Vicor (VICR) CEO Vinciarelli sells 50,000 shares in planned stock trades

Rhea-AI Filing Summary

Vicor Corp Chairman and CEO Patrizio Vinciarelli reported open-market sales of 50,000 shares of Common Stock on March 16, 2026. The sales were executed at weighted average prices ranging from $178.0600 to $189.9100 per share under a Rule 10b5-1 trading plan adopted on November 3, 2025.

Following these transactions, Vinciarelli directly holds 9,258,163 shares of Vicor common stock, and an additional 171,125 shares are held indirectly in an irrevocable trust for the benefit of his child, where he serves as trustee.

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)
03/16/2026

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	03/16/2026		S(2)		600	D	$178.06(3)	9,307,563	D
Common Stock	03/16/2026		S(2)		400	D	$179.07(4)	9,307,163	D
Common Stock	03/16/2026		S(2)		2,703	D	$182.2074(5)	9,304,460	D
Common Stock	03/16/2026		S(2)		15,020	D	$183.5256(6)	9,289,440	D
Common Stock	03/16/2026		S(2)		8,522	D	$184.4107(7)	9,280,918	D
Common Stock	03/16/2026		S(2)		13,054	D	$185.471(8)	9,267,864	D
Common Stock	03/16/2026		S(2)		7,200	D	$186.4786(9)	9,260,664	D
Common Stock	03/16/2026		S(2)		1,301	D	$187.6253(10)	9,259,363	D
Common Stock	03/16/2026		S(2)		800	D	$188.4825(11)	9,258,563	D
Common Stock	03/16/2026		S(2)		400	D	$189.7525(12)	9,258,163	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 $178.0600 to $178.0600. 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 (12) 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 $179.0700 to $179.0700.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $181.8600 to $182.8500.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.8700 to $183.8600.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.8900 to $184.8800.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.8900 to $185.8800.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.9900 to $186.9600.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.3100 to $188.2500.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.4100 to $188.6800.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.6900 to $189.9100.

	/s/Quentin Fendelet. Attorney in fact for Patrizio Vinciarelli	03/17/2026
	** 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).
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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 in open-market transactions. The trades occurred on March 16, 2026, at weighted average prices between $178.0600 and $189.9100 per share, under a pre-established Rule 10b5-1 trading plan.

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

After the reported sales, he directly owns 9,258,163 shares of Vicor common stock. In addition, 171,125 shares are held indirectly through an irrevocable trust for his child, where he serves as trustee, according to the filing’s ownership details.

What is the significance of the Rule 10b5-1 trading plan mentioned in the Vicor (VICR) Form 4?

The filing states the sales were made under a Rule 10b5-1 trading plan adopted on November 3, 2025. Such plans allow insiders to pre-schedule trades, indicating the timing of these sales was set in advance rather than decided opportunistically.

At what prices did Patrizio Vinciarelli’s Vicor (VICR) share sales occur?

The sales were reported at weighted average prices within specified ranges. According to the footnotes, the trades occurred between $178.0600 and $189.9100 per share, with separate tranches executed at different price ranges during the same trading day.

How many Vicor (VICR) share sale transactions were reported in this Form 4?

The Form 4 lists ten separate non-derivative sale transactions of common stock on March 16, 2026. Together they total 50,000 shares sold, with each line reflecting a distinct share amount and weighted average sale price within specified intraday price ranges.

Does the Vicor (VICR) Form 4 include any derivative or option exercises?

No derivative or option exercises are shown in this Form 4. The transaction data and summary indicate only non-derivative open-market sales of common stock, with derivativeSummary fields empty and exercise-related counts reported as zero in the filing.