Vicor (VICR) CEO sells 50,000 shares in pre-planned trades

Rhea-AI Filing Summary

Vicor Corporation Chairman and CEO Patrizio Vinciarelli reported open-market sales of 50,000 shares of Common Stock on March 11, 2026. The trades were executed under a Rule 10b5-1 trading plan adopted on November 3, 2025, at weighted-average prices ranging from $167.75 to $180.54 per share.

After these sales, he held 9,408,163 shares directly and 171,125 shares indirectly as trustee of an irrevocable trust for his child.

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
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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).

X

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^*

VINCIARELLI PATRIZIO

(Last) (First) (Middle)

C/O VICOR CORPORATION

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	X	10% Owner
X	Officer (give title below)		Other (specify below)
	Chairman and CEO

3. Date of Earliest Transaction (Month/Day/Year)
03/11/2026

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								171,125	I	See Footnote(1)
Common Stock	03/11/2026		S(2)		200	D	$168.1244(3)	9,457,963	D
Common Stock	03/11/2026		S(2)		1,408	D	$169.3829(4)	9,456,555	D
Common Stock	03/11/2026		S(2)		292	D	$170.3132(5)	9,456,263	D
Common Stock	03/11/2026		S(2)		300	D	$171.2567(6)	9,455,963	D
Common Stock	03/11/2026		S(2)		1,540	D	$173.0098(7)	9,454,423	D
Common Stock	03/11/2026		S(2)		1,160	D	$174.3222(8)	9,453,263	D
Common Stock	03/11/2026		S(2)		4,007	D	$176.1746(9)	9,449,256	D
Common Stock	03/11/2026		S(2)		10,063	D	$177.2819(10)	9,439,193	D
Common Stock	03/11/2026		S(2)		18,734	D	$178.1211(11)	9,420,459	D
Common Stock	03/11/2026		S(2)		11,185	D	$178.9496(12)	9,409,274	D
Common Stock	03/11/2026		S(2)		1,111	D	$180.171(13)	9,408,163	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:

1. These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person.

2. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 3, 2025.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $167.7500 to $168.7100. The reporting person undertakes to provide to Vicor Corporation, any security holder of Vicor Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) through (13) to this Form 4.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $168.7900 to $169.7300.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $170.0000 to $170.6200.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $171.0500 to $171.6700.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $172.8300 to $173.7500.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $174.0000 to $174.5000.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $175.6700 to $176.6200.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $176.6700 to $177.6600.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.6700 to $178.6600.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $178.6700 to $179.6200.

13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $179.6700 to $180.5400.

	/s/Kemble D. Morrison. Attorney in fact for Patrizio Vinciarelli	03/12/2026
	** 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.
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FAQ

What insider transaction did Vicor (VICR) report for Patrizio Vinciarelli?

Vicor reported that Chairman and CEO Patrizio Vinciarelli sold 50,000 shares of Common Stock in open-market transactions. The trades occurred on March 11, 2026 at weighted-average prices between $167.75 and $180.54 per share.

Was the Vicor (VICR) CEO’s March 2026 share sale pre-planned?

Yes. The filing states the sale was carried out under a Rule 10b5-1 trading plan adopted by Patrizio Vinciarelli on November 3, 2025. Such plans schedule trades in advance, reducing the significance of trade timing.

How many Vicor (VICR) shares does Patrizio Vinciarelli hold after the sale?

Following the reported transactions, Patrizio Vinciarelli directly held 9,408,163 shares of Vicor Common Stock. He also indirectly held 171,125 shares as trustee of an irrevocable trust established for the benefit of his child.

At what prices did the Vicor (VICR) CEO sell his shares on March 11, 2026?

The filing reports weighted-average sale prices ranging from $167.75 to $180.54 per share. Individual transactions within each block occurred at multiple prices inside narrower ranges disclosed in the accompanying footnotes.

How many separate sale transactions did the Vicor (VICR) Form 4 disclose?

The Form 4 lists 11 separate open-market sale entries of Vicor Common Stock on March 11, 2026, totaling 50,000 shares sold. Each entry reflects a weighted-average price for multiple underlying trades.