ALPHA & OMEGA SEMICONDUCTOR (AOSL)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
203
Reporting holders
$1.2B
Reported value
75.9%
Of shares outstanding
6.9%
Held as options
+33
Holder change
Institutions report 22,726,768 shares against 29,929,578 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. Share count carried from an earlier filing (concept 2026-04-30).
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $201.5M | 4,256,528 | 0.00% | 8q | +9.0%+$16.6M |
| STATE STREET CORP | $111.1M | 2,347,448 | 0.00% | 31q | +67.5%+$44.8M |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $65.1M | 1,375,083 | 0.05% | 29q | -12.7%-$9.4M |
| DIMENSIONAL FUND ADVISORS LP | $63.2M | 1,335,089 | 0.01% | 31q | -14.6%-$10.8M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $52.6M | 1,111,480 | 0.00% | 2q | -4.9%-$2.7M |
| VANGUARD CAPITAL MANAGEMENT LLC | $50.7M | 1,070,895 | 0.00% | 2q | +1.9%+$930.7K |
| JANE STREET GROUP, LLC | $46.4M | 234,335 | 0.00% | 11q | HELD |
| TWO SIGMA INVESTMENTS, LP | $45.0M | 951,576 | 0.03% | 8q | +72.1%+$18.9M |
| FMR LLC | $37.5M | 791,715 | 0.00% | 31q | +45.3%+$11.7M |
| GEODE CAPITAL MANAGEMENT, LLC | $31.2M | 658,902 | 0.00% | 31q | +4.8%+$1.4M |
| Connor, Clark & Lunn Investment Management Ltd. | $30.1M | 636,893 | 0.06% | 13q | +89.1%+$14.2M |
| WEBER CAPITAL MANAGEMENT LLC /ADV | $25.5M | 538,437 | 21.69% | 3q | -0.7%-$183.2K |
| CITADEL ADVISORS LLC | $22.5M | 39,368 | 0.00% | 23q | +8.1%+$1.7M |
| WELLINGTON MANAGEMENT GROUP LLP | $19.5M | 412,910 | 0.00% | 13q | -40.6%-$13.3M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $19.1M | 403,197 | 0.00% | 31q | -4.1%-$815.5K |
| Sixth Street Partners Management Company, L.P. | $19.1M | 403,197 | 0.00% | new | NEW |
| MILLENNIUM MANAGEMENT LLC | $15.0M | 267,648 | 0.01% | 5q | +35.3%+$3.9M |
| ROYCE & ASSOCIATES LP | $14.6M | 309,015 | 0.12% | 31q | -40.4%-$9.9M |
| D. E. Shaw & Co., Inc. | $13.5M | 284,225 | 0.01% | 3q | +1.7%+$219.5K |
| GOLDMAN SACHS GROUP INC | $13.2M | 279,113 | 0.00% | 28q | +4.3%+$541.0K |
| NORTHERN TRUST CORP | $12.4M | 261,018 | 0.00% | 31q | +5.8%+$673.4K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $12.0M | 96,522 | 0.00% | 24q | +131.3%+$6.8M |
| MORGAN STANLEY | $10.3M | 217,176 | 0.00% | 35q | +10.3%+$959.9K |
| Invesco Ltd. | $9.8M | 207,842 | 0.00% | 31q | -44.7%-$7.9M |
| Apis Capital Advisors, LLC | $9.8M | 206,280 | 0.95% | new | NEW |
| CONGRESS ASSET MANAGEMENT CO | $9.6M | 203,460 | 0.06% | new | NEW |
| PANAGORA ASSET MANAGEMENT INC | $9.2M | 194,356 | 0.03% | 2q | +230.6%+$6.4M |
| IMC-Chicago, LLC | $8.1M | 99,791 | 0.00% | new | NEW |
| Public Sector Pension Investment Board | $8.1M | 170,742 | 0.01% | 17q | +93.2%+$3.9M |
| VANGUARD FIDUCIARY TRUST CO | $7.7M | 163,428 | 0.00% | 2q | HELD |
| JACOBS LEVY EQUITY MANAGEMENT, INC | $7.6M | 160,918 | 0.03% | 3q | -54.5%-$9.1M |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $7.1M | 149,537 | 0.12% | 31q | +6.6%+$435.7K |
| BANK OF AMERICA CORP /DE/ | $6.9M | 145,243 | 0.00% | 31q | +13.7%+$830.7K |
| TUDOR INVESTMENT CORP ET AL | $6.8M | 144,312 | 0.01% | 5q | +107.5%+$3.5M |
| Bank of New York Mellon Corp | $6.7M | 141,445 | 0.00% | 31q | +1.4%+$90.4K |
| UBS Group AG | $6.4M | 135,116 | 0.00% | 31q | -28.4%-$2.5M |
| CITIGROUP INC | $6.3M | 61,099 | 0.00% | 31q | +802.6%+$5.6M |
| Empowered Funds, LLC | $6.1M | 129,537 | 0.03% | 4q | +7.7%+$435.7K |
| PRINCIPAL FINANCIAL GROUP INC | $5.7M | 120,056 | 0.00% | 19q | HELD |
| Trexquant Investment LP | $5.6M | 117,474 | 0.03% | 4q | -32.5%-$2.7M |
| JPMORGAN CHASE & CO | $5.0M | 109,566 | 0.00% | 31q | -68.2%-$10.6M |
| GROUP ONE TRADING LLC | $4.9M | options only | 0.01% | 2q | OPTIONS |
| WEDGE CAPITAL MANAGEMENT L L P/NC | $4.3M | 91,440 | 0.07% | 2q | -18.8%-$999.3K |
| AQR CAPITAL MANAGEMENT LLC | $3.9M | 83,433 | 0.00% | 6q | -41.1%-$2.8M |
| BNP PARIBAS FINANCIAL MARKETS | $3.6M | 76,044 | 0.00% | 31q | -27.8%-$1.4M |
| RHUMBLINE ADVISERS | $2.9M | 61,676 | 0.00% | 31q | -14.4%-$490.8K |
| AMERICAN CENTURY COMPANIES INC | $2.9M | 61,255 | 0.00% | 23q | +5.0%+$138.7K |
| Nuveen, LLC | $2.6M | 55,668 | 0.00% | 6q | +15.0%+$343.2K |
| Russell Investments Group, Ltd. | $2.6M | 55,849 | 0.00% | 28q | +63.9%+$1.0M |
| ALGERT GLOBAL LLC | $2.6M | 54,200 | 0.03% | 5q | -77.5%-$8.8M |
| Legal & General Group Plc | $2.6M | 54,126 | 0.00% | 31q | -4.7%-$126.8K |
| DEUTSCHE BANK AG\ | $2.5M | 52,853 | 0.00% | 34q | +6.7%+$156.7K |
| Swiss National Bank | $2.3M | 49,300 | 0.00% | 21q | -2.2%-$52.1K |
| AMERIPRISE FINANCIAL INC | $2.2M | 47,029 | 0.00% | 19q | -56.4%-$2.9M |
| SIMPLEX TRADING, LLC | $2.1M | 5,452 | 0.00% | 24q | +8.6%+$169.3K |
| FRANKLIN RESOURCES INC | $1.9M | 40,523 | 0.00% | 15q | -28.1%-$748.3K |
| XTX Topco Ltd | $1.8M | 37,562 | 0.02% | 3q | +63.8%+$692.3K |
| Quantinno Capital Management LP | $1.7M | 36,440 | 0.00% | 5q | -2.2%-$38.2K |
| WINTON GROUP Ltd | $1.7M | 34,889 | 0.05% | 12q | -42.7%-$1.2M |
| Numerai GP LLC | $1.6M | 32,941 | 0.13% | 5q | -66.4%-$3.1M |
| Mork Capital Management, LLC | $1.4M | 30,000 | 0.91% | 31q | -33.3%-$710.0K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $1.4M | 29,005 | 0.00% | new | NEW |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $1.3M | 26,638 | 0.00% | 3q | -3.8%-$50.3K |
| New Age Alpha Advisors, LLC | $1.2M | 24,986 | 0.05% | new | NEW |
| Counterpoint Mutual Funds LLC | $1.2M | 24,712 | 0.12% | 2q | -37.6%-$703.7K |
| RAYMOND JAMES FINANCIAL INC | $1.1M | 23,317 | 0.00% | 7q | -2.1%-$23.6K |
| Y-Intercept (Hong Kong) Ltd | $1.1M | 22,218 | 0.02% | 2q | -37.2%-$622.5K |
| Marex Group Ltd | $1.0M | 21,500 | 0.00% | new | NEW |
| Dynamic Technology Lab Private Ltd | $1.0M | 21,440 | 0.23% | new | NEW |
| WELLS FARGO & COMPANY/MN | $1.0M | 21,414 | 0.00% | 31q | +6.3%+$60.1K |
| Creative Planning | $999.0K | 21,107 | 0.00% | 2q | +32.5%+$245.3K |
| NATIXIS | $946.6K | 20,000 | 0.00% | 3q | HELD |
| Jump Financial, LLC | $937.1K | 19,800 | 0.01% | 2q | -52.3%-$1.0M |
| Walleye Trading LLC | $907.7K | 18,979 | 0.00% | new | NEW |
| NEUBERGER BERMAN GROUP LLC | $902.3K | 19,063 | 0.00% | 2q | HELD |
| Brevan Howard Capital Management LP | $780.1K | 16,483 | 0.01% | 2q | -14.0%-$127.2K |
| Louisiana State Employees Retirement System | $759.7K | 21,900 | 0.01% | 17q | +99.1%+$378.1K |
| ALLIANCEBERNSTEIN L.P. | $746.7K | 33,698 | 0.00% | 31q | +64.4%+$292.5K |
| VANGUARD ASSET MANAGEMENT, Ltd | $734.7K | 15,523 | 0.00% | 2q | HELD |
| Illinois Municipal Retirement Fund | $726.9K | 15,358 | 0.01% | 12q | +24.0%+$140.8K |
| Arosa Capital Management LP | $710.0K | 15,000 | 0.13% | 3q | -50.0%-$710.0K |
| Capelight Capital Asset Management LP | $710.0K | 15,000 | 0.34% | new | NEW |
| MetLife Investment Management, LLC | $684.4K | 14,460 | 0.00% | 11q | +1.0%+$6.8K |
| Jupiter Topco LLC | $637.9K | 13,485 | 0.00% | new | FIRST |
| Zurcher Kantonalbank (Zurich Cantonalbank) | $626.3K | 13,232 | 0.00% | 19q | +56.7%+$226.6K |
| DIVERSIFIED TRUST CO | $611.1K | 12,912 | 0.01% | new | NEW |
| Engineers Gate Manager LP | $579.8K | 12,250 | 0.01% | 5q | -80.6%-$2.4M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $539.1K | 11,391 | 0.00% | 9q | -4.5%-$25.2K |
| Vanguard Global Advisers, LLC | $530.5K | 11,209 | 0.00% | 2q | -46.7%-$464.5K |
| NEW YORK STATE COMMON RETIREMENT FUND | $477.8K | 10,096 | 0.00% | 31q | +29.5%+$108.9K |
| SEI INVESTMENTS CO | $424.3K | 8,964 | 0.00% | 19q | -89.3%-$3.5M |
| Jain Global LLC | $409.8K | 8,658 | 0.00% | new | NEW |
| Overbrook Management Corp | $393.0K | 8,304 | 0.06% | new | NEW |
| JONES FINANCIAL COMPANIES LLLP | $384.9K | 8,750 | 0.00% | 8q | +16.9%+$55.6K |
| State of New Jersey Common Pension Fund D | $375.8K | 7,939 | 0.00% | new | NEW |
| Almanack Investment Partners, LLC. | $371.4K | 7,846 | 0.05% | new | NEW |
| State of Tennessee, Department of Treasury | $370.2K | 7,821 | 0.00% | 18q | +54.1%+$129.9K |
| LPL Financial LLC | $369.4K | 7,805 | 0.00% | new | NEW |
| AXQ CAPITAL, LP | $357.2K | 7,546 | 0.04% | new | NEW |
| Caprock Group, LLC | $344.4K | 7,277 | 0.01% | 3q | -41.0%-$239.4K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-10 | 13G/A | Mike F. Chang INDIVIDUAL | 13.9% |
| 2026-08-07 | 13G | STATE STREET CORPORATIONwith 1 co-filers | 7.8% |
| 2026-07-14 | 13G/A | Dimensional Fund Advisors LP | 4.5% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 203 | $1.2B | 22,726,768 | 62 | 53 | 58 | 6.9% |
| Q1 2026 | 170 | $487.7M | 21,901,617 | 28 | 56 | 48 | 1.1% |
| Q4 2025 | 152 | $441.1M | 22,162,006 | 22 | 52 | 47 | 0.7% |
| Q3 2025 | 174 | $619.7M | 22,068,851 | 31 | 56 | 40 | 0.7% |
| Q2 2025 | 154 | $560.2M | 21,646,749 | 26 | 64 | 31 | 1.0% |
| Q1 2025 | 148 | $572.0M | 22,631,862 | 20 | 43 | 56 | 1.6% |
| Q4 2024 | 165 | $768.2M | 20,456,160 | 29 | 57 | 45 | 1.6% |
| Q3 2024 | 163 | $730.8M | 19,598,333 | 35 | 50 | 47 | 1.0% |
| Q2 2024 | 153 | $722.8M | 19,181,429 | 46 | 44 | 42 | 1.0% |
| Q1 2024 | 126 | $425.3M | 19,234,452 | 14 | 47 | 38 | 0.4% |
| Q4 2023 | 127 | $472.1M | 18,121,880 | 14 | 51 | 33 | 0.4% |
| Q3 2023 | 126 | $508.8M | 17,003,606 | 8 | 45 | 41 | 0.7% |
| Q2 2023 | 128 | $561.3M | 16,832,762 | 13 | 43 | 41 | 1.7% |
| Q1 2023 | 121 | $465.5M | 16,961,530 | 8 | 44 | 41 | 2.0% |
| Q4 2022 | 123 | $386.8M | 13,405,014 | 18 | 37 | 40 | 1.2% |
| Q3 2022 | 168 | $580.2M | 18,505,804 | 21 | 64 | 53 | 1.9% |
| Q2 2022 | 184 | $614.6M | 18,147,284 | 32 | 68 | 55 | 1.5% |
| Q1 2022 | 207 | $909.1M | 15,846,622 | 55 | 62 | 69 | 4.9% |
| Q4 2021 | 177 | $944.0M | 15,149,357 | 51 | 42 | 51 | 3.2% |
| Q3 2021 | 132 | $475.7M | 14,915,538 | 22 | 47 | 45 | 1.7% |
| Q2 2021 | 127 | $469.1M | 15,227,971 | 25 | 49 | 30 | 1.3% |
| Q1 2021 | 127 | $511.2M | 15,503,350 | 34 | 37 | 45 | 0.8% |
| Q4 2020 | 99 | $365.0M | 15,357,023 | 23 | 33 | 26 | 0.5% |
| Q3 2020 | 81 | $192.6M | 15,009,071 | 14 | 16 | 35 | 0.0% |
| Q2 2020 | 72 | $169.5M | 15,512,285 | 12 | 23 | 26 | 0.5% |
| Q1 2020 | 77 | $100.5M | 15,473,750 | 5 | 25 | 32 | 1.3% |
| Q4 2019 | 85 | $217.3M | 15,765,792 | 13 | 35 | 23 | 1.2% |
| Q3 2019 | 84 | $180.5M | 14,681,829 | 18 | 21 | 27 | 0.1% |
| Q2 2019 | 74 | $143.3M | 15,351,388 | 7 | 21 | 31 | 0.0% |
| Q1 2019 | 82 | $178.2M | 15,477,281 | 9 | 18 | 35 | 0.0% |
| Q4 2018 | 86 | $162.1M | 15,905,401 | 3 | 2 | 1 | 0.0% |