Philip D. Davies - 01 Sep 2026 Form 4 Insider Report for VICOR CORP (VICR)

Reporting relationship: Corp. VP-Global Sales & Mktg., Director
Issuer ticker: VICR
Reported as of: 01 Sep 2026
Net transaction value: -$546,084
SEC form: 4
Accepted by SEC: 03 Sep 2026, 14:13:35 UTC
Prior SEC filing: 05 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/Quentin A. Fendelet Attorney in Fact for Philip D. Davies

Key filing fact

Philip D. Davies filed Form 4 for VICOR CORP (VICR) on 03 Sep 2026.

Key facts

This page summarizes Philip D. Davies's Form 4 filing for VICOR CORP (VICR).
6 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 03 Sep 2026, 14:13.

Change

Previous filing in this sequence was filed on 05 Aug 2026.
Current net transaction value: -$546,084.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001512868 Primary reporting owner

Davies Philip D

Relationship: Corp. VP-Global Sales & Mktg., Director
Address: 25 FRONTAGE ROAD, ANDOVER
Signature: /s/Quentin A. Fendelet Attorney in Fact for Philip D. Davies
Signature date: 03 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

VICR transaction

Common Stock

Options Exercise

Transaction value
Shares: +3,073
Change %: +160%
Price: $41.61^*
Shares after: 4,993
Date: 01 Sep 2026
Ownership: Direct

VICR transaction

Common Stock

Sale

Transaction value: $207,143
Shares: -1,173
Change %: -23%
Price: $176.59
Shares after: 3,820
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F1, F2

VICR transaction

Common Stock

Sale

Transaction value: $195,394
Shares: -1,100
Change %: -29%
Price: $177.63
Shares after: 2,720
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F1, F3

VICR transaction

Common Stock

Sale

Transaction value: $125,062
Shares: -700
Change %: -26%
Price: $178.66
Shares after: 2,020
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F1, F4

VICR transaction

Common Stock

Sale

Transaction value: $18,485
Shares: -100
Change %: -5%
Price: $184.85
Shares after: 1,920
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F1, F5

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

VICR transaction Derivative

Non Qualified Stock Option

Options Exercise

Transaction value
Shares: -3,073
Change %: -78%
Price: $0.000000^*
Shares after: 856
Date: 01 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 3,073
Exercise price: $41.61

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

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

Footnote F2

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $176.0000 and $176.9900. 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 (5) to this Form 4.

Footnote F3

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.3000 to $177.8800.

Footnote F4

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $178.4300 to $179.0400.

Footnote F5

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.8500 to $184.8500.