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Vicor CEO sells 20,000 shares under trading plan

Vicor Corp Chairman and CEO Patrizio Vinciarelli, a more than 10% owner, reported open-market sales of 20,000 shares of common stock on June 1, 2026.

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

Rhea-AI Filing Summary

Vicor Corp Chairman and CEO Patrizio Vinciarelli, a more than 10% owner, reported open-market sales of 20,000 shares of common stock on June 1, 2026. The shares were sold in multiple transactions at weighted average prices, with ranges from $312.6400 to $329.5400 per share.

After these sales, Vinciarelli directly holds 8,788,090 shares of Vicor common stock and indirectly holds 167,125 shares as trustee of an irrevocable trust for his child. The filing states the sales were made under a pre-arranged Rule 10b5-1 trading plan adopted on February 26, 2026.

Positive

  • None.

Negative

  • None.
Insider VINCIARELLI PATRIZIO
Role Chairman and CEO
Sold 20,000 shs ($6.44M)
Type Security Shares Price Value
Sale Common Stock 800 $313.0488 $250K
Sale Common Stock 800 $313.985 $251K
Sale Common Stock 1,200 $315.0625 $378K
Sale Common Stock 1,822 $316.2064 $576K
Sale Common Stock 900 $317.4252 $286K
Sale Common Stock 1,713 $318.5845 $546K
Sale Common Stock 700 $319.5029 $224K
Sale Common Stock 100 $320.16 $32K
Sale Common Stock 1,767 $321.9307 $569K
Sale Common Stock 1,437 $323.2778 $465K
Sale Common Stock 1,598 $324.1038 $518K
Sale Common Stock 2,026 $325.1937 $659K
Sale Common Stock 1,100 $325.9797 $359K
Sale Common Stock 1,000 $327.216 $327K
Sale Common Stock 2,637 $328.5763 $866K
Sale Common Stock 400 $329.4225 $132K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 8,788,090 shares (Direct); Common Stock — 167,125 shares (Indirect, See footnote)
Footnotes (18)
  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 $312.6400 to $313.3800. 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 (18) 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 $313.6400 to $314.5800.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $314.6500 to $315.4700.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.6900 to $316.6300.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $316.9600 to $317.6700.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $318.1000 to $318.9400.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.1400 to $320.1300.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.1600 to $320.1600.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $321.4500 to $322.3700.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $322.5500 to $323.5300.
  13. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $323.5600 to $324.5500.
  14. F14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.6100 to $325.5500.
  15. F15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $325.6800 to $326.5800.
  16. F16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.9000 to $327.8600.
  17. F17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.9800 to $328.9400.
  18. F18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.3200 to $329.5400.
Shares sold 20,000 shares Open-market sales of common stock on June 1, 2026
Price range of sales $312.6400–$329.5400 per share Weighted average price ranges disclosed in multiple footnotes
Direct holdings after sales 8,807,290 shares Common stock directly owned by CEO after June 1, 2026 trades
Indirect trust holdings 167,125 shares Shares held as trustee of an irrevocable trust for his child
Rule 10b5-1 plan adoption date February 26, 2026 Trading plan governing the reported sales
Number of sale transactions 16 transactions Non-derivative open-market sale entries on June 1, 2026
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.
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.
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.
non-derivative financial
"transaction_type: "non-derivative""

FAQ

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

What insider transaction did VICR CEO Patrizio Vinciarelli report on June 1, 2026?
VICR CEO Patrizio Vinciarelli reported selling 20,000 shares of Vicor common stock on June 1, 2026. The transactions were open-market sales executed in multiple trades at weighted average prices within stated price ranges around the low to mid-$300s per share.

At what prices did VICR CEO Vinciarelli sell his 20,000 Vicor shares?
The 20,000 Vicor shares were sold at weighted average prices across several trades, with ranges from $312.6400 to $329.5400 per share. Each Form 4 line reflects an average price, with footnotes clarifying the detailed transaction price ranges within those bands.

How many Vicor (VICR) shares does the CEO hold after the reported sales?
After the reported sales, CEO Patrizio Vinciarelli directly holds 8,807,290 Vicor common shares. He also indirectly holds 167,125 additional shares as trustee of the Patrizio Vinciarelli Irrevocable Trust established for the benefit of his child, according to the Form 4 footnotes.

Were the June 1, 2026 Vicor (VICR) insider sales made under a Rule 10b5-1 plan?
Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026. Such pre-arranged plans schedule trades in advance, reducing the significance of day-to-day market timing decisions by the insider.

Does the VICR Form 4 show any remaining derivative or option positions for the CEO?
The Form 4’s derivative summary is empty, indicating no derivative transactions such as options or convertible securities were reported in this filing. Only non-derivative common stock sales and an updated indirect holding as trustee of an irrevocable trust appear in the disclosed data.

What indirect Vicor (VICR) holdings does CEO Patrizio Vinciarelli report?
Vinciarelli reports indirect ownership of 167,125 Vicor shares held as trustee of the Patrizio Vinciarelli Irrevocable Trust U/A dated December 21, 2012. The trust was established for the benefit of his child, and these shares are reported separately from his direct holdings.

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

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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)
06/01/2026		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 Stock06/01/2026S(2)800D$313.0488(3)8,807,290D
Common Stock06/01/2026S(2)800D$313.985(4)8,806,490D
Common Stock06/01/2026S(2)1,200D$315.0625(5)8,805,290D
Common Stock06/01/2026S(2)1,822D$316.2064(6)8,803,468D
Common Stock06/01/2026S(2)900D$317.4252(7)8,802,568D
Common Stock06/01/2026S(2)1,713D$318.5845(8)8,800,855D
Common Stock06/01/2026S(2)700D$319.5029(9)8,800,155D
Common Stock06/01/2026S(2)100D$320.16(10)8,800,055D
Common Stock06/01/2026S(2)1,767D$321.9307(11)8,798,288D
Common Stock06/01/2026S(2)1,437D$323.2778(12)8,796,851D
Common Stock06/01/2026S(2)1,598D$324.1038(13)8,795,253D
Common Stock06/01/2026S(2)2,026D$325.1937(14)8,793,227D
Common Stock06/01/2026S(2)1,100D$325.9797(15)8,792,127D
Common Stock06/01/2026S(2)1,000D$327.216(16)8,791,127D
Common Stock06/01/2026S(2)2,637D$328.5763(17)8,788,490D
Common Stock06/01/2026S(2)400D$329.4225(18)8,788,090D
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 $312.6400 to $313.3800. 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 (18) 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 $313.6400 to $314.5800.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $314.6500 to $315.4700.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.6900 to $316.6300.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $316.9600 to $317.6700.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $318.1000 to $318.9400.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.1400 to $320.1300.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.1600 to $320.1600.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $321.4500 to $322.3700.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $322.5500 to $323.5300.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $323.5600 to $324.5500.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.6100 to $325.5500.
15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $325.6800 to $326.5800.
16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.9000 to $327.8600.
17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.9800 to $328.9400.
18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.3200 to $329.5400.
/s/Quentin A. Fendelet Attorney in Fact for Patrizio Vinciarelli06/02/2026
** 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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