Were the VICR share sales open-market transactions or private deals?

The Form 4 classifies each stock sale as an open-market transaction, using transaction code "S" with the description "Sale in open market or private transaction." Footnotes add that prices were reported as weighted averages over multiple trades.

What does the net share change indicate in this VICR insider filing?

The transaction summary shows 504 shares sold and 504 shares acquired through option exercise, resulting in net-sell activity of 504 shares. Common Stock holdings dropped to zero, while option holdings increased to 10,016 Non Qualified Stock Options.

Vicor (VICR) director exercises options, then sells 504 shares

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Vicor Corp director Andrew D'Amico reported an exercise-and-sell transaction in company stock. On 2026-05-26, he exercised options to acquire 504 shares of Common Stock at an exercise price of $50.0000 per share, then sold 504 shares in a series of open-market transactions.

The reported sales totaled 504 shares of Common Stock at weighted average prices ranging from $320.0000 to $324.5000 per share, according to footnotes. Following these transactions, his directly held Common Stock position is reported as 0 shares, while 10,016 Non Qualified Stock Options remain outstanding after the exercise.

Insider Trade Summary

Net Seller: 504 shares ($162,562)

Net Sell 6 txns

Insider D'Amico Andrew

Role null

Sold 504 shs ($163K)

Type	Security	Shares	Price	Value
Exercise	Non Qualified Stock Option	504	$0.00	--
Exercise	Common Stock	504	$50.00	$25K
Sale	Common Stock	75	$320.08	$24K
Sale	Common Stock	75	$321.51	$24K
Sale	Common Stock	303	$323.1056	$98K
Sale	Common Stock	51	$324.3551	$17K

Holdings After Transaction: Non Qualified Stock Option — 10,016 shares (Direct, null); Common Stock — 504 shares (Direct, null)

Footnotes (1)

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.0000 to $320.1200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $321.5100 to $321.5100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $323.0000 to $323.3700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.2100 to $324.5000. Options expire 2 years from each date of vesting.

Key Figures

Shares sold: 504 shares Sale prices: $320.0000–$324.5000/share Option exercise price: $50.0000/share +3 more

6 metrics

Shares sold 504 shares Total Common Stock sold on 2026-05-26 across four open-market trades

Sale prices $320.0000–$324.5000/share Weighted average price ranges from trade footnotes on 2026-05-26

Option exercise price $50.0000/share Exercise price for 504 underlying Common Stock shares

Shares acquired via exercise 504 shares Common Stock from option exercise on 2026-05-26

Common shares after transaction 0 shares Directly held Common Stock position reported post-transactions

Options remaining 10,016 options Non Qualified Stock Options outstanding after the reported exercise

Key Terms

open-market sale, Non Qualified Stock Option, weighted average price, derivative exercise/conversion, +1 more

5 terms

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.

Non Qualified Stock Option financial

"security_title": "Non Qualified Stock Option""

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

derivative exercise/conversion financial

"transaction_action": "derivative exercise/conversion""

Options expire 2 years from each date of vesting financial

"Options expire 2 years from each date of vesting."

Form 4 Insider Transactions: What Each Field Means →

05/27/2026 - 03:41 PM

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^*

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)
05/26/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/26/2026		M		504	A	$50	504	D
Common Stock	05/26/2026		S		75	D	$320.08⁽¹⁾	429	D
Common Stock	05/26/2026		S		75	D	$321.51⁽²⁾	354	D
Common Stock	05/26/2026		S		303	D	$323.1056⁽³⁾	51	D
Common Stock	05/26/2026		S		51	D	$324.3551⁽⁴⁾	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Non Qualified Stock Option	$50	05/26/2026		M			504	05/02/2026	⁽⁵⁾	Common Stock	504	$0	10,016	D

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.0000 to $320.1200.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $321.5100 to $321.5100.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $323.0000 to $323.3700.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $324.2100 to $324.5000.

5. Options expire 2 years from each date of vesting.

	/s/Quentin A. Fendelet Attorney in fact for Andrew D'Amico	05/27/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Andrew D'Amico report at VICR?

Andrew D'Amico reported exercising options for 504 Vicor Corp shares and selling 504 Common Stock shares in open-market transactions on 2026-05-26. The filing shows this as a combined derivative exercise and sale pattern.

How many VICR shares did the director sell and at what prices?

The director sold 504 shares of Vicor Corp Common Stock in several trades. Weighted average sale prices ranged from $320.0000 to $324.5000 per share, based on detailed price ranges disclosed in the footnotes.

What options did Andrew D'Amico exercise in this VICR Form 4?

He exercised Non Qualified Stock Options covering 504 underlying shares of Vicor Corp Common Stock at an exercise price of $50.0000 per share on 2026-05-26. A related footnote states these options expire two years from each vesting date.

What are Andrew D'Amico’s VICR holdings after the reported transactions?

After these transactions, the filing reports 0 directly held shares of Vicor Corp Common Stock. It also shows 10,016 Non Qualified Stock Options remaining outstanding, providing ongoing exposure through derivative securities rather than directly owned shares.