Security key
G6331P104
ALPHA & OMEGA SEMICONDUCTOR Ltd - Common Stock (AOSL)
CUSIP: G6331P104
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 22,141,045
- Total 13F value
- $490,134,876
- Share change
- -378,642
- Put/Call ratio
- 315%
- SEC-reported price per share
- $22.16
- Number of holders
- 178
- Value change
- -$5,832,265
- Number of buys
- 85
- Number of sells
- 69
- Shares outstanding
- 29,507,000
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
178
Top holders
10
AOSL full security history
Ownership snapshot
Full 13F holder table
Previous quarter: Q4 2025
ALPHA & OMEGA SEMICONDUCTOR Ltd SEC filings
ALPHA & OMEGA SEMICONDUCTOR Ltd company facts
Broader feeds
Reporting periods
Holder history for CUSIP G6331P104
Recent filing periods:
Ownership snapshot
Top reported holders of AOSL - ALPHA & OMEGA SEMICONDUCTOR Ltd - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Mike F. Chang
Disclosed value leader
Mike F. Chang
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 14%
13D/G row: Mike F. Chang
Showing 1-6 of 15 holder rows.
Quick read
Mike F. Chang leads the comparable SEC ownership view at 14%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Mike F. Chang's linked filing trail.
Comparable ownership
Top 5
Mike F. Chang
14%
BlackRock, Inc.
13%
DIMENSIONAL FUND ADVISORS LP
5.3%
Wenjun Li
0.29%
King Owyang
0.26%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Mike F. Chang |
13D/G
|
14%
|
$78,838,210
4,127,655 shares
|
$0 | 31 Dec 2024 |
| BlackRock, Inc. |
13F
13D/G
Company
|
13%
from 13D/G
|
$77,435,131
3,908,891 shares
|
— | 31 Dec 2025 |
| DIMENSIONAL FUND ADVISORS LP |
13D/G
13F
Company
|
5.3%
|
$34,655,381
1,563,871 shares
|
-$6,155,959 | 31 Mar 2026 |
| Wenjun Li |
3/4/5
Chief Operating Officer
|
0.29%
|
$1,714,713
86,558 shares
|
— | 16 Mar 2026 |
| King Owyang |
3/4/5
Director
|
0.26%
|
$2,104,157
75,256 shares
|
— | 11 Nov 2025 |
| Michael L. Pfeiffer |
3/4/5
Director
|
0.24%
|
$1,993,380
71,294 shares
|
— | 11 Nov 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
178
Shares
22,141,045
Rows available
178
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
166
Q1 2026 holders
178
Holder diff
12
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend