[Form 4] Vicor Corp Insider Trading Activity

Rhea-AI Filing Summary

Samuel J. Anderson, a director of Vicor Corp (VICR), reported option-related transactions dated 08/11/2025. The filing shows acquisition of 2,073 non-qualified stock options in three tranches: 1,217, 644, and 212 options with exercise prices of $32.89, $31.05, and $47.15, respectively. Following the reported transactions, Anderson's reported beneficial ownership of common stock is 5,864 shares.

The explanatory section states the options were originally granted on 6/21/2024, 6/28/2019, and 6/15/2018 under the company's Amended and Restated 2000 Stock Option and Incentive Plan and vest over a five-year period. The form was signed by Kemble D. Morrison as attorney-in-fact for Samuel J. Anderson on 08/13/2025.

Positive

• Disclosure completeness: The Form 4 lists exercise prices, grant dates and vesting terms for all option tranches.
• Alignment: Director received 2,073 options, which aligns his compensation with equity performance under the company plan.

Negative

• Potential dilution: Up to 2,073 shares could be issued if all reported options are exercised.
• Deferred realization: Vesting schedules span multiple years, delaying the director's ability to realize economic value from the awards.

Insights

Securities Analyst

Director Anderson received 2,073 options; beneficial ownership rose to 5,864 shares—routine compensation with limited immediate market impact.

The Form 4 discloses three non-qualified stock option tranches acquired on 08/11/2025 totaling 2,073 options with exercise prices of $32.89, $31.05 and $47.15. The filing shows the director's beneficial ownership at 5,864 shares following these transactions. From a securities perspective, these are standard equity awards to an insider and, in isolation, do not indicate a material change to the company's capital structure. The disclosure of exercise prices, grant dates and vesting terms supports transparent reporting.

Corporate Governance Expert

Grants were made under the company equity plan with five-year vesting; governance disclosure appears standard and procedurally complete.

The explanations state the options were granted under Vicor's Amended and Restated 2000 Stock Option and Incentive Plan with vesting over five years for grants dated 6/21/2024, 6/28/2019 and 6/15/2018. The Form 4 is signed by an attorney-in-fact, indicating proper execution. These elements are consistent with routine director compensation practices and provide the necessary transparency on grant mechanics and timelines.

SEC Form 4

FORM 4

UNITED 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
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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 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^*

ANDERSON SAMUEL J

(Last) (First) (Middle)

25 FRONTAGE ROAD

(Street)

ANDOVER MA 01810

(City) (State) (Zip)

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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2025

4. If Amendment, Date of 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

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	08/11/2025		M		1,217	A	$32.89	5,008	D
Common Stock	08/11/2025		M		644	A	$31.05	5,652	D
Common Stock	08/11/2025		M		212	A	$47.15	5,864	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
Non Qualified Stock Option	$32.89	08/11/2025		M			1,217	(1)	06/21/2034	Common Stock	1,217	$0	4,864	D
Non Qualified Stock Option	$31.05	08/11/2025		M			644	(2)	06/28/2029	Common Stock	644	$0	0	D
Non Qualified Stock Option	$47.15	08/11/2025		M			212	(3)	06/15/2028	Common Stock	212	$0	0	D

Explanation of Responses:

1. Granted on 6/21/2024 under the Companys Amended and Restated 2000 Stock Option and Incentive Plan and vest over a five year period.

2. Granted on 6/28/2019 under the Companys Amended and Restated 2000 Stock Option and Incentive Plan and vest over a five year period.

3. Granted on 6/15/2018 under the Companys Amended and Restated 2000 Stock Option and Incentive Plan and vest over a five year period.

	/s/Kemble D. Morrison Attorney in fact for Samuel J. Anderson	08/13/2025
	** Signature of Reporting Person	Date
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.

FAQ

What insider transaction did Samuel J. Anderson (VICR) report on 08/11/2025?

He reported acquisition of 2,073 non-qualified stock options in three tranches (1,217; 644; 212) on 08/11/2025.

How many shares does Samuel J. Anderson beneficially own after the reported transactions?

Following the reported transactions, Anderson's reported beneficial ownership is 5,864 shares of common stock.

What are the exercise prices and exercisable/expiration details for the options reported by Anderson?

The reported exercise prices are $32.89 (1,217 options), $31.05 (644 options) and $47.15 (212 options). The filing lists exercisable/expiration dates associated with each tranche as provided in the derivative table.

When were the option grants originally made and what are the vesting terms?

The explanations state grants were made on 6/21/2024, 6/28/2019 and 6/15/2018 under the company plan and vest over a five-year period.

Who signed the Form 4 for Samuel J. Anderson and when?

The form was signed by Kemble D. Morrison as attorney-in-fact for Samuel J. Anderson on 08/13/2025.