Vicor CEO Patrizio Vinciarelli sells 20,000 shares

The sales were made under a Rule 10b5-1 trading plan adopted by Patrizio Vinciarelli on February 26, 2026; 167,125 shares were listed in a trust.

Rhea-AI Filing Summary

VICOR CORP (VICR) Chairman & CEO Patrizio Vinciarelli sold 20,000 common shares on October 2, 2026, across seven reported transactions. The sales were made pursuant to a Rule 10b5-1 trading plan adopted on February 26, 2026; the reported prices were weighted averages for each transaction.

The reported holdings also include 167,125 shares held by Vinciarelli as trustee of the Patrizio Vinciarelli Irrevocable Trust, established for the benefit of his child.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares

Net Sell 8 txns

Insider VINCIARELLI PATRIZIO

Role Chairman & CEO

Sold 20,000 shs ($6.20M)

Type	Security	Shares	Price	Value
Sale	Common Stock F2, F3	1,075	$306.9256	$330K
Sale	Common Stock F2, F4	4,961	$308.0112	$1.53M
Sale	Common Stock F2, F5	877	$309.0983	$271K
Sale	Common Stock F2, F6	6,448	$310.322	$2.00M
Sale	Common Stock F2, F7	2,679	$311.424	$834K
Sale	Common Stock F2, F8	2,648	$312.2882	$827K
Sale	Common Stock F2, F9	1,312	$313.3191	$411K
holding	Common Stock F1	--	--	--

Holdings After Transaction: Common Stock — 8,307,390 shares (Direct); Common Stock — 167,125 shares (Indirect, See Footnote)

Footnotes (9)

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 February 26, 2026.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $306.5100 and $307.3600. 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 (9) to this Form 4.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $307.5500 and $308.1800.
5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.7000 and $309.6800.
6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $309.8500 and $310.7000.
7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $310.9000 and $311.8100.
8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $312.0000 and $312.4600.
9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.3000 and $313.5600.

Key Figures

Common shares sold: 20,000 shares Reported weighted-average price: $306.9256 per share Reported weighted-average price: $313.3191 per share +2 more

5 metrics

Common shares sold 20,000 shares Reported across seven transactions on October 2, 2026

Reported weighted-average price $306.9256 per share 1,075-share sale on October 2, 2026

Reported weighted-average price $313.3191 per share 1,312-share sale on October 2, 2026

Shares held in trust 167,125 shares Held by Patrizio Vinciarelli as trustee for the benefit of his child

Rule 10b5-1 plan adoption date February 26, 2026 Plan referenced for the reported sales

Key Terms

Rule 10b5-1 trading plan, weighted average price, Irrevocable Trust

3 terms

Rule 10b5-1 trading plan regulatory

"Rule 10b5-1 trading plan adopted by the reporting person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Irrevocable Trust technical

"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.

FAQ

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

How many VICR shares did Chairman & CEO Patrizio Vinciarelli sell?

Patrizio Vinciarelli reported selling 20,000 common shares on October 2, 2026, across seven transactions. The sales were made pursuant to a Rule 10b5-1 trading plan adopted on February 26, 2026.

What were the reported prices for Patrizio Vinciarelli's VICR share sales?

The reported weighted-average prices were $306.9256 per share for 1,075 shares, $308.0112 for 4,961 shares, $309.0983 for 877 shares, $310.3220 for 6,448 shares, $311.4240 for 2,679 shares, $312.2882 for 2,648 shares, and $313.3191 for 1,312 shares.

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

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Available on EDGAR 10/05/2026 - 03:46 PM Accepted by SEC EDGAR 10/05/2026 - 03:45 PM 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).

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)

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 & CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/02/2026

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								167,125	I	See Footnote(1)
Common Stock	10/02/2026	10/02/2026	S(2)		1,075	D	$306.9256(3)	8,326,315	D
Common Stock	10/02/2026	10/02/2026	S(2)		4,961	D	$308.0112(4)	8,321,354	D
Common Stock	10/02/2026	10/02/2026	S(2)		877	D	$309.0983(5)	8,320,477	D
Common Stock	10/02/2026	10/02/2026	S(2)		6,448	D	$310.322(6)	8,314,029	D
Common Stock	10/02/2026	10/02/2026	S(2)		2,679	D	$311.424(7)	8,311,350	D
Common Stock	10/02/2026	10/02/2026	S(2)		2,648	D	$312.2882(8)	8,308,702	D
Common Stock	10/02/2026	10/02/2026	S(2)		1,312	D	$313.3191(9)	8,307,390	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 February 26, 2026.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $306.5100 and $307.3600. 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 (9) 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 $307.5500 and $308.1800.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.7000 and $309.6800.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $309.8500 and $310.7000.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $310.9000 and $311.8100.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $312.0000 and $312.4600.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.3000 and $313.5600.

	/s/Quentin A. Fendelet Attorney in Fact for Patrizio Vinciarelli	10/05/2026
	** 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)