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Vicor CEO Vinciarelli Sells 20,000 Shares Under Plan

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

Rhea-AI Filing Summary

Vicor Corp Chairman & CEO Patrizio Vinciarelli reported selling 20,000 shares of common stock on June 25, 2026 in multiple open-market or private transactions at weighted-average prices between $322.2000 and $342.5100, under a Rule 10b5-1 trading plan adopted on February 26, 2026. After these sales he holds 8,448,090 Vicor shares directly and 167,125 shares indirectly through an irrevocable trust established for his child.

Positive

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Negative

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Insights

Vicor’s CEO sold 20,000 shares under a pre-planned Rule 10b5-1 program, while retaining a very large position.

Patrizio Vinciarelli, Vicor’s Chairman, CEO and a more-than-10% holder, reported selling 20,000 common shares on June 25, 2026 in 15 open-market trades. Reported prices span the low-to-mid $300 range, with individual weighted-average prices up to about $342.51 per share.

The filing states the sales were made pursuant to a Rule 10b5-1 trading plan adopted on February 26, 2026. Such plans are pre-arranged and executed automatically, which generally indicates a structured diversification or liquidity program rather than ad hoc timing decisions.

Following these transactions, Vinciarelli still holds 8,467,090 shares directly and 167,125 shares indirectly as trustee of an irrevocable trust. In proportion to these reported holdings, the 20,000 shares sold appear modest, so the disclosure mainly updates investors on incremental, planned selling activity rather than signaling a major change in insider ownership.

Insider VINCIARELLI PATRIZIO
Role Chairman & CEO
Sold 20,000 shs ($6.61M)
Type Security Shares Price Value
Sale Common Stock 1,000 $322.7385 $323K
Sale Common Stock 1,187 $325.2074 $386K
Sale Common Stock 824 $326.4548 $269K
Sale Common Stock 1,289 $327.2649 $422K
Sale Common Stock 1,423 $328.2016 $467K
Sale Common Stock 1,477 $329.463 $487K
Sale Common Stock 1,973 $330.4272 $652K
Sale Common Stock 3,293 $331.2117 $1.09M
Sale Common Stock 1,904 $332.3016 $633K
Sale Common Stock 3,035 $333.1873 $1.01M
Sale Common Stock 1,357 $334.2486 $454K
Sale Common Stock 238 $335.1805 $80K
Sale Common Stock 300 $336.2363 $101K
Sale Common Stock 600 $338.0733 $203K
Sale Common Stock 100 $342.51 $34K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 8,448,090 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 $322.2000 and $323.0500. 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 $324.8000 and $325.7900.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $325.8000 and $326.6700.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.8000 and $327.6500.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.8100 and $328.6100.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.8300 and $329.7600.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.8600 and $330.8100.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $330.8700 and $331.8400.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.8900 and $332.8700.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.9300 and $333.6500.
  13. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.9700 and $334.6800.
  14. F14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.0000 and $335.2200.
  15. F15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.0500 and $336.4900.
  16. F16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.0400 and $338.0900.
  17. F17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.5100 and $342.5100.
Shares sold 20,000 shares Total Vicor common shares sold by Patrizio Vinciarelli on June 25, 2026
Price range $322.2000–$342.5100 Weighted-average sale prices across multiple transactions on June 25, 2026
Direct holdings after sale 8,448,090 shares Vicor common shares held directly by Patrizio Vinciarelli after reported transactions
Indirect trust holdings 167,125 shares Vicor common shares held indirectly via irrevocable trust for the reporting person’s child
10b5-1 plan adoption February 26, 2026 Date Vinciarelli adopted the Rule 10b5-1 trading plan governing these sales
Number of sale transactions 15 Count of non-derivative sale entries reported in the Form 4
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
"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.

FAQ

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

How many VICR shares did CEO Patrizio Vinciarelli sell in this Form 4?
He sold 20,000 Vicor common shares on June 25, 2026 in multiple open-market or private transactions. These were reported as non-derivative dispositions executed under a pre-arranged Rule 10b5-1 trading plan adopted on February 26, 2026.

At what prices were VICR shares sold by Vicor CEO Patrizio Vinciarelli?
The reported per-share prices are weighted averages ranging from about $322.2000 to $342.5100 across 15 sale entries. Footnotes state each price aggregates multiple trades within narrower ranges and that detailed breakdowns are available upon request.

What VICR shareholdings does Patrizio Vinciarelli have after these reported sales?
After the transactions, he holds 8,448,090 Vicor common shares directly, according to the canonical holdings data. He also has 167,125 shares held indirectly as trustee of an irrevocable trust established for the benefit of his child.

Was the VICR insider selling done under a Rule 10b5-1 trading plan?
Yes. A footnote explains the sale was effected under a Rule 10b5-1 trading plan adopted on February 26, 2026, and the filing’s plan affirmation box is checked. This indicates the trades were made pursuant to a pre-arranged schedule rather than discretionary timing.

Does this VICR Form 4 show any option exercises or derivative transactions?
No derivative transactions or option exercises are reported. The transaction summary lists a derivative transaction count of 0 and exercise shares of 0, while all 15 reported transactions involve sales of non-derivative Vicor common stock.

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)
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 & CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/25/2026		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 Stock06/25/2026S(2)1,000D$322.7385(3)8,467,090D
Common Stock06/25/2026S(2)1,187D$325.2074(4)8,465,903D
Common Stock06/25/2026S(2)824D$326.4548(5)8,465,079D
Common Stock06/25/2026S(2)1,289D$327.2649(6)8,463,790D
Common Stock06/25/2026S(2)1,423D$328.2016(7)8,462,367D
Common Stock06/25/2026S(2)1,477D$329.463(8)8,460,890D
Common Stock06/25/2026S(2)1,973D$330.4272(9)8,458,917D
Common Stock06/25/2026S(2)3,293D$331.2117(10)8,455,624D
Common Stock06/25/2026S(2)1,904D$332.3016(11)8,453,720D
Common Stock06/25/2026S(2)3,035D$333.1873(12)8,450,685D
Common Stock06/25/2026S(2)1,357D$334.2486(13)8,449,328D
Common Stock06/25/2026S(2)238D$335.1805(14)8,449,090D
Common Stock06/25/2026S(2)300D$336.2363(15)8,448,790D
Common Stock06/25/2026S(2)600D$338.0733(16)8,448,190D
Common Stock06/25/2026S(2)100D$342.51(17)8,448,090D
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 $322.2000 and $323.0500. 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 $324.8000 and $325.7900.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $325.8000 and $326.6700.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $326.8000 and $327.6500.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $327.8100 and $328.6100.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.8300 and $329.7600.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $329.8600 and $330.8100.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $330.8700 and $331.8400.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.8900 and $332.8700.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.9300 and $333.6500.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.9700 and $334.6800.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.0000 and $335.2200.
15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.0500 and $336.4900.
16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.0400 and $338.0900.
17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.5100 and $342.5100.
/s/Quentin A. Fendelet Attorney in Fact for Patrizio Vinciarelli06/29/2026
** 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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