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 |
| S-8 | Employee stock plan registration | Aug 27, 2026 | — |
| 10-K | Annual report | Aug 27, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2026 | Aug 12, 2026 |
| 8-K |
Current report
Officer or director change
|
Jul 10, 2026 | Jul 8, 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 |
| 8-K |
Current report
Officer or director change
|
Apr 17, 2026 | Apr 13, 2026 |
| 8-K |
Current report
Officer or director change
|
Mar 9, 2026 | Mar 5, 2026 |
| SD | Specialized disclosure (conflict minerals) | Feb 27, 2026 | — |
| 10-Q | Quarterly report | Feb 5, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 5, 2026 | Feb 5, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Nov 17, 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 |
| 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 |
| S-8 | Employee stock plan registration | Aug 28, 2025 | — |
| 10-K | Annual report | Aug 28, 2025 | Jun 30, 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 | — |
| UPLOAD | Letter from the SEC | May 15, 2025 | — |
| 10-Q | Quarterly report | May 8, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 7, 2025 | May 7, 2025 |
| CORRESP | Letter to the SEC | Apr 25, 2025 | — |
| UPLOAD | Letter from the SEC | Apr 11, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Mar 4, 2025 | Feb 28, 2025 |
| SD | Specialized disclosure (conflict minerals) | Feb 28, 2025 | — |
| 10-Q | Quarterly report | Feb 6, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 5, 2025 | Feb 5, 2025 |
| 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 |
| 10-Q | Quarterly report | Nov 5, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2024 | Nov 4, 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 |
| 10-K | Annual report | Aug 23, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2024 | Aug 7, 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 |
| SD | Specialized disclosure (conflict minerals) | Mar 4, 2024 | — |
| 10-Q | Quarterly report | Feb 7, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 6, 2024 | Feb 6, 2024 |
| 8-K |
Current report
Other events
|
Jan 25, 2024 | Jan 25, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Nov 14, 2023 | Nov 9, 2023 |
| 10-Q | Quarterly report | Nov 7, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2023 | Nov 6, 2023 |
| ARS | Annual report to shareholders | Sep 25, 2023 | Jun 30, 2023 |
| DEFA14A | Additional proxy material | Sep 25, 2023 | — |
| DEF 14A | Proxy statement | Sep 25, 2023 | Jun 30, 2023 |
| 10-K | Annual report | Aug 29, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2023 | Aug 9, 2023 |
| 10-Q | Quarterly report | May 8, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 4, 2023 | May 4, 2023 |
| SD | Specialized disclosure (conflict minerals) | Mar 2, 2023 | — |
| UPLOAD | Letter from the SEC | Mar 1, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Feb 24, 2023 | Feb 23, 2023 |
| CORRESP | Letter to the SEC | Feb 14, 2023 | — |
| S-8 | Employee stock plan registration | Feb 8, 2023 | — |
| 10-Q | Quarterly report | Feb 8, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 6, 2023 | Feb 6, 2023 |
| UPLOAD | Letter from the SEC | Feb 3, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Dec 8, 2022 | Dec 6, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Dec 1, 2022 | Nov 29, 2022 |
| 10-Q | Quarterly report | Nov 7, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 3, 2022 | Nov 3, 2022 |
| DEF 14A | Proxy statement | Oct 13, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Auditor change
|
Oct 11, 2022 | Oct 5, 2022 |
| 10-K | Annual report | Sep 20, 2022 | Jun 30, 2022 |
| NT 10-K | Nt 10-k fy 2022 | Aug 30, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2022 | Aug 10, 2022 |
| 10-Q | Quarterly report | May 10, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 5, 2022 | May 5, 2022 |
| SD | Specialized disclosure (conflict minerals) | Mar 2, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Feb 28, 2022 | Feb 24, 2022 |
| 10-Q | Quarterly report | Feb 9, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 7, 2022 | Feb 7, 2022 |
| 8-K |
Current report
Other events
|
Jan 27, 2022 | Jan 26, 2022 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Regulation FD disclosure
|
Dec 7, 2021 | Dec 1, 2021 |
| S-8 | Employee stock plan registration | Nov 12, 2021 | — |
| 8-K |
Current report
Shareholder vote results
|
Nov 12, 2021 | Nov 11, 2021 |
| 10-Q | Quarterly report | Nov 5, 2021 | Sep 30, 2021 |
| DEFA14A | Additional proxy material | Nov 4, 2021 | — |
| 8-K |
Current report
Results of operations, Officer or director change
|
Nov 4, 2021 | Nov 4, 2021 |
| DEFA14A | Additional proxy material | Oct 25, 2021 | — |
| DEF 14A | Proxy statement | Oct 1, 2021 | Nov 11, 2021 |
| 10-K | Annual report | Aug 30, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Officer or director change
|
Aug 13, 2021 | Aug 12, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2021 | Aug 11, 2021 |
| 8-K |
Current report
Other events
|
Jun 8, 2021 | Jun 8, 2021 |
| 10-Q | Quarterly report | May 7, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 5, 2021 | May 5, 2021 |
| SD | Specialized disclosure (conflict minerals) | Mar 31, 2021 | — |
| 8-K |
Current report
Officer or director change
|
Mar 2, 2021 | Feb 25, 2021 |
| 10-Q | Quarterly report | Feb 8, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Officer or director change
|
Feb 5, 2021 | Feb 3, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 4, 2021 | Feb 4, 2021 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Nov 16, 2020 | Nov 12, 2020 |
| 10-Q | Quarterly report | Nov 6, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2020 | Nov 5, 2020 |
| DEFA14A | Additional proxy material | Oct 13, 2020 | — |
| 8-K |
Current report
Results of operations
|
Oct 5, 2020 | Oct 5, 2020 |
| DEFA14A | Additional proxy material | Sep 28, 2020 | — |
| DEF 14A | Proxy statement | Sep 28, 2020 | Nov 12, 2020 |
| PRE 14A | Preliminary proxy statement | Sep 18, 2020 | Nov 12, 2020 |
| 10-K | Annual report | Sep 2, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Officer or director change
|
Aug 17, 2020 | Aug 12, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2020 | Aug 11, 2020 |
| SD | Specialized disclosure (conflict minerals) | Jun 12, 2020 | — |
| 10-Q | Quarterly report | May 11, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations
|
May 5, 2020 | May 5, 2020 |
| UPLOAD | Letter from the SEC | Feb 27, 2020 | — |
| CORRESP | Letter to the SEC | Feb 26, 2020 | — |
| UPLOAD | Letter from the SEC | Feb 18, 2020 | — |
| 10-Q | Quarterly report | Feb 10, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Results of operations
|
Feb 5, 2020 | Feb 5, 2020 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Nov 12, 2019 | Nov 7, 2019 |
| 10-Q | Quarterly report | Nov 12, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2019 | Nov 4, 2019 |
| DEF 14A | Proxy statement | Oct 7, 2019 | Nov 8, 2019 |
| 10-K | Annual report | Aug 23, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2019 | Aug 7, 2019 |
| CT ORDER | Filing | Jul 23, 2019 | — |
| SD | Specialized disclosure (conflict minerals) | May 13, 2019 | — |
| 8-K |
Current report
Officer or director change
|
May 9, 2019 | May 6, 2019 |
| 10-Q | Quarterly report | May 3, 2019 | Mar 31, 2019 |
| 8-K |
Current report
Results of operations
|
May 2, 2019 | May 2, 2019 |
| 10-Q | Quarterly report | Feb 7, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Results of operations
|
Feb 6, 2019 | Feb 6, 2019 |
| 8-K |
Current report
Shareholder vote results
|
Nov 13, 2018 | Nov 8, 2018 |
| S-8 POS | S-8 pos 2018 (6) | Nov 9, 2018 | — |
| S-8 POS | S-8 pos 2018 (5) | Nov 9, 2018 | — |
| S-8 POS | S-8 pos 2018 (4) | Nov 9, 2018 | — |
| S-8 POS | S-8 pos 2018 (3) | Nov 9, 2018 | — |
| S-8 POS | S-8 pos 2018 #2 | Nov 9, 2018 | — |
| S-8 POS | S-8 pos 2018 | Nov 9, 2018 | — |
| S-8 | Employee stock plan registration | Nov 9, 2018 | — |
| 10-Q | Quarterly report | Nov 5, 2018 | Sep 30, 2018 |
| 8-K |
Current report
Results of operations
|
Nov 1, 2018 | Nov 1, 2018 |
| DEF 14A | Proxy statement | Oct 9, 2018 | Nov 9, 2018 |
| 8-K |
Current report
Auditor change
|
Sep 17, 2018 | Sep 11, 2018 |
| CT ORDER | Filing | Aug 30, 2018 | — |
| CT ORDER | Filing | Aug 30, 2018 | — |
| 10-K | Annual report | Aug 23, 2018 | Jun 30, 2018 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2018 | Aug 8, 2018 |
| 8-K/A |
Amended current report
Material agreement
|
May 25, 2018 | May 9, 2018 |
| SD | Specialized disclosure (conflict minerals) | May 15, 2018 | — |
| 8-K |
Current report
Material agreement
|
May 11, 2018 | May 9, 2018 |
| 10-Q | Quarterly report | May 3, 2018 | Mar 31, 2018 |
| 8-K |
Current report
Results of operations
|
May 2, 2018 | May 2, 2018 |
| 10-Q | Quarterly report | Feb 8, 2018 | Dec 31, 2017 |
| 8-K |
Current report
Results of operations
|
Feb 7, 2018 | Feb 7, 2018 |
| CT ORDER | Filing | Dec 21, 2017 | — |
| 8-K |
Current report
Officer or director change
|
Nov 21, 2017 | Nov 15, 2017 |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
Nov 14, 2017 | Nov 8, 2017 |
| 10-Q | Quarterly report | Nov 9, 2017 | Sep 30, 2017 |
| 8-K |
Current report
Results of operations
|
Nov 2, 2017 | Nov 2, 2017 |
| DEF 14A | Proxy statement | Oct 3, 2017 | Nov 9, 2017 |
| PRE 14A | Preliminary proxy statement | Sep 20, 2017 | Nov 9, 2017 |
| 10-K | Annual report | Sep 5, 2017 | Jun 30, 2017 |
| CT ORDER | Filing | Aug 22, 2017 | — |
| 8-K |
Current report
Results of operations
|
Aug 9, 2017 | Aug 9, 2017 |
| CT ORDER | Filing | May 22, 2017 | — |
| SD | Specialized disclosure (conflict minerals) | May 19, 2017 | — |
| 10-Q | Quarterly report | May 4, 2017 | Mar 31, 2017 |
| 8-K |
Current report
Results of operations
|
May 3, 2017 | May 3, 2017 |
| 8-K |
Current report
Officer or director change
|
Mar 7, 2017 | Mar 1, 2017 |
| CT ORDER | Filing | Feb 28, 2017 | — |
| 10-Q | Quarterly report | Feb 9, 2017 | Dec 31, 2016 |
| UPLOAD | Letter from the SEC | Feb 9, 2017 | — |
| 8-K |
Current report
Results of operations
|
Feb 8, 2017 | Feb 8, 2017 |
| CORRESP | Letter to the SEC | Feb 1, 2017 | — |
| 10-K/A | Amended annual report | Feb 1, 2017 | Jun 30, 2016 |
| UPLOAD | Letter from the SEC | Jan 27, 2017 | — |
| 8-K |
Current report
Material agreement
|
Jan 17, 2017 | Jan 10, 2017 |
| EFFECT | Filing | Jan 13, 2017 | — |
| CORRESP | Letter to the SEC | Jan 13, 2017 | — |
| CORRESP | Letter to the SEC | Jan 12, 2017 | — |
| CT ORDER | Filing | Jan 12, 2017 | — |
| S-3/A | Amendment no. 1 to form s-3 | Jan 11, 2017 | — |
| S-3 | Shelf registration | Nov 17, 2016 | — |
| 8-K |
Current report
Shareholder vote results
|
Nov 14, 2016 | Nov 9, 2016 |
| 10-Q | Quarterly report | Nov 7, 2016 | Sep 30, 2016 |
| 8-K |
Current report
Results of operations
|
Nov 3, 2016 | Nov 3, 2016 |
| DEF 14A | Proxy statement | Oct 3, 2016 | Nov 10, 2016 |
| 10-K | Annual report | Aug 26, 2016 | Jun 30, 2016 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2016 | Aug 10, 2016 |
| CT ORDER | Filing | Jul 20, 2016 | — |
| SD | Specialized disclosure (conflict minerals) | May 19, 2016 | — |
| 10-Q | Quarterly report | May 10, 2016 | Mar 31, 2016 |
| 8-K |
Current report
Results of operations
|
May 4, 2016 | May 4, 2016 |
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
Other Semiconductors & Related Devices companies
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.