Key facts
- This page summarizes Philip D. Davies's Form 4 filing for VICOR CORP (VICR).
- 15 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 05 Oct 2026, 15:55.
Philip D. Davies - 01 Oct 2026 Form 4 Insider Report for VICOR CORP (VICR)
- Reporting relationship
- Corp. VP-Global Sales & Mktg., Director
- Issuer ticker
- VICR
- Reported as of
- 01 Oct 2026
- Net transaction value
- -$971,882
- SEC form
- 4
- Accepted by SEC
- 05 Oct 2026, 15:55:17 UTC
- Prior SEC filing
- 03 Sep 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/Quentin A. Fendelet Attorney in Fact for Philip D. Davies
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Filing notes and source
Key filing fact
Philip D. Davies filed Form 4 for VICOR CORP (VICR) on 05 Oct 2026.
Change
- Previous filing in this sequence was filed on 03 Sep 2026.
- Current net transaction value: -$971,882.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
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
- 05 Oct 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
- +856
- Change %
- +45%
- Price
- $41.61*
- Shares after
- 2,776
- Date
- 01 Oct 2026
- Ownership
- Direct
VICR
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +2,216
- Change %
- +80%
- Price
- $33.96*
- Shares after
- 4,992
- Date
- 01 Oct 2026
- Ownership
- Direct
VICR
transaction
Common Stock
Sale
- Transaction value
- $61,417
- Shares
- -200
- Change %
- -4%
- Price
- $307.08
- Shares after
- 4,792
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F2
VICR
transaction
Common Stock
Sale
- Transaction value
- $83,909
- Shares
- -272
- Change %
- -5.7%
- Price
- $308.49
- Shares after
- 4,520
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F3
VICR
transaction
Common Stock
Sale
- Transaction value
- $31,183
- Shares
- -100
- Change %
- -2.2%
- Price
- $311.83
- Shares after
- 4,420
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F4
VICR
transaction
Common Stock
Sale
- Transaction value
- $31,320
- Shares
- -100
- Change %
- -2.3%
- Price
- $313.20
- Shares after
- 4,320
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F5
VICR
transaction
Common Stock
Sale
- Transaction value
- $94,451
- Shares
- -300
- Change %
- -6.9%
- Price
- $314.84
- Shares after
- 4,020
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F6
VICR
transaction
Common Stock
Sale
- Transaction value
- $94,877
- Shares
- -300
- Change %
- -7.5%
- Price
- $316.26
- Shares after
- 3,720
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F7
VICR
transaction
Common Stock
Sale
- Transaction value
- $158,662
- Shares
- -500
- Change %
- -13%
- Price
- $317.32
- Shares after
- 3,220
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F8
VICR
transaction
Common Stock
Sale
- Transaction value
- $127,318
- Shares
- -400
- Change %
- -12%
- Price
- $318.30
- Shares after
- 2,820
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F9
VICR
transaction
Common Stock
Sale
- Transaction value
- $95,580
- Shares
- -299
- Change %
- -11%
- Price
- $319.67
- Shares after
- 2,521
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F10
VICR
transaction
Common Stock
Sale
- Transaction value
- $64,356
- Shares
- -201
- Change %
- -8%
- Price
- $320.18
- Shares after
- 2,320
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F11
VICR
transaction
Common Stock
Sale
- Transaction value
- $128,810
- Shares
- -400
- Change %
- -17%
- Price
- $322.02
- Shares after
- 1,920
- Date
- 01 Oct 2026
- Ownership
- Direct
- Footnotes
- F1, F12
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
- -856
- Change %
- -10%
- Price
- $0.000000*
- Shares after
- 7,678
- Date
- 01 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 856
- Exercise price
- $41.61
VICR
transaction
Derivative
Non Qualified Stock Option
Options Exercise
- Transaction value
- Shares
- -2,216
- Change %
- -5.9%
- Price
- $0.000000*
- Shares after
- 35,646
- Date
- 01 Oct 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 2,216
- Exercise price
- $33.96
* 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 12 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 $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.
Footnote 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.
Footnote 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.
Footnote 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.
Footnote 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.
Footnote 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.
Footnote 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.
Footnote 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.
Footnote 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.
Footnote 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.
Footnote 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.