VICOR CORP Insider Trading Activity

Vicor Corp corporate vice president Alex Gusinov reported a routine compensation-related equity update.

Accepted by SEC EDGAR 05/06/2026 - 03:39 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Vicor Corp corporate vice president Alex Gusinov reported a routine compensation-related equity update. He received a grant of non-qualified stock options covering 2,633 shares of Vicor common stock at an exercise price of $266.0050 per share, granted under the company’s Amended and Restated 2000 Stock Option and Incentive Plan. According to the filing, these options were granted on May 5, 2026 and vest over a five-year period, with each portion expiring two years after its vesting date. Following the reported transactions, Gusinov holds 7,491 shares of Vicor common stock directly, which include 495 shares acquired under the Vicor Corporation 2017 Employee Stock Purchase Plan on February 27, 2026.

Insider Trade Summary

Grant/Award: 2,633 shares

Grant/Award 1 txn

Insider Gusinov Alex

Role Corp. Vice President

Type	Security	Shares	Price	Value
Grant/Award	Non Qualified Stock Option	2,633	$0.00	$0.00
Holding	Common Stock	--	--	--

Holdings After Transaction: Non Qualified Stock Option — 2,633 contracts (Direct); Common Stock — 7,491 shares (Direct)

Holdings Before and After: Non Qualified Stock Option, 0 to 2,633 contracts (Direct)

Footnotes (3)

1. F1. Includes 495 shares acquired under the Vicor Corporation 2017 Employee Stock Purchase Plan on February 27 2026.
2. F2. Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on May 5, 2026 and vest over a five year period.
3. F3. Options expire 2 years from each vesting date.

Key Figures

Options granted: 2,633 options Exercise price: $266.0050 per share Shares owned after transaction: 7,491 shares +3 more

6 metrics

Options granted 2,633 options Non-qualified stock options on May 5, 2026

Exercise price $266.0050 per share Non-qualified stock options linked to common stock

Shares owned after transaction 7,491 shares Direct holdings of Vicor common stock after reported update

ESPP shares included 495 shares Acquired under 2017 Employee Stock Purchase Plan on February 27, 2026

Derivative transactions count 1 transaction Non-qualified stock option grant reported in Form 4

Holding entries 1 entry Common stock holding line with 7,491 shares following transaction

Key Terms

Non Qualified Stock Option, Amended and Restated 2000 Stock Option and Incentive Plan, Employee Stock Purchase Plan, non-qualified stock options

4 terms

Non Qualified Stock Option financial

"security_title: "Non Qualified Stock Option""

Amended and Restated 2000 Stock Option and Incentive Plan financial

"Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on May 5, 2026"

Employee Stock Purchase Plan financial

"Includes 495 shares acquired under the Vicor Corporation 2017 Employee Stock Purchase Plan on February 27 2026"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

non-qualified stock options financial

"He received a grant of non-qualified stock options covering 2,633 shares of Vicor common stock"

Non-qualified stock options are a type of employee benefit that gives individuals the right to buy company shares at a set price, usually lower than the market value, within a certain period. Unlike other options that may have special tax advantages, these options are taxed as income when exercised, which can affect how much money the employee or investor ultimately gains. They are important because they can influence company compensation strategies and impact the financial outcomes for employees and investors.

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

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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
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).

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^*

Gusinov Alex

(Last) (First) (Middle)

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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Corp. Vice President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/05/2026

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								7,491(1)	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	$266.005	05/05/2026		A		2,633		(2)	(3)	Common Stock	2,633	$0	2,633	D

Explanation of Responses:

1. Includes 495 shares acquired under the Vicor Corporation 2017 Employee Stock Purchase Plan on February 27 2026.

2. Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on May 5, 2026 and vest over a five year period.

3. Options expire 2 years from each vesting date.

	/s/ Kemble D. Morrison Attorney in fact for Alex Gusinov	05/06/2026
	** 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.
* Form 4: SEC 1474 (03-26)