[Form 4] VICOR CORP Insider Trading Activity

Vicor Corp Chairman and CEO Patrizio Vinciarelli exercised stock options to acquire additional common shares.

Rhea-AI Filing Summary

Vicor Corp Chairman and CEO Patrizio Vinciarelli exercised stock options to acquire additional common shares. On 2026-04-14, he exercised non qualified stock options for 3,455 shares at an exercise price of $41.61 per share and 1,372 shares at $60.61 per share, converting them into common stock.

Following these exercises, his direct common stock holdings increased to 8,945,090 shares. The filing also shows an additional 171,125 common shares held indirectly through the Patrizio Vinciarelli Irrevocable Trust established for the benefit of his child, where he is Trustee.

Insider Trade Summary

4,827 shares exercised/converted

Exercise 5 txns

Insider VINCIARELLI PATRIZIO

Role Chairman and CEO

Type	Security	Shares	Price	Value
Exercise	Non Qualified Stock Option	3,455	$0.00	$0.00
Exercise	Non Qualified Stock Option	1,372	$0.00	$0.00
Exercise	Common Stock	3,455	$41.61	$144K
Exercise	Common Stock	1,372	$60.61	$83K
holding	Common Stock	--	--	--

Holdings After Transaction: Non Qualified Stock Option — 17,931 contracts (Direct); Common Stock — 8,945,090 shares (Direct); Common Stock — 171,125 shares (Indirect, See footnote)

Footnotes (3)

1. F1. These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person.
2. F2. Options granted on 5/2/2023, vest over five years and expire two years from each vesting date.
3. F3. Options granted on 4/25/2022, vest over five years and expire two years from each vesting date.

Key Figures

Options exercised at $41.61: 3,455 shares Options exercised at $60.61: 1,372 shares Total shares from exercises: 4,827 shares +3 more

6 metrics

Options exercised at $41.61 3,455 shares Non qualified stock option exercise on 2026-04-14 at $41.61

Options exercised at $60.61 1,372 shares Non qualified stock option exercise on 2026-04-14 at $60.61

Total shares from exercises 4,827 shares Exercise or conversion of derivative securities reported in transactionSummary

Direct common shares after transactions 8,945,090 shares Total direct Vicor common stock holdings following transactions

Indirect trust holdings 171,125 shares Common stock held via Patrizio Vinciarelli Irrevocable Trust U/A 12/21/2012

Derivative exercises count 2 transactions Exercise or conversion of derivative securities in transactionSummary

Key Terms

Non Qualified Stock Option, derivative exercise/conversion, indirect ownership, Irrevocable Trust, +1 more

5 terms

Non Qualified Stock Option financial

"security_title: "Non Qualified Stock Option" for derivative transactions"

derivative exercise/conversion financial

"transaction_action: "derivative exercise/conversion" describing option exercises"

indirect ownership financial

"ownership_type: "indirect" and nature_of_ownership: "See footnote""

Irrevocable Trust financial

"Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012"

An irrevocable trust is a legal arrangement where an owner transfers assets into a separate entity managed by a trustee and gives up the power to modify or reclaim those assets. For investors it matters because putting stock or other holdings into such a trust can change who controls and benefits from the assets, affect taxes and creditor protection, and influence how easy it is to sell or value those holdings—like placing valuables in a locked safe overseen by someone else.

exercise price financial

"conversion_or_exercise_price values of 41.6100 and 60.6100"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

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

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Accepted by SEC EDGAR 04/15/2026 - 04:06 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).

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^*

VINCIARELLI PATRIZIO

(Last) (First) (Middle)

C/O VICOR CORPORATION

25 FRONTAGE ROAD

(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	X	10% Owner
X	Officer (give title below)		Other (specify below)
	Chairman and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/14/2026

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								171,125	I	See footnote(1)
Common Stock	04/14/2026		M		3,455	A	$41.61	8,943,718	D
Common Stock	04/14/2026		M		1,372	A	$60.61	8,945,090	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	$41.61	04/14/2026		M			3,455	05/02/2024(2)	05/02/2026	Common Stock	3,455	$0	13,818	D
Non Qualified Stock Option	$60.61	04/14/2026		M			1,372	04/25/2024(3)	04/25/2026	Common Stock	1,372	$0	4,113	D

Explanation of Responses:

1. These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person.

2. Options granted on 5/2/2023, vest over five years and expire two years from each vesting date.

3. Options granted on 4/25/2022, vest over five years and expire two years from each vesting date.

	/s/Quentin A. Fendelet. Attorney in fact for Patrizio Vinciarelli	04/15/2026
	** 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)