| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Gusinov Alex | Corp. Vice President Eng. | 25 FRONTAGE RD., ANDOVER | /s/Quentin A. Fendelet. Attorney in fact for Alex Gusinov | 29 Oct 2025 | 0001654925 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | VICR | Common Stock | Sale | $360,706 | -4,019 | -24% | $89.75 | 12,680 | 28 Oct 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Includes 27 shares acquired under the Vicor Corporation 2017 Employee Stock Purchase Plan on August 29 2025. |