As of November 7, 2026, Alpha and Omega Semiconductor Limited is a publicly traded company (Nasdaq: AOSL); its largest reported holder is State Street, with 7.8% on Schedule 13G of August 7, 2026. The largest insider holding is Mike F. Chang, a director and 10% owner, with 4,259,379 shares (14.1% of shares outstanding), per Form 4 of September 11, 2026 (Schedule 13G, August 7, 2026).
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Is Alpha and Omega Semiconductor Limited a real, registered company?
- Alpha and Omega Semiconductor Limited files with the SEC under CIK 1387467 (its SEC filings).
- Its shares are listed under the ticker AOSL on Nasdaq (SEC company record).
- business address in Sunnyvale, California, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Alpha and Omega Semiconductor Limited in our court records and SEC 8-K records (as of 2026-11-07).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Mike F. Chang (filed 2026-08-10).
Who are Alpha and Omega Semiconductor Limited's owners and officers?
Alpha and Omega Semiconductor Limited: business address in Sunnyvale, California; industry Semiconductors & Related Devices (Schedule 13G/A, 2026-08-10).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-08-10 | Mike F. Chang | 13.9% |
| Schedule 13G, 2026-08-07 | State Street Corporation | 7.8% |
| Schedule 13G/A, 2026-07-14 | Dimensional Fund Advisors LP | 4.5% |
| Schedule 13G/A, 2026-04-09 | Dimensional Fund Advisors LP | 5.3% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2025-08-14 | Hood River Capital Management LLC | 0% |
Questions about who owns Alpha and Omega Semiconductor Limited
Who owns Alpha and Omega Semiconductor Limited?
On this page, 2 holders' latest ownership filings report 5% or more of Alpha and Omega Semiconductor Limited: Mike F. Chang (13.9%, Schedule 13G/A, filed 2026-08-10) and State Street Corporation (7.8%, Schedule 13G, filed 2026-08-07).
Who are the largest shareholders of Alpha and Omega Semiconductor Limited?
By the share each holder's latest filing reports, the largest holders of Alpha and Omega Semiconductor Limited on this page are Mike F. Chang (13.9%) and State Street Corporation (7.8%).
When did Mike F. Chang buy into Alpha and Omega Semiconductor Limited?
The filings give report dates, not purchase dates. The earliest filing from Mike F. Chang on this page is the Schedule 13G/A, filed 2026-08-10, reporting 13.9%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 6 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
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Warning Bells
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Which insiders own Alpha and Omega Semiconductor Limited shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , a director and 10% owner: 4,259,379 shares (14.1% of shares outstanding), 560,540 held directly and 3,698,839 indirectly (Form 4, 2026-09-11).
- , the chief executive and a director: 735,017 shares (2.4% of shares outstanding), 634,070 held directly and 100,947 indirectly (Form 4, 2026-09-11).
- , the chief financial officer and corp secretary: 269,403 shares (0.89% of shares outstanding) (Form 4, 2026-04-30).
- , the executive vice president-ww sales and bus development: 122,785 shares (0.41% of shares outstanding) (Form 4, 2026-07-17).
- , the chief operating officer: 86,558 shares (0.29% of shares outstanding) (Form 4/A, 2026-03-25).
Shares outstanding: 30,314,400 as of 2026-10-30, from the company's latest SEC cover page.
How much has Alpha and Omega Semiconductor Limited raised?
Acquisitions reported on Form 8-K, Item 2.01: completed an acquisition (2026-05-12).
Keep reading
More on Alpha and Omega Semiconductor Limited and the records around it.
Alpha and Omega Semiconductor Limited elsewhere on the record
- 5%+ stake filings Aug 2026
Companies that share a holder
- Hood River Capital Management LLC also filed stake reports on 19 other companies: Butterfly Network Inc. (Aug 2026), Camping World Holdings, Inc. (Aug 2026), Kura Sushi USA Inc. (Aug 2026)
- STATE STREET CORPORATION also filed stake reports on 343 other companies: TRADE DESK INC/THE (Oct 2026), CENTRUS ENERGY CORP (Sep 2026), ACADIA PHARMACEUTICALS INC (Aug 2026)
- Dimensional Fund Advisors LP also filed stake reports on 366 other companies: Acadia Healthcare Co Inc (Oct 2026), ADT Inc (Oct 2026), AGCO Corp (Oct 2026)
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