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

Rhea-AI Filing Summary

Vicor Corporation Chairman and CEO Patrizio Vinciarelli, a more than ten percent owner, reported open-market sales of 50,000 shares of Vicor common stock on March 5, 2026. The sales were executed in multiple transactions at weighted average prices ranging from about $176.26 to $203.24, as detailed in the price ranges provided.

After these transactions, he directly owned 9,617,851 shares of Vicor common stock and also had 171,125 shares held indirectly as trustee of the Patrizio Vinciarelli Irrevocable Trust established for the benefit of his child. The filing notes that these sales were carried out under a Rule 10b5-1 trading plan adopted on November 3, 2025, which is a pre-arranged program for selling shares over time.

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 ROAD

(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)
03/05/2026

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	03/05/2026		S(2)		1,100	D	$176.8833(3)	9,657,063	D
Common Stock	03/05/2026		S(2)		584	D	$177.738(4)	9,656,479	D
Common Stock	03/05/2026		S(2)		3,850	D	$178.8561(5)	9,652,629	D
Common Stock	03/05/2026		S(2)		10,120	D	$179.8124(6)	9,642,509	D
Common Stock	03/05/2026		S(2)		6,882	D	$180.6974(7)	9,635,627	D
Common Stock	03/05/2026		S(2)		4,764	D	$181.8782(8)	9,630,863	D
Common Stock	03/05/2026		S(2)		266	D	$182.9133(9)	9,630,597	D
Common Stock	03/05/2026		S(2)		353	D	$183.8335(10)	9,630,244	D
Common Stock	03/05/2026		S(2)		981	D	$185.2739(11)	9,629,263	D
Common Stock	03/05/2026		S(2)		1,600	D	$186.7121(12)	9,627,663	D
Common Stock	03/05/2026		S(2)		1,503	D	$188.2279(13)	9,626,160	D
Common Stock	03/05/2026		S(2)		1,997	D	$189.0429(14)	9,624,163	D
Common Stock	03/05/2026		S(2)		400	D	$190.0382(15)	9,623,763	D
Common Stock	03/05/2026		S(2)		1,000	D	$191.2886(16)	9,622,763	D
Common Stock	03/05/2026		S(2)		1,100	D	$192.8087(17)	9,621,663	D
Common Stock	03/05/2026		S(2)		400	D	$193.58(18)	9,621,263	D
Common Stock	03/05/2026		S(2)		1,400	D	$194.9294(19)	9,619,863	D
Common Stock	03/05/2026		S(2)		800	D	$196.3538(20)	9,619,063	D
Common Stock	03/05/2026		S(2)		1,212	D	$197.9741(21)	9,617,851	D
Common Stock	03/05/2026		S(2)		3,888	D	$199.3351(22)	9,613,963	D
Common Stock	03/05/2026		S(2)		1,795	D	$200.0757(23)	9,612,168	D
Common Stock	03/05/2026		S(2)		1,265	D	$201.0502(24)	9,610,903	D
Common Stock	03/05/2026		S(2)		1,640	D	$202.1461(25)	9,609,263	D
Common Stock	03/05/2026		S(2)		1,100	D	$203.0564(26)	9,608,163	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 $176.2600 to $177.2500. 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 (26) 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 $177.2900 to $178.2500

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $178.3000 to $179.2900.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $179.3000 to $180.2900.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $180.3000 to $181.2700

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $181.3400 to $182.2000.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.4900 to $183.3900.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.5200 to $184.5100.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.5800 to $185.5300.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.1700 to $187.1200.

13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.6700 to $188.6500.

14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.6900 to $189.5000.

15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.8000 to $190.6900.

16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $191.0900 to $191.3900

17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $192.2100 to $193.1800

18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $193.2200 to $193.7000.

19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $194.2300 to $195.0000.

20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $196.0000 to $196.4500.

21. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $197.6700 to $198.6400.

22. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $198.7000 to $199.6400.

23. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $199.7100 to $200.6900.

24. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $200.7100 to $201.6600.

25. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $201.7200 to $202.7100.

26. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $202.7600 to $203.2400.

	/s/Quentin A. Fendelet. Attorney in fact for Patrizio Vinciarelli	03/09/2026
	** 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

How many VICR shares did Patrizio Vinciarelli sell in this Form 4 filing?

Patrizio Vinciarelli reported selling 50,000 shares of Vicor (VICR) common stock. These were open-market transactions executed in multiple trades on March 5, 2026, with individual trades reported at various weighted average prices within stated ranges.

At what prices did the VICR CEO sell his Vicor common stock shares?

The CEO’s reported sales occurred at weighted average prices within ranges from about $176.26 to $203.24 per share. Each line item reflects a weighted average, with underlying trades executed across the specific price intervals disclosed in the accompanying footnotes.

How many VICR shares does Patrizio Vinciarelli own after these reported sales?

After the reported transactions, Patrizio Vinciarelli held 9,617,851 shares of Vicor (VICR) common stock directly. He also had 171,125 shares held indirectly as trustee of the Patrizio Vinciarelli Irrevocable Trust established for the benefit of his child.

Were the VICR CEO’s Vicor share sales under a Rule 10b5-1 trading plan?

Yes. A footnote states the sale was effected under a Rule 10b5-1 trading plan. This plan was adopted by Patrizio Vinciarelli on November 3, 2025, allowing pre-arranged, systematic selling of Vicor (VICR) shares regardless of later market conditions.

What does the Form 4 say about Vinciarelli’s indirect holdings of VICR stock?

The Form 4 reports 171,125 shares of Vicor (VICR) common stock held indirectly. A footnote explains these shares are held by Patrizio Vinciarelli as trustee of the Patrizio Vinciarelli Irrevocable Trust, created for the benefit of his child.

What type of transactions did the VICR Form 4 report for the CEO?

The filing lists multiple open-market sales of Vicor (VICR) common stock, coded as “S” for sale. All are non-derivative transactions, meaning they involve actual common shares rather than options or other derivatives, with each batch reported at a separate weighted average price.