Vicor (VICR) CEO Vinciarelli sells 20,000 shares under 10b5-1 plan

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

Patrizio Vinciarelli sold 20,000 shares of Vicor common stock. The sales were reported as 14 separate open-market transactions on June 8, 2026, according to the Form 4 transaction summary.

Q: Was the VICR insider sale by Patrizio Vinciarelli under a 10b5-1 plan?

Yes. The Form 4 states the sale was effected under a Rule 10b5-1 trading plan adopted by Patrizio Vinciarelli on February 26, 2026 , indicating the sale was pre-arranged.

Q: What roles does Patrizio Vinciarelli hold at Vicor Corporation (VICR)?

Patrizio Vinciarelli is identified as Chairman and CEO of Vicor Corporation and also a greater-than-10% owner. These capacities are disclosed in the reporting person details of the Form 4.

Q: How many insider sale transactions were reported in this VICR Form 4?

The Form 4 reports 14 non-derivative open-market sale transactions of Vicor common stock on June 8, 2026. It also includes one entry showing indirect holdings through a trust.

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

Vicor Corporation Chairman and CEO Patrizio Vinciarelli reported open-market sales of 20,000 shares of Vicor common stock on June 8, 2026. The shares were sold in multiple transactions at weighted average prices between $261.74 and $277.61, under a Rule 10b5-1 trading plan adopted on February 26, 2026. Following these sales, he directly owns 8,707,490 shares and indirectly holds 167,125 shares as trustee of an irrevocable trust for his child.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares ($5,418,699)

Net Sell 15 txns

Insider VINCIARELLI PATRIZIO

Role Chairman and CEO

Sold 20,000 shs ($5.42M)

Type	Security	Shares	Price	Value
Sale	Common Stock	600	$261.815	$157K
Sale	Common Stock	900	$263.0567	$237K
Sale	Common Stock	800	$264.5763	$212K
Sale	Common Stock	1,400	$265.245	$371K
Sale	Common Stock	400	$266.7352	$107K
Sale	Common Stock	300	$267.6867	$80K
Sale	Common Stock	640	$269.5705	$173K
Sale	Common Stock	2,260	$270.6558	$612K
Sale	Common Stock	2,958	$271.8096	$804K
Sale	Common Stock	4,002	$272.7702	$1.09M
Sale	Common Stock	3,140	$273.6792	$859K
Sale	Common Stock	1,600	$274.6008	$439K
Sale	Common Stock	600	$275.4167	$165K
Sale	Common Stock	400	$277.61	$111K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 8,707,490 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 $261.7400 to $261.9300. 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 (16) 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 $262.8000 to $263.3300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $264.0100 to $265.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $265.0500 to $265.4800. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $266.3200 to $266.8800. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $267.6700 to $267.7200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $269.2100 to $270.2000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.2600 to $271.2500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.2600 to $272.2300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.2700 to $273.2600. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.2700 to $274.2400. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.2700 to $275.1000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.2700 to $275.5000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $277.6100 to $277.6100.

Key Figures

Shares sold: 20,000 shares Sale price range: $261.74–$277.61 per share Direct holdings after sale: 8,707,490 shares +3 more

6 metrics

Shares sold 20,000 shares Total non-derivative open-market sales on June 8, 2026

Sale price range $261.74–$277.61 per share Weighted average price ranges across reported trades

Direct holdings after sale 8,707,490 shares Common stock directly owned following transactions

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

Number of sale transactions 14 transactions Non-derivative open-market or private sales

Trading plan adoption date February 26, 2026 Date Rule 10b5-1 plan was adopted

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

"Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person."

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.

greater-than-10% owner regulatory

"is_ten_percent_owner: 1"

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Form 4 Insider Transactions: What Each Field Means →

06/09/2026 - 01:39 PM

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)
06/08/2026

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	06/08/2026		S⁽²⁾		600	D	$261.815⁽³⁾	8,707,490	D
Common Stock	06/08/2026		S⁽²⁾		900	D	$263.0567⁽⁴⁾	8,706,590	D
Common Stock	06/08/2026		S⁽²⁾		800	D	$264.5763⁽⁵⁾	8,705,790	D
Common Stock	06/08/2026		S⁽²⁾		1,400	D	$265.245⁽⁶⁾	8,704,390	D
Common Stock	06/08/2026		S⁽²⁾		400	D	$266.7352⁽⁷⁾	8,703,990	D
Common Stock	06/08/2026		S⁽²⁾		300	D	$267.6867⁽⁸⁾	8,703,690	D
Common Stock	06/08/2026		S⁽²⁾		640	D	$269.5705⁽⁹⁾	8,703,050	D
Common Stock	06/08/2026		S⁽²⁾		2,260	D	$270.6558⁽¹⁰⁾	8,700,790	D
Common Stock	06/08/2026		S⁽²⁾		2,958	D	$271.8096⁽¹¹⁾	8,697,832	D
Common Stock	06/08/2026		S⁽²⁾		4,002	D	$272.7702⁽¹²⁾	8,693,830	D
Common Stock	06/08/2026		S⁽²⁾		3,140	D	$273.6792⁽¹³⁾	8,690,690	D
Common Stock	06/08/2026		S⁽²⁾		1,600	D	$274.6008⁽¹⁴⁾	8,689,090	D
Common Stock	06/08/2026		S⁽²⁾		600	D	$275.4167⁽¹⁵⁾	8,688,490	D
Common Stock	06/08/2026		S⁽²⁾		400	D	$277.61⁽¹⁶⁾	8,688,090	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 $261.7400 to $261.9300. 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 (16) 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 $262.8000 to $263.3300.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $264.0100 to $265.0000.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $265.0500 to $265.4800.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $266.3200 to $266.8800.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $267.6700 to $267.7200.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $269.2100 to $270.2000.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.2600 to $271.2500.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.2600 to $272.2300.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.2700 to $273.2600.

13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.2700 to $274.2400.

14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.2700 to $275.1000.

15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.2700 to $275.5000.

16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $277.6100 to $277.6100.

	/s/Quentin A. Fendelet. Attorney in fact for Patrizio Vinciarelli	06/09/2026
	** 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.
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

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

Patrizio Vinciarelli sold 20,000 shares of Vicor common stock. The sales were reported as 14 separate open-market transactions on June 8, 2026, according to the Form 4 transaction summary.

What price range did the VICR insider sales occur at on June 8, 2026?

The Vicor insider sales occurred at weighted average prices between $261.74 and $277.61 per share. Multiple trades were executed within narrower ranges disclosed in the footnotes to the Form 4.

Was the VICR insider sale by Patrizio Vinciarelli under a 10b5-1 plan?

Yes. The Form 4 states the sale was effected under a Rule 10b5-1 trading plan adopted by Patrizio Vinciarelli on February 26, 2026, indicating the sale was pre-arranged.

How many VICR shares does Patrizio Vinciarelli own after these transactions?

After the reported sales, Patrizio Vinciarelli directly owns 8,707,490 shares of Vicor common stock. He also indirectly holds 167,125 shares as trustee of an irrevocable trust for his child.

What roles does Patrizio Vinciarelli hold at Vicor Corporation (VICR)?

Patrizio Vinciarelli is identified as Chairman and CEO of Vicor Corporation and also a greater-than-10% owner. These capacities are disclosed in the reporting person details of the Form 4.

How many insider sale transactions were reported in this VICR Form 4?

The Form 4 reports 14 non-derivative open-market sale transactions of Vicor common stock on June 8, 2026. It also includes one entry showing indirect holdings through a trust.