VICOR director exercises options, sells 800 shares

VICOR CORP director Andrew D'Amico reported an exercise-and-sale transaction involving 800 shares of Common Stock.

Rhea-AI Filing Summary

VICOR CORP director Andrew D'Amico reported an exercise-and-sale transaction involving 800 shares of Common Stock. He exercised a Non Qualified Stock Option for 800 shares at $60.61 per share and on the same date sold 800 shares in an open-market transaction at $277.00 per share. Following the sale, his directly held Common Stock position reported in this filing was 0 shares. The sale was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on September 12, 2024, indicating the timing was set in advance.

Insider Trade Summary 10b5-1

Exercise and Sale: 800 shares ($173K approx. pre-tax spread)

Exercise and Sale 3 txns

Insider D'Amico Andrew

Role Director

Sold 800 shs ($222K)

Approx. gross sale proceeds $222K

Approx. exercise cost $48K

Approx. pre-tax spread $173K

Type	Security	Shares	Price	Value
Exercise	Non Qualified Stock Option	800	$0.00	$0.00
Exercise	Common Stock	800	$60.61	$48K
Sale	Common Stock	800	$277.00	$222K

Holdings After Transaction: Non Qualified Stock Option — 800 contracts (Direct); Common Stock — 0 shares (Direct)

Footnotes (1)

1. F1. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.

Key Figures

Shares sold: 800 shares Sale price: $277.00 per share Options exercised: 800 shares +3 more

6 metrics

Shares sold 800 shares Common Stock open-market sale on 2026-04-27

Sale price <money>$277.00</money> per share Common Stock sale price on 2026-04-27

Options exercised 800 shares Non Qualified Stock Option exercise on 2026-04-27

Exercise price <money>$60.61</money> per share Non Qualified Stock Option strike price

Common shares after sale 0 shares Total Common Stock directly held following transactions

Rule 10b5-1 adoption date <date>September 12, 2024</date> Adoption date of trading plan used for the sale

Key Terms

Rule 10b5-1 trading plan, Non Qualified Stock Option, open-market sale, derivative security

4 terms

Rule 10b5-1 trading plan regulatory

"This sale was effected pursuant to a Rule 10b5-1 trading plan adopted..."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Non Qualified Stock Option financial

"security_title: "Non Qualified Stock Option" for 800.0000 underlying shares"

open-market sale financial

"transaction_action: "open-market sale" for 800.0000 Common Stock shares"

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 security financial

"transaction_code_description: "Exercise or conversion of derivative security""

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did VICR director Andrew D'Amico report on this Form 4?

Andrew D'Amico reported exercising options for 800 VICOR CORP shares and selling 800 Common Stock shares in an open-market transaction. This exercise-and-sale pattern converts an option position into cash while leaving no directly held Common Stock reported after the transaction.

At what prices did Andrew D'Amico exercise and sell VICR shares?

He exercised a Non Qualified Stock Option at a strike price of $60.61 per share and sold 800 Common Stock shares at $277.00 per share. These figures show the cost basis from the option and the market price at which the shares were sold.

How many VICR shares did Andrew D'Amico hold after these transactions?

After the reported transactions, Andrew D'Amico’s directly held Common Stock position in this filing is 0 shares. The Form 4 indicates total shares of Common Stock following the open-market sale were 0, meaning no direct Common Stock holding is shown post-transaction.

Were Andrew D'Amico’s VICR share sales under a Rule 10b5-1 trading plan?

Yes. A footnote states the sale was effected under a Rule 10b5-1 trading plan adopted on September 12, 2024. Such plans are pre-arranged, meaning the trade timing was scheduled in advance rather than decided at the moment of sale.

What type of derivative security did Andrew D'Amico exercise for VICR?

He exercised a Non Qualified Stock Option covering 800 underlying shares of Common Stock at a conversion or exercise price of $60.61 per share. This converted an option-based position into 800 shares prior to the same-day open-market sale.

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

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Accepted by SEC EDGAR 04/28/2026 - 02:05 PM EDT Learn about SEC filing dates

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).

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^*

D'Amico Andrew

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/27/2026

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	04/27/2026		M		800	A	$60.61	800	D
Common Stock	04/27/2026		S(1)		800	D	$277	0	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	$60.61	04/27/2026		M			800	04/25/2026	04/25/2028	Common Stock	800	$0	800	D

Explanation of Responses:

1. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.

	/s/Kemble D. Morrison Attorney in fact for Andrew D'Amico	04/28/2026
	** 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)