Who owns Alpha and Omega Semiconductor (AOSL)
Which tracked institutional funds hold AOSL, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AOSL company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on AOSL is one-sided between 2026-Q1 and 2026-Q2: 82 added or opened and 18 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
AOSL’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in AOSL divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 201 tracked filers holding AOSL, 117 increased or opened the position and 98 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in AOSL between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 12
- JANE STREET GROUP, LLC$11M
- Apis Capital Advisors, LLC$10M
- CONGRESS ASSET MANAGEMENT CO$10M
- IMC-Chicago, LLC$5M
- HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND$1M
- New Age Alpha Advisors, LLC$1M
Full exits 12
- ACADIAN ASSET MANAGEMENT LLC$5M
- GAGNON SECURITIES LLC$4M
- PEREGRINE CAPITAL MANAGEMENT LLC$4M
- Uniplan Investment Counsel, Inc.$3M
- Point72 Asset Management, L.P.$3M
- Gagnon Advisors, LLC$3M
Largest adds
- BlackRock, Inc.$115M
- STATE STREET CORP$80M
- TWO SIGMA INVESTMENTS, LP$33M
- MANUFACTURERS LIFE INSURANCE COMPANY, THE$30M
- DIMENSIONAL FUND ADVISORS LP$29M
- VANGUARD CAPITAL MANAGEMENT LLC$27M
Largest trims
- JPMORGAN CHASE & CO$2M
- SEI INVESTMENTS CO$1M
- Engineers Gate Manager LP$817K
- UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$797K
- Numerai GP LLC$612K
- Quantbot Technologies LP$275K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 4,256,528 | $201M | 19.3% | 2026-Q2 |
| STATE STREET CORP added | 2,347,448 | $111M | 10.6% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 1,375,083 | $65M | 6.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,335,089 | $63M | 6.0% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC trimmed | 1,111,480 | $53M | 5.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,070,895 | $51M | 4.9% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 951,576 | $45M | 4.3% | 2026-Q2 |
| FMR LLC added | 791,715 | $37M | 3.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 658,902 | $31M | 3.0% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 636,893 | $30M | 2.9% | 2026-Q2 |
| WEBER CAPITAL MANAGEMENT LLC /ADV trimmed | 538,437 | $25M | 2.4% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 412,910 | $20M | 1.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 403,197 | $19M | 1.8% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 309,015 | $15M | 1.4% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 284,225 | $13M | 1.3% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 279,113 | $13M | 1.3% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 267,648 | $13M | 1.2% | 2026-Q2 |
| NORTHERN TRUST CORP added | 261,018 | $12M | 1.2% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 234,335 | $11M | 1.1% | 2026-Q2 |
| MORGAN STANLEY added | 217,176 | $10M | 1.0% | 2026-Q2 |
| Invesco Ltd. trimmed | 207,842 | $10M | 0.9% | 2026-Q2 |
| Apis Capital Advisors, LLC new | 206,280 | $10M | 0.9% | 2026-Q2 |
| CONGRESS ASSET MANAGEMENT CO new | 203,460 | $10M | 0.9% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 194,356 | $9M | 0.9% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 163,428 | $8M | 0.7% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 160,918 | $8M | 0.7% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC added | 149,537 | $7M | 0.7% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 145,243 | $7M | 0.7% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL added | 144,312 | $7M | 0.7% | 2026-Q2 |
| Bank of New York Mellon Corp added | 141,445 | $7M | 0.6% | 2026-Q2 |
| UBS Group AG trimmed | 135,116 | $6M | 0.6% | 2026-Q2 |
| Empowered Funds, LLC added | 129,537 | $6M | 0.6% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 120,056 | $6M | 0.5% | 2026-Q2 |
| Trexquant Investment LP trimmed | 117,474 | $6M | 0.5% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 109,566 | $5M | 0.5% | 2026-Q2 |
| IMC-Chicago, LLC new | 99,791 | $5M | 0.5% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 96,522 | $5M | 0.4% | 2026-Q2 |
| WEDGE CAPITAL MANAGEMENT L L P/NC trimmed | 91,440 | $4M | 0.4% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 85,371 | $4M | 0.4% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 83,433 | $4M | 0.4% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 76,044 | $4M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 61,676 | $3M | 0.3% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 61,255 | $3M | 0.3% | 2026-Q2 |
| CITIGROUP INC added | 61,099 | $3M | 0.3% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 55,849 | $3M | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 55,668 | $3M | 0.3% | 2026-Q2 |
| ALGERT GLOBAL LLC trimmed | 54,200 | $3M | 0.2% | 2026-Q2 |
| Legal & General Group Plc trimmed | 54,126 | $3M | 0.2% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 52,853 | $3M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 49,300 | $2M | 0.2% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 47,029 | $2M | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 40,523 | $2M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 39,368 | $2M | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 39,104 | $2M | 0.2% | 2026-Q2 |
| XTX Topco Ltd added | 37,562 | $2M | 0.2% | 2026-Q2 |
| Quantinno Capital Management LP trimmed | 36,440 | $2M | 0.2% | 2026-Q2 |
| WINTON GROUP Ltd trimmed | 34,889 | $2M | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 33,698 | $747K | 0.1% | 2026-Q2 |
| Numerai GP LLC trimmed | 32,941 | $2M | 0.1% | 2026-Q2 |
| Mork Capital Management, LLC trimmed | 30,000 | $1M | 0.1% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 29,005 | $1M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 27,820 | $1M | 0.1% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 26,638 | $1M | 0.1% | 2026-Q2 |
| New Age Alpha Advisors, LLC new | 24,986 | $1M | 0.1% | 2026-Q2 |
| Counterpoint Mutual Funds LLC trimmed | 24,712 | $1M | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 23,317 | $1M | 0.1% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd trimmed | 22,218 | $1M | 0.1% | 2026-Q2 |
| Marex Group Ltd new | 21,500 | $1M | 0.1% | 2026-Q2 |
| Dynamic Technology Lab Private Ltd added | 21,440 | $1M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 21,414 | $1M | 0.1% | 2026-Q2 |
| Creative Planning added | 21,107 | $999K | 0.1% | 2026-Q2 |
| NATIXIS | 20,000 | $947K | 0.1% | 2026-Q2 |
| Jump Financial, LLC trimmed | 19,800 | $937K | 0.1% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC added | 19,063 | $902K | 0.1% | 2026-Q2 |
| Walleye Trading LLC added | 18,979 | $898K | 0.1% | 2026-Q2 |
| Brevan Howard Capital Management LP trimmed | 16,483 | $780K | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd | 15,523 | $735K | 0.1% | 2026-Q2 |
| Illinois Municipal Retirement Fund added | 15,358 | $727K | 0.1% | 2026-Q2 |
| Arosa Capital Management LP trimmed | 15,000 | $710K | 0.1% | 2026-Q2 |
| Capelight Capital Asset Management LP new | 15,000 | $710K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 14,460 | $684K | 0.1% | 2026-Q2 |
| Jupiter Topco LLC new | 13,485 | $638K | 0.1% | 2026-Q2 |
| Zurcher Kantonalbank (Zurich Cantonalbank) added | 13,232 | $626K | 0.1% | 2026-Q2 |
| DIVERSIFIED TRUST CO new | 12,912 | $611K | 0.1% | 2026-Q2 |
| Engineers Gate Manager LP trimmed | 12,250 | $580K | 0.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 11,391 | $539K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 11,209 | $531K | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 10,096 | $478K | 0.0% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 8,964 | $424K | 0.0% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 8,750 | $385K | 0.0% | 2026-Q2 |
| Jain Global LLC trimmed | 8,658 | $410K | 0.0% | 2026-Q2 |
| Overbrook Management Corp | 8,304 | $393K | 0.0% | 2026-Q2 |
| State of New Jersey Common Pension Fund D new | 7,939 | $376K | 0.0% | 2026-Q2 |
| Almanack Investment Partners, LLC. new | 7,846 | $371K | 0.0% | 2026-Q2 |
| State of Tennessee, Department of Treasury added | 7,821 | $370K | 0.0% | 2026-Q2 |
| LPL Financial LLC trimmed | 7,805 | $369K | 0.0% | 2026-Q2 |
| AXQ CAPITAL, LP trimmed | 7,546 | $357K | 0.0% | 2026-Q2 |
| Caprock Group, LLC trimmed | 7,277 | $344K | 0.0% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM added | 7,266 | $344K | 0.0% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 6,881 | $323K | 0.0% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.