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Vicor (VICR) CEO Vinciarelli sells 20,000 shares under Rule 10b5-1 plan

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 Vicor common stock on July 2, 2026. The shares were sold in numerous small trades at weighted average prices generally between $308.50 and $350.56, as detailed in the price-range footnotes.

Following these transactions, he directly holds 8,366,737 Vicor common shares. He also has indirect ownership of 167,125 shares held in an irrevocable trust for the benefit of his child, where he serves as trustee. The filing notes that the sales were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on February 26, 2026, indicating the timing of the trades was established in advance.

Positive

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Negative

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Insights

CEO’s 20,000-share sale is small versus his total stake and executed under a pre-set plan.

Patrizio Vinciarelli, Vicor’s Chairman, CEO, and more-than-10% holder, sold 20,000 common shares on July 2, 2026 through multiple open-market trades. Prices spanned roughly $308.50 to $350.56, reflecting execution across an intraday trading range.

After the sales, he still directly owns 8,366,737 shares and indirectly oversees 167,125 shares in an irrevocable trust for his child. Relative to these holdings, the transactions represent a small fraction of his visible stake in Vicor.

The filing specifies the sales were executed under a Rule 10b5-1 trading plan adopted on February 26, 2026. Such pre-arranged plans are designed to systematize selling activity and reduce the informational significance of trade timing. Future company filings may further clarify any additional activity under this plan.

Insider VINCIARELLI PATRIZIO
Role Chairman & CEO
Sold 20,000 shs ($6.38M)
Type Security Shares Price Value
Sale Common Stock 1,353 $309.1498 $418K
Sale Common Stock 2,071 $310.1304 $642K
Sale Common Stock 4,184 $310.8178 $1.30M
Sale Common Stock 3,992 $311.9897 $1.25M
Sale Common Stock 500 $313.0525 $157K
Sale Common Stock 1,300 $314.6885 $409K
Sale Common Stock 400 $315.285 $126K
Sale Common Stock 200 $318.855 $64K
Sale Common Stock 200 $321.0438 $64K
Sale Common Stock 600 $323.0167 $194K
Sale Common Stock 200 $324.205 $65K
Sale Common Stock 600 $328.2933 $197K
Sale Common Stock 240 $331.4998 $80K
Sale Common Stock 960 $332.9941 $320K
Sale Common Stock 500 $334.402 $167K
Sale Common Stock 200 $335.4021 $67K
Sale Common Stock 100 $338.17 $34K
Sale Common Stock 200 $339.75 $68K
Sale Common Stock 503 $341.6507 $172K
Sale Common Stock 297 $342.9447 $102K
Sale Common Stock 200 $344.64 $69K
Sale Common Stock 372 $346.6285 $129K
Sale Common Stock 428 $347.4393 $149K
Sale Common Stock 400 $350.535 $140K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 8,366,737 shares (Direct, null); Common Stock — 167,125 shares (Indirect, See Footnote)
Footnotes (1)
  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. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.5000 and $309.4950. 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 (26) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $309.5000 and $310.4900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $310.5000 and $311.4900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $311.5000 and $312.2800. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $312.6700 and $313.4850. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.9700 and $314.8700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.2800 and $315.2900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $318.8400 and $318.8700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.9800 and $321.4500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $322.6200 and $323.2100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.1900 and $324.2200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.1800 and $328.5000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.3400 and $332.2700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.4300 and $333.3700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.1500 and $335.0000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.3100 and $335.5000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.1700 and $338.1700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.4900 and $340.0600. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.4400 and $342.3300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.5400 and $343.1300. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $344.6200 and $344.6600. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $346.3200 and $347.0100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $347.3200 and $347.7000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $350.5200 and $350.5600.
Shares sold 20,000 shares Total common shares sold on July 2, 2026
Direct holdings after sale 8,366,737 shares Common stock directly owned post-transaction
Indirect trust holdings 167,125 shares Shares held in Patrizio Vinciarelli Irrevocable Trust
Highest reported sale price $350.56/share Upper end of price range in one footnote
Lowest reported sale price $308.50/share Lower end of price range in one footnote
Example weighted average price $350.535/share Weighted average for one group of transactions
Example weighted average price $309.1498/share Weighted average for another transaction group
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. These shares were sold in multiple transactions…"
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
"These shares are 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.
more-than-10% owner regulatory
"reporting person is marked as is_ten_percent_owner: 1, indicating a more-than-10% owner status."
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Form 4 Insider Transactions: What Each Field Means →

FAQ

How many Vicor (VICR) shares did CEO Patrizio Vinciarelli sell in this Form 4?
Patrizio Vinciarelli reported selling 20,000 shares of Vicor common stock. The transactions occurred in many small open-market trades on July 2, 2026, as shown in the Form 4’s non-derivative transaction table and summarized in the transaction totals.

What prices did Vicor (VICR) shares sell for in Vinciarelli’s July 2, 2026 transactions?
The reported sale prices are weighted averages for multiple trades. Footnotes state the individual trades occurred in ranges generally between $308.50 and $350.56 per share, with detailed sub-ranges for each transaction line on the Form 4.

How many Vicor (VICR) shares does CEO Patrizio Vinciarelli hold after this Form 4?
After the reported sales, Vinciarelli directly holds 8,366,737 Vicor common shares. He also has indirect ownership of 167,125 shares through an irrevocable trust for his child, where he serves as trustee, as described in the Form 4 footnotes.

Were the Vicor (VICR) insider share sales made under a Rule 10b5-1 plan?
Yes. A footnote explains the July 2, 2026 sales were effected under a Rule 10b5-1 trading plan adopted on February 26, 2026. Such plans pre-schedule trades, which helps separate transaction timing from day-to-day discretionary decisions.

What indirect Vicor (VICR) holdings are reported for Vinciarelli in this Form 4?
The Form 4 shows 167,125 Vicor shares held indirectly. A footnote states these shares are owned by the Patrizio Vinciarelli Irrevocable Trust, created in 2012 for his child’s benefit, with Vinciarelli serving as trustee of the trust.
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)
07/02/2026		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 Stock07/02/2026S(2)1,353D$309.1498(3)8,366,737D
Common Stock07/02/2026S(2)2,071D$310.1304(4)8,364,666D
Common Stock07/02/2026S(2)4,184D$310.8178(5)8,360,482D
Common Stock07/02/2026S(2)3,992D$311.9897(6)8,356,490D
Common Stock07/02/2026S(2)500D$313.0525(7)8,355,990D
Common Stock07/02/2026S(2)1,300D$314.6885(8)8,354,690D
Common Stock07/02/2026S(2)400D$315.285(9)8,354,290D
Common Stock07/02/2026S(2)200D$318.855(10)8,354,090D
Common Stock07/02/2026S(2)200D$321.0438(11)8,353,890D
Common Stock07/02/2026S(2)600D$323.0167(12)8,353,290D
Common Stock07/02/2026S(2)200D$324.205(13)8,353,090D
Common Stock07/02/2026S(2)600D$328.2933(14)8,352,490D
Common Stock07/02/2026S(2)240D$331.4998(15)8,352,250D
Common Stock07/02/2026S(2)960D$332.9941(16)8,351,290D
Common Stock07/02/2026S(2)500D$334.402(17)8,350,790D
Common Stock07/02/2026S(2)200D$335.4021(18)8,350,590D
Common Stock07/02/2026S(2)100D$338.17(19)8,350,490D
Common Stock07/02/2026S(2)200D$339.75(20)8,350,290D
Common Stock07/02/2026S(2)503D$341.6507(21)8,349,787D
Common Stock07/02/2026S(2)297D$342.9447(22)8,349,490D
Common Stock07/02/2026S(2)200D$344.64(23)8,349,290D
Common Stock07/02/2026S(2)372D$346.6285(24)8,348,918D
Common Stock07/02/2026S(2)428D$347.4393(25)8,348,490D
Common Stock07/02/2026S(2)400D$350.535(26)8,348,090D
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 $308.5000 and $309.4950. 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 (26) 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 $309.5000 and $310.4900.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $310.5000 and $311.4900.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $311.5000 and $312.2800.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $312.6700 and $313.4850.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.9700 and $314.8700.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.2800 and $315.2900.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $318.8400 and $318.8700.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.9800 and $321.4500.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $322.6200 and $323.2100.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.1900 and $324.2200.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $328.1800 and $328.5000.
15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $331.3400 and $332.2700.
16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $332.4300 and $333.3700.
17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.1500 and $335.0000.
18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $335.3100 and $335.5000.
19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $338.1700 and $338.1700.
20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $339.4900 and $340.0600.
21. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $341.4400 and $342.3300.
22. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $342.5400 and $343.1300.
23. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $344.6200 and $344.6600.
24. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $346.3200 and $347.0100.
25. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $347.3200 and $347.7000.
26. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $350.5200 and $350.5600.
/s/Quentin A. Fendelet Attorney in Fact for Patrizio Vinciarelli07/06/2026
** 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