STOCK TITAN

Vicor (VICR) CAO exercises options and sells 5,060 common shares

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Vicor Corp’s Corporate VP and Chief Accounting Officer, Quentin A. Fendelet, exercised stock options and sold the resulting shares of Common Stock on May 6, 2026. He exercised options covering a total of 5,060 shares at strike prices of $41.61, $50.00, and $60.61 per share, converting them into common shares.

On the same day, he completed a series of open‑market sales totaling 5,060 shares, at weighted‑average prices ranging from about $270.02 to $280.78 per share, according to the footnotes. After these transactions, the filing shows 0 shares of Common Stock held directly.

Positive

  • None.

Negative

  • None.
Insider Fendelet Quentin A.
Role Corp. VP - CAO
Sold 5,060 shs ($1.40M)
Type Security Shares Price Value
Exercise Non Qualified Stock Option 2,434 $0.00 --
Exercise Non Qualified Stock Option 2,169 $0.00 --
Exercise Non Qualified Stock Option 457 $0.00 --
Exercise Common Stock 2,434 $50.00 $122K
Exercise Common Stock 2,169 $41.61 $90K
Exercise Common Stock 457 $60.61 $28K
Sale Common Stock 500 $270.182 $135K
Sale Common Stock 200 $271.105 $54K
Sale Common Stock 200 $272.22 $54K
Sale Common Stock 283 $274.0198 $78K
Sale Common Stock 847 $275.2617 $233K
Sale Common Stock 500 $276.262 $138K
Sale Common Stock 2,530 $280.3866 $709K
Holdings After Transaction: Non Qualified Stock Option — 9,734 shares (Direct, null); Common Stock — 2,434 shares (Direct, null)
Footnotes (1)
  1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.0200 to $270.8000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.1050 to $271.1050. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.2200 to $272.2200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.8250 to $274.4900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.8500 to $275.6800. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.9100 to $276.5000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $280.0000 to $280.7800.
Shares sold 5,060 shares Total Vicor Common Stock sold in open-market trades on May 6, 2026
Sale price range $270.02–$280.78 per share Weighted-average price ranges for sales disclosed in footnotes
Options exercised 5,060 shares Common shares acquired via option exercises on May 6, 2026
Option strike prices $41.61, $50.00, $60.61 per share Exercise prices for non-qualified stock options converted to Common Stock
Common shares after trades 0 shares Directly held Vicor Common Stock reported following final sale
Non Qualified Stock Option financial
"security_title: "Non Qualified Stock Option""
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.
open-market sale financial
"transaction_action: "open-market sale""
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""
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).
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*
Fendelet Quentin A.

(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Corp. VP - CAO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/06/2026
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 Stock05/06/2026M2,434A$502,434D
Common Stock05/06/2026M2,169A$41.614,603D
Common Stock05/06/2026M457A$60.615,060D
Common Stock05/06/2026S500D$270.182(1)4,560D
Common Stock05/06/2026S200D$271.105(2)4,360D
Common Stock05/06/2026S200D$272.22(3)4,160D
Common Stock05/06/2026S283D$274.0198(4)3,877D
Common Stock05/06/2026S847D$275.2617(5)3,030D
Common Stock05/06/2026S500D$276.262(6)2,530D
Common Stock05/06/2026S2,530D$280.3866(7)0D
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$5005/06/2026M2,43405/02/202605/02/2028Common Stock2,434$09,734D
Non Qualified Stock Option$41.6105/06/2026M2,16905/02/202605/02/2028Common Stock2,169$04,625D
Non Qualified Stock Option$60.6105/06/2026M45704/25/202604/25/2028Common Stock457$0457D
Explanation of Responses:
1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.0200 to $270.8000.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.1050 to $271.1050.
3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.2200 to $272.2200.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.8250 to $274.4900.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.8500 to $275.6800.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.9100 to $276.5000.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $280.0000 to $280.7800.
/s/Kemble D. Morrison Attorney in fact for Quentin A. Fendelet05/08/2026
** 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)

FAQ

What insider transactions did Vicor (VICR) report for Quentin A. Fendelet?

Quentin A. Fendelet exercised options and sold shares. He converted options into 5,060 shares of Vicor common stock, then sold 5,060 shares in several open‑market transactions on May 6, 2026, as detailed in the Form 4 filing.

How many Vicor (VICR) shares did Quentin A. Fendelet sell and at what prices?

He sold 5,060 Vicor common shares. The Form 4 shows multiple open‑market sales with weighted‑average prices ranging from approximately $270.02 to $280.78 per share, based on detailed price ranges disclosed in the transaction footnotes.

What stock options did Quentin A. Fendelet exercise in the Vicor (VICR) Form 4?

He exercised non‑qualified stock options for 5,060 shares. The filing lists option exercises for 2,169 shares at $41.61, 2,434 shares at $50.00, and 457 shares at $60.61 per share, all converted into Vicor common stock on May 6, 2026.

Does the Vicor (VICR) Form 4 show Quentin A. Fendelet still holding common stock?

The filing shows zero common shares directly held after the trades. A transaction line reports total shares following the final open‑market sale as 0, indicating no remaining directly held Vicor common stock listed in this Form 4.

Were Quentin A. Fendelet’s Vicor (VICR) stock sales open‑market transactions?

Yes, the sales are reported as open‑market transactions. Each sale carries code “S” with the description “Sale in open market or private transaction,” and the filing provides weighted‑average prices with detailed price ranges in accompanying footnotes.