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Vicor CEO sells 20,000 shares in planned trade

Vicor Corporation Chairman and CEO Patrizio Vinciarelli reported open-market sales of 20,000 shares of Vicor common stock on June 8, 2026.

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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 8, 2026. The shares were sold in multiple transactions at weighted average prices between $261.74 and $277.61, under a Rule 10b5-1 trading plan adopted on February 26, 2026. Following these sales, he directly owns 8,688,090 shares and indirectly holds 167,125 shares as trustee of an irrevocable trust for his child.

Insider VINCIARELLI PATRIZIO
Role Chairman and CEO
Sold 20,000 shs ($5.42M)
Share of Position Sold 0.23%
Type Security Shares Price Value
Sale Common Stock 600 $261.815 $157K
Sale Common Stock 900 $263.0567 $237K
Sale Common Stock 800 $264.5763 $212K
Sale Common Stock 1,400 $265.245 $371K
Sale Common Stock 400 $266.7352 $107K
Sale Common Stock 300 $267.6867 $80K
Sale Common Stock 640 $269.5705 $173K
Sale Common Stock 2,260 $270.6558 $612K
Sale Common Stock 2,958 $271.8096 $804K
Sale Common Stock 4,002 $272.7702 $1.09M
Sale Common Stock 3,140 $273.6792 $859K
Sale Common Stock 1,600 $274.6008 $439K
Sale Common Stock 600 $275.4167 $165K
Sale Common Stock 400 $277.61 $111K
Holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 8,688,090 shares (Direct); Common Stock — 167,125 shares (Indirect, See footnote)
Holdings Before and After: Common Stock, 8,708,090 to 8,688,090 shares (Direct)
Other Insiders: 12 other insiders reported open-market sales of this stock in the 30 days up to this filing.
Footnotes (16)
  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 $261.7400 to $261.9300. 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 (16) 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 $262.8000 to $263.3300.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $264.0100 to $265.0000.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $265.0500 to $265.4800.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $266.3200 to $266.8800.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $267.6700 to $267.7200.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $269.2100 to $270.2000.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.2600 to $271.2500.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.2600 to $272.2300.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.2700 to $273.2600.
  13. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.2700 to $274.2400.
  14. F14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.2700 to $275.1000.
  15. F15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.2700 to $275.5000.
  16. F16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $277.6100 to $277.6100.
Shares sold 20,000 shares Total non-derivative open-market sales on June 8, 2026
Sale price range $261.74–$277.61 per share Weighted average price ranges across reported trades
Direct holdings after sale 8,707,490 shares Common stock directly owned following transactions
Indirect trust holdings 167,125 shares Held as trustee of irrevocable trust for reporting person’s child
Number of sale transactions 14 transactions Non-derivative open-market or private sales
Trading plan adoption date February 26, 2026 Date Rule 10b5-1 plan was adopted
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
"Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person."
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.
greater-than-10% owner regulatory
"is_ten_percent_owner: 1"

FAQ

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

How many VICR shares did Patrizio Vinciarelli sell in this Form 4?
Patrizio Vinciarelli sold 20,000 shares of Vicor common stock. The sales were reported as 14 separate open-market transactions on June 8, 2026, according to the Form 4 transaction summary.

What price range did the VICR insider sales occur at on June 8, 2026?
The Vicor insider sales occurred at weighted average prices between $261.74 and $277.61 per share. Multiple trades were executed within narrower ranges disclosed in the footnotes to the Form 4.

Was the VICR insider sale by Patrizio Vinciarelli under a 10b5-1 plan?
Yes. The Form 4 states the sale was effected under a Rule 10b5-1 trading plan adopted by Patrizio Vinciarelli on February 26, 2026, indicating the sale was pre-arranged.

How many VICR shares does Patrizio Vinciarelli own after these transactions?
After the reported sales, Patrizio Vinciarelli directly owns 8,707,490 shares of Vicor common stock. He also indirectly holds 167,125 shares as trustee of an irrevocable trust for his child.

What roles does Patrizio Vinciarelli hold at Vicor Corporation (VICR)?
Patrizio Vinciarelli is identified as Chairman and CEO of Vicor Corporation and also a greater-than-10% owner. These capacities are disclosed in the reporting person details of the Form 4.

How many insider sale transactions were reported in this VICR Form 4?
The Form 4 reports 14 non-derivative open-market sale transactions of Vicor common stock on June 8, 2026. It also includes one entry showing indirect holdings through a trust.

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)
06/08/2026		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 Stock06/08/2026S(2)600D$261.815(3)8,707,490D
Common Stock06/08/2026S(2)900D$263.0567(4)8,706,590D
Common Stock06/08/2026S(2)800D$264.5763(5)8,705,790D
Common Stock06/08/2026S(2)1,400D$265.245(6)8,704,390D
Common Stock06/08/2026S(2)400D$266.7352(7)8,703,990D
Common Stock06/08/2026S(2)300D$267.6867(8)8,703,690D
Common Stock06/08/2026S(2)640D$269.5705(9)8,703,050D
Common Stock06/08/2026S(2)2,260D$270.6558(10)8,700,790D
Common Stock06/08/2026S(2)2,958D$271.8096(11)8,697,832D
Common Stock06/08/2026S(2)4,002D$272.7702(12)8,693,830D
Common Stock06/08/2026S(2)3,140D$273.6792(13)8,690,690D
Common Stock06/08/2026S(2)1,600D$274.6008(14)8,689,090D
Common Stock06/08/2026S(2)600D$275.4167(15)8,688,490D
Common Stock06/08/2026S(2)400D$277.61(16)8,688,090D
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 $261.7400 to $261.9300. 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 (16) 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 $262.8000 to $263.3300.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $264.0100 to $265.0000.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $265.0500 to $265.4800.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $266.3200 to $266.8800.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $267.6700 to $267.7200.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $269.2100 to $270.2000.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.2600 to $271.2500.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.2600 to $272.2300.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.2700 to $273.2600.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.2700 to $274.2400.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.2700 to $275.1000.
15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.2700 to $275.5000.
16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $277.6100 to $277.6100.
/s/Quentin A. Fendelet. Attorney in fact for Patrizio Vinciarelli06/09/2026
** 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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