Vicor CEO-linked trust sells 4,000 shares

Vicor Corp Chairman and CEO Patrizio Vinciarelli, a more than 10% owner, reported an indirect open-market sale of 4,000 shares of Vicor common stock on April 24, 2026 at an average price of $273.0858 per share.

Rhea-AI Filing Summary

Vicor Corp Chairman and CEO Patrizio Vinciarelli, a more than 10% owner, reported an indirect open-market sale of 4,000 shares of Vicor common stock on April 24, 2026 at an average price of $273.0858 per share.

The shares were sold from an irrevocable trust established for his child, where he serves as trustee. After this transaction, the trust holds 167,125 shares of Vicor common stock indirectly, while a separate entry shows 8,855,090 shares held directly by Vinciarelli as of the same date.

Insider Trade Summary

Net Seller: 4,000 shares

Net Sell 2 txns

Insider VINCIARELLI PATRIZIO

Role Chairman and CEO

Sold 4,000 shs ($1.09M)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,000	$273.0858	$1.09M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 167,125 shares (Indirect, See footnote); Common Stock — 8,855,090 shares (Direct)

Footnotes (1)

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.

Key Figures

Shares sold: 4,000 shares Sale price: $273.0858 per share Trust holdings after sale: 167,125 shares +2 more

5 metrics

Shares sold 4,000 shares Open-market sale of common stock on April 24, 2026

Sale price $273.0858 per share Average price for 4,000-share open-market sale

Trust holdings after sale 167,125 shares Indirect ownership via irrevocable trust after transaction

Direct holdings 8,855,090 shares Common stock held directly by Patrizio Vinciarelli as of April 24, 2026

Net share activity -4,000 shares Net buy/sell shares across all reported transactions

Key Terms

open-market sale, indirect, irrevocable trust, non-derivative, +1 more

5 terms

open-market sale financial

"transaction_action is described as an open-market sale of common stock"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

indirect financial

"The 4,000-share sale is reported under indirect ownership through a trust"

irrevocable trust financial

"These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust"

An irrevocable trust is a legal arrangement where an owner transfers assets into a separate entity managed by a trustee and gives up the power to modify or reclaim those assets. For investors it matters because putting stock or other holdings into such a trust can change who controls and benefits from the assets, affect taxes and creditor protection, and influence how easy it is to sell or value those holdings—like placing valuables in a locked safe overseen by someone else.

non-derivative financial

"The sale is classified as a non-derivative transaction in common stock"

Form 4 regulatory

"The insider transaction is disclosed in a Form 4 filing"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

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

What insider transaction did VICR report for Patrizio Vinciarelli?

VICR reported that an irrevocable trust associated with Chairman and CEO Patrizio Vinciarelli sold 4,000 shares of Vicor common stock. The sale was an open-market transaction disclosed on Form 4 and reflects activity in the trust he administers as trustee.

How many VICR shares were sold and at what price?

The filing shows an open-market sale of 4,000 shares of Vicor common stock at an average price of $273.0858 per share. This is the only reported buy-or-sell transaction in the document, alongside a separate holding entry without share movement.

Who actually holds the VICR shares involved in this Form 4?

The sold shares are held by an irrevocable trust established for the benefit of Patrizio Vinciarelli’s child, with Vinciarelli serving as trustee. The filing treats these as indirect holdings, distinct from his separate direct ownership position in Vicor common stock.

How many VICR shares does the trust hold after the sale?

After selling 4,000 shares, the irrevocable trust associated with Patrizio Vinciarelli directly holds 167,125 shares of Vicor common stock. This post-transaction balance is explicitly reported in the Form 4 as the total shares beneficially owned indirectly through the trust.

What is Patrizio Vinciarelli’s direct VICR shareholding in this filing?

The filing includes a separate holding entry showing 8,855,090 shares of Vicor common stock held directly by Patrizio Vinciarelli. This line is labeled as a holding, with no corresponding transaction code, indicating no change in that direct position on the reported date.

Is this VICR insider sale part of a derivative or option transaction?

No. The sale is reported as a non-derivative transaction in common stock with code “S,” indicating an open-market or private sale. The derivative section of the Form 4 is empty, and the transaction involves no options or other derivative securities in this filing.

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

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Accepted by SEC EDGAR 04/27/2026 - 03:31 PM EDT Learn about SEC filing dates

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).

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 MASSACHUSETTS 01810

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/24/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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								8,855,090	D
Common Stock	04/24/2026		S		4,000	D	$273.0858	167,125	I	See footnote(1)

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.

	/s/Quentin A. Fendelet Attorney in Fact for Patrizio Vinciarelli	04/27/2026
	** 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.
* Form 4: SEC 1474 (03-26)