ALPHA & OMEGA SEMICONDUCTOR Ltd SEC filings AOSL
ALPHA & OMEGA SEMICONDUCTOR Ltd has 989 filings in SEC EDGAR's recent list, going back to Jan 16, 2007. Its latest annual report, Form ARS, was filed on Sep 30, 2026 for the period ended Jun 30, 2026. The latest quarterly report (Form 10-Q) was filed on May 6, 2026, covering the quarter ended Mar 31, 2026. The most recent current report (Form 8-K) was filed on Aug 12, 2026 (results of operations). The company's fiscal year ends on June 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| ARS | Annual report to shareholders | Sep 30, 2026 | Jun 30, 2026 |
| DEFA14A | Additional proxy material | Sep 30, 2026 | — |
| DEF 14A | Proxy statement | Sep 30, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Sep 11, 2026 | Aug 24, 2026 |
| 4 | Insider transaction | Sep 11, 2026 | Aug 24, 2026 |
| S-8 | Employee stock plan registration | Aug 27, 2026 | — |
| 10-K | Annual report | Aug 27, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Aug 14, 2026 | Aug 13, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2026 | Aug 12, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 10, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| 4 | Insider transaction | Jul 21, 2026 | Jul 20, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 16, 2026 |
| 3 | Initial insider ownership | Jul 17, 2026 | Jul 8, 2026 |
| 144 | Notice of proposed sale | Jul 16, 2026 | — |
| 4 | Insider transaction | Jul 15, 2026 | Jul 13, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 14, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 16, 2026 |
| 144 | Notice of proposed sale | Jun 16, 2026 | — |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 4 | Insider transaction | May 28, 2026 | May 26, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 26, 2026 | May 22, 2026 |
| 4 | Insider transaction | May 26, 2026 | May 21, 2026 |
| 144 | Notice of proposed sale | May 22, 2026 | — |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 8-K |
Current report
Acquisition or sale of assets
|
May 12, 2026 | May 11, 2026 |
| 10-Q | Quarterly report | May 6, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| 4 | Insider transaction | Apr 30, 2026 | Apr 27, 2026 |
| 4 | Insider transaction | Apr 20, 2026 | Apr 17, 2026 |
| 4 | Insider transaction | Apr 20, 2026 | Apr 17, 2026 |
| 4 | Insider transaction | Apr 20, 2026 | Apr 16, 2026 |
| 144 | Notice of proposed sale | Apr 17, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Apr 17, 2026 | Apr 13, 2026 |
| 144 | Notice of proposed sale | Apr 17, 2026 | — |
| 4 | Insider transaction | Apr 16, 2026 | Apr 14, 2026 |
| 4 | Insider transaction | Apr 16, 2026 | Apr 14, 2026 |
| 144 | Notice of proposed sale | Apr 16, 2026 | — |
| 144 | Notice of proposed sale | Apr 14, 2026 | — |
| 144 | Notice of proposed sale | Apr 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 9, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4/A | Form 4/a | Mar 25, 2026 | Mar 16, 2026 |
| 4/A | Form 4/a | Mar 25, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 18, 2026 | Mar 16, 2026 |
| 144 | Notice of proposed sale | Mar 16, 2026 | — |
| 4 | Insider transaction | Mar 10, 2026 | Mar 9, 2026 |
| 8-K |
Current report
Officer or director change
|
Mar 9, 2026 | Mar 5, 2026 |
| SD | Specialized disclosure (conflict minerals) | Feb 27, 2026 | — |
| 4 | Insider transaction | Feb 18, 2026 | Feb 17, 2026 |
| 144 | Notice of proposed sale | Feb 17, 2026 | — |
| 10-Q | Quarterly report | Feb 5, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 5, 2026 | Feb 5, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| 144 | Notice of proposed sale | Jan 15, 2026 | — |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 15, 2025 |
| 4 | Insider transaction | Dec 16, 2025 | Dec 15, 2025 |
| 144 | Notice of proposed sale | Dec 15, 2025 | — |
| 4 | Insider transaction | Nov 17, 2025 | Nov 14, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Nov 17, 2025 | Nov 11, 2025 |
| 144 | Notice of proposed sale | Nov 14, 2025 | — |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 11, 2025 |
| 10-Q | Quarterly report | Nov 6, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2025 | Nov 5, 2025 |
| 4 | Insider transaction | Oct 21, 2025 | Oct 20, 2025 |
| 4 | Insider transaction | Oct 21, 2025 | Oct 17, 2025 |
| ARS | Annual report to shareholders | Sep 18, 2025 | Jun 30, 2025 |
| DEFA14A | Additional proxy material | Sep 18, 2025 | — |
| DEF 14A | Proxy statement | Sep 18, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Sep 10, 2025 | Sep 9, 2025 |
| 4 | Insider transaction | Sep 2, 2025 | Aug 15, 2025 |
| S-8 | Employee stock plan registration | Aug 28, 2025 | — |
| 10-K | Annual report | Aug 28, 2025 | Jun 30, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 8-K |
Current report
Results of operations
|
Aug 6, 2025 | Aug 6, 2025 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Jul 14, 2025 | Jul 14, 2025 |
| UPLOAD | Letter from the SEC | Jun 5, 2025 | — |
| 8-K/A |
Amended current report
Auditor change
|
Jun 4, 2025 | Nov 19, 2024 |
| CORRESP | Letter to the SEC | Jun 4, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 15, 2025 | — |
| UPLOAD | Letter from the SEC | May 15, 2025 | — |
| 4 | Insider transaction | May 13, 2025 | May 12, 2025 |
| 10-Q | Quarterly report | May 8, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 7, 2025 | May 7, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 30, 2025 | — |
| CORRESP | Letter to the SEC | Apr 25, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 15, 2025 | — |
| UPLOAD | Letter from the SEC | Apr 11, 2025 | — |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 8-K |
Current report
Officer or director change
|
Mar 4, 2025 | Feb 28, 2025 |
| SD | Specialized disclosure (conflict minerals) | Feb 28, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| 10-Q | Quarterly report | Feb 6, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 5, 2025 | Feb 5, 2025 |
| 4 | Insider transaction | Jan 14, 2025 | Jan 13, 2025 |
| 144 | Notice of proposed sale | Jan 13, 2025 | — |
| 4 | Insider transaction | Jan 3, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Dec 13, 2024 | Dec 12, 2024 |
| 144 | Notice of proposed sale | Dec 12, 2024 | — |
| 4 | Insider transaction | Dec 5, 2024 | Dec 4, 2024 |
| 4 | Insider transaction | Dec 5, 2024 | Dec 5, 2024 |
| 144 | Notice of proposed sale | Dec 5, 2024 | — |
| 4 | Insider transaction | Dec 4, 2024 | Dec 3, 2024 |
| 4 | Insider transaction | Dec 4, 2024 | Dec 3, 2024 |
| 4 | Insider transaction | Dec 4, 2024 | Dec 3, 2024 |
| 144 | Notice of proposed sale | Dec 4, 2024 | — |
| 144 | Notice of proposed sale | Dec 3, 2024 | — |
| 4 | Insider transaction | Nov 25, 2024 | Nov 22, 2024 |
| 8-K |
Current report
Auditor change
|
Nov 25, 2024 | Nov 19, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Nov 12, 2024 | Nov 7, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 8, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 7, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 7, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 7, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 7, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 7, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 7, 2024 |
| 4 | Insider transaction | Nov 8, 2024 | Nov 7, 2024 |
| 10-Q | Quarterly report | Nov 5, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2024 | Nov 4, 2024 |
| 4 | Insider transaction | Oct 25, 2024 | Oct 24, 2024 |
| 144 | Notice of proposed sale | Oct 24, 2024 | — |
| ARS | Annual report to shareholders | Sep 25, 2024 | Jun 30, 2024 |
| DEFA14A | Additional proxy material | Sep 25, 2024 | — |
| DEF 14A | Proxy statement | Sep 25, 2024 | Jun 30, 2024 |
| 4 | Insider transaction | Sep 12, 2024 | Sep 11, 2024 |
| 144 | Notice of proposed sale | Sep 11, 2024 | — |
| 4 | Insider transaction | Aug 29, 2024 | Aug 28, 2024 |
| 4 | Insider transaction | Aug 23, 2024 | Aug 23, 2024 |
| 144 | Notice of proposed sale | Aug 23, 2024 | — |
| 10-K | Annual report | Aug 23, 2024 | Jun 30, 2024 |
| 4 | Insider transaction | Aug 15, 2024 | Aug 15, 2022 |
| 4 | Insider transaction | Aug 13, 2024 | Aug 12, 2024 |
| 144 | Notice of proposed sale | Aug 12, 2024 | — |
| 8-K |
Current report
Results of operations
|
Aug 7, 2024 | Aug 7, 2024 |
| 4 | Insider transaction | May 20, 2024 | May 10, 2024 |
| S-8 | Employee stock plan registration | May 8, 2024 | — |
| 10-Q | Quarterly report | May 8, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 7, 2024 | May 7, 2024 |
| 4 | Insider transaction | Apr 22, 2024 | Apr 22, 2024 |
| 144 | Notice of proposed sale | Apr 22, 2024 | — |
| 4 | Insider transaction | Mar 21, 2024 | Mar 20, 2024 |
| 144 | Notice of proposed sale | Mar 20, 2024 | — |
| 4 | Insider transaction | Mar 18, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 18, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 18, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 18, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 18, 2024 | Mar 15, 2024 |
| 4 | Insider transaction | Mar 13, 2024 | Mar 11, 2024 |
| 144 | Notice of proposed sale | Mar 13, 2024 | — |
| 144 | Notice of proposed sale | Mar 12, 2024 | — |
| 144 | Notice of proposed sale | Mar 11, 2024 | — |
| SD | Specialized disclosure (conflict minerals) | Mar 4, 2024 | — |
| 4 | Insider transaction | Feb 15, 2024 | Feb 14, 2024 |
| 144 | Notice of proposed sale | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2024 | — |
| 4 | Insider transaction | Feb 9, 2024 | Sep 6, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| 10-Q | Quarterly report | Feb 7, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 6, 2024 | Feb 6, 2024 |
| 4 | Insider transaction | Jan 30, 2024 | Jan 29, 2024 |
| 144 | Notice of proposed sale | Jan 29, 2024 | — |
| 8-K |
Current report
Other events
|
Jan 25, 2024 | Jan 25, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 23, 2024 | — |
| 4 | Insider transaction | Jan 19, 2024 | Jan 18, 2024 |
| 144 | Notice of proposed sale | Jan 19, 2024 | — |
| 4 | Insider transaction | Jan 16, 2024 | Jan 16, 2024 |
| 144 | Notice of proposed sale | Jan 16, 2024 | — |
| 4 | Insider transaction | Jan 5, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 5, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 5, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 5, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 5, 2024 | Jan 2, 2024 |
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
- AOSL (Nasdaq)
- Fiscal year ends
- June 30
- Headquarters
- Sunnyvale, CA
- SEC filer status
- Accelerated filer
- SEC CIK
- 1387467
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.