2034	Common Stock	1,217	$0	4,864	D

Explanation of Responses:

	/s/Quentin A. Fendelet Attorney in fact for Zheng John Shen	03/05/2026
	** 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) director Zheng John Shen report?

Director Zheng John Shen reported exercising 1,217 non-qualified stock options and acquiring 1,217 Vicor common shares, then selling 1,217 common shares. All transactions occurred on March 4, 2026, and were reported as direct ownership transactions in the Form 4 filing.

How many Vicor (VICR) shares did Zheng John Shen sell in this Form 4?

Zheng John Shen sold 1,217 shares of Vicor common stock. The sale was reported as an open-market or private transaction at a reported price of $205.75 per share, and it reduced his directly held common stock position to zero shares after the transaction.

At what prices did Zheng John Shen exercise and sell Vicor (VICR) shares?

He exercised 1,217 non-qualified stock options at a reported price of $0.00 per option, acquiring 1,217 common shares at $32.89 per share. He then sold 1,217 common shares at a reported price of $205.75 per share on March 4, 2026.

What is Zheng John Shen’s Vicor (VICR) ownership after the reported transactions?

After the reported transactions, Zheng John Shen directly holds 4,864 non-qualified stock options and zero shares of Vicor common stock. The Form 4 indicates these positions as direct ownership, with no indirect ownership nature specified in the filing excerpt.

Were Zheng John Shen’s Vicor (VICR) transactions open-market sales or option-related?

The filing shows both. He exercised 1,217 non-qualified stock options, acquiring 1,217 common shares through a derivative exercise. He then executed an open-market or private sale of 1,217 common shares under transaction code “S” on the same date.

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 covering the option exercise and resulting share acquisition. Code “S” indicates a sale in the open market or a private transaction, used for the 1,217 Vicor common shares sold.