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Vicor CEO sells 20,000 shares in planned trades

Vicor Corporation Chairman and CEO Patrizio Vinciarelli reported open-market sales of 20,000 shares of Vicor common stock on June 3, 2026, across multiple transactions.

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

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 3, 2026, across multiple transactions. The sales were executed at weighted average prices within ranges from $323.83 to $339.95 per share. A footnote states that the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on February 26, 2026. Following these transactions, he directly holds 8,748,090 shares of common stock and indirectly holds 167,125 shares as trustee of an irrevocable trust.

Positive

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Negative

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Insider VINCIARELLI PATRIZIO
Role Chairman and CEO
Sold 20,000 shs ($6.60M)
Type Security Shares Price Value
Sale Common Stock 577 $324.3598 $187K
Sale Common Stock 1,219 $325.321 $397K
Sale Common Stock 528 $326.3434 $172K
Sale Common Stock 3,245 $327.3124 $1.06M
Sale Common Stock 2,444 $328.425 $803K
Sale Common Stock 4,132 $329.4922 $1.36M
Sale Common Stock 2,113 $330.1829 $698K
Sale Common Stock 1,342 $331.4954 $445K
Sale Common Stock 400 $332.1975 $133K
Sale Common Stock 600 $333.8533 $200K
Sale Common Stock 1,278 $335.3126 $429K
Sale Common Stock 222 $336.1867 $75K
Sale Common Stock 800 $337.52 $270K
Sale Common Stock 900 $338.5189 $305K
Sale Common Stock 200 $339.845 $68K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 8,748,090 shares (Direct); Common Stock — 167,125 shares (Indirect, See footnote)
Footnotes (17)
  1. F1. 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. F2. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.
  3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $323.8300 to $324.7900. 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 (17) to this Form 4.
  4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.8400 to $325.6500.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $325.8500 to $326.7500.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.8800 to $327.8200.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.8800 to $328.8600.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.9400 to $329.8900.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.9500 to $330.9250.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.1600 to $332.0000.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.1800 to $332.2300.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.6600 to $334.0000.
  13. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.9700 to $335.9500.
  14. F14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.0500 to $336.2200.
  15. F15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $337.1400 to $338.0500.
  16. F16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.4200 to $338.5600.
  17. F17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.7400 to $339.9500.
Shares sold 20,000 shares Total common shares sold on June 3, 2026
Price range $323.83–$339.95/share Weighted average price ranges from multiple sale transactions
Direct holdings after sale 8,767,513 shares Common shares directly owned following June 3, 2026 sales
Indirect trust holdings 167,125 shares Shares held as trustee of irrevocable trust for child
Number of sale entries 15 transactions Non-derivative open-market or private sale entries
Rule 10b5-1 adoption date February 26, 2026 Date CEO adopted the trading plan governing 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"
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
"Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012"
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.
non-derivative financial
"transaction_type": "non-derivative""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Vicor (VICR) report for Patrizio Vinciarelli?
Vicor reported that Chairman and CEO Patrizio Vinciarelli sold 20,000 shares of common stock in multiple open-market transactions. These trades occurred on June 3, 2026 at various weighted average prices in the low-to-high $300s per share, according to the Form 4.

At what prices did the Vicor (VICR) CEO sell his shares?
The CEO’s Form 4 shows weighted average sale prices within ranges from $323.83 to $339.95 per share. Each line represents multiple trades inside a specific range, with detailed price breakdowns available from Vicor, its shareholders, or SEC staff upon request.

How many Vicor (VICR) shares does the CEO own after this Form 4 sale?
After selling 20,000 shares, Chairman and CEO Patrizio Vinciarelli directly owns 8,767,513 Vicor common shares. He also has indirect ownership of 167,125 shares held as trustee of the Patrizio Vinciarelli Irrevocable Trust established for the benefit of his child.

Was the Vicor (VICR) CEO’s share sale made under a Rule 10b5-1 plan?
Yes. A footnote states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the CEO on February 26, 2026. Such plans pre-schedule trades, which can make transaction timing less reflective of near-term views on the stock.

How many transactions and total shares sold are shown in this Vicor (VICR) Form 4?
The summary indicates 15 sale entries totaling 20,000 shares of Vicor common stock. All are coded as open-market or private sales, with one additional entry describing 167,125 indirectly held shares as trustee of an irrevocable trust for his child’s benefit.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →
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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)
06/03/2026		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 Stock167,125ISee footnote(1)
Common Stock06/03/2026S(2)577D$324.3598(3)8,767,513D
Common Stock06/03/2026S(2)1,219D$325.321(4)8,766,294D
Common Stock06/03/2026S(2)528D$326.3434(5)8,765,766D
Common Stock06/03/2026S(2)3,245D$327.3124(6)8,762,521D
Common Stock06/03/2026S(2)2,444D$328.425(7)8,760,077D
Common Stock06/03/2026S(2)4,132D$329.4922(8)8,755,945D
Common Stock06/03/2026S(2)2,113D$330.1829(9)8,753,832D
Common Stock06/03/2026S(2)1,342D$331.4954(10)8,752,490D
Common Stock06/03/2026S(2)400D$332.1975(11)8,752,090D
Common Stock06/03/2026S(2)600D$333.8533(12)8,751,490D
Common Stock06/03/2026S(2)1,278D$335.3126(13)8,750,212D
Common Stock06/03/2026S(2)222D$336.1867(14)8,749,990D
Common Stock06/03/2026S(2)800D$337.52(15)8,749,190D
Common Stock06/03/2026S(2)900D$338.5189(16)8,748,290D
Common Stock06/03/2026S(2)200D$339.845(17)8,748,090D
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 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 $323.8300 to $324.7900. 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 (17) 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 $324.8400 to $325.6500.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $325.8500 to $326.7500.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.8800 to $327.8200.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.8800 to $328.8600.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.9400 to $329.8900.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.9500 to $330.9250.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.1600 to $332.0000.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.1800 to $332.2300.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.6600 to $334.0000.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.9700 to $335.9500.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.0500 to $336.2200.
15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $337.1400 to $338.0500.
16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.4200 to $338.5600.
17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.7400 to $339.9500.
/s/Kemble D. Morrison Attorney in fact for Patrizio Vinciarelli06/04/2026
** 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

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