Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Schmidt James F 2. Issuer Name and Ticker or Trading Symbol VICOR CORP [VICR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) CFO, Treasurer, Secretary (Last) (First) (Middle) 25 FRONTAGE ROAD 3. Date of Earliest Transaction (Month/Day/Year) 06/22/2026 (Street) ANDOVER, MA 01810 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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 06/22/2026 M 1,216 A $32.89 1,216 D Common Stock 06/22/2026 M 908 A $44.07 2,124 D Common Stock 06/22/2026 S(1) 145 D $351.38(2) 1,979 D Common Stock 06/22/2026 S(1) 45 D $354.11(3) 1,934 D Common Stock 06/22/2026 S(1) 90 D $356.485(4) 1,844 D Common Stock 06/22/2026 S(1) 435 D $357.6951(5) 1,409 D Common Stock 06/22/2026 S(1) 145 D $359.84(6) 1,264 D Common Stock 06/22/2026 S(1) 280 D $360.9464(7) 984 D Common Stock 06/22/2026 S(1) 480 D $362.5288(8) 504 D Common Sock 06/22/2026 S(1) 190 D $363.9721(9) 314 D Common Stock 06/22/2026 S(1) 169 D $365.1195(10) 145 D Common Stock 06/22/2026 S(1) 145 D $367.061(11) 0 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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 of Derivative Security: 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

Non Qualified Stock Option

$365.53

06/22/2026

A

548

(12)

06/22/2036

Common Stock

548

$ 0

548

D

Non Qualified Stock Option

$32.89

06/22/2026

M

1,216

06/21/2026

06/21/2034

Common Stock

1,216

$ 0

3,648

D

Non Qualified Stock Option

$44.07

06/22/2026

M

908

06/20/2026

06/20/2035

Common Stock

908

$ 0

3,631

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Schmidt James F 25 FRONTAGE ROAD ANDOVER, MA 01810	X		CFO, Treasurer, Secretary

Signatures

/s/Quentin A. Fendelet Attorney in Fact for James Schmidt		06/23/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 10, 2025.
(2)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $351.3800 to $351.3800.
(3)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $354.1100 to $354.1100
(4)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $356.3000 to $356.6700.
(5)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $357.5000 to $357.9700.
(6)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $359.5700 to $360.4400
(7)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $360.5800 to $361.2000.
(8)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $362.1100 to $363.0900.
(9)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $363.7800 to $364.4800.
(10)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $365.0300 to $365.8000.
(11)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $366.9300 to $367.1200
(12)	Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on June 22, 2026 and vest over a five year period.

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