Vicor (VICR) VP Davies sells 5,419 shares, exercises options

Rhea-AI Filing Summary

Vicor Corp VP Philip D. Davies reported option exercises and share sales. On March 5, 2026, he exercised several non-qualified stock options, acquiring common shares at exercise prices including $41.6100, $60.6100, and $75.4300 per share.

That same day, he sold 5,419 shares of Vicor common stock in multiple open-market transactions under a Rule 10b5-1 trading plan adopted on November 21, 2025, at weighted average prices ranging from $177.1800 to $202.2600. Following these transactions, he directly owned 1,920 shares of common stock and held option positions including 15,358, 7,752, and 1,827 option shares in separate grants.

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^*

Davies Philip D

(Last) (First) (Middle)

25 FRONTAGE RD.

(Street)

ANDOVER MA 01810

(City) (State) (Zip)

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)
	VP Global Sales & Marketing

3. Date of Earliest Transaction (Month/Day/Year)
03/05/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	03/05/2026		M		1,920	A	$41.61	3,840	D
Common Stock	03/05/2026		M		2,585	A	$60.61	6,425	D
Common Stock	03/05/2026		M		914	A	$75.43	7,339	D
Common Stock	03/05/2026		S(1)		100	D	$177.18(2)	7,239	D
Common Stock	03/05/2026		S(1)		700	D	$179.3814(3)	6,539	D
Common Stock	03/05/2026		S(1)		607	D	$180.2373(4)	5,932	D
Common Stock	03/05/2026		S(1)		698	D	$181.4881(5)	5,234	D
Common Stock	03/05/2026		S(1)		100	D	$182.17(6)	5,134	D
Common Stock	03/05/2026		S(1)		100	D	$185.51(7)	5,034	D
Common Stock	03/05/2026		S(1)		300	D	$187.2567(8)	4,734	D
Common Stock	03/05/2026		S(1)		300	D	$189.2067(9)	4,434	D
Common Stock	03/05/2026		S(1)		300	D	$193.12(10)	4,134	D
Common Stock	03/05/2026		S(1)		300	D	$194.98(11)	3,834	D
Common Stock	03/05/2026		S(1)		100	D	$196.45(12)	3,734	D
Common Stock	03/05/2026		S(1)		1,514	D	$199.4874(13)	2,220	D
Common Stock	03/05/2026		S(1)		300	D	$202.1833(14)	1,920	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	03/05/2026		M			1,920	05/02/2025	(15)	Common Stock	1,920	$0	15,358	D
Non Qualified Stock Option	$60.61	03/05/2026		M			2,585	04/25/2025	(15)	Common Stock	2,585	$0	7,752	D
Non Qualified Stock Option	$75.43	03/05/2026		M			914	05/12/2025	(15)	Common Stock	914	$0	1,827	D

Explanation of Responses:

1. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.1800 to $177.1800.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $178.7900 to $179.7700.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $180.0500 to $181.0100.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $181.1600 to $181.9400.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.1700 to $182.1700.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.5100 to $185.5100.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.9200 to $187.8800.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.0600 to $189.4800.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $192.9800 to $193.1900

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $194.9500 to $195.0000.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $196.4500 to $196.4500.

13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $199.4200 to $199.7200.

14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $202.1100 to $202.2600

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

	/s/Quentin A. Fendelet Attorney in fact for Philip D. Davies	03/05/2026
	** 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.

FAQ

What insider transactions did Vicor (VICR) executive Philip D. Davies report?

Philip D. Davies reported exercising non-qualified stock options and selling Vicor common shares. On March 5, 2026, he converted several option grants into stock, then executed multiple open-market sales the same day under a pre-established Rule 10b5-1 trading plan.

How many Vicor (VICR) shares did Philip D. Davies sell in this Form 4?

Philip D. Davies sold a total of 5,419 Vicor common shares. These were executed as multiple open-market transactions on March 5, 2026, at weighted average prices disclosed in the filing, all under a Rule 10b5-1 trading plan adopted on November 21, 2025.

What is notable about the prices for Philip D. Davies’ Vicor (VICR) stock sales?

The reported sale prices are weighted averages from multiple trades. According to the footnotes, transactions occurred at prices ranging from $177.1800 up to $202.2600 per share, with separate ranges disclosed for each sale block in the Form 4.

How many Vicor (VICR) shares does Philip D. Davies own after these transactions?

After the reported trades, Philip D. Davies directly owns 1,920 Vicor common shares. The Form 4 also shows remaining non-qualified stock options in three grants, with 15,358, 7,752, and 1,827 underlying shares respectively still reported as held following the exercises.

Were Philip D. Davies’ Vicor (VICR) share sales pre-planned?

Yes. A footnote states the sales were effected under a Rule 10b5-1 trading plan adopted on November 21, 2025. Such plans allow insiders to schedule trades in advance, helping separate routine liquidity transactions from timing decisions based on later information.

What types of securities did Philip D. Davies exercise in this Vicor (VICR) filing?

He exercised non-qualified stock options into Vicor common stock. The filing lists several option grants, with exercises at prices including $41.6100, $60.6100, and $75.4300 per share, and notes that these options generally expire two years from each vesting date.