Was Philip D. Davies’ VICR share sale pre‑planned under Rule 10b5-1?

Yes. The Form 4 states the sale was effected under a Rule 10b5‑1 trading plan adopted on November 21, 2025. Such pre‑arranged plans schedule trades in advance, which can make the timing less indicative of the insider’s short‑term market view.

What was the price range of Philip D. Davies’ VICR share sales?

The filing shows weighted‑average sale prices between approximately $264.07 and $274.43 per share. Footnotes explain that each reported price represents averages for multiple trades executed within narrower price bands on May 1, 2026, for VICOR CORP common stock.

Vicor (NASDAQ: VICR) VP exercises options and sells 3,073 shares

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

VICOR CORP’s VP of Global Sales & Marketing, Philip D. Davies, executed an option exercise and related share sales. On May 1, 2026, he exercised 3,073 Non Qualified Stock Options at an exercise price of $30.98 per share, receiving an equal number of common shares.

That same day, he completed a series of open‑market sales totaling 3,073 common shares at prices ranging from about $264.07 to $274.43, under a pre‑arranged Rule 10b5‑1 trading plan. After these transactions, he held 4,893 common shares directly, indicating this was an exercise‑and‑sell pattern with a remaining equity stake.

Insider Trade Summary 10b5-1

Net Seller: 3,073 shares ($826,851)

Net Sell 10 txns

Insider Davies Philip D

Role VP Global Sales & Marketing

Sold 3,073 shs ($827K)

Type	Security	Shares	Price	Value
Exercise	Non Qualified Stock Option	3,073	$0.00	--
Exercise	Common Stock	3,073	$30.98	$95K
Sale	Common Stock	100	$264.07	$26K
Sale	Common Stock	400	$266.505	$107K
Sale	Common Stock	800	$268.40	$215K
Sale	Common Stock	1,173	$269.3865	$316K
Sale	Common Stock	200	$270.31	$54K
Sale	Common Stock	200	$271.53	$54K
Sale	Common Stock	100	$273.21	$27K
Sale	Common Stock	100	$274.43	$27K

Holdings After Transaction: Non Qualified Stock Option — 5,466 shares (Direct, null); Common Stock — 4,993 shares (Direct, null)

Footnotes (1)

This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $264.0700 to $264.0700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $266.2200 to $266.9400. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $267.6900 to $268.6800 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $268.8100 to $269.7700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.1100 to $270.5100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.4400 to $271.6200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.2100 to $273.2100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.4300 to $274.4300. Options granted on 9/6/2019 and vest over five years.

Key Figures

Shares sold: 3,073 shares Shares exercised: 3,073 shares Exercise price: $30.98/share +3 more

6 metrics

Shares sold 3,073 shares Total VICR common shares sold on May 1, 2026

Shares exercised 3,073 shares Non Qualified Stock Options converted to common stock

Exercise price $30.98/share Exercise price of Non Qualified Stock Options

Sale price range $264.07–$274.43/share Weighted-average prices across multiple open-market sales

Shares held after 4,893 shares Direct VICR common stock ownership post-transaction

Net buy/sell direction Net sell of 3,073 shares Form 4 transaction summary netBuySellShares

Key Terms

Rule 10b5-1 trading plan, Non Qualified Stock Option, weighted average price, open-market sale, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person"

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 with an exercise price of $30.9800"

weighted average price financial

"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions"

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.

open-market sale financial

"transaction_action: open-market sale for VICOR CORP common stock"

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 exercise/conversion financial

"transaction_action: derivative exercise/conversion for options into common stock"

Form 4 Insider Transactions: What Each Field Means →

05/04/2026 - 12:01 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^*

Davies Philip D

(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
X	Officer (give title below)	Other (specify below)
	VP Global Sales & Marketing

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/01/2026

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)
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	05/01/2026		M		3,073	A	$30.98	4,993	D
Common Stock	05/01/2026		S⁽¹⁾		100	D	$264.07⁽²⁾	4,893	D
Common Stock	05/01/2026		S⁽¹⁾		400	D	$266.505⁽³⁾	4,493	D
Common Stock	05/01/2026		S⁽¹⁾		800	D	$268.4⁽⁴⁾	3,693	D
Common Stock	05/01/2026		S⁽¹⁾		1,173	D	$269.3865⁽⁵⁾	2,520	D
Common Stock	05/01/2026		S⁽¹⁾		200	D	$270.31⁽⁶⁾	2,320	D
Common Stock	05/01/2026		S⁽¹⁾		200	D	$271.53⁽⁷⁾	2,120	D
Common Stock	05/01/2026		S⁽¹⁾		100	D	$273.21⁽⁸⁾	2,020	D
Common Stock	05/01/2026		S⁽¹⁾		100	D	$274.43⁽⁹⁾	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)
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	$30.98	05/01/2026		M			3,073	⁽¹⁰⁾	09/06/2029	Common Stock	3,073	$0	5,466	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 $264.0700 to $264.0700.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $266.2200 to $266.9400.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $267.6900 to $268.6800

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $268.8100 to $269.7700.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.1100 to $270.5100.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.4400 to $271.6200.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.2100 to $273.2100.

9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.4300 to $274.4300.

10. Options granted on 9/6/2019 and vest over five years.

	/s/Quentin A. Fendelet Attorney in fact for Philip D. Davies	05/04/2026
	** 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 transactions did VICR executive Philip D. Davies report?

Philip D. Davies reported an option exercise and related share sales. He exercised 3,073 Non Qualified Stock Options at $30.98 per share and sold 3,073 common shares in multiple open‑market trades on May 1, 2026, under a Rule 10b5‑1 trading plan.

How many VICR shares did Philip D. Davies sell on May 1, 2026?

He sold 3,073 VICOR CORP common shares in several open‑market transactions. Sale prices ranged from about $264.07 to $274.43 per share, according to weighted‑average price disclosures for each trade group reported in the Form 4 filing.

What stock options did Philip D. Davies exercise in this VICR Form 4?

He exercised 3,073 Non Qualified Stock Options with an exercise price of $30.98 per share. These options were originally granted on September 6, 2019 and vest over five years, resulting in the issuance of 3,073 VICOR CORP common shares upon exercise.

How many VICR shares does Philip D. Davies hold after these transactions?

After the reported option exercise and sales, Philip D. Davies directly holds 4,893 VICOR CORP common shares. This figure reflects his remaining equity position as shown in the post‑transaction ownership column for the final common stock sale entry on the Form 4.