STOCK TITAN
  1. Home
  2. Sec-filings
  3. VICR
  4. [Form 4] VICOR CORP Insider Trading Activity

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

VICOR CORP Chairman and CEO Patrizio Vinciarelli reported open-market sales of 20,000 shares of common stock on May 28, 2026.

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

Rhea-AI Filing Summary

VICOR CORP Chairman and CEO Patrizio Vinciarelli reported open-market sales of 20,000 shares of common stock on May 28, 2026. The sales were executed in 19 separate transactions at weighted average prices within ranges from about $328.10 to $350.43, as detailed in the filing.

The transactions were effected pursuant to a pre-arranged Rule 10b5-1 trading plan adopted on February 26, 2026. Following these sales, Vinciarelli directly holds 8,828,090 shares of VICOR CORP common stock and indirectly holds 167,125 shares as trustee of an irrevocable trust established for the benefit of his child.

Positive

  • None.

Negative

  • None.
Insider VINCIARELLI PATRIZIO
Role Chairman and CEO
Sold 20,000 shs ($6.84M)
Type Security Shares Price Value
Sale Common Stock 600 $328.3733 $197K
Sale Common Stock 400 $330.25 $132K
Sale Common Stock 900 $333.4761 $300K
Sale Common Stock 700 $334.3086 $234K
Sale Common Stock 420 $335.7637 $141K
Sale Common Stock 1,303 $336.6774 $439K
Sale Common Stock 477 $337.9609 $161K
Sale Common Stock 1,000 $339.024 $339K
Sale Common Stock 600 $340.2517 $204K
Sale Common Stock 1,049 $341.3245 $358K
Sale Common Stock 2,756 $342.4912 $944K
Sale Common Stock 1,795 $343.1585 $616K
Sale Common Stock 1,300 $344.4492 $448K
Sale Common Stock 530 $345.531 $183K
Sale Common Stock 1,670 $346.5091 $579K
Sale Common Stock 1,700 $347.4478 $591K
Sale Common Stock 2,400 $348.5783 $837K
Sale Common Stock 200 $349.175 $70K
Sale Common Stock 200 $350.42 $70K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 8,828,090 shares (Direct); Common Stock — 167,125 shares (Indirect, See footnote)
Footnotes (21)
  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 $328.1000 to $328.7100. 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 (21) 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 $330.1800 to $330.3800.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.7800 to $333.7500.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.7900 to $334.6800.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.2600 to $336.2100.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.2800 to $337.2400.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $337.4000 to $338.3300.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.5700 to $339.5400.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.6200 to $340.6100.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $340.7000 to $341.6800.
  13. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.7300 to $342.7200.
  14. F14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.7400 to $343.5200.
  15. F15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $344.0200 to $344.8600.
  16. F16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $345.0200 to $346.0100.
  17. F17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $346.0300 to $346.8750.
  18. F18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $347.0400 to $347.9800.
  19. F19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $348.0700 to $349.0200.
  20. F20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $349.1500 to $349.2000.
  21. F21. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $350.4100 to $350.4300.
Shares sold 20,000 shares Open-market sales on May 28, 2026
Lowest price range $328.10/share Footnote price range low for that day
Highest price range $350.43/share Footnote price range high for that day
Direct holdings after sale 8,847,490 shares Common stock held directly after May 28, 2026 trades
Indirect trust holdings 167,125 shares Held as trustee of irrevocable trust
Sale transactions 19 transactions Number of open-market sale entries on May 28, 2026
Rule 10b5-1 trading plan financial
"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.
Irrevocable Trust U/A financial
"Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person."
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.
indirect ownership financial
"ownership_type": "indirect""

FAQ

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

What insider transaction did VICR Chairman and CEO Patrizio Vinciarelli report?
Patrizio Vinciarelli reported selling 20,000 VICR common shares. The Form 4 shows 19 open-market sale transactions on May 28, 2026, totaling 20,000 shares of Vicor Corporation common stock at various weighted average prices within specified intraday ranges.

At what prices did Patrizio Vinciarelli sell VICR shares on May 28, 2026?
The reported sales occurred between about $328.10 and $350.43 per share. Footnotes describe multiple weighted average sale prices, with individual trades executed in ranges spanning from $328.10 at the low end up to $350.43 at the high end that day.

How many VICR shares does Patrizio Vinciarelli own after the reported sales?
After the transactions, Vinciarelli directly holds 8,847,490 VICR shares. In addition, he indirectly holds 167,125 shares as trustee of the Patrizio Vinciarelli Irrevocable Trust U/A dated 12/21/2012, which was established for the benefit of his child.

Were the May 28, 2026 VICR insider sales under a Rule 10b5-1 plan?
Yes, the sales were made under a Rule 10b5-1 trading plan. A footnote states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026, indicating the transactions were pre-arranged rather than opportunistic.

Does Patrizio Vinciarelli hold VICR shares indirectly through a trust?
Yes, he holds VICR shares indirectly as trustee of an irrevocable trust. The filing notes 167,125 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 his child.

How many sale transactions did VICR’s CEO report on May 28, 2026?
The Form 4 shows 19 separate sale transactions that day. Each transaction involves Vicor Corporation common stock sold in the open market, with different weighted average prices and price ranges, collectively amounting to 20,000 shares sold on May 28, 2026.

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

Form 4 Insider Transactions: What Each Field Means →
See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google
Add on Google
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)
05/28/2026		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 Stock05/28/2026S(2)600D$328.3733(3)8,847,490D
Common Stock05/28/2026S(2)400D$330.25(4)8,847,090D
Common Stock05/28/2026S(2)900D$333.4761(5)8,846,190D
Common Stock05/28/2026S(2)700D$334.3086(6)8,845,490D
Common Stock05/28/2026S(2)420D$335.7637(7)8,845,070D
Common Stock05/28/2026S(2)1,303D$336.6774(8)8,843,767D
Common Stock05/28/2026S(2)477D$337.9609(9)8,843,290D
Common Stock05/28/2026S(2)1,000D$339.024(10)8,842,290D
Common Stock05/28/2026S(2)600D$340.2517(11)8,841,690D
Common Stock05/28/2026S(2)1,049D$341.3245(12)8,840,641D
Common Stock05/28/2026S(2)2,756D$342.4912(13)8,837,885D
Common Stock05/28/2026S(2)1,795D$343.1585(14)8,836,090D
Common Stock05/28/2026S(2)1,300D$344.4492(15)8,834,790D
Common Stock05/28/2026S(2)530D$345.531(16)8,834,260D
Common Stock05/28/2026S(2)1,670D$346.5091(17)8,832,590D
Common Stock05/28/2026S(2)1,700D$347.4478(18)8,830,890D
Common Stock05/28/2026S(2)2,400D$348.5783(19)8,828,490D
Common Stock05/28/2026S(2)200D$349.175(20)8,828,290D
Common Stock05/28/2026S(2)200D$350.42(21)8,828,090D
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 $328.1000 to $328.7100. 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 (21) 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 $330.1800 to $330.3800.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.7800 to $333.7500.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $333.7900 to $334.6800.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.2600 to $336.2100.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $336.2800 to $337.2400.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $337.4000 to $338.3300.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.5700 to $339.5400.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.6200 to $340.6100.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $340.7000 to $341.6800.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.7300 to $342.7200.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.7400 to $343.5200.
15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $344.0200 to $344.8600.
16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $345.0200 to $346.0100.
17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $346.0300 to $346.8750.
18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $347.0400 to $347.9800.
19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $348.0700 to $349.0200.
20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $349.1500 to $349.2000.
21. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $350.4100 to $350.4300.
/s/Quentin A. Fendelet Attorney in Fact for Patrizio Vinciarelli05/29/2026
** 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

Keep reading

More on VICR

Trending in the feed

Open the live feed