ASE Technology Holding Co., Ltd. SEC filings ASX
ASE Technology Holding Co., Ltd. has 946 filings in SEC EDGAR's recent list, going back to Aug 28, 2000. Its latest annual report, Form 20-F, was filed on Apr 1, 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 |
|---|---|---|---|
| 4 | Insider transaction | Nov 3, 2026 | Oct 30, 2026 |
| 4 | Insider transaction | Oct 14, 2026 | Oct 12, 2026 |
| 4 | Insider transaction | Sep 24, 2026 | Sep 22, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Sep 9, 2026 | Sep 7, 2026 |
| 4 | Insider transaction | Aug 19, 2026 | Aug 12, 2026 |
| 3 | Initial insider ownership | Aug 10, 2026 | Aug 10, 2026 |
| 4 | Insider transaction | Jul 31, 2026 | Jul 29, 2026 |
| 4 | Insider transaction | Jul 24, 2026 | Jul 22, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 15, 2026 | Jul 13, 2026 |
| 4 | Insider transaction | Jul 8, 2026 | Jul 6, 2026 |
| 4 | Insider transaction | Jul 2, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Jun 23, 2026 | Jun 18, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 3/A | Form 3a | May 27, 2026 | Mar 18, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | Apr 28, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 23, 2026 | Apr 21, 2026 |
| 4 | Insider transaction | Apr 22, 2026 | Apr 20, 2026 |
| 4 | Insider transaction | Apr 20, 2026 | Apr 16, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Apr 15, 2026 | — |
| 4 | Insider transaction | Apr 15, 2026 | Apr 13, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 10, 2026 | Apr 8, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| 3 | Initial insider ownership | Mar 18, 2026 | Mar 18, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Mar 12, 2025 | — |
| SC 13D | Ownership over 5% (active) | May 8, 2024 | — |
| 3 | Initial insider ownership | May 8, 2024 | May 3, 2024 |
| SC 13E3/A | Schedule 13e-3 (amendment no. 4) | Apr 30, 2018 | — |
| SC 13E3/A | Schedule 13e-3 (amendment no. 3) | Jan 16, 2018 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jan 4, 2018 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 20, 2017 | — |
| SC 13E3/A | Schedule 13e-3 (amendment no. 2) | Dec 14, 2017 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 14, 2017 | — |
| SC 13D/A | Amended ownership over 5% (active) | Mar 24, 2017 | — |
| SC 13E3/A | Schedule 13e-3 (amendment no. 1) | Jan 6, 2017 | — |
| SC 13E3 | Schedule 13e-3 | Nov 22, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | Aug 26, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jul 8, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jul 6, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jun 27, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | May 26, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | May 20, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | Mar 30, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | Mar 28, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | Mar 17, 2016 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 29, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 22, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 14, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 16, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 9, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 4, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Oct 26, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Oct 22, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Oct 14, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Oct 6, 2015 | — |
| SC 13D/A | Amended ownership over 5% (active) | Oct 5, 2015 | — |
| SC 13D | Ownership over 5% (active) | Oct 2, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Sep 9, 2015 | — |
| SC 13D | Ownership over 5% (active) | Mar 18, 2015 | — |
| SC 13G | Ownership over 5% (passive) | Feb 3, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2013 | — |
| SC 13G | Ownership over 5% (passive) | Feb 15, 2012 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 1, 2011 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 8, 2010 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 17, 2009 | — |
| SC 13E3/A | Filing | Jun 26, 2008 | — |
| SC 13E3/A | Filing | May 30, 2008 | — |
| SC 13E3/A | Filing | Apr 2, 2008 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 15, 2008 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 15, 2008 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2007 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2007 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 13, 2006 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2006 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2006 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2006 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2006 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2006 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2005 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2005 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2005 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 17, 2004 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 17, 2004 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 17, 2004 | — |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2004 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2003 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2003 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Apr 17, 2002 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Apr 17, 2002 | — |
| SC 13D | Ownership over 5% (active) | Jun 11, 2001 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2001 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2001 | — |
Showing 137 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
- ASX (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- Taiwan
- Headquarters
- Kaohsiung
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1122411
- Former names
- ASE Industrial Holding Co., Ltd. (until Jun 8, 2018); ADVANCED SEMICONDUCTOR ENGINEERING INC (until Apr 30, 2018)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.