Advantest Corp SEC filings ATEYY
Advantest Corp has 315 filings in SEC EDGAR's recent list, going back to Mar 1, 2002. Its latest annual report, Form 20-F, was filed on Jun 25, 2015 for the period ended Mar 31, 2015. The most recent current report (Form 6-K) was filed on Apr 1, 2016. The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| EFFECT | Filing | Aug 11, 2026 | — |
| F-6 | Filing | Aug 6, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 27, 2026 | — |
| D/A | Filing | Aug 28, 2025 | — |
| D/A | Filing | Sep 3, 2024 | — |
| D/A | Filing | Jun 6, 2023 | — |
| D | Filing | Jun 9, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Aug 6, 2020 | — |
| 15F-12B | Form 15f | Apr 22, 2016 | — |
| S-8 POS | Post-effective amendment no. 1 | Apr 22, 2016 | — |
| S-8 POS | Post-effective amendment no. 1 | Apr 22, 2016 | — |
| S-8 POS | Post-effective amendment no. 1 | Apr 22, 2016 | — |
| S-8 POS | Post-effective amendment no. 1 | Apr 22, 2016 | — |
| S-8 POS | Post-effective amendment no. 1 | Apr 22, 2016 | — |
| S-8 POS | Post-effective amendment no. 1 | Apr 22, 2016 | — |
| F-6 POS | Filing | Apr 22, 2016 | — |
| 25 | Form 25 | Apr 11, 2016 | — |
| 6-K | Current report (foreign issuer) | Apr 1, 2016 | Apr 1, 2016 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2016 | — |
| 6-K | Current report (foreign issuer) | Feb 12, 2016 | Feb 12, 2016 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2016 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 4, 2016 | — |
| 6-K | Current report (foreign issuer) | Jan 27, 2016 | Jan 27, 2016 |
| 6-K | Current report (foreign issuer) | Dec 22, 2015 | Dec 22, 2015 |
| 6-K | Current report (foreign issuer) | Nov 13, 2015 | Nov 13, 2015 |
| 6-K | Current report (foreign issuer) | Oct 26, 2015 | Oct 26, 2015 |
| UPLOAD | Letter from the SEC | Sep 9, 2015 | — |
| CORRESP | Letter to the SEC | Sep 8, 2015 | — |
| UPLOAD | Letter from the SEC | Aug 31, 2015 | — |
| 6-K | Current report (foreign issuer) | Aug 14, 2015 | Aug 14, 2015 |
| 6-K | Current report (foreign issuer) | Jul 28, 2015 | Jul 28, 2015 |
| 6-K | Current report (foreign issuer) | Jun 25, 2015 | Jun 25, 2015 |
| 20-F | Annual report (foreign issuer) | Jun 25, 2015 | Mar 31, 2015 |
| 6-K | Current report (foreign issuer) | Jun 1, 2015 | Jun 1, 2015 |
| SD | Specialized disclosure (conflict minerals) | Jun 1, 2015 | — |
| 6-K | Current report (foreign issuer) | May 27, 2015 | May 27, 2015 |
| 6-K | Current report (foreign issuer) | Apr 27, 2015 | Apr 27, 2014 |
| 6-K | Current report (foreign issuer) | Mar 25, 2015 | Mar 25, 2015 |
| 6-K | Current report (foreign issuer) | Feb 13, 2015 | Feb 13, 2015 |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 5, 2015 | — |
| 6-K | Current report (foreign issuer) | Jan 29, 2015 | Jan 29, 2015 |
| 6-K | Current report (foreign issuer) | Nov 14, 2014 | Nov 14, 2014 |
| 6-K | Current report (foreign issuer) | Oct 28, 2014 | Oct 28, 2014 |
| 6-K | Current report (foreign issuer) | Aug 25, 2014 | Aug 25, 2014 |
| 6-K | Current report (foreign issuer) | Aug 14, 2014 | Aug 14, 2014 |
| 6-K | Current report (foreign issuer) | Aug 7, 2014 | Aug 7, 2014 |
| 6-K | Current report (foreign issuer) | Jul 24, 2014 | Jul 24, 2014 |
| S-8 POS | Post-effective amendment no.1 | Jul 23, 2014 | — |
| S-8 POS | Post-effective amendment no.1 | Jul 23, 2014 | — |
| 6-K | Current report (foreign issuer) | Jun 26, 2014 | Jun 26, 2014 |
| 20-F | Annual report (foreign issuer) | Jun 26, 2014 | Mar 31, 2014 |
| SC 13G | Ownership over 5% (passive) | Jun 12, 2014 | — |
| 6-K | Current report (foreign issuer) | Jun 2, 2014 | Jun 2, 2014 |
| SD | Specialized disclosure (conflict minerals) | Jun 2, 2014 | — |
| 6-K | Current report (foreign issuer) | May 28, 2014 | May 28, 2014 |
| 6-K | Current report (foreign issuer) | May 9, 2014 | May 9, 2014 |
| 6-K | Current report (foreign issuer) | Apr 24, 2014 | Apr 24, 2014 |
| 6-K | Current report (foreign issuer) | Feb 26, 2014 | Feb 26, 2014 |
| S-8 | Employee stock plan registration | Feb 26, 2014 | — |
| 6-K | Current report (foreign issuer) | Feb 14, 2014 | Feb 14, 2014 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2014 | — |
| 6-K | Current report (foreign issuer) | Jan 28, 2014 | Jan 28, 2014 |
| 6-K | Current report (foreign issuer) | Nov 14, 2013 | Nov 14, 2013 |
| 6-K | Current report (foreign issuer) | Oct 29, 2013 | Oct 29, 2013 |
| 6-K | Current report (foreign issuer) | Sep 25, 2013 | Sep 25, 2013 |
| 6-K | Current report (foreign issuer) | Aug 14, 2013 | Aug 14, 2013 |
| 6-K | Current report (foreign issuer) | Jul 25, 2013 | Jul 25, 2013 |
| 6-K | Current report (foreign issuer) | Jul 24, 2013 | Jul 24, 2013 |
| 6-K | Current report (foreign issuer) | Jul 12, 2013 | Jul 12, 2013 |
| 20-F | Annual report (foreign issuer) | Jun 27, 2013 | Mar 31, 2013 |
| 6-K | Current report (foreign issuer) | Jun 27, 2013 | Jun 27, 2013 |
| 6-K | Current report (foreign issuer) | Jun 3, 2013 | Jun 3, 2013 |
| 6-K | Current report (foreign issuer) | May 30, 2013 | May 30, 2013 |
| 6-K | Current report (foreign issuer) | Apr 25, 2013 | Apr 25, 2013 |
| 6-K | Current report (foreign issuer) | Feb 14, 2013 | Feb 14, 2013 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 1, 2013 | — |
| 6-K | Current report (foreign issuer) | Jan 30, 2013 | Jan 30, 2013 |
| 6-K | Current report (foreign issuer) | Jan 28, 2013 | Jan 28, 2013 |
| 6-K | Current report (foreign issuer) | Nov 14, 2012 | Nov 14, 2012 |
| 6-K | Current report (foreign issuer) | Oct 25, 2012 | Oct 25, 2012 |
| S-8 POS | Post-effective amendment no.1 | Sep 26, 2012 | — |
| S-8 POS | Post-effective amendment no.1 | Sep 26, 2012 | — |
| S-8 | Employee stock plan registration | Sep 26, 2012 | — |
| 6-K | Current report (foreign issuer) | Aug 14, 2012 | Aug 14, 2012 |
| UPLOAD | Letter from the SEC | Aug 9, 2012 | — |
| 20-F/A | Amended annual report (foreign issuer) | Aug 6, 2012 | Mar 31, 2012 |
| CORRESP | Letter to the SEC | Aug 6, 2012 | — |
| UPLOAD | Letter from the SEC | Jul 31, 2012 | — |
| 6-K | Current report (foreign issuer) | Jul 26, 2012 | Jul 26, 2012 |
| 6-K | Current report (foreign issuer) | Jul 12, 2012 | Jul 12, 2012 |
| 20-F | Annual report (foreign issuer) | Jun 27, 2012 | Mar 31, 2012 |
| 6-K | Current report (foreign issuer) | Jun 27, 2012 | Jun 27, 2012 |
| 6-K | Current report (foreign issuer) | Jun 1, 2012 | Jun 1, 2012 |
| 6-K | Current report (foreign issuer) | May 18, 2012 | May 18, 2012 |
| 6-K/A | Report of foreign private issuer | Apr 27, 2012 | Apr 27, 2012 |
| 6-K | Current report (foreign issuer) | Apr 26, 2012 | Apr 26, 2012 |
| 6-K | Current report (foreign issuer) | Apr 24, 2012 | Apr 24, 2012 |
| 6-K | Current report (foreign issuer) | Feb 24, 2012 | Feb 24, 2012 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2012 | — |
| 6-K | Current report (foreign issuer) | Feb 10, 2012 | Feb 10, 2012 |
| 6-K | Current report (foreign issuer) | Jan 27, 2012 | Jan 27, 2012 |
| 6-K | Current report (foreign issuer) | Jan 24, 2012 | Jan 24, 2012 |
| 6-K | Current report (foreign issuer) | Nov 14, 2011 | Nov 11, 2011 |
| 6-K | Current report (foreign issuer) | Oct 27, 2011 | Oct 27, 2011 |
| 6-K | Current report (foreign issuer) | Oct 5, 2011 | Oct 5, 2011 |
| 6-K | Current report (foreign issuer) | Aug 16, 2011 | Aug 16, 2011 |
| 6-K | Current report (foreign issuer) | Aug 4, 2011 | Aug 4, 2011 |
| 6-K | Current report (foreign issuer) | Jul 27, 2011 | Jul 27, 2011 |
| 6-K | Current report (foreign issuer) | Jul 25, 2011 | Jul 25, 2011 |
| S-8 | Employee stock plan registration | Jul 21, 2011 | — |
| S-8 | Employee stock plan registration | Jul 20, 2011 | — |
| 6-K | Current report (foreign issuer) | Jul 20, 2011 | Jul 20, 2011 |
| 6-K | Current report (foreign issuer) | Jul 12, 2011 | Jul 12, 2011 |
| 6-K | Current report (foreign issuer) | Jul 6, 2011 | Jul 5, 2011 |
| 6-K | Current report (foreign issuer) | Jul 5, 2011 | Jul 5, 2011 |
| 6-K | Current report (foreign issuer) | Jul 5, 2011 | Jul 6, 2011 |
| 6-K | Current report (foreign issuer) | Jun 30, 2011 | Jun 30, 2011 |
| 6-K | Current report (foreign issuer) | Jun 27, 2011 | Jun 27, 2011 |
| 20-F | Annual report (foreign issuer) | Jun 24, 2011 | Mar 31, 2011 |
| 6-K | Current report (foreign issuer) | Jun 24, 2011 | Jun 24, 2011 |
| 6-K | Current report (foreign issuer) | Jun 20, 2011 | Jun 20, 2011 |
| 6-K | Current report (foreign issuer) | Jun 10, 2011 | Jun 9, 2011 |
| DFAN14A | Filing | Jun 10, 2011 | — |
| 6-K | Current report (foreign issuer) | Jun 1, 2011 | Jun 1, 2011 |
| DFAN14A | Advantest corp dfan14a | May 26, 2011 | — |
| 6-K | Current report (foreign issuer) | May 26, 2011 | May 25, 2011 |
| 6-K | Current report (foreign issuer) | Apr 27, 2011 | Apr 27, 2011 |
| 6-K | Current report (foreign issuer) | Apr 22, 2011 | Apr 22, 2011 |
| DFAN14A | Advantest dfan14a | Apr 18, 2011 | — |
| DFAN14A | Schedule 14a | Apr 14, 2011 | — |
| DFAN14A | Advantest dfan14a | Apr 4, 2011 | — |
| DFAN14A | Filing | Mar 28, 2011 | — |
| DFAN14A | Filing | Mar 28, 2011 | — |
| DFAN14A | Filing | Mar 28, 2011 | — |
| 6-K | Current report (foreign issuer) | Mar 28, 2011 | Mar 28, 2011 |
| 6-K | Current report (foreign issuer) | Mar 28, 2011 | Mar 28, 2011 |
| 6-K | Current report (foreign issuer) | Mar 28, 2011 | Mar 28, 2011 |
| 6-K | Current report (foreign issuer) | Mar 22, 2011 | Mar 21, 2011 |
| 6-K | Current report (foreign issuer) | Mar 22, 2011 | Mar 21, 2011 |
| DFAN14A | Advantest corp dfan14a | Mar 22, 2011 | — |
| DFAN14A | Advantest corp dfan14a | Mar 22, 2011 | — |
| 6-K | Current report (foreign issuer) | Mar 14, 2011 | Mar 14, 2011 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 8, 2011 | — |
| 6-K | Current report (foreign issuer) | Feb 4, 2011 | Feb 4, 2011 |
| 6-K | Current report (foreign issuer) | Jan 27, 2011 | Jan 27, 2011 |
| 6-K | Current report (foreign issuer) | Dec 27, 2010 | Dec 23, 2010 |
| 6-K | Current report (foreign issuer) | Dec 7, 2010 | Dec 7, 2010 |
| 6-K | Current report (foreign issuer) | Nov 9, 2010 | Nov 9, 2010 |
| 6-K | Current report (foreign issuer) | Oct 28, 2010 | Oct 28, 2010 |
| S-8 | Employee stock plan registration | Sep 29, 2010 | — |
| 6-K | Current report (foreign issuer) | Aug 27, 2010 | Aug 27, 2010 |
| UPLOAD | Letter from the SEC | Aug 25, 2010 | — |
| CORRESP | Letter to the SEC | Aug 16, 2010 | — |
| 6-K | Current report (foreign issuer) | Jul 30, 2010 | Jul 30, 2010 |
| UPLOAD | Letter from the SEC | Jul 29, 2010 | — |
| 6-K | Current report (foreign issuer) | Jul 28, 2010 | Jul 28, 2010 |
| 6-K | Current report (foreign issuer) | Jul 23, 2010 | Jul 23, 2010 |
| 6-K | Current report (foreign issuer) | Jul 12, 2010 | Jul 12, 2010 |
| 6-K | Current report (foreign issuer) | Jun 25, 2010 | Jun 25, 2010 |
| 20-F | Annual report (foreign issuer) | Jun 25, 2010 | Mar 31, 2010 |
| 6-K | Current report (foreign issuer) | Jun 1, 2010 | Jun 1, 2010 |
| S-8 POS | Post-effective amendment no.1 to registration statement on form s-8 | May 28, 2010 | — |
| 6-K | Current report (foreign issuer) | Apr 27, 2010 | Apr 27, 2010 |
| 6-K | Current report (foreign issuer) | Apr 26, 2010 | Apr 26, 2010 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2010 | — |
| 6-K | Current report (foreign issuer) | Feb 5, 2010 | Feb 5, 2010 |
| 6-K | Current report (foreign issuer) | Jan 28, 2010 | Jan 28, 2010 |
| 6-K | Current report (foreign issuer) | Jan 25, 2010 | Jan 25, 2010 |
| 6-K | Current report (foreign issuer) | Nov 6, 2009 | Nov 6, 2009 |
| 6-K | Current report (foreign issuer) | Oct 28, 2009 | Oct 28, 2009 |
| 6-K | Current report (foreign issuer) | Oct 20, 2009 | Oct 20, 2009 |
| UPLOAD | Letter from the SEC | Sep 25, 2009 | — |
| CORRESP | Letter to the SEC | Sep 24, 2009 | — |
| UPLOAD | Letter from the SEC | Sep 18, 2009 | — |
| S-8 | Employee stock plan registration | Sep 18, 2009 | — |
| CORRESP | Letter to the SEC | Sep 11, 2009 | — |
| UPLOAD | Letter from the SEC | Aug 31, 2009 | — |
| 6-K | Current report (foreign issuer) | Jul 31, 2009 | Jul 31, 2009 |
| 6-K | Current report (foreign issuer) | Jul 29, 2009 | Jul 29, 2009 |
| 6-K | Current report (foreign issuer) | Jul 24, 2009 | Jul 24, 2009 |
| 6-K | Current report (foreign issuer) | Jul 10, 2009 | Jul 10, 2009 |
| 20-F | Annual report (foreign issuer) | Jun 26, 2009 | Mar 31, 2009 |
| 6-K | Current report (foreign issuer) | Jun 26, 2009 | Jun 26, 2009 |
| 6-K | Current report (foreign issuer) | Jun 1, 2009 | Jun 1, 2009 |
| 6-K | Current report (foreign issuer) | May 26, 2009 | May 26, 2009 |
| 6-K | Current report (foreign issuer) | Apr 27, 2009 | Apr 27, 2009 |
| S-8 POS | Post-effective amendment no.1 to registration statement on form s-8 | Apr 15, 2009 | — |
| 6-K | Current report (foreign issuer) | Apr 1, 2009 | Apr 1, 2009 |
| 6-K | Current report (foreign issuer) | Mar 24, 2009 | Mar 24, 2009 |
| 6-K | Current report (foreign issuer) | Feb 25, 2009 | Feb 25, 2009 |
| SC 13G | Ownership over 5% (passive) | Feb 6, 2009 | — |
| 6-K | Current report (foreign issuer) | Feb 5, 2009 | Feb 5, 2009 |
| 6-K | Current report (foreign issuer) | Jan 28, 2009 | Jan 28, 2009 |
| 6-K | Current report (foreign issuer) | Nov 12, 2008 | Nov 11, 2008 |
| 6-K | Current report (foreign issuer) | Oct 30, 2008 | Oct 30, 2008 |
| S-8 | Employee stock plan registration | Sep 22, 2008 | — |
| 6-K | Current report (foreign issuer) | Aug 13, 2008 | Aug 13, 2008 |
| 6-K | Current report (foreign issuer) | Jul 25, 2008 | Jul 25, 2008 |
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
- ATEYY (OTC), ADTTF (OTC)
- Fiscal year ends
- December 31
- Incorporated in
- Japan
- Headquarters
- Chiyoda-Ku, Tokyo 100-0005, Japan
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1158838
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.