What is the nature of the indirect VICR share ownership reported by the CEO?

The filing explains that 167,125 shares are held indirectly by Patrizio Vinciarelli as trustee of the Patrizio Vinciarelli Irrevocable Trust dated December 21, 2012. The trust was established for the benefit of his child, indicating these shares are held in a fiduciary capacity.

Vicor Corp (VICR) CEO sells 20,000 shares in pre-set 10b5-1 trades

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

Vicor Corp Chairman and CEO Patrizio Vinciarelli reported open-market sales of 20,000 shares of common stock on June 2, 2026 under a pre-arranged Rule 10b5-1 trading plan adopted on February 26, 2026. Sale prices were reported as weighted averages from about $316.63 to $334.59 per share. Following these transactions, he holds 8,787,590 shares directly and 167,125 shares indirectly as trustee of an irrevocable trust.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares ($6,541,526)

Net Sell 17 txns

Insider VINCIARELLI PATRIZIO

Role Chairman and CEO

Sold 20,000 shs ($6.54M)

Type	Security	Shares	Price	Value
Sale	Common Stock	500	$316.9557	$158K
Sale	Common Stock	1,200	$318.473	$382K
Sale	Common Stock	1,000	$320.1789	$320K
Sale	Common Stock	1,050	$321.2444	$337K
Sale	Common Stock	1,450	$322.4707	$468K
Sale	Common Stock	808	$323.4388	$261K
Sale	Common Stock	897	$324.7237	$291K
Sale	Common Stock	1,336	$325.4353	$435K
Sale	Common Stock	1,661	$326.6634	$543K
Sale	Common Stock	600	$327.8393	$197K
Sale	Common Stock	1,171	$328.9702	$385K
Sale	Common Stock	995	$329.6283	$328K
Sale	Common Stock	1,534	$330.7832	$507K
Sale	Common Stock	3,700	$332.0834	$1.23M
Sale	Common Stock	1,098	$333.0437	$366K
Sale	Common Stock	1,000	$334.108	$334K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 8,787,590 shares (Direct, null); Common Stock — 167,125 shares (Indirect, See footnote)

Footnotes (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. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $316.6300 to $317.0200. 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 (18) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $318.1100 to $319.0900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.5100 to $320.5000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.8800 to $321.7400. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $321.9600 to $322.9200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $322.9600 to $323.9200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $323.9600 to $324.9200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.9600 to $325.9100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.0900 to $327.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.1800 to $328.1500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.2200 to $329.2100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.2200 to $330.1900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $330.2900 to $331.2300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.5000 to $332.4900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.5200 to $333.4200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.8700 to $334.5900.

Key Figures

Shares sold: 20,000 shares Sale price range: $316.63–$334.59 per share Direct holdings after sale: 8,787,590 shares +3 more

6 metrics

Shares sold 20,000 shares Total common stock sold on June 2, 2026

Sale price range $316.63–$334.59 per share Weighted-average price ranges across reported trades

Direct holdings after sale 8,787,590 shares Common stock directly owned after June 2, 2026 transactions

Indirect trust holdings 167,125 shares Held as trustee of irrevocable trust for reporting person’s child

10b5-1 plan adoption date February 26, 2026 Date CEO adopted the Rule 10b5-1 trading plan

Number of sale transactions 16 transactions Non-derivative open-market sale entries on June 2, 2026

Key Terms

Rule 10b5-1 trading plan, weighted average price, irrevocable trust, open-market sale, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026."

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 financial

"These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012"

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.

open-market sale financial

"transaction_action": "open-market sale""

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 ownership financial

""ownership_type": "indirect""

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Form 4 Insider Transactions: What Each Field Means →

06/03/2026 - 11:31 AM

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)
06/02/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock								167,125	I	See footnote⁽¹⁾
Common Stock	06/02/2026		S⁽²⁾		500	D	$316.9557⁽³⁾	8,787,590	D
Common Stock	06/02/2026		S⁽²⁾		1,200	D	$318.473⁽⁴⁾	8,786,390	D
Common Stock	06/02/2026		S⁽²⁾		1,000	D	$320.1789⁽⁵⁾	8,785,390	D
Common Stock	06/02/2026		S⁽²⁾		1,050	D	$321.2444⁽⁶⁾	8,784,340	D
Common Stock	06/02/2026		S⁽²⁾		1,450	D	$322.4707⁽⁷⁾	8,782,890	D
Common Stock	06/02/2026		S⁽²⁾		808	D	$323.4388⁽⁸⁾	8,782,082	D
Common Stock	06/02/2026		S⁽²⁾		897	D	$324.7237⁽⁹⁾	8,781,185	D
Common Stock	06/02/2026		S⁽²⁾		1,336	D	$325.4353⁽¹⁰⁾	8,779,849	D
Common Stock	06/02/2026		S⁽²⁾		1,661	D	$326.6634⁽¹¹⁾	8,778,188	D
Common Stock	06/02/2026		S⁽²⁾		600	D	$327.8393⁽¹²⁾	8,777,588	D
Common Stock	06/02/2026		S⁽²⁾		1,171	D	$328.9702⁽¹³⁾	8,776,417	D
Common Stock	06/02/2026		S⁽²⁾		995	D	$329.6283⁽¹⁴⁾	8,775,422	D
Common Stock	06/02/2026		S⁽²⁾		1,534	D	$330.7832⁽¹⁵⁾	8,773,888	D
Common Stock	06/02/2026		S⁽²⁾		3,700	D	$332.0834⁽¹⁶⁾	8,770,188	D
Common Stock	06/02/2026		S⁽²⁾		1,098	D	$333.0437⁽¹⁷⁾	8,769,090	D
Common Stock	06/02/2026		S⁽²⁾		1,000	D	$334.108⁽¹⁸⁾	8,768,090	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 $316.6300 to $317.0200. 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 (18) 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 $318.1100 to $319.0900.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.5100 to $320.5000.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.8800 to $321.7400.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $321.9600 to $322.9200.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $322.9600 to $323.9200.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $323.9600 to $324.9200.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.9600 to $325.9100.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.0900 to $327.0000.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.1800 to $328.1500.

13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.2200 to $329.2100.

14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.2200 to $330.1900.

15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $330.2900 to $331.2300.

16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.5000 to $332.4900.

17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.5200 to $333.4200.

18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.8700 to $334.5900.

	/s/Quentin A. Fendelet Attorney in Fact for Patrizio Vinciarelli	06/03/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did VICR CEO Patrizio Vinciarelli report?

Patrizio Vinciarelli reported selling 20,000 shares of Vicor common stock in open-market transactions. The trades occurred on June 2, 2026, and were disclosed as multiple sales at weighted average prices between about $316.63 and $334.59 per share.

Were the June 2, 2026 VICR insider sales made under a 10b5-1 plan?

Yes. The filing states the sales were effected under a Rule 10b5-1 trading plan adopted on February 26, 2026. Such plans pre-schedule trades, indicating these transactions were arranged in advance rather than timed discretionarily around short-term news.

How many VICR shares does the CEO hold after the reported sales?

After the reported June 2, 2026 sales, Patrizio Vinciarelli holds 8,787,590 Vicor common shares directly. He also has indirect ownership of 167,125 additional shares as trustee of an irrevocable trust established for the benefit of his child.

At what prices did the VICR CEO sell his shares on June 2, 2026?

The reported prices are weighted averages for multiple trades in each sale block. Footnotes show sale price ranges from $316.63 to $334.59 per share across the various transactions, reflecting execution over a band of prices during the trading session.