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

Rhea-AI Filing Summary

Vicor Corporation’s Chairman and CEO Patrizio Vinciarelli reported open-market sales of 50,000 shares of common stock on March 10, 2026. The shares were sold in multiple transactions at weighted average prices ranging from $169.7000 to $182.4700, pursuant to a Rule 10b5-1 trading plan adopted on November 3, 2025. After these sales, he holds 9,458,163 shares directly and an additional 171,125 shares indirectly as trustee of an irrevocable trust established 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
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 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)
03/10/2026

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	03/10/2026		S(2)		400	D	$169.7(3)	9,507,763	D
Common Stock	03/10/2026		S(2)		959	D	$171.1767(4)	9,506,804	D
Common Stock	03/10/2026		S(2)		1,753	D	$172.547(5)	9,505,051	D
Common Stock	03/10/2026		S(2)		4,388	D	$173.3726(6)	9,500,663	D
Common Stock	03/10/2026		S(2)		7,726	D	$174.9812(7)	9,492,937	D
Common Stock	03/10/2026		S(2)		3,983	D	$175.8761(8)	9,488,954	D
Common Stock	03/10/2026		S(2)		4,792	D	$177.1534(9)	9,484,162	D
Common Stock	03/10/2026		S(2)		8,218	D	$178.1962(10)	9,475,944	D
Common Stock	03/10/2026		S(2)		9,432	D	$179.2098(11)	9,466,512	D
Common Stock	03/10/2026		S(2)		2,676	D	$180.0903(12)	9,463,836	D
Common Stock	03/10/2026		S(2)		4,371	D	$181.2221(13)	9,459,465	D
Common Stock	03/10/2026		S(2)		1,302	D	$182.1746(14)	9,458,163	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 $169.7000 to $169.7000. 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 (14) 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 $171.0400 to $172.0100.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $172.0400 to $172.8800.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $173.0500 to $173.9200.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $174.5000 to $175.4800.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $175.5900 to $176.4900.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $176.6100 to $177.6000.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.6200 to $178.6000.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $178.6300 to $179.6200.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $179.6300 to $180.5600.

13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $180.6500 to $181.6400.

14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $181.7000 to $182.4700.

	/s/Kemble D. Morrison. Attorney in fact for Patrizio Vinciarelli	03/11/2026
	** 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 insider transaction did Vicor (VICR) report for Patrizio Vinciarelli?

Vicor CEO Patrizio Vinciarelli reported selling 50,000 shares of common stock in multiple open-market transactions on March 10, 2026. These sales were executed under a pre-established Rule 10b5-1 trading plan, indicating they were scheduled in advance rather than discretionary.

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

The 50,000 Vicor shares were sold at weighted average prices between $169.7000 and $182.4700. Each reported line reflects a weighted average, with underlying trades occurring across narrower price ranges disclosed in the footnotes to the insider’s report.

How many Vicor (VICR) shares does the CEO hold after the reported sale?

Following the 50,000-share sale, CEO Patrizio Vinciarelli holds 9,458,163 Vicor common shares directly. He also has 171,125 shares indirectly as trustee of an irrevocable trust established for his child, reflecting ongoing substantial ownership in the company.

Was the Vicor (VICR) CEO’s stock sale made under a Rule 10b5-1 plan?

Yes. A footnote states the sale was effected under a Rule 10b5-1 trading plan adopted on November 3, 2025. Such plans allow insiders to pre-schedule trades, reducing the significance of short-term timing for interpreting the transaction.

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

No option exercises or derivative transactions are shown in this Form 4. The filing reports only non-derivative common stock sales totaling 50,000 shares and a separate indirect holding of 171,125 shares in a trust, with no remaining derivative positions listed.

How is the indirect Vicor (VICR) shareholding of the CEO structured?

The filing notes 171,125 Vicor shares are held indirectly by Patrizio Vinciarelli as trustee of the Patrizio Vinciarelli Irrevocable Trust, dated December 21, 2012. The trust is established for the benefit of his child, separating beneficial interest from direct ownership.