Monolithic Power Systems, Inc. SEC filings MPWR
Monolithic Power Systems, Inc. has 1,000 filings in SEC EDGAR's recent list, going back to Dec 3, 2019. Its latest annual report, Form ARS, was filed on Apr 30, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 3, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 29, 2026 (results of operations, officer or director change). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 3 | Initial insider ownership | Oct 29, 2026 | Oct 27, 2026 |
| 4 | Insider transaction | Sep 30, 2026 | Sep 28, 2026 |
| 144 | Notice of proposed sale | Sep 28, 2026 | — |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Aug 26, 2026 | Aug 24, 2026 |
| 4 | Insider transaction | Aug 25, 2026 | Aug 24, 2026 |
| 144 | Notice of proposed sale | Aug 24, 2026 | — |
| 4 | Insider transaction | Aug 19, 2026 | Aug 17, 2026 |
| 144 | Notice of proposed sale | Aug 17, 2026 | — |
| 4 | Insider transaction | Aug 13, 2026 | Aug 11, 2026 |
| 144 | Notice of proposed sale | Aug 11, 2026 | — |
| 4 | Insider transaction | Aug 6, 2026 | Aug 4, 2026 |
| 4 | Insider transaction | Aug 6, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Aug 5, 2026 | Aug 3, 2026 |
| 144 | Notice of proposed sale | Aug 5, 2026 | — |
| 4 | Insider transaction | Jul 28, 2026 | Jul 25, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 144 | Notice of proposed sale | Jul 15, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 15, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 8, 2026 | — |
| 4 | Insider transaction | Jul 6, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 144 | Notice of proposed sale | Jun 1, 2026 | — |
| 4 | Insider transaction | May 29, 2026 | May 27, 2026 |
| 4 | Insider transaction | May 28, 2026 | May 26, 2026 |
| 144 | Notice of proposed sale | May 28, 2026 | — |
| 4 | Insider transaction | May 27, 2026 | May 26, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 144 | Notice of proposed sale | May 26, 2026 | — |
| 144 | Notice of proposed sale | May 26, 2026 | — |
| 144 | Notice of proposed sale | May 22, 2026 | — |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 144 | Notice of proposed sale | May 15, 2026 | — |
| 4 | Insider transaction | May 15, 2026 | May 13, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 6, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 6, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 6, 2026 |
| 144 | Notice of proposed sale | May 6, 2026 | — |
| 4 | Insider transaction | May 6, 2026 | May 5, 2026 |
| 144 | Notice of proposed sale | May 6, 2026 | — |
| 144 | Notice of proposed sale | May 6, 2026 | — |
| 144 | Notice of proposed sale | May 6, 2026 | — |
| 4 | Insider transaction | May 6, 2026 | May 5, 2026 |
| 4 | Insider transaction | May 6, 2026 | May 4, 2026 |
| 144 | Notice of proposed sale | May 5, 2026 | — |
| 144 | Notice of proposed sale | May 5, 2026 | — |
| 144 | Notice of proposed sale | May 1, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 4 | Insider transaction | Apr 10, 2026 | Apr 8, 2026 |
| 144 | Notice of proposed sale | Apr 8, 2026 | — |
| 4 | Insider transaction | Apr 8, 2026 | Apr 6, 2026 |
| 144 | Notice of proposed sale | Apr 6, 2026 | — |
| 4 | Insider transaction | Apr 3, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Apr 3, 2026 | Apr 1, 2026 |
| 4 | Insider transaction | Apr 1, 2026 | Mar 30, 2026 |
| 144 | Notice of proposed sale | Apr 1, 2026 | — |
| 144 | Notice of proposed sale | Apr 1, 2026 | — |
| 144 | Notice of proposed sale | Mar 30, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 24, 2026 | Mar 20, 2026 |
| 144 | Notice of proposed sale | Mar 20, 2026 | — |
| 3 | Initial insider ownership | Mar 9, 2026 | Feb 27, 2026 |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 4 | Insider transaction | Feb 17, 2026 | Feb 12, 2026 |
| 4 | Insider transaction | Feb 13, 2026 | Feb 11, 2026 |
| 4 | Insider transaction | Feb 12, 2026 | Feb 11, 2026 |
| 144 | Notice of proposed sale | Feb 12, 2026 | — |
| 4 | Insider transaction | Feb 12, 2026 | Feb 10, 2026 |
| 4 | Insider transaction | Feb 11, 2026 | Feb 9, 2026 |
| 144 | Notice of proposed sale | Feb 11, 2026 | — |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 4 | Insider transaction | Feb 10, 2026 | Feb 6, 2026 |
| 144 | Notice of proposed sale | Feb 10, 2026 | — |
| 144 | Notice of proposed sale | Feb 10, 2026 | — |
| 144 | Notice of proposed sale | Feb 6, 2026 | — |
| 144 | Notice of proposed sale | Feb 6, 2026 | — |
| 144 | Notice of proposed sale | Feb 6, 2026 | — |
| 144 | Notice of proposed sale | Feb 6, 2026 | — |
| 144 | Notice of proposed sale | Feb 6, 2026 | — |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 3, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 144 | Notice of proposed sale | Feb 2, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 8, 2026 | — |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 144 | Notice of proposed sale | Jan 2, 2026 | — |
| 4 | Insider transaction | Dec 30, 2025 | Dec 24, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 24, 2025 |
| 144 | Notice of proposed sale | Dec 29, 2025 | — |
| 4 | Insider transaction | Dec 11, 2025 | Dec 9, 2025 |
| 4 | Insider transaction | Dec 2, 2025 | Dec 1, 2025 |
| 144 | Notice of proposed sale | Dec 1, 2025 | — |
| 4 | Insider transaction | Nov 28, 2025 | Nov 26, 2025 |
| 4 | Insider transaction | Nov 28, 2025 | Nov 25, 2025 |
| 144 | Notice of proposed sale | Nov 26, 2025 | — |
| 144 | Notice of proposed sale | Nov 25, 2025 | — |
| 4 | Insider transaction | Nov 25, 2025 | Nov 25, 2025 |
| 4 | Insider transaction | Nov 25, 2025 | Nov 24, 2025 |
| 144 | Notice of proposed sale | Nov 24, 2025 | — |
| 4 | Insider transaction | Nov 24, 2025 | Nov 21, 2025 |
| 144 | Notice of proposed sale | Nov 21, 2025 | — |
| 4 | Insider transaction | Nov 20, 2025 | Nov 19, 2025 |
| 4 | Insider transaction | Nov 20, 2025 | Nov 19, 2025 |
| 144 | Notice of proposed sale | Nov 19, 2025 | — |
| 4 | Insider transaction | Nov 14, 2025 | Nov 13, 2025 |
| 4 | Insider transaction | Nov 13, 2025 | Nov 12, 2025 |
| 4 | Insider transaction | Nov 13, 2025 | Nov 11, 2025 |
| 144 | Notice of proposed sale | Nov 12, 2025 | — |
| 144 | Notice of proposed sale | Nov 12, 2025 | — |
| 144 | Notice of proposed sale | Nov 12, 2025 | — |
| 4 | Insider transaction | Nov 6, 2025 | Nov 5, 2025 |
| 4 | Insider transaction | Nov 4, 2025 | Nov 3, 2025 |
| 144 | Notice of proposed sale | Nov 4, 2025 | — |
| 144 | Notice of proposed sale | Nov 3, 2025 | — |
| 4 | Insider transaction | Oct 31, 2025 | Oct 30, 2025 |
| 4 | Insider transaction | Oct 31, 2025 | Oct 30, 2025 |
| 4 | Insider transaction | Oct 31, 2025 | Oct 30, 2025 |
| 4 | Insider transaction | Oct 31, 2025 | Oct 30, 2025 |
| 4 | Insider transaction | Oct 31, 2025 | Oct 30, 2025 |
| 144 | Notice of proposed sale | Oct 30, 2025 | — |
| 144 | Notice of proposed sale | Oct 30, 2025 | — |
| 144 | Notice of proposed sale | Oct 30, 2025 | — |
| 144 | Notice of proposed sale | Oct 30, 2025 | — |
| 144 | Notice of proposed sale | Oct 30, 2025 | — |
| 4 | Insider transaction | Oct 28, 2025 | Oct 25, 2025 |
| 4 | Insider transaction | Oct 28, 2025 | Oct 25, 2025 |
| 4 | Insider transaction | Oct 28, 2025 | Oct 25, 2025 |
| 4 | Insider transaction | Oct 28, 2025 | Oct 25, 2025 |
| 4 | Insider transaction | Oct 28, 2025 | Oct 25, 2025 |
| 144 | Notice of proposed sale | Oct 28, 2025 | — |
| 144 | Notice of proposed sale | Oct 28, 2025 | — |
| 144 | Notice of proposed sale | Oct 28, 2025 | — |
| 144 | Notice of proposed sale | Oct 28, 2025 | — |
| 144 | Notice of proposed sale | Oct 28, 2025 | — |
| 4 | Insider transaction | Oct 24, 2025 | Oct 24, 2025 |
| 144 | Notice of proposed sale | Oct 24, 2025 | — |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 144 | Notice of proposed sale | Oct 16, 2025 | — |
| 144 | Notice of proposed sale | Oct 15, 2025 | — |
| 4 | Insider transaction | Oct 1, 2025 | Oct 1, 2025 |
| 144 | Notice of proposed sale | Oct 1, 2025 | — |
| 4 | Insider transaction | Sep 23, 2025 | Sep 18, 2025 |
| 4 | Insider transaction | Sep 23, 2025 | Sep 18, 2025 |
| 144 | Notice of proposed sale | Sep 18, 2025 | — |
| 144 | Notice of proposed sale | Sep 18, 2025 | — |
| 4 | Insider transaction | Sep 3, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Aug 29, 2025 |
| 144 | Notice of proposed sale | Sep 2, 2025 | — |
| 144 | Notice of proposed sale | Aug 29, 2025 | — |
| 4 | Insider transaction | Aug 28, 2025 | Aug 27, 2025 |
| 144 | Notice of proposed sale | Aug 27, 2025 | — |
| 144 | Notice of proposed sale | Aug 22, 2025 | — |
| 4 | Insider transaction | Aug 21, 2025 | Aug 19, 2025 |
| 4 | Insider transaction | Aug 18, 2025 | Aug 15, 2025 |
| 144 | Notice of proposed sale | Aug 15, 2025 | — |
| 4 | Insider transaction | Aug 15, 2025 | Aug 13, 2025 |
| 4 | Insider transaction | Aug 13, 2025 | Aug 12, 2025 |
| 144 | Notice of proposed sale | Aug 13, 2025 | — |
| 144 | Notice of proposed sale | Aug 12, 2025 | — |
| 4 | Insider transaction | Aug 12, 2025 | Aug 11, 2025 |
| 4 | Insider transaction | Aug 8, 2025 | Aug 6, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Aug 1, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Aug 1, 2025 |
| 144 | Notice of proposed sale | Aug 1, 2025 | — |
| 144 | Notice of proposed sale | Aug 1, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 29, 2025 | — |
| 4 | Insider transaction | Jul 2, 2025 | Jul 1, 2025 |
| 144 | Notice of proposed sale | Jul 1, 2025 | — |
| 4 | Insider transaction | May 30, 2025 | May 28, 2025 |
| 144 | Notice of proposed sale | May 15, 2025 | — |
| 4 | Insider transaction | May 13, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 12, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 12, 2025 | May 12, 2025 |
| 144 | Notice of proposed sale | May 12, 2025 | — |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Semiconductors & Related Devices (SIC 3674)
- Listed as
- MPWR (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- West Palm Beach, FL
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1280452
- Former names
- MONOLITHIC POWER SYSTEMS INC (until Jul 15, 2026)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.