Alpha and Omega Semiconductor Limited (AOSL)
Nasdaq: AOSL · Semiconductors & Related Devices · Sunnyvale, CA · filing with the SEC since 2007
Grade4.5
◀ Past 4.7● Present 5.0▶ Future 3.8
Who owns Alpha and Omega Semiconductor Limited
As filed with the SECHolders of 5% or more
3
Mike F. Chang holds 13.9% of Common Share, as its SCHEDULE 13G/A filed Aug 10, 2026 says.
Directors and officers
13
report now, of 16 people on the record since 2011. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
Mike F. Chang
SCHEDULE 13G/A · filed Aug 10, 2026 · Common Share · 14.1% in Feb 12, 2025
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 30, 2025 · Common Stock
State Street Corporation
SCHEDULE 13G · filed Aug 7, 2026 · COMMON STOCK
Dimensional Fund Advisors LP
SCHEDULE 13G/A · filed Jul 14, 2026 · Common Stock · reported falling below 5%, from 5.3% in Apr 9, 2026
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%
Hood River Capital Management LLC
SCHEDULE 13G/A · filed Aug 14, 2025 · Common Stock · reported falling below 5%, from 6.75% in May 15, 2025
What AOSL reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Facility in Liangjiang New Area of Chongqing (the 'Joint Venture')
An entity · legal entity · owns, named in the 10-K filed Aug 27, 2026
JV Company
An investee · investee · invested in, named in the 10-K filed Aug 27, 2026
19 subsidiaries in 11 countries, from the list filed with the 10-K filed Aug 27, 2026.
Insider tradesForm 4
19sales
1purchases
19sales on a scheduled plan
4people selling
$2.7Msold, in dollars
$600,000bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window5 of 16 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Liang Yifan | CFO and Corp Secretary | 4 | $1.1M | 4 | 0 | $0 |
| Chang Stephen Chunping | Chief Executive Officer | 4 | $700,000 | 4 | 0 | $0 |
| Xue Bing | EVP-WW Sales & Bus Development | 9 | $700,000 | 9 | 0 | $0 |
| Chen Claudia | director | 2 | $200,000 | 2 | 0 | $0 |
| Chang Mike F | Chairman of Board | 0 | $0 | 0 | 1 | $600,000 |