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Vicor CEO sells 20,000 shares under 10b5-1 plan

Vicor Corporation Chairman and CEO Patrizio Vinciarelli reported open-market sales of 20,000 shares of Vicor common stock on June 5, 2026.

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 5, 2026. The 21 separate sale transactions were executed at weighted average prices within ranges from about $265.89 to $288.51 per share, as detailed in the pricing footnotes.

These sales were made pursuant to a pre-arranged Rule 10b5-1 trading plan adopted on February 26, 2026. Following the transactions, Vinciarelli holds 8,708,090 Vicor shares directly. He also reports indirect ownership of 167,125 shares as trustee of the Patrizio Vinciarelli Irrevocable Trust established for the benefit of his child.

Positive

  • None.

Negative

  • None.
Insider VINCIARELLI PATRIZIO
Role Chairman and CEO
Sold 20,000 shs ($5.53M)
Type Security Shares Price Value
Sale Common Stock 1,000 $266.282 $266K
Sale Common Stock 800 $267.3775 $214K
Sale Common Stock 900 $268.4295 $242K
Sale Common Stock 800 $269.3738 $215K
Sale Common Stock 1,416 $270.3738 $383K
Sale Common Stock 1,084 $271.443 $294K
Sale Common Stock 1,000 $272.8797 $273K
Sale Common Stock 1,457 $274.1178 $399K
Sale Common Stock 1,343 $275.0588 $369K
Sale Common Stock 600 $276.3973 $166K
Sale Common Stock 900 $277.46 $250K
Sale Common Stock 1,300 $278.6729 $362K
Sale Common Stock 945 $280.219 $265K
Sale Common Stock 2,255 $281.3249 $634K
Sale Common Stock 1,000 $282.40 $282K
Sale Common Stock 915 $283.7548 $260K
Sale Common Stock 957 $284.7206 $272K
Sale Common Stock 347 $285.638 $99K
Sale Common Stock 892 $286.6161 $256K
Sale Common Stock 83 $287.6182 $24K
Sale Common Stock 6 $288.5067 $2K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 8,708,090 shares (Direct); Common Stock — 167,125 shares (Indirect, See footnote)
Footnotes (23)
  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 $265.8900 to $266.7000. 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 (23) 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 $266.9800 to $267.7200.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $268.0000 to $268.9900.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $269.0100 to $270.0000.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.0400 to $271.0300.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.0500 to $271.8300.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.2500 to $273.2100.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.6900 to $274.6700.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.7500 to $275.2900.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $276.0000 to $276.8800.
  13. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $277.0100 to $278.0000.
  14. F14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $278.1900 to $279.1700.
  15. F15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $279.9700 to $280.9300.
  16. F16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $280.9900 to $281.6800.
  17. F17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $282.0600 to $282.9100.
  18. F18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $283.1600 to $284.0000.
  19. F19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $284.2000 to $285.1600.
  20. F20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $285.2000 to $286.1200.
  21. F21. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $286.3800 to $287.3700.
  22. F22. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.4200 to $288.0000.
  23. F23. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $288.5000 to $288.5100.
Shares sold 20,000 shares Total Vicor common shares sold on June 5, 2026
Number of sale transactions 21 transactions Non-derivative open-market sales of common stock
Lowest price range $265.8900/share Lowest end of disclosed sale price ranges
Highest price range $288.5100/share Highest end of disclosed sale price ranges
Direct holdings after sale 8,727,090 shares Vicor common stock held directly post-transaction
Indirect trust holdings 167,125 shares Shares held as trustee of irrevocable trust
Trading plan adoption date February 26, 2026 Rule 10b5-1 plan governing reported 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 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.
Irrevocable Trust financial
"held by the reporting person as Trustee of the 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 Chairman and CEO report on this Form 4?
The Chairman and CEO reported selling 20,000 shares of Vicor common stock in open-market transactions. These 21 sales occurred on June 5, 2026, and are recorded at weighted average prices across several narrow price ranges disclosed in the footnotes.

At what prices did the VICR insider sell the 20,000 shares?
The 20,000 shares were sold at weighted average prices within ranges from about $265.89 to $288.51 per share. Each row reflects a weighted average, with detailed price ranges for the underlying trades described in multiple pricing footnotes.

How many VICR shares does the insider hold after these sales?
After the June 5, 2026 sales, the reporting person holds 8,727,090 Vicor common shares directly. In addition, he reports indirect ownership of 167,125 shares held as trustee of an irrevocable trust established for the benefit of his child.

Was the VICR insider sale made under a Rule 10b5-1 trading 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, which can make the timing of these insider sales more routine rather than discretionary.

How many separate sale transactions are reported for the VICR insider?
The filing shows 21 non-derivative sale transactions in Vicor common stock on June 5, 2026. Each transaction line reflects a portion of the total 20,000 shares sold, with its own weighted average sale price and resulting post-transaction share balance.

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)
06/05/2026		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 Stock06/05/2026S(2)1,000D$266.282(3)8,727,090D
Common Stock06/05/2026S(2)800D$267.3775(4)8,726,290D
Common Stock06/05/2026S(2)900D$268.4295(5)8,725,390D
Common Stock06/05/2026S(2)800D$269.3738(6)8,724,590D
Common Stock06/05/2026S(2)1,416D$270.3738(7)8,723,174D
Common Stock06/05/2026S(2)1,084D$271.443(8)8,722,090D
Common Stock06/05/2026S(2)1,000D$272.8797(9)8,721,090D
Common Stock06/05/2026S(2)1,457D$274.1178(10)8,719,633D
Common Stock06/05/2026S(2)1,343D$275.0588(11)8,718,290D
Common Stock06/05/2026S(2)600D$276.3973(12)8,717,690D
Common Stock06/05/2026S(2)900D$277.46(13)8,716,790D
Common Stock06/05/2026S(2)1,300D$278.6729(14)8,715,490D
Common Stock06/05/2026S(2)945D$280.219(15)8,714,545D
Common Stock06/05/2026S(2)2,255D$281.3249(16)8,712,290D
Common Stock06/05/2026S(2)1,000D$282.4(17)8,711,290D
Common Stock06/05/2026S(2)915D$283.7548(18)8,710,375D
Common Stock06/05/2026S(2)957D$284.7206(19)8,709,418D
Common Stock06/05/2026S(2)347D$285.638(20)8,709,071D
Common Stock06/05/2026S(2)892D$286.6161(21)8,708,179D
Common Stock06/05/2026S(2)83D$287.6182(22)8,708,096D
Common Stock06/05/2026S(2)6D$288.5067(23)8,708,090D
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 $265.8900 to $266.7000. 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 (23) 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 $266.9800 to $267.7200.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $268.0000 to $268.9900.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $269.0100 to $270.0000.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.0400 to $271.0300.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.0500 to $271.8300.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.2500 to $273.2100.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.6900 to $274.6700.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.7500 to $275.2900.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $276.0000 to $276.8800.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $277.0100 to $278.0000.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $278.1900 to $279.1700.
15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $279.9700 to $280.9300.
16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $280.9900 to $281.6800.
17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $282.0600 to $282.9100.
18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $283.1600 to $284.0000.
19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $284.2000 to $285.1600.
20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $285.2000 to $286.1200.
21. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $286.3800 to $287.3700.
22. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.4200 to $288.0000.
23. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $288.5000 to $288.5100.
/s/Kemble D. Morrison Attorney in fact for Patrizio Vinciarelli06/08/2026
** 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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