Vicor director Philip D. Davies sells 3,072 shares

Vicor's corporate vice president for global sales and marketing and director reported the sales under a Rule 10b5-1 plan adopted on November 21, 2025.

Rhea-AI Filing Summary

Vicor (VICR) director and corporate vice president Philip D. Davies exercised non-qualified stock options covering 856 shares at an exercise price of $41.6100 per share and 2,216 shares at $33.9600 per share on October 1, 2026, acquiring the corresponding common shares. He sold 3,072 shares in 11 transactions that day. The sales were made under a Rule 10b5-1 trading plan adopted November 21, 2025, and the reported sale prices were weighted averages.

Insider Trade Summary 10b5-1

Exercise and Sale: 3,072 shares ($861K approx. pre-tax spread)

Exercise and Sale 15 txns

Insider Davies Philip D

Role Corp. VP-Global Sales & Mktg.

Sold 3,072 shs ($972K)

Approx. gross sale proceeds $972K

Approx. exercise cost $111K

Approx. pre-tax spread $861K

Type	Security	Shares	Price	Value
Exercise	Non Qualified Stock Option	856	$0.00	$0.00
Exercise	Non Qualified Stock Option	2,216	$0.00	$0.00
Exercise	Common Stock	856	$41.61	$36K
Exercise	Common Stock	2,216	$33.96	$75K
Sale	Common Stock F1, F2	200	$307.085	$61K
Sale	Common Stock F1, F3	272	$308.4879	$84K
Sale	Common Stock F1, F4	100	$311.83	$31K
Sale	Common Stock F1, F5	100	$313.20	$31K
Sale	Common Stock F1, F6	300	$314.8367	$94K
Sale	Common Stock F1, F7	300	$316.2567	$95K
Sale	Common Stock F1, F8	500	$317.324	$159K
Sale	Common Stock F1, F9	400	$318.295	$127K
Sale	Common Stock F1, F10	299	$319.6653	$96K
Sale	Common Stock F1, F11	201	$320.1776	$64K
Sale	Common Stock F1, F12	400	$322.025	$129K

Holdings After Transaction: Non Qualified Stock Option — 43,324 contracts (Direct); Common Stock — 1,920 shares (Direct)

Footnotes (12)

1. F1. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $306.9900 and $307.1800. The reporting person undertakes to provide to Vicor Corporation, any security holder of Vicor Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.3000 to $308.6400.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $311.8300 to $311.8300.
5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.2000 to $313.2000.
6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $314.6200 to $315.0700.
7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.6600 to $316.6000.
8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $317.0200 to $317.9000.
9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $318.0200 to $318.9200.
10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.0700 to $320.0000.
11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.0700 to $320.7000.
12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $321.7100 to $322.3200.

Key Figures

Shares acquired on option exercise: 856 shares Exercise price: $41.6100 per share Shares acquired on option exercise: 2,216 shares +5 more

8 metrics

Shares acquired on option exercise 856 shares Non-qualified stock option exercise on October 1, 2026

Exercise price $41.6100 per share Option exercise covering 856 shares on October 1, 2026

Shares acquired on option exercise 2,216 shares Non-qualified stock option exercise on October 1, 2026

Exercise price $33.9600 per share Option exercise covering 2,216 shares on October 1, 2026

Shares sold 3,072 shares October 1, 2026

Sale transactions 11 transactions October 1, 2026

Weighted-average sale price $307.0850 per share 200-share sale on October 1, 2026

Weighted-average sale price $322.0250 per share 400-share sale on October 1, 2026

Key Terms

Non Qualified Stock Option, Rule 10b5-1 trading plan, weighted average price

3 terms

Non Qualified Stock Option financial

"Non Qualified Stock Option covering 856 shares"

Rule 10b5-1 trading plan financial

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

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.

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.

FAQ

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

How many VICR shares did Philip D. Davies sell?

Philip D. Davies sold 3,072 shares in 11 transactions on October 1, 2026. The sales were made under a Rule 10b5-1 trading plan adopted November 21, 2025.

What prices did Philip D. Davies report for his VICR share sales?

The reported weighted-average prices were $307.0850 per share for 200 shares, $308.4879 for 272 shares, $311.8300 for 100 shares, $313.2000 for 100 shares, $314.8367 for 300 shares, $316.2567 for 300 shares, $317.3240 for 500 shares, $318.2950 for 400 shares, $319.6653 for 299 shares, $320.1776 for 201 shares, and $322.0250 per share for 400 shares.

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

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Available on EDGAR 10/05/2026 - 03:55 PM Accepted by SEC EDGAR 10/05/2026 - 03:55 PM 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^*

Davies Philip D

(Last) (First) (Middle)

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		10% Owner
X	Officer (give title below)		Other (specify below)
	Corp. VP-Global Sales & Mktg.

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

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	10/01/2026		M		856	A	$41.61	2,776	D
Common Stock	10/01/2026		M		2,216	A	$33.96	4,992	D
Common Stock	10/01/2026		S(1)		200	D	$307.085(2)	4,792	D
Common Stock	10/01/2026		S(1)		272	D	$308.4879(3)	4,520	D
Common Stock	10/01/2026		S(1)		100	D	$311.83(4)	4,420	D
Common Stock	10/01/2026		S(1)		100	D	$313.2(5)	4,320	D
Common Stock	10/01/2026		S(1)		300	D	$314.8367(6)	4,020	D
Common Stock	10/01/2026		S(1)		300	D	$316.2567(7)	3,720	D
Common Stock	10/01/2026		S(1)		500	D	$317.324(8)	3,220	D
Common Stock	10/01/2026		S(1)		400	D	$318.295(9)	2,820	D
Common Stock	10/01/2026		S(1)		299	D	$319.6653(10)	2,521	D
Common Stock	10/01/2026		S(1)		201	D	$320.1776(11)	2,320	D
Common Stock	10/01/2026		S(1)		400	D	$322.025(12)	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	10/01/2026		M			856	05/02/2026	05/02/2028	Common Stock	856	$0	7,678	D
Non Qualified Stock Option	$33.96	10/01/2026		M			2,216	05/03/2025	05/03/2027	Common Stock	2,216	$0	35,646	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 $306.9900 and $307.1800. The reporting person undertakes to provide to Vicor Corporation, any security holder of Vicor Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (2) through (12) to this Form 4.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.3000 to $308.6400.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $311.8300 to $311.8300.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.2000 to $313.2000.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $314.6200 to $315.0700.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.6600 to $316.6000.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $317.0200 to $317.9000.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $318.0200 to $318.9200.

10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.0700 to $320.0000.

11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $320.0700 to $320.7000.

12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $321.7100 to $322.3200.

	/s/Quentin A. Fendelet Attorney in Fact for Philip D. Davies	10/05/2026
	** 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.
* Form 4: SEC 1474 (03-26)