| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Hsing Michael | CEO, Director | 5808 LAKE WASHINGTON BLVD NE, KIRKLAND | /s/ Saria Tseng, attorney-in-fact for Mr. Michael R. Hsing | 30 Oct 2025 | 0001308676 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MPWR | Common Stock | Tax liability | $133,698,936 | -121,918 | -11% | $1096.63 | 995,669 | 30 Oct 2025 | Direct | F1 |
| holding | MPWR | Common Stock | 133,040 | 30 Oct 2025 | by M Hsing 04 Trust | ||||||
| holding | MPWR | Common Stock | 12,825 | 30 Oct 2025 | ZH Family 2020 Trust |
| Id | Content |
|---|---|
| F1 | The sales transaction reported in this Form 4 represents shares of common stock withheld by the Company to satisfy the income tax obligations in connection with the earnout and vesting of the market-based restricted stock units granted in October 2022, previously reported in a Form 4. |