Vicor (VICR) CEO sells 50,000 shares under Rule 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 6, 2026. The transactions were executed in multiple trades at prices reported between $159.56 and $177.62 per share.

The filing states these sales were made under a Rule 10b5‑1 trading plan adopted on November 3, 2025, indicating they were pre‑scheduled. After the sales, Vinciarelli holds 9,558,163 shares directly and an additional 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
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)
03/06/2026

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	03/06/2026		S(2)		1,400	D	$160.174(3)	9,606,763	D
Common Stock	03/06/2026		S(2)		3,400	D	$161.1065(4)	9,603,363	D
Common Stock	03/06/2026		S(2)		9,500	D	$162.3625(5)	9,593,863	D
Common Stock	03/06/2026		S(2)		6,726	D	$163.3134(6)	9,587,137	D
Common Stock	03/06/2026		S(2)		4,338	D	$164.2485(7)	9,582,799	D
Common Stock	03/06/2026		S(2)		7,032	D	$165.2179(8)	9,575,767	D
Common Stock	03/06/2026		S(2)		3,580	D	$166.1736(9)	9,572,187	D
Common Stock	03/06/2026		S(2)		924	D	$167.1696(10)	9,571,263	D
Common Stock	03/06/2026		S(2)		1,299	D	$168.1657(11)	9,569,964	D
Common Stock	03/06/2026		S(2)		501	D	$168.8133(12)	9,569,463	D
Common Stock	03/06/2026		S(2)		1,498	D	$171.451(13)	9,567,965	D
Common Stock	03/06/2026		S(2)		542	D	$172.69(14)	9,567,423	D
Common Stock	03/06/2026		S(2)		1,315	D	$173.9134(15)	9,566,108	D
Common Stock	03/06/2026		S(2)		3,145	D	$174.6583(16)	9,562,963	D
Common Stock	03/06/2026		S(2)		1,700	D	$175.4927(17)	9,561,263	D
Common Stock	03/06/2026		S(2)		2,400	D	$176.7429(18)	9,558,863	D
Common Stock	03/06/2026		S(2)		700	D	$177.4714(19)	9,558,163	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 $159.5600 to $160.5200. 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 (19) 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 $160.5700 to $161.5200.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $161.7200 to $162.7100.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $162.7400 to $163.7300.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $163.7400 to $164.7300.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $164.7400 to $165.7300.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $165.7400 to $166.7300.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $166.7400 to $167.5000.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $167.7400 to $168.6100.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $168.7600 to $168.9700.

13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $171.1200 to $172.1000.

14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $172.1200 to $173.0200.

15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $173.1200 to $174.1000.

16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $174.1500 to $175.1300.

17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $175.2300 to $176.1200.

18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $176.3200 to $177.1600.

19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.4300 to $177.6200.

	/s/Quentin A. Fendelet. Attorney in fact for Patrizio Vinciarelli	03/10/2026
	** 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 transaction did Vicor (VICR) report for CEO Patrizio Vinciarelli?

Vicor reported that CEO Patrizio Vinciarelli sold 50,000 shares of common stock in open‑market transactions on March 6, 2026. The trades were executed in multiple blocks at various prices and disclosed in a Form 4 insider filing with the SEC.

How many Vicor (VICR) shares did the CEO sell and at what prices?

The CEO sold a total of 50,000 Vicor common shares on March 6, 2026. The Form 4 shows weighted‑average prices for each block, with underlying trade prices ranging from $159.56 to $177.62 per share across the different sale groupings reported in the footnotes.

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

After the March 6, 2026 sales, Vinciarelli directly owns 9,558,163 Vicor common shares. The Form 4 also reports 171,125 additional shares held indirectly, where he serves as trustee of an irrevocable trust established for the benefit of his child.

Was the Vicor (VICR) CEO share sale made under a Rule 10b5-1 trading plan?

Yes. A footnote explains the sale was effected pursuant to a Rule 10b5‑1 trading plan adopted by Vinciarelli on November 3, 2025. Such plans allow insiders to pre‑schedule trades, helping separate personal trading decisions from day‑to‑day market developments.

What indirect Vicor (VICR) holdings does the CEO report in this Form 4?

The filing shows 171,125 Vicor shares held indirectly by Vinciarelli as trustee of the Patrizio Vinciarelli Irrevocable Trust dated December 21, 2012. This trust was established for the benefit of his child, and these holdings are reported as indirect beneficial ownership.

What do the price ranges in the Vicor (VICR) Form 4 footnotes mean?

Each line’s reported price is a weighted average, with footnotes stating the underlying trades occurred within specific ranges, such as $159.56–$160.52 and up to $177.43–$177.62. The CEO undertakes to provide detailed trade‑by‑trade pricing information upon request.