# EDGAR Filing Document

**Accession Number:** 0001830195
**File Stem:** 0001830195-26-000005
**Filing Date:** 2026-5
**Character Count:** 9063
**Document Hash:** 4c01142fe9bab7fb2c1efc3d957e9273
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001830195-26-000005.hdr.sgml**: 20260505

**ACCESSION NUMBER**: 0001830195-26-000005

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260504

**FILED AS OF DATE**: 20260505

**DATE AS OF CHANGE**: 20260505

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** D'Amico Andrew
- **CENTRAL INDEX KEY:** 0001830195

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-18277
- **FILM NUMBER:** 26941471

**MAIL ADDRESS:**
- **STREET 1:** 25 FRONTAGE RD.
- **CITY:** ANDOVER
- **STATE:** MA
- **ZIP:** 01810
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** VICOR CORP
- **CENTRAL INDEX KEY:** 0000751978
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRONIC COMPONENTS, NEC [3679]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 042742817
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 25 FRONTAGE ROAD
- **CITY:** ANDOVER
- **STATE:** MA
- **ZIP:** 01810
- **BUSINESS PHONE:** (978) 470-2900

**MAIL ADDRESS:**
- **STREET 1:** 25 FRONTAGE RD
- **CITY:** ANDOVER
- **STATE:** MA
- **ZIP:** 01810

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>D'Amico Andrew<br><sub>(Last) (First) (Middle)</sub><br>25 FRONTAGE RD.<br><sub>(Street)</sub><br>ANDOVER, MA 01810<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-05-04 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>VICOR CORP [ vicr ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2026-05-04 |  | M |  | 4596 | A | $33.96 | 4596 | D |  |
| Common Stock | 2026-05-04 |  | M |  | 2916 | A | $41.61 | 7512 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 200 | D | 244.295<sup>(2)</sup> | 7312 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 100 | D | 246.76<sup>(3)</sup> | 7212 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 200 | D | 247.905<sup>(4)</sup> | 7012 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 200 | D | 249.835<sup>(5)</sup> | 6812 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 1943 | D | 251.0759<sup>(6)</sup> | 4869 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 1469 | D | 252.2003<sup>(7)</sup> | 3400 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 595 | D | 253.6082<sup>(8)</sup> | 2805 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 868 | D | 254.353<sup>(9)</sup> | 1937 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 1337 | D | 255.4454<sup>(10)</sup> | 600 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 300 | D | 256.2733<sup>(11)</sup> | 300 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 200 | D | 257.195<sup>(12)</sup> | 100 | D |  |
| Common Stock | 2026-05-04 |  | S<sup>(1)</sup> |  | 100 | D | 267.62<sup>(13)</sup> | 0 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Non Qualified Stock Option | $33.96 | 2026-05-04 |  | M |  |  | 4596 | 2026-05-03 | <sup>(14)</sup> | Common Stock | 4596 | $0 | 13788 | D |  |
| Non Qualified Stock Option | $41.61 | 2026-05-04 |  | M |  |  | 2916 | 2026-05-02 | <sup>(14)</sup> | Common Stock | 2916 | $0 | 5832 | D |  |

---

### Footnotes:

(1) This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2024.

(2) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $244.2700 to $244.3200.

(3) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $246.7600 to $246.7600.

(4) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $247.8300 to $247.9800.

(5) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $249.7100 to $249.9600.

(6) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $250.7300 to $251.6100.

(7) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $251.7900 to $252.4800.

(8) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $252.9300 to $253.9100.

(9) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $253.9500 to $254.9300.

(10) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $255 to $255.9900.

(11) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $256.0200 to $256.6500.

(12) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $257.1800 to $257.2100.

(13) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $267.6200 to $267.6200.

(14) Options expire 2 years from each date of vesting.

**Signature:** /s/Quentin A. Fendelet  Attorney in fact for Andrew D'Amico  
**Date:** 2026-05-05

### Remarks:

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.**