As of November 6, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Alpha and Omega Semiconductor Limited. The largest reported stake is Mike F. Chang's, at 13.9%. 6 filings are on record since August 14, 2025 (Schedule 13G/A, August 10, 2026).
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Key facts
- · Reporting person: Mike F. Chang · Sole voting: 3,436,169 · Shared voting: 776,032 · Sole dispositive: 3,436,169 · Shared dispositive: 776,032 · SCHEDULE 13G/A, 2026-08-10
- · Reporting person: State Street Corporation · Sole voting: 0 · Shared voting: 2,286,131 · Sole dispositive: 0 · Shared dispositive: 2,347,448 · SCHEDULE 13G, 2026-08-07
- · Reporting person: Dimensional Fund Advisors LP · Sole voting: 1,303,437 · Shared voting: 0 · Sole dispositive: 1,335,089 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-14
- · Holder: Dimensional Fund Advisors LP · Percent: 5.3% · SCHEDULE 13G/A
- · Holder: The Vanguard Group · Percent: 0% · SCHEDULE 13G/A
Alpha and Omega Semiconductor Limited has 6 Schedule 13D or 13G filings on record since 2025-08-14. 2 holders' latest filing reports 5% or more of common share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| 13.9% | 4,212,201 | SCHEDULE 13G/A, 2026-08-10 | 2026-06-30 | |
| State Street Corporation | 7.8% | 2,347,448 | SCHEDULE 13G, 2026-08-07 | 2026-06-30 |
| Dimensional Fund Advisors LP | 4.5% | 1,335,089 | SCHEDULE 13G/A, 2026-07-14 | 2026-06-30 |
| Hood River Capital Management LLC | 0% | 0 | SCHEDULE 13G/A, 2025-08-14 | 2025-06-30 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
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More on Alpha and Omega Semiconductor Limited and the records around it.
Alpha and Omega Semiconductor Limited elsewhere on the record
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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What the Full Report on Alpha and Omega Semiconductor Limited covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Mike F. Chang | 3,436,169 | 776,032 | 3,436,169 | 776,032 | SCHEDULE 13G/A, 2026-08-10 |
| State Street Corporation | 0 | 2,286,131 | 0 | 2,347,448 | SCHEDULE 13G, 2026-08-07 |
| Ssga Funds Management, Inc. | 0 | 1,763,410 | 0 | 1,766,810 | SCHEDULE 13G, 2026-08-07 |
| Dimensional Fund Advisors LP | 1,303,437 | 0 | 1,335,089 | 0 | SCHEDULE 13G/A, 2026-07-14 |
The latest filing identifies Alpha and Omega Semiconductor Limited by CUSIP G6331P104 and gives its principal executive office as 475 Oakmead Parkway, Sunnyvale, CA 94085 (SCHEDULE 13G/A, 2026-08-10).
What the percentages are based on
The Reporting Person beneficially owned approximately 13.9% of the outstanding common shares of the Issuer, which is calculated based on 30,253,076 common shares issued and outstanding as of June 30, 2026, as disclosed by the Issuer to the Reporting Person.Mike F. Chang, SCHEDULE 13G/A, 2026-08-10
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-14 | Hood River Capital Management LLC | 0% | SCHEDULE 13G/A |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-09 | Dimensional Fund Advisors LP | 5.3% | SCHEDULE 13G/A |
| 2026-07-14 | Dimensional Fund Advisors LP | 4.5% | SCHEDULE 13G/A |
| 2026-08-07 | State Street Corporation | 7.8% | SCHEDULE 13G |
| 2026-08-10 | Mike F. Chang | 13.9% | SCHEDULE 13G/A |
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.
Also on the record for Alpha and Omega Semiconductor Limited
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| April 17, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.