Silicon Motion Technology CORP SEC filings SIMO
Silicon Motion Technology CORP has 455 filings in SEC EDGAR's recent list, going back to Jun 9, 2005. Its latest annual report, Form 20-F, was filed on Apr 30, 2026 for the period ended Dec 31, 2025. The most recent current report (Form 6-K) was filed on Oct 29, 2026. The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 5, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2026 | — |
| 4 | Insider transaction | Jun 24, 2026 | Jun 2, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 17, 2026 |
| 144 | Notice of proposed sale | Jun 4, 2026 | — |
| 144 | Notice of proposed sale | May 27, 2026 | — |
| 144 | Notice of proposed sale | May 27, 2026 | — |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 4 | Insider transaction | May 7, 2026 | May 6, 2026 |
| 144 | Notice of proposed sale | May 1, 2026 | — |
| 3 | Initial insider ownership | Apr 9, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Apr 9, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Apr 9, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Apr 9, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Apr 9, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Apr 9, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 30, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 27, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 27, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 27, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 27, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 27, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 27, 2026 | Mar 18, 2026 |
| 144 | Notice of proposed sale | Feb 24, 2026 | — |
| 144 | Notice of proposed sale | Dec 9, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 5, 2025 | — |
| 144 | Notice of proposed sale | Nov 10, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 5, 2025 | — |
| 144 | Notice of proposed sale | Sep 16, 2025 | — |
| 144 | Notice of proposed sale | Sep 9, 2025 | — |
| 144 | Notice of proposed sale | Aug 12, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2025 | — |
| 144 | Notice of proposed sale | Jun 25, 2025 | — |
| 144 | Notice of proposed sale | May 12, 2025 | — |
| 144 | Notice of proposed sale | Dec 18, 2024 | — |
| 144 | Notice of proposed sale | Dec 3, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 12, 2024 | — |
| 144 | Notice of proposed sale | Jun 21, 2024 | — |
| 144 | Notice of proposed sale | Jun 7, 2024 | — |
| 144 | Notice of proposed sale | May 13, 2024 | — |
| 144 | Notice of proposed sale | May 10, 2024 | — |
| 144 | Notice of proposed sale | May 8, 2024 | — |
| 144 | Notice of proposed sale | Mar 4, 2024 | — |
| 144 | Notice of proposed sale | Feb 20, 2024 | — |
| 144 | Notice of proposed sale | Feb 13, 2024 | — |
| 144 | Notice of proposed sale | Dec 20, 2023 | — |
| 144 | Notice of proposed sale | Sep 15, 2023 | — |
| 144 | Notice of proposed sale | Sep 13, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 17, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 8, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Dec 8, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Apr 6, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 9, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Oct 8, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Feb 11, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2018 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jul 7, 2017 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 6, 2017 | — |
| SC 13G | Ownership over 5% (passive) | Jan 23, 2017 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Aug 9, 2016 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 16, 2016 | — |
| SC 13G | Ownership over 5% (passive) | Feb 11, 2016 | — |
| SC 13G | Ownership over 5% (passive) | Jan 28, 2016 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 9, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 5, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Apr 8, 2014 | — |
| SC 13G | Ownership over 5% (passive) | Apr 8, 2014 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Mar 14, 2013 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 25, 2013 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2013 | — |
| SC 13G | Ownership over 5% (passive) | Jun 22, 2012 | — |
| SC 13G/A | Amended ownership over 5% (passive) | May 7, 2012 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 13, 2012 | — |
| SC 13G | Ownership over 5% (passive) | Sep 2, 2011 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2011 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2011 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2010 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2010 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Dec 31, 2009 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 14, 2009 | — |
| SC 13G | Ownership over 5% (passive) | Sep 4, 2009 | — |
| SC 13G | Ownership over 5% (passive) | Apr 16, 2009 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 17, 2009 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 10, 2008 | — |
| SC 13G | Ownership over 5% (passive) | Mar 19, 2008 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2008 | — |
| SC 13G | Ownership over 5% (passive) | Jan 24, 2008 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2007 | — |
| SC 13G | Ownership over 5% (passive) | Dec 11, 2006 | — |
Showing 99 filings. 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
- SIMO (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- Cayman Islands
- Headquarters
- Hong Kong Island, Hong Kong
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1329394
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.