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

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 company stock. On June 16, 2026, he sold a total of 20,000 shares of Vicor common stock in 17 separate open-market transactions, at weighted average prices ranging from about $319.66 to $341.80 per share, based on disclosed price ranges.

The transactions were executed under a pre-arranged Rule 10b5-1 trading plan adopted on February 26, 2026. After these sales, Vinciarelli directly owns 8,586,910 shares of Vicor common stock and also serves as trustee for 167,125 shares held in an irrevocable trust established for the benefit of his child.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares ($6,564,097)

Net Sell 18 txns

Insider VINCIARELLI PATRIZIO

Role Chairman and CEO

Sold 20,000 shs ($6.56M)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,180	$320.0291	$378K
Sale	Common Stock	400	$321.0244	$128K
Sale	Common Stock	1,001	$322.8182	$323K
Sale	Common Stock	2,745	$324.2447	$890K
Sale	Common Stock	1,770	$325.3986	$576K
Sale	Common Stock	2,884	$326.3244	$941K
Sale	Common Stock	1,901	$327.3452	$622K
Sale	Common Stock	1,400	$328.879	$460K
Sale	Common Stock	2,896	$329.9204	$955K
Sale	Common Stock	405	$331.2283	$134K
Sale	Common Stock	200	$332.245	$66K
Sale	Common Stock	600	$335.08	$201K
Sale	Common Stock	400	$337.1323	$135K
Sale	Common Stock	718	$338.3934	$243K
Sale	Common Stock	900	$339.3556	$305K
Sale	Common Stock	200	$340.22	$68K
Sale	Common Stock	400	$341.735	$137K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 8,586,910 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 $319.6600 and $320.3700. 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 (19) 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 $320.9000 and $321.2850. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $322.5600 and $323.5400. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $323.7400 and $324.6300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.7800 and $325.7700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $325.8200 and $326.7200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.0400 and $328.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.2750 and $329.2600. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.2900 and $330.2700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $330.2900 and $331.2500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.2400 and $332.2500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.7900 and $335.2300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.5500 and $337.3050. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.0500 and $338.7300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.1900 and $339.7300 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $340.2100 and $340.2300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.6700 and $341.8000

Key Figures

Shares sold: 20,000 shares Highest reported weighted average price: $341.80/share Lowest reported weighted average price: $319.66/share +4 more

7 metrics

Shares sold 20,000 shares Total common shares sold on June 16, 2026

Highest reported weighted average price $341.80/share Upper end of disclosed sale price ranges

Lowest reported weighted average price $319.66/share Lower end of disclosed sale price ranges

Direct holdings after transaction 8,586,910 shares Common stock directly owned after June 16, 2026 sales

Indirect trust holdings 167,125 shares Shares held as trustee of irrevocable trust

Number of sale entries 17 transactions Separate non-derivative sale lines reported

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. These shares were sold in multiple transactions..."

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

"Patrizio Vinciarelli 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; transaction_code_description: Sale in open market or private transaction"

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

"direct_or_indirect: I, nature_of_ownership: See footnote, indicating shares held via trust"

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Form 4 Insider Transactions: What Each Field Means →

06/17/2026 - 11:16 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)
06/16/2026

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	06/16/2026		S⁽²⁾		1,180	D	$320.0291⁽³⁾	8,586,910	D
Common Stock	06/16/2026		S⁽²⁾		400	D	$321.0244⁽⁴⁾	8,586,510	D
Common Stock	06/16/2026		S⁽²⁾		1,001	D	$322.8182⁽⁵⁾	8,585,509	D
Common Stock	06/16/2026		S⁽²⁾		2,745	D	$324.2447⁽⁶⁾	8,582,764	D
Common Stock	06/16/2026		S⁽²⁾		1,770	D	$325.3986⁽⁷⁾	8,580,994	D
Common Stock	06/16/2026		S⁽²⁾		2,884	D	$326.3244⁽⁸⁾	8,578,110	D
Common Stock	06/16/2026		S⁽²⁾		1,901	D	$327.3452⁽⁹⁾	8,576,209	D
Common Stock	06/16/2026		S⁽²⁾		1,400	D	$328.879⁽¹⁰⁾	8,574,809	D
Common Stock	06/16/2026		S⁽²⁾		2,896	D	$329.9204⁽¹¹⁾	8,571,913	D
Common Stock	06/16/2026		S⁽²⁾		405	D	$331.2283⁽¹²⁾	8,571,508	D
Common Stock	06/16/2026		S⁽²⁾		200	D	$332.245⁽¹³⁾	8,571,308	D
Common Stock	06/16/2026		S⁽²⁾		600	D	$335.08⁽¹⁴⁾	8,570,708	D
Common Stock	06/16/2026		S⁽²⁾		400	D	$337.1323⁽¹⁵⁾	8,570,308	D
Common Stock	06/16/2026		S⁽²⁾		718	D	$338.3934⁽¹⁶⁾	8,569,590	D
Common Stock	06/16/2026		S⁽²⁾		900	D	$339.3556⁽¹⁷⁾	8,568,690	D
Common Stock	06/16/2026		S⁽²⁾		200	D	$340.22⁽¹⁸⁾	8,568,490	D
Common Stock	06/16/2026		S⁽²⁾		400	D	$341.735⁽¹⁹⁾	8,568,090	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 $319.6600 and $320.3700. 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 (19) 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 $320.9000 and $321.2850.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $322.5600 and $323.5400.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $323.7400 and $324.6300.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.7800 and $325.7700.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $325.8200 and $326.7200.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.0400 and $328.0000.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.2750 and $329.2600.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.2900 and $330.2700.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $330.2900 and $331.2500.

13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.2400 and $332.2500.

14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.7900 and $335.2300.

15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.5500 and $337.3050.

16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.0500 and $338.7300.

17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.1900 and $339.7300

18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $340.2100 and $340.2300.

19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.6700 and $341.8000

	/s/Quentin A. Fendelet. Attorney in fact for Patrizio Vinciarelli	06/17/2026
	** 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 on this Form 4?

Patrizio Vinciarelli reported selling 20,000 shares of Vicor common stock in multiple open-market transactions on June 16, 2026. These sales were disclosed as non-derivative transactions, reflecting direct ownership changes in his Vicor share position.

At what prices did VICR shares sell in Patrizio Vinciarelli’s June 16, 2026 Form 4?

The reported sales occurred at weighted average prices between about $319.66 and $341.80 per share. Footnotes explain that each line’s price is an average of multiple trades within specified intraday ranges.

How many VICR shares does Patrizio Vinciarelli hold after the June 16, 2026 sales?

After the reported sales, Patrizio Vinciarelli directly holds 8,586,910 shares of Vicor common stock. In addition, he is trustee for 167,125 Vicor shares held in an irrevocable trust established for the benefit of his child.

Was the June 16, 2026 VICR stock sale by Patrizio Vinciarelli under a Rule 10b5-1 plan?

Yes. A footnote states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted by Patrizio Vinciarelli on February 26, 2026. Such pre-arranged plans schedule trades in advance under defined parameters.

How many total VICR shares did Patrizio Vinciarelli sell according to this Form 4?

The Form 4 transaction summary shows 20,000 Vicor common shares sold across 17 separate non-derivative sale entries. There were no reported option exercises, gifts, or tax-withholding transactions in this particular Form 4 filing.

What does the trust holding in the VICR Form 4 filing represent?

The filing notes 167,125 Vicor shares are held 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, and these shares are reported as indirectly owned.