Alpha & Omega Semiconductor Ltd
AOSL- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0001387467
In the last 90 days, Alpha & Omega Semiconductor Ltd insiders filed 0 open-market purchases and 1 sale; 216 institutions reported holding it in 13F filings for Q2 2026, worth $1.08B in total; no superinvestor holds it.
Holders of 5% or more of AOSL
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Alpha & Omega Semiconductor Ltd, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Chang Mike F | 13G/A | 14.10%4.13M shares | – | Feb 12, 20251 filing | Feb 12, 2025 | SEC |
| BlackRock, Inc. | 13G/A | 12.70%3.74M shares | – | Apr 30, 20251 filing | Apr 30, 2025 | SEC |
| Dimensional Fund Advisors LP | 13G/A | 6.30%1.84M shares | – | Apr 15, 20251 filing | Apr 15, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
6 Schedule 13D and 13G filings on Alpha & Omega Semiconductor Ltd, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 26, 20263:26 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Aug 14, 20256:12 AM ET | Hood River Capital Management LLC | 13G/A | 0.00%0 shares | −6.75 ppfrom 6.75%Below 5% | Jun 30, 2025 | SEC |
| May 15, 20258:00 AM ET | Hood River Capital Management LLC | 13G | 6.75%1.99M shares | New | Mar 31, 2025 | SEC |
| Apr 30, 20258:18 AM ET | BlackRock, Inc. | 13G/A | 12.70%3.74M shares | – | Mar 31, 2025 | SEC |
| Apr 15, 202512:18 PM ET | Dimensional Fund Advisors LP | 13G/A | 6.30%1.84M shares | – | Mar 31, 2025 | SEC |
| Feb 12, 20254:01 PM ET | Chang Mike F | 13G/A | 14.10%4.13M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Alpha & Omega Semiconductor Ltd shares.
No Form 144 notices for Alpha & Omega Semiconductor Ltd are on file.