Vicor CEO discloses stock sales under Rule 10b5-1 plan

Vicor Corporation insider Patrizio Vinciarelli, the company’s chairman, CEO and 10% owner, reported open-market sales of common stock executed under a Rule 10b5-1 trading plan adopted on December 10, 2024.

Accepted by SEC EDGAR 12/12/2025 - 03:12 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Vicor Corporation insider Patrizio Vinciarelli, the company’s chairman, CEO and 10% owner, reported open-market sales of common stock executed under a Rule 10b5-1 trading plan adopted on December 10, 2024. On 11/12/2025, he sold 10,000 shares at $100.1818 per share, followed by 5,724 shares at $101.1026 on 12/10/2025, and two sales on 12/11/2025 of 4,276 and 1,900 shares at $101.6477 and $102.0802 per share, respectively.

After these transactions, he beneficially owned 9,828,363 shares of Vicor common stock directly, and 171,125 shares indirectly as trustee of an irrevocable trust established for the benefit of his child.

Insider Trade Summary

Net Seller: 21,900 shares

Net Sell 4 txns

Insider VINCIARELLI PATRIZIO

Role Chairman and CEO

Sold 21,900 shs ($2.21M)

Share of Position Sold 0.22%

Type	Security	Shares	Price	Value
Sale	Common Stock	4,276	$101.6477	$435K
Sale	Common Stock	1,900	$102.0802	$194K
Sale	Common Stock	5,724	$101.1026	$579K
Sale	Common Stock	10,000	$100.1818	$1.00M
Holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 9,828,363 shares (Direct); Common Stock — 171,125 shares (Indirect, See footnote)

Holdings Before and After: Common Stock, 9,850,263 to 9,828,363 shares (Direct)

Other Insiders: 5 other insiders reported open-market sales of this stock in the 30 days up to this filing.

Footnotes (2)

1. F1. 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. F2. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 10, 2024.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did VICR report in this Form 4?

The filing reports that Patrizio Vinciarelli, Vicor’s chairman, CEO and 10% owner, sold shares of Vicor common stock in several open-market transactions under a Rule 10b5-1 trading plan.

How many Vicor (VICR) shares did the CEO sell and on which dates?

He sold 10,000 shares on 11/12/2025, 5,724 shares on 12/10/2025, and on 12/11/2025 he sold 4,276 shares and 1,900 shares of Vicor common stock.

At what prices were the Vicor (VICR) shares sold by the CEO?

The reported sales were at per-share prices of $100.1818 on 11/12/2025, $101.1026 on 12/10/2025, and $101.6477 and $102.0802 for the two transactions on 12/11/2025.

How many Vicor (VICR) shares does the CEO own after these transactions?

Following the reported sales, Patrizio Vinciarelli beneficially owned 9,828,363 shares of Vicor common stock directly.

Does the Vicor (VICR) CEO hold any shares indirectly?

Yes. He also beneficially owned 171,125 shares held as trustee of the Patrizio Vinciarelli Irrevocable Trust U/A dated 12/21/2012, established for the benefit of his child.

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

Yes. The filing states that the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 10, 2024.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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)
11/12/2025

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	11/12/2025		S(2)		10,000	D	$100.1818	9,840,263	D
Common Stock	12/10/2025		S(2)		5,724	D	$101.1026	9,834,539	D
Common Stock	12/11/2025		S(2)		4,276	D	$101.6477	9,830,263	D
Common Stock	12/11/2025		S(2)		1,900	D	$102.0802	9,828,363	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 December 10, 2024.

	/s/Kemble D. Morrison Attorney in fact for Patrizio Vinciarelli	12/12/2025
	** 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.