| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Gusinov Alex | Corp. Vice President Eng. | 25 FRONTAGE RD., ANDOVER | /s/Kemble D. Morrison Attorney in fact for Alex Gusinov | 17 Dec 2025 | 0001654925 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | VICR | Common Stock | Sale | $374,065 | -3,844 | -27% | $97.31 | 10,340 | 15 Dec 2025 | Direct |