### 4 - PRIMARY DOCUMENT
SEC FORM
4 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). |
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 * VINCIARELLI PATRIZIO |
(Last) | (First) | (Middle) |
C/O VICOR CORPORATION |
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) X | Director | X | 10% Owner |
X | Officer (give title below) | | Other (specify below) |
| Chairman and CEO | | |
|
2a. Foreign Trading Symbol
|
3. Date of Earliest Transaction
(Month/Day/Year)
06/04/2026 | 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)
|
Code | V | Amount | (A) or (D) | Price |
Common Stock | | | | | | | | 167,125 | I | See footnote (1) |
Common Stock | 06/04/2026 | | S (2) | | 1,600 | D | $ 305.1506 (3) | 8,746,490 | D | |
Common Stock | 06/04/2026 | | S (2) | | 1,673 | D | $ 307.6911 (4) | 8,744,817 | D | |
Common Stock | 06/04/2026 | | S (2) | | 3,200 | D | $ 309.0794 (5) | 8,741,617 | D | |
Common Stock | 06/04/2026 | | S (2) | | 1,863 | D | $ 310.4686 (6) | 8,739,754 | D | |
Common Stock | 06/04/2026 | | S (2) | | 2,762 | D | $ 311.5272 (7) | 8,736,992 | D | |
Common Stock | 06/04/2026 | | S (2) | | 1,337 | D | $ 312.4534 (8) | 8,735,655 | D | |
Common Stock | 06/04/2026 | | S (2) | | 1,265 | D | $ 313.4425 (9) | 8,734,390 | D | |
Common Stock | 06/04/2026 | | S (2) | | 2,000 | D | $ 314.8296 (10) | 8,732,390 | D | |
Common Stock | 06/04/2026 | | S (2) | | 1,900 | D | $ 315.9445 (11) | 8,730,490 | D | |
Common Stock | 06/04/2026 | | S (2) | | 1,600 | D | $ 316.9819 (12) | 8,728,890 | D | |
Common Stock | 06/04/2026 | | S (2) | | 400 | D | $ 317.8225 (13) | 8,728,490 | D | |
Common Stock | 06/04/2026 | | S (2) | | 400 | D | $ 319.215 (14) | 8,728,090 | 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)
|
Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares |
Explanation of Responses: |
1. These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person. |
2. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026. |
3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $304.7300 to $305.6400. 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 (3) through (14) to this Form 4. |
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $307.4400 to $308.1500. |
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.6000 to $309.5100. |
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $309.9000 to $310.8300. |
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $310.9100 to $311.8900. |
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $311.9600 to $312.8800. |
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.0400 to $313.7400. |
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $314.3200 to $315.2300. |
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.3400 to $316.3000. |
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $316.4800 to $317.4200. |
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $317.4800 to $318.0000. |
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.2000 to $319.2300. |
| /s/Kemble D. Morrison Attorney in fact for Patrizio Vinciarelli | 06/05/2026 |
| ** 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) |
### 4 - PRIMARY DOCUMENT
X0609
4
2026-06-04
0
0000751978
VICOR CORP
vicr
0000901484
VINCIARELLI PATRIZIO
false
C/O VICOR CORPORATION
25 FRONTAGE ROAD
ANDOVER
MA
01810
1
1
1
0
Chairman and CEO
1
Common Stock
167125
I
See footnote
Common Stock
2026-06-04
4
S
0
1600
305.1506
D
8746490
D
Common Stock
2026-06-04
4
S
0
1673
307.6911
D
8744817
D
Common Stock
2026-06-04
4
S
0
3200
309.0794
D
8741617
D
Common Stock
2026-06-04
4
S
0
1863
310.4686
D
8739754
D
Common Stock
2026-06-04
4
S
0
2762
311.5272
D
8736992
D
Common Stock
2026-06-04
4
S
0
1337
312.4534
D
8735655
D
Common Stock
2026-06-04
4
S
0
1265
313.4425
D
8734390
D
Common Stock
2026-06-04
4
S
0
2000
314.8296
D
8732390
D
Common Stock
2026-06-04
4
S
0
1900
315.9445
D
8730490
D
Common Stock
2026-06-04
4
S
0
1600
316.9819
D
8728890
D
Common Stock
2026-06-04
4
S
0
400
317.8225
D
8728490
D
Common Stock
2026-06-04
4
S
0
400
319.215
D
8728090
D
These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person.
This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $304.7300 to $305.6400. 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 (3) through (14) to this Form 4.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $307.4400 to $308.1500.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $308.6000 to $309.5100.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $309.9000 to $310.8300.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $310.9100 to $311.8900.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $311.9600 to $312.8800.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $313.0400 to $313.7400.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $314.3200 to $315.2300.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $315.3400 to $316.3000.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $316.4800 to $317.4200.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $317.4800 to $318.0000.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $319.2000 to $319.2300.
/s/Kemble D. Morrison Attorney in fact for Patrizio Vinciarelli
2026-06-05