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Vicor (VICR) CEO Vinciarelli sells 24,943 shares in Rule 10b5-1 trades

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Vicor Corporation Chairman and CEO Patrizio Vinciarelli reported open-market sales of 24,943 shares of Vicor common stock on April 9, 2026. The shares were sold in multiple transactions at weighted average prices ranging from $186.0000 to $189.0000 per share.

According to the filing, these sales were effected under a Rule 10b5-1 trading plan adopted on November 3, 2025. Following the transactions, Vinciarelli holds 8,960,041 Vicor shares directly and 171,125 shares indirectly as trustee of an irrevocable trust established for the benefit of his child.

Positive

  • None.

Negative

  • None.
Insider VINCIARELLI PATRIZIO
Role Chairman and CEO
Sold 24,943 shs ($4.67M)
Type Security Shares Price Value
Sale Common Stock 4,721 $186.00 $878K
Sale Common Stock 10,000 $187.00 $1.87M
Sale Common Stock 10,000 $188.00 $1.88M
Sale Common Stock 222 $189.00 $42K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 8,980,263 shares (Direct); Common Stock — 171,125 shares (Indirect, See footnote)
Footnotes (1)
  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 $186.0000 to $186.0000. 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 $187.0000 to $187.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.0000 to $188.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.0000 to $189.0000.
Shares sold 24,943 shares Total Vicor common shares sold on April 9, 2026
Sale price range $186.0000–$189.0000 per share Weighted average prices across reported sale tranches
Direct holdings after sale 8,960,041 shares Vicor common stock held directly by CEO after transactions
Indirect trust holdings 171,125 shares Held by CEO as trustee of irrevocable trust for his child
Number of sale transactions 4 transactions Open-market sales of common stock reported with code S
Trading plan adoption date November 3, 2025 Date CEO adopted Rule 10b5-1 trading plan used for these sales
Rule 10b5-1 trading plan regulatory
"This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 3, 2025."
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
"These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012..."
open-market sale financial
"transaction_action": "open-market sale" for each non-derivative common stock transaction on April 9, 2026"
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.
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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).
X
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)
XDirectorX10% Owner
XOfficer (give title below)Other (specify below)
Chairman and CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/09/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock171,125ISee footnote(1)
Common Stock04/09/2026S(2)4,721D$186(3)8,980,263D
Common Stock04/09/2026S(2)10,000D$187(4)8,970,263D
Common Stock04/09/2026S(2)10,000D$188(5)8,960,263D
Common Stock04/09/2026S(2)222D$189(6)8,960,041D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
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 $186.0000 to $186.0000. 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 $187.0000 to $187.0000.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.0000 to $188.0000.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.0000 to $189.0000.
/s/Quentin A. Fendelet. Attorney in fact for Patrizio Vinciarelli04/10/2026
** Signature of Reporting PersonDate
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 did Vicor (VICR) Chairman and CEO Patrizio Vinciarelli report in this Form 4?

Patrizio Vinciarelli reported selling 24,943 shares of Vicor common stock in open-market transactions on April 9, 2026. The trades were executed at weighted average prices between $186.0000 and $189.0000 per share under a pre-established Rule 10b5-1 trading plan.

At what prices did the Vicor (VICR) CEO sell his shares on April 9, 2026?

The CEO’s sales occurred at weighted average prices ranging from $186.0000 to $189.0000 per share. Individual trades within each tranche were executed within those exact price ranges, as described in multiple footnotes detailing the weighted average pricing.

How many Vicor (VICR) shares does Patrizio Vinciarelli hold after these transactions?

After the reported sales, Patrizio Vinciarelli holds 8,960,041 Vicor shares directly. He also has indirect ownership of 171,125 additional shares as trustee of an irrevocable trust established for the benefit of his child, according to the filing’s ownership disclosures.

Were the Vicor (VICR) CEO’s stock sales made under a Rule 10b5-1 trading plan?

Yes. The filing states that the sale was effected pursuant to a Rule 10b5-1 trading plan adopted by Patrizio Vinciarelli on November 3, 2025. Such plans pre-arrange trades, helping separate routine diversification from discretionary market-timed transactions.

What indirect holdings in Vicor (VICR) stock does the CEO report on this Form 4?

The CEO reports indirect ownership of 171,125 Vicor common shares. These shares are held by him as trustee of the Patrizio Vinciarelli Irrevocable Trust dated December 21, 2012, which was established for the benefit of his child, as noted in the footnotes.