The Vanguard Group 13D and 13G filings for Monolithic Power Systems, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2025-07-29 1:54 pm Purchase | 2025-06-30 | 13G | Monolithic Power Systems, Inc. MPWR | The Vanguard Group | 5,939,946 12.400% | 475,880 (+8.71%) | Filing |
| 2024-02-13 4:55 pm Purchase | 2023-12-29 | 13G | Monolithic Power Systems, Inc. MPWR | The Vanguard Group | 5,464,066 11.400% | 345,755 (+6.76%) | Filing |
| 2023-02-09 10:54 am Purchase | 2022-12-30 | 13G | Monolithic Power Systems, Inc. MPWR | The Vanguard Group | 5,118,311 10.900% | 324,257 (+6.76%) | Filing |
| 2022-02-10 08:27 am Purchase | 2021-12-31 | 13G | Monolithic Power Systems, Inc. MPWR | The Vanguard Group | 4,794,054 10.400% | 23,178 (+0.49%) | Filing |
| 2021-03-10 3:08 pm Purchase | 2021-02-26 | 13G | Monolithic Power Systems, Inc. MPWR | The Vanguard Group | 4,770,876 10.460% | 746,614 (+18.55%) | Filing |
| 2021-02-10 11:28 am Purchase | 2020-12-31 | 13G | Monolithic Power Systems, Inc. MPWR | The Vanguard Group | 4,024,262 8.920% | 186,225 (+4.85%) | Filing |