Was the VICR CEO’s 20,000-share sale under a Rule 10b5-1 plan?

Yes. A footnote states the sale was effected under a Rule 10b5-1 trading plan adopted on February 26, 2026 . Such plans pre-schedule trades, so the timing of these transactions is described as following that pre-arranged instruction rather than being discretionary.

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

Q: What insider transaction did VICR CEO Patrizio Vinciarelli report?

Patrizio Vinciarelli reported selling 20,000 shares of Vicor common stock in multiple open-market transactions on June 23, 2026 . The trades were executed at various prices in the $326–$347 range, as detailed in the Form 4 filing and its footnotes.

Q: How many separate sale transactions are reported in this VICR Form 4?

The Form 4 lists 18 non-derivative sale transactions of Vicor common stock on June 23, 2026. Each line reflects a separate block of shares with its own share count and weighted-average sale price, contributing to the total of 20,000 shares sold.

Q: What does the irrevocable trust holding VICR shares represent?

The filing notes 167,125 shares are held by Patrizio Vinciarelli as trustee of the Patrizio Vinciarelli Irrevocable Trust , established for his child’s benefit. These shares are reported as indirectly owned, reflecting his role as trustee rather than direct personal ownership.

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 Vicor common stock. The transactions occurred on June 23, 2026 at prices ranging from $326.42 to $347.15 per share, in multiple trades.

The filing states these sales were made under a Rule 10b5-1 trading plan adopted on February 26, 2026, indicating they were pre-arranged. Following the sales, Vinciarelli directly holds 8,507,490 shares and indirectly holds 167,125 shares as trustee of an irrevocable trust.

Insider Trade Summary 10b5-1

Net Seller: 20,000 shares ($6,749,066)

Net Sell 19 txns

Insider VINCIARELLI PATRIZIO

Role Chairman & CEO

Sold 20,000 shs ($6.75M)

Type	Security	Shares	Price	Value
Sale	Common Stock	600	$326.6833	$196K
Sale	Common Stock	500	$327.884	$164K
Sale	Common Stock	600	$329.7867	$198K
Sale	Common Stock	1,000	$331.1742	$331K
Sale	Common Stock	400	$331.8175	$133K
Sale	Common Stock	805	$333.1021	$268K
Sale	Common Stock	1,400	$334.1828	$468K
Sale	Common Stock	3,295	$335.6377	$1.11M
Sale	Common Stock	2,000	$336.4575	$673K
Sale	Common Stock	400	$337.28	$135K
Sale	Common Stock	899	$338.462	$304K
Sale	Common Stock	2,201	$339.8206	$748K
Sale	Common Stock	1,900	$340.8201	$648K
Sale	Common Stock	600	$341.8458	$205K
Sale	Common Stock	600	$342.9444	$206K
Sale	Common Stock	1,000	$344.277	$344K
Sale	Common Stock	1,200	$345.3423	$414K
Sale	Common Stock	600	$347.07	$208K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 8,507,490 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 $326.4200 and $326.8800. 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 (20) 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 $327.4200 and $328.2900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.5000 and $330.4800. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $330.6100 and $331.6000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.6200 and $332.3300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.7700 and $333.5000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.9000 and $334.5300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.0700 and $336.0100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.0900 and $337.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $337.1300 and $337.5700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.2200 and $339.0900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.2300 and $340.2100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $340.3200 and $341.3000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.3500 and $342.2600. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.4300 and $343.3800. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $343.9900 and $344.9400. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $345.2000 and $345.9900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $346.9500 and $347.1500.

Key Figures

Shares sold: 20,000 shares Sale price range: $326.42–$347.15 per share Direct holdings after transaction: 8,507,490 shares +3 more

6 metrics

Shares sold 20,000 shares Aggregate non-derivative open-market sales on June 23, 2026

Sale price range $326.42–$347.15 per share Price ranges from transaction lines and footnotes

Direct holdings after transaction 8,507,490 shares Common stock directly owned following June 23, 2026 sales

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

Number of sale transactions 18 transactions Non-derivative open-market sales reported in the Form 4

Net share direction 20,000 share net-sell transactionSummary netBuySellShares and netBuySellDirection

Key Terms

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

5 terms

Rule 10b5-1 trading plan financial

"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.

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.

Irrevocable Trust financial

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

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.

indirect ownership financial

"direct_or_indirect: I, ownership_type: indirect, nature_of_ownership: See Footnote"

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/25/2026 - 10:48 AM Accepted by SEC EDGAR 06/25/2026 - 10:47 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)

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)
06/23/2026

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	06/23/2026		S⁽²⁾		600	D	$326.6833⁽³⁾	8,507,490	D
Common Stock	06/23/2026		S⁽²⁾		500	D	$327.884⁽⁴⁾	8,506,990	D
Common Stock	06/23/2026		S⁽²⁾		600	D	$329.7867⁽⁵⁾	8,506,390	D
Common Stock	06/23/2026		S⁽²⁾		1,000	D	$331.1742⁽⁶⁾	8,505,390	D
Common Stock	06/23/2026		S⁽²⁾		400	D	$331.8175⁽⁷⁾	8,504,990	D
Common Stock	06/23/2026		S⁽²⁾		805	D	$333.1021⁽⁸⁾	8,504,185	D
Common Stock	06/23/2026		S⁽²⁾		1,400	D	$334.1828⁽⁹⁾	8,502,785	D
Common Stock	06/23/2026		S⁽²⁾		3,295	D	$335.6377⁽¹⁰⁾	8,499,490	D
Common Stock	06/23/2026		S⁽²⁾		2,000	D	$336.4575⁽¹¹⁾	8,497,490	D
Common Stock	06/23/2026		S⁽²⁾		400	D	$337.28⁽¹²⁾	8,497,090	D
Common Stock	06/23/2026		S⁽²⁾		899	D	$338.462⁽¹³⁾	8,496,191	D
Common Stock	06/23/2026		S⁽²⁾		2,201	D	$339.8206⁽¹⁴⁾	8,493,990	D
Common Stock	06/23/2026		S⁽²⁾		1,900	D	$340.8201⁽¹⁵⁾	8,492,090	D
Common Stock	06/23/2026		S⁽²⁾		600	D	$341.8458⁽¹⁶⁾	8,491,490	D
Common Stock	06/23/2026		S⁽²⁾		600	D	$342.9444⁽¹⁷⁾	8,490,890	D
Common Stock	06/23/2026		S⁽²⁾		1,000	D	$344.277⁽¹⁸⁾	8,489,890	D
Common Stock	06/23/2026		S⁽²⁾		1,200	D	$345.3423⁽¹⁹⁾	8,488,690	D
Common Stock	06/23/2026		S⁽²⁾		600	D	$347.07⁽²⁰⁾	8,488,090	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 $326.4200 and $326.8800. 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 (20) 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 $327.4200 and $328.2900.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.5000 and $330.4800.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $330.6100 and $331.6000.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.6200 and $332.3300.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.7700 and $333.5000.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.9000 and $334.5300.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.0700 and $336.0100.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.0900 and $337.0000.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $337.1300 and $337.5700.

13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.2200 and $339.0900.

14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.2300 and $340.2100.

15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $340.3200 and $341.3000.

16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.3500 and $342.2600.

17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.4300 and $343.3800.

18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $343.9900 and $344.9400.

19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $345.2000 and $345.9900.

20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $346.9500 and $347.1500.

	/s/Quentin A. Fendelet Attorney in Fact for Patrizio Vinciarelli	06/25/2026
	** 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 multiple open-market transactions on June 23, 2026. The trades were executed at various prices in the $326–$347 range, as detailed in the Form 4 filing and its footnotes.

At what prices were the VICR shares sold in this Form 4 filing?

The reported Vicor share sales occurred at prices ranging from $326.42 to $347.15 per share. Individual transaction lines and footnotes show multiple weighted-average prices and price ranges within this band for separate blocks of stock sold on June 23, 2026.

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

After the reported sales, Patrizio Vinciarelli directly holds 8,507,490 shares of Vicor common stock. The filing also shows an additional 167,125 shares held indirectly, with Vinciarelli acting as trustee of an irrevocable trust established for the benefit of his child.

How many separate sale transactions are reported in this VICR Form 4?

The Form 4 lists 18 non-derivative sale transactions of Vicor common stock on June 23, 2026. Each line reflects a separate block of shares with its own share count and weighted-average sale price, contributing to the total of 20,000 shares sold.

What does the irrevocable trust holding VICR shares represent?

The filing notes 167,125 shares are held by Patrizio Vinciarelli as trustee of the Patrizio Vinciarelli Irrevocable Trust, established for his child’s benefit. These shares are reported as indirectly owned, reflecting his role as trustee rather than direct personal ownership.