Vicor (VICR) CEO Vinciarelli sells 50,000 shares under 10b5-1 plan

Rhea-AI Filing Summary

Vicor Corporation Chairman and CEO Patrizio Vinciarelli sold 50,000 shares of VICR common stock in open-market transactions. The sales took place on March 25, 2026 at prices between $181.05 and $186.00 per share, based on weighted-average prices disclosed for each trade.

These transactions were executed under a pre-arranged Rule 10b5-1 trading plan adopted on November 3, 2025. After the sales, Vinciarelli directly holds 8,984,984 shares of common stock and indirectly holds 171,125 shares as trustee of an irrevocable trust established for the benefit of his child.

Insider Trade Summary 10b5-1

Net Seller: 50,000 shares ($9,184,898)

Net Sell 6 txns

Insider VINCIARELLI PATRIZIO

Role Chairman and CEO

Sold 50,000 shs ($9.18M)

Type	Security	Shares	Price	Value
Sale	Common Stock	7,350	$181.5698	$1.33M
Sale	Common Stock	8,411	$182.4761	$1.53M
Sale	Common Stock	18,960	$183.7373	$3.48M
Sale	Common Stock	10,000	$185.00	$1.85M
Sale	Common Stock	5,279	$186.00	$982K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 9,027,634 shares (Direct); Common Stock — 171,125 shares (Indirect, See Footnote)

Footnotes (1)

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. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 3, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $181.0500 to $182.0400. 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 (7) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.0500 to $183.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.0900 to $184.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.0000 to $185.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.0000 to $186.0000.

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).

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/25/2026

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								171,125	I	See Footnote(1)
Common Stock	03/25/2026		S(2)		7,350	D	$181.5698(3)	9,027,634	D
Common Stock	03/25/2026		S(2)		8,411	D	$182.4761(4)	9,019,223	D
Common Stock	03/25/2026		S(2)		18,960	D	$183.7373(5)	9,000,263	D
Common Stock	03/25/2026		S(2)		10,000	D	$185(6)	8,990,263	D
Common Stock	03/25/2026		S(2)		5,279	D	$186(7)	8,984,984	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 $181.0500 to $182.0400. 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 (7) 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 $182.0500 to $183.0000.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.0900 to $184.0000.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.0000 to $185.0000.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.0000 to $186.0000.

	/s/Quentin A. Fendelet Attorney in fact for Patrizio Vinciarelli	03/26/2026
	** 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 did Vicor (VICR) Chairman and CEO Patrizio Vinciarelli report in this Form 4?

He reported selling 50,000 shares of Vicor common stock. The open-market sales occurred on March 25, 2026 at weighted-average prices between about $181.05 and $186.00 per share, and were executed under a pre-arranged Rule 10b5-1 trading plan.

How many Vicor (VICR) shares does Patrizio Vinciarelli still own after the reported sales?

He continues to hold 8,984,984 shares directly. In addition, he indirectly holds 171,125 shares as trustee of an irrevocable trust established for the benefit of his child, according to the ownership and footnote disclosures in the filing.

At what prices did the Vicor (VICR) CEO sell his 50,000 shares?

The shares were sold at weighted-average prices around $181–$186. Footnotes specify price ranges from $181.05 to $186.00 per share across multiple trades, with each Form 4 line item showing a separate weighted-average sale price.

Were the Vicor (VICR) insider sales made under a Rule 10b5-1 trading plan?

Yes, the sales were made under a Rule 10b5-1 plan. A footnote states the transactions were effected pursuant to a pre-arranged trading plan adopted by Patrizio Vinciarelli on November 3, 2025, indicating the sales were scheduled in advance.

Does the Vicor (VICR) Form 4 show any derivative exercises or just stock sales?

The filing shows only common stock sales, no derivative exercises. All reported transactions are non-derivative common stock with code "S" for open-market or private sales, and the derivative position summary indicates zero option or other derivative exercises.

What indirect Vicor (VICR) holdings are disclosed for Patrizio Vinciarelli?

He is shown with 171,125 shares held indirectly through a trust. A footnote explains these shares are held by him as trustee of the Patrizio Vinciarelli Irrevocable Trust dated December 21, 2012, formed for the benefit of his child.