Latest Period
Q1 2026
Security Snapshot
ALPHA & OMEGA SEMICONDUCTOR Ltd - Common Stock (AOSL) Institutional Ownership
CUSIP: G6331P104
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
178
Shares (Excl. Options)
22,141,045
Price
$22.16
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- Security type / class
- Equity / Common Stock
- Symbol
- AOSL on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 22,141,045
- Total 13F value
- $490,134,876
- Portfolio coverage rank
- 0%
- Share change
- -378,642
- Value change
- -$5,832,265
- Number of holders
- 178
- Shares outstanding
- 29,507,000
- SEC-reported price per share
- $41.59
- Insider filing price
- $41.59
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- AOSL - ALPHA & OMEGA SEMICONDUCTOR Ltd - Common Stock is tracked under CUSIP G6331P104.
- 178 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 166 to 178 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $444,237,163 to $490,134,876.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 178 institutions filings for Q1 2026.
Security key
G6331P104
Latest holder period
Q1 2026
13F holders
178
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
AOSL full holder history
ALPHA & OMEGA SEMICONDUCTOR Ltd SEC filings
ALPHA & OMEGA SEMICONDUCTOR Ltd company facts
ALPHA & OMEGA SEMICONDUCTOR Ltd insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G6331P104:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
3
Security
AOSL
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Chang Mike F | 14% | $78,838,210 | 4,127,655 | Mike F. Chang | 31 Dec 2024 | |||
| BlackRock, Inc. | 13% | $71,341,785 | 3,735,172 | BlackRock, Inc. | 31 Mar 2025 | |||
| DIMENSIONAL FUND ADVISORS LP | 5.3% | -17% | $34,655,381 | -$6,155,959 | 1,563,871 | -15% | Dimensional Fund Advisors LP | 31 Mar 2026 |
As of 31 Mar 2026, 178 institutional investors reported holding 22,141,045 shares of ALPHA & OMEGA SEMICONDUCTOR Ltd - Common Stock (AOSL). This represents 75% of the company’s total 29,507,000 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
60%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 13% | 3,904,776 | -0.11% | 0% | $86,529,837 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | 5.3% | 1,574,462 | -3.3% | 0.03% | $34,890,078 |
| DIMENSIONAL FUND ADVISORS LP | 5.3% | 1,563,871 | -1.3% | 0.01% | $34,652,922 |
| STATE STREET CORP | 4.7% | 1,401,550 | -4.9% | 0% | $31,058,348 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4% | 1,168,929 | 0% | 0% | $25,903,467 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.6% | 1,051,231 | 0% | 0% | $23,295,279 |
| WELLINGTON MANAGEMENT GROUP LLP | 2.4% | 694,808 | -32% | 0% | $15,396,945 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1% | 628,668 | +2.9% | 0% | $13,934,045 |
| TWO SIGMA INVESTMENTS, LP | 1.9% | 553,011 | +99% | 0.01% | $12,254,724 |
| FMR LLC | 1.8% | 544,709 | +5.7% | 0% | $12,070,759 |
| WEBER CAPITAL MANAGEMENT LLC /ADV | 1.8% | 542,308 | -0.91% | 12% | $12,017,545 |
| ROYCE & ASSOCIATES LP | 1.8% | 518,115 | +9.3% | 0.11% | $11,481,428 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.4% | 420,427 | +6.8% | 0% | $9,316,662 |
| Invesco Ltd. | 1.3% | 375,773 | -1.6% | 0% | $8,327,129 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 1.2% | 353,914 | +184% | 0.03% | $7,842,734 |
| JPMORGAN CHASE & CO | 1.2% | 344,032 | +45% | 0% | $7,166,187 |
| Connor, Clark & Lunn Investment Management Ltd. | 1.1% | 336,716 | +65% | 0.02% | $7,461,627 |
| D. E. Shaw & Co., Inc. | 0.95% | 279,588 | +74% | 0% | $6,195,670 |
| GOLDMAN SACHS GROUP INC | 0.91% | 267,682 | -40% | 0% | $5,931,833 |
| NORTHERN TRUST CORP | 0.84% | 246,790 | +4.6% | 0% | $5,468,866 |
| ACADIAN ASSET MANAGEMENT LLC | 0.71% | 210,640 | +58% | 0.01% | $4,662,000 |
| MILLENNIUM MANAGEMENT LLC | 0.67% | 197,782 | +230% | 0% | $4,382,849 |
| MORGAN STANLEY | 0.67% | 196,895 | -14% | 0% | $4,363,204 |
| UBS Group AG | 0.64% | 188,740 | -13% | 0% | $4,182,478 |
| Trexquant Investment LP | 0.59% | 174,100 | +15% | 0.03% | $3,858,056 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 22,141,045 | $490,134,876 | -$5,832,265 | $22.16 | 178 |
| 2025 Q4 | 22,419,287 | $444,237,163 | -$20,760,977 | $19.81 | 166 |
| 2025 Q3 | 22,139,159 | $618,972,934 | +$12,322,001 | $27.96 | 183 |
| 2025 Q2 | 21,713,945 | $557,181,406 | -$21,502,941 | $25.66 | 162 |
| 2025 Q1 | 22,643,486 | $562,839,969 | +$19,669,271 | $24.86 | 154 |
| 2024 Q4 | 20,527,876 | $760,129,440 | +$35,310,006 | $37.03 | 175 |
| 2024 Q3 | 19,547,024 | $725,692,788 | +$457,886 | $37.12 | 170 |
| 2024 Q2 | 19,484,925 | $728,150,135 | +$25,089,031 | $37.37 | 167 |
| 2024 Q1 | 19,132,588 | $421,680,236 | +$22,060,570 | $22.04 | 139 |
| 2023 Q4 | 18,128,150 | $472,537,779 | +$16,052,328 | $26.06 | 142 |
| 2023 Q3 | 17,457,863 | $520,908,409 | +$2,752,038 | $29.84 | 139 |
| 2023 Q2 | 17,411,579 | $570,926,195 | -$3,947,987 | $32.80 | 144 |
| 2023 Q1 | 17,512,856 | $471,906,972 | -$7,678,298 | $26.95 | 142 |
| 2022 Q4 | 17,779,705 | $508,010,087 | -$19,400,324 | $28.57 | 160 |
| 2022 Q3 | 18,449,500 | $567,553,851 | +$8,894,879 | $30.76 | 163 |
| 2022 Q2 | 18,088,046 | $603,143,415 | +$62,506,955 | $33.34 | 175 |
| 2022 Q1 | 15,658,066 | $855,735,351 | +$30,606,390 | $54.65 | 199 |
| 2021 Q4 | 14,999,468 | $905,418,613 | +$7,097,497 | $60.56 | 175 |
| 2021 Q3 | 14,915,454 | $467,434,662 | -$8,201,150 | $31.37 | 128 |
| 2021 Q2 | 15,181,862 | $461,385,113 | -$11,593,861 | $30.39 | 124 |
| 2021 Q1 | 15,501,369 | $506,892,464 | +$7,830,300 | $32.70 | 125 |
| 2020 Q4 | 15,279,384 | $361,212,567 | +$7,128,506 | $23.64 | 98 |
| 2020 Q3 | 15,007,889 | $192,563,771 | -$5,796,971 | $12.82 | 79 |
| 2020 Q2 | 15,462,010 | $168,210,106 | +$2,964,497 | $10.88 | 72 |
| 2020 Q1 | 15,445,273 | $99,002,189 | -$976,657 | $6.41 | 77 |