Vicor (VICR) GM sells 18,618 shares after exercising options

Rhea-AI Filing Summary

Vicor Corp director and General Manager of Manufacturing Operations Michael McNamara reported a series of option exercises paired with share sales. He exercised options to acquire 18,618 shares of common stock through multiple transactions and sold 18,618 shares in open-market sales at $309.00 per share. Following these transactions, he holds 18,185 shares of Vicor common stock directly. Footnotes state the options were granted under the company’s Amended and Restated 2000 Stock Option and Incentive Plan and vest over a five year period.

Insider Trade Summary

Net Seller: 18,618 shares ($5,752,962)

Net Sell 9 txns

Insider McNamara Michael

Role General Manager Mfg. Ops.

Sold 18,618 shs ($5.75M)

Type	Security	Shares	Price	Value
Exercise	Non Qualified Stock Option	1,516	$0.00	--
Exercise	Non Qualified Stock Option	7,102	$0.00	--
Exercise	Non Qualified Stock Option	10,000	$0.00	--
Exercise	Common Stock	1,516	$75.43	$114K
Sale	Common Stock	1,516	$309.00	$468K
Exercise	Common Stock	7,102	$33.96	$241K
Sale	Common Stock	7,102	$309.00	$2.19M
Exercise	Common Stock	10,000	$69.04	$690K
Sale	Common Stock	10,000	$309.00	$3.09M

Holdings After Transaction: Non Qualified Stock Option — 758 shares (Direct, null); Common Stock — 19,701 shares (Direct, null)

Footnotes (1)

1. Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on May 12, 2021 and vest over a five year period. Options expire two years from each vest date. Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on May 3, 2024 and vest over a five year period. Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on June 24, 2020 and vest over a five year period.

Key Figures

Shares sold: 18,618 shares Sale price per share: $309.00/share Shares exercised: 18,618 shares +4 more

7 metrics

Shares sold 18,618 shares Total open-market sales of common stock on 2026-05-11

Sale price per share $309.00/share Price for reported open-market sales of common stock

Shares exercised 18,618 shares Total shares acquired via option exercises on 2026-05-11

Post-transaction holdings 18,185 shares Common stock held directly after transactions

Option exercise price $69.04/share Exercise price for one lot of non-qualified stock options

Option exercise price $33.96/share Exercise price for another lot of non-qualified stock options

Option exercise price $75.43/share Exercise price for additional non-qualified stock options

Key Terms

Non Qualified Stock Option, open-market sale, derivative exercise/conversion, Amended and Restated 2000 Stock Option and Incentive Plan, +1 more

5 terms

Non Qualified Stock Option financial

"security_title: "Non Qualified Stock Option""

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

derivative exercise/conversion financial

"transaction_action: "derivative exercise/conversion""

Amended and Restated 2000 Stock Option and Incentive Plan financial

"Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan"

vest over a five year period financial

"and vest over a five year period."

Form 4 Insider Transactions: What Each Field Means →

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^*

McNamara Michael

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Manager Mfg. Ops.

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026

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	05/11/2026		M		1,516	A	$75.43	19,701	D
Common Stock	05/11/2026		S		1,516	D	$309	18,185	D
Common Stock	05/11/2026		M		7,102	A	$33.96	25,287	D
Common Stock	05/11/2026		S		7,102	D	$309	18,185	D
Common Stock	05/11/2026		M		10,000	A	$69.04	28,185	D
Common Stock	05/11/2026		S		10,000	D	$309	18,185	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	$75.43	05/11/2026		M			1,516	(1)	(2)	Common Stock	1,516	$0	758	D
Non Qualified Stock Option	$33.96	05/11/2026		M			7,102	(3)	(2)	Common Stock	7,102	$0	10,651	D
Non Qualified Stock Option	$69.04	05/11/2026		M			10,000	(4)	06/24/2030	Common Stock	10,000	$0	0	D

Explanation of Responses:

1. Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on May 12, 2021 and vest over a five year period.

2. Options expire two years from each vest date.

3. Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on May 3, 2024 and vest over a five year period.

4. Granted under the Companys Amended and Restated 2000 Stock Option and Incentive Plan on June 24, 2020 and vest over a five year period.

	/s/Kemble D. Morrison Attorney in fact for Michael McNamara	05/12/2026
	** 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)

FAQ

What insider transactions did Michael McNamara report at VICR?

Michael McNamara reported exercising options for 18,618 Vicor shares and selling 18,618 shares in open-market transactions at $309.00 per share. These paired exercise-and-sell moves are compensation-related and documented in his Form 4 filing.

At what price did the VICR insider sell common stock shares?

The insider’s reported open-market sales occurred at $309.00 per Vicor common share. These sales followed option exercises that converted derivative awards into common stock before being sold at this disclosed market price.

How many VICR shares does Michael McNamara hold after these transactions?

After the reported option exercises and matching share sales, Michael McNamara directly holds 18,185 shares of Vicor common stock. This post-transaction balance is specified in the Form 4 transaction details for his direct ownership.

What type of equity awards did the VICR insider exercise?

He exercised non-qualified stock options that converted into Vicor common stock. The options carried exercise prices such as $69.04, $33.96, and $75.43 per share, reflecting different award grants under the company’s stock option and incentive plan.

Under which plan were Michael McNamara’s VICR options granted?

Footnotes state the options were granted under Vicor’s Amended and Restated 2000 Stock Option and Incentive Plan. These awards vest over a five year period and provided the derivative securities that were exercised into common shares on the reported date.