Vicor Corp Insider Reports Ownership Change

TL;DR

Vicor insider Patrizio Vinciareili changed his stock ownership on 3/20/26.

AI Summary

On March 20, 2026, Patrizio Vinciareili, a reporting person for VICOR CORP, reported a change in beneficial ownership of securities. The filing details transactions related to this change.

Why It Matters

This filing indicates a change in the holdings of a key individual within Vicor Corp, which could signal their confidence or strategy regarding the company's stock.

Risk Assessment

Risk Level: low — Form 4 filings typically report routine changes in insider holdings and do not inherently signal significant risk.

Key Players & Entities

• VICOR CORP (company) — Issuer
• VINCIARELLI PATRIZIO (person) — Reporting Person
• 0000751978 (company) — CIK for VICOR CORP
• 0000901484 (person) — CIK for VINCIARELLI PATRIZIO

FAQ

Key Financial Figures

• $174.1100 — ple transactions at prices ranging from $174.1100 to $175.0700. The reporting person unde
• $175.0700 — ons at prices ranging from $174.1100 to $175.0700. The reporting person undertakes to pro
• $175.2800 — ple transactions at prices ranging from $175.2800 to $176.1900. 5. The price reported in
• $176.1900 — ons at prices ranging from $175.2800 to $176.1900. 5. The price reported in Column 4 is
• $177.2100 — ple transactions at prices ranging from $177.2100 to $178.2000. 6. The price reported in
• $178.2000 — ons at prices ranging from $177.2100 to $178.2000. 6. The price reported in Column 4 is
• $178.2100 — ple transactions at prices ranging from $178.2100 to $179.2000. 7. The price reported in
• $179.2000 — ons at prices ranging from $178.2100 to $179.2000. 7. The price reported in Column 4 is
• $179.2300 — ple transactions at prices ranging from $179.2300 to $180.1700. 8. The price reported in
• $180.1700 — ons at prices ranging from $179.2300 to $180.1700. 8. The price reported in Column 4 is
• $180.3000 — ple transactions at prices ranging from $180.3000 to $181.2700. 9. The price reported in
• $181.2700 — ons at prices ranging from $180.3000 to $181.2700. 9. The price reported in Column 4 is
• $181.3600 — ple transactions at prices ranging from $181.3600 to $182.2000. 10. The price reported i
• $182.2000 — ons at prices ranging from $181.3600 to $182.2000. 10. The price reported in Column 4 is
• $182.3900 — ple transactions at prices ranging from $182.3900 to $182.9100. 11. The price reported i

Filing Documents

• ownership.html (4)
• ownership.xml (4) — 22KB
• 0001193125-26-119264.txt ( ) — 24KB

From the Filing

SEC FORM 4 SEC Form 4 FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 RD. (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) X Director X 10% Owner X Officer (give title below) Other (specify below) Chairman and CEO 2a. Foreign Trading Symbol 3. Date of Earliest Transaction (Month/Day/Year) 03/20/2026 6. Individual or Joint/Group Filing (Check Applicable Line) X Form 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) Code V Amount (A) or (D) Price Common Stock 171,125 I See Footnote (1) Common Stock 03/20/2026 S (2) 4,766 D $ 174.6395 (3) 9,103,397 D Common Stock 03/20/2026 S (2) 3,010 D $ 176.0011 (4) 9,100,387 D Common Stock 03/20/2026 S (2) 4,680 D $ 177.8709 (5) 9,095,707 D Common Stock 03/20/2026 S (2) 13,126 D $ 178.7527 (6) 9,082,581 D Common Stock 03/20/2026 S (2) 2,579 D $ 179.7247 (7) 9,080,002 D Common Stock 03/20/2026 S (2) 2,201 D $ 180.6218 (8) 9,077,801 D Common Stock 03/20/2026 S (2) 4,656 D $ 181.7139 (9) 9,073,145 D Common Stock 03/20/2026 S (2) 1,958 D $ 182.6354 (10) 9,071,187 D Common Stock 03/20/2026 S (2) 1,500 D $ 184.668 (11) 9,069,687 D Common Stock 03/20/2026 S (2) 3,999 D $ 186.2712 (12) 9,065,688 D Common Stock 03/20/2026 S (2) 1,101 D $ 187.4259 (13) 9,064,587 D Common Stock 03/20/2026 S (2) 500 D $ 188.89 (14) 9,064,087 D 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) Code V (A) (D) Date Exercisable Expiration Date Title Amount 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 November 3, 2025. 3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $174.1100 to $175.0700. 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 (14) 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 $175.2800 to $176.1900. 5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.2100 to $178.2000. 6. The price reported in Column 4 is a weighted average price. These shares were

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