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  4. [Form 4] VICOR CORP Insider Trading Activity

Vicor VP Philip D. Davies sells 3,073 shares

All 12 reported sales were made under a Rule 10b5-1 trading plan adopted November 21, 2025.

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Form Type
4

Rhea-AI Filing Summary

Philip D. Davies, a Corp. VP-Global Sales & Mktg. at Vicor Corporation, exercised non-qualified stock options to acquire 3,073 common shares at $33.96 per share on November 2, 2026, then sold 3,073 shares in 12 reported transactions that day. Reported weighted-average sale prices included $174.9978 per share for 478 shares and $192.0700 per share for 5 shares. The sales were made under a Rule 10b5-1 trading plan adopted November 21, 2025. The reported option position following the transaction was 32,573 options.

Insider Davies Philip D
Role Corp. VP-Global Sales & Mktg.
Sold 3,073 shs ($563K)
Approx. gross sale proceeds $563K
Approx. exercise cost $104K
Approx. pre-tax spread $459K
Share of Position Sold 61.5%
Type Security Shares Price Value
Exercise Non Qualified Stock Option 3,073 $0.00 $0.00
Exercise Common Stock 3,073 $33.96 $104K
Sale Common Stock F1, F2 478 $174.9978 $84K
Sale Common Stock F1, F3 100 $176.26 $18K
Sale Common Stock F1, F4 100 $177.32 $18K
Sale Common Stock F1, F5 300 $179.36 $54K
Sale Common Stock F1, F6 200 $180.95 $36K
Sale Common Stock F1, F7 300 $182.8933 $55K
Sale Common Stock F1, F8 400 $184.725 $74K
Sale Common Stock F1, F9 300 $186.5271 $56K
Sale Common Stock F1, F10 390 $187.7345 $73K
Sale Common Stock F1, F11 200 $189.845 $38K
Sale Common Stock F1, F12 300 $190.9933 $57K
Sale Common Stock F1, F13 5 $192.07 $960.35
Holdings After Transaction: Non Qualified Stock Option — 32,573 contracts (Direct); Common Stock — 1,920 shares (Direct)
Holdings Before and After: Non Qualified Stock Option, 35,646 to 32,573 contracts (Direct); Common Stock, 1,920 to 1,920 shares (Direct)
Other Insiders: 1 other insider reported open-market sales of this stock in the 30 days up to this filing.
Footnotes (13)
  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 $174.7300 and $175.4200. 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 (13) 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 $176.2600 to $176.2600.
  4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.3200 to $177.3200.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $179.2200 to $179.4500.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $180.9500 to $180.9500.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.4600 to $183.1100.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.2600 to $185.2400.
  9. F9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.0300 to $187.0100.
  10. F10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.6100 to $187.8900.
  11. F11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.3600 to $190.3300.
  12. F12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $190.8900 to $191.2000.
  13. F13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $192.0700 to $192.0700.
Common shares sold 3,073 shares November 2, 2026
Shares acquired through option exercise 3,073 shares November 2, 2026
Option exercise price $33.96 per share November 2, 2026
Weighted-average sale price $174.9978 per share 478 shares sold on November 2, 2026
Weighted-average sale price $192.0700 per share 5 shares sold on November 2, 2026
Options following transaction 32,573 options Reported following the November 2, 2026 transaction
Non Qualified Stock Option financial
"Non Qualified Stock Option"
Rule 10b5-1 trading plan financial
"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, and when?
Philip D. Davies sold 3,073 shares on November 2, 2026, across 12 reported transactions. The sales were made under a Rule 10b5-1 trading plan adopted November 21, 2025.

What happened to Philip D. Davies's VICR stock options?
Davies exercised options to acquire 3,073 common shares at $33.96 per share on November 2, 2026. The reported option position following the transaction was 32,573 options.

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

Form 4 Insider Transactions: What Each Field Means →
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SEC Form 4
FORM 4UNITED 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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Corp. VP-Global Sales & Mktg.
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
11/02/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock11/02/2026M3,073A$33.964,993D
Common Stock11/02/2026S(1)478D$174.9978(2)4,515D
Common Stock11/02/2026S(1)100D$176.26(3)4,415D
Common Stock11/02/2026S(1)100D$177.32(4)4,315D
Common Stock11/02/2026S(1)300D$179.36(5)4,015D
Common Stock11/02/2026S(1)200D$180.95(6)3,815D
Common Stock11/02/2026S(1)300D$182.8933(7)3,515D
Common Stock11/02/2026S(1)400D$184.725(8)3,115D
Common Stock11/02/2026S(1)300D$186.5271(9)2,815D
Common Stock11/02/2026S(1)390D$187.7345(10)2,425D
Common Stock11/02/2026S(1)200D$189.845(11)2,225D
Common Stock11/02/2026S(1)300D$190.9933(12)1,925D
Common Stock11/02/2026S(1)5D$192.07(13)1,920D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Non Qualified Stock Option$33.9611/02/2026M3,07305/03/202505/03/2027Common Stock3,073$032,573D
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 $174.7300 and $175.4200. 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 (13) 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 $176.2600 to $176.2600.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $177.3200 to $177.3200.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $179.2200 to $179.4500.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $180.9500 to $180.9500.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $182.4600 to $183.1100.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $184.2600 to $185.2400.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.0300 to $187.0100.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.6100 to $187.8900.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.3600 to $190.3300.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $190.8900 to $191.2000.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $192.0700 to $192.0700.
/s/Quentin A. Fendelet Attorney in Fact for Philip D. Davies11/03/2026
** Signature of Reporting PersonDate
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

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