Were the recent Vicor (VICR) insider share sales under a Rule 10b5-1 plan?

Yes. The filing states the sale was effected under a Rule 10b5-1 trading plan. The plan was adopted by Patrizio Vinciarelli on November 3, 2025, indicating the April 16, 2026 sales were pre-arranged rather than discretionary market-timing decisions.

What does the Vicor (VICR) filing say about the price ranges for the CEO’s share sales?

The filing explains each reported price is a weighted average over multiple trades within stated ranges. For example, some shares were sold between $196.0000 and $196.8900, and others within ranges up to $199.8600, with full trade details available on request.

Vicor (VICR) CEO sells 40,000 shares under 10b5-1 plan

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 40,000 shares of Vicor common stock. The transactions on April 16, 2026 were executed in four blocks at weighted average prices of $196.1090, $197.0001, $198.0829 and $199.0703 per share.

The sales were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on November 3, 2025. After these sales, Vinciarelli continues to hold 8,855,090 shares directly and 171,125 shares indirectly through the Patrizio Vinciarelli Irrevocable Trust established for the benefit of his child.

Insider Trade Summary 10b5-1

Net Seller: 40,000 shares ($7,905,591)

Net Sell 5 txns

Insider VINCIARELLI PATRIZIO

Role Chairman and CEO

Sold 40,000 shs ($7.91M)

Type	Security	Shares	Price	Value
Sale	Common Stock	9,994	$196.109	$1.96M
Sale	Common Stock	10,006	$197.0001	$1.97M
Sale	Common Stock	7,000	$198.0829	$1.39M
Sale	Common Stock	13,000	$199.0703	$2.59M
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 8,885,096 shares (Direct); Common Stock — 171,125 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 November 3, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $196.0000 to $196.8900. 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 (6) 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 $197.0000 to $197.1600. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $198.0000 to $198.6000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $199.0000 to $199.8600.

Key Figures

Shares sold: 40,000 shares Sale price block 1: $196.1090 per share Sale price block 2: $197.0001 per share +4 more

7 metrics

Shares sold 40,000 shares Total common stock sold on April 16, 2026 in open-market transactions

Sale price block 1 $196.1090 per share Weighted average price for 9,994 shares sold

Sale price block 2 $197.0001 per share Weighted average price for 10,006 shares sold

Sale price block 3 $198.0829 per share Weighted average price for 7,000 shares sold

Sale price block 4 $199.0703 per share Weighted average price for 13,000 shares sold

Direct holdings after sale 8,855,090 shares Common stock directly owned by Patrizio Vinciarelli following transactions

Indirect holdings 171,125 shares Common stock held through the Patrizio Vinciarelli Irrevocable Trust

Key Terms

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

5 terms

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.

Rule 10b5-1 trading plan regulatory

"This sale was effected pursuant to a Rule 10b5-1 trading plan adopted"

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"

indirect ownership financial

""ownership_type": "indirect""

Form 4 Insider Transactions: What Each Field Means →

04/17/2026 - 01:08 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)
04/16/2026

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								171,125	I	See footnote⁽¹⁾
Common Stock	04/16/2026		S⁽²⁾		9,994	D	$196.109⁽³⁾	8,885,096	D
Common Stock	04/16/2026		S⁽²⁾		10,006	D	$197.0001⁽⁴⁾	8,875,090	D
Common Stock	04/16/2026		S⁽²⁾		7,000	D	$198.0829⁽⁵⁾	8,868,090	D
Common Stock	04/16/2026		S⁽²⁾		13,000	D	$199.0703⁽⁶⁾	8,855,090	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 November 3, 2025.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $196.0000 to $196.8900. 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 (6) 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 $197.0000 to $197.1600.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $198.0000 to $198.6000.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $199.0000 to $199.8600.

	/s/Kemble D. Morrison Attorney in fact for Patrizio Vinciarelli	04/17/2026
	** 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 Vicor (VICR) report for Patrizio Vinciarelli?

Vicor reported that Chairman and CEO Patrizio Vinciarelli sold 40,000 shares of common stock. The sales occurred on April 16, 2026 in four open-market transactions, with weighted average prices between $196.1090 and $199.0703 per share, as disclosed in the filing.

At what prices did the Vicor (VICR) CEO sell his shares?

The CEO’s 40,000 Vicor shares were sold at weighted average prices from $196.1090 to $199.0703. Individual sale blocks were priced at $196.1090, $197.0001, $198.0829 and $199.0703 per share, each reflecting weighted averages over multiple trades within narrow price ranges.

How many Vicor (VICR) shares does Patrizio Vinciarelli hold after the reported sales?

After the reported transactions, Patrizio Vinciarelli holds 8,855,090 Vicor shares directly. He also has indirect ownership of 171,125 additional shares through the Patrizio Vinciarelli Irrevocable Trust, which was established for the benefit of his child, according to the disclosure.

What indirect holdings of Vicor (VICR) stock are reported for Patrizio Vinciarelli?

The filing reports 171,125 Vicor shares held indirectly through a trust. These shares are held by Vinciarelli as trustee of the Patrizio Vinciarelli Irrevocable Trust dated December 21, 2012, which was established for the benefit of his child, according to the disclosure.