Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in AOSL held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.3M | $201.5M | +9.0% | 14.222% | 0.00% |
| 2 | STATE STREET CORP | 2.3M | $111.1M | +67.5% | 7.843% | 0.00% |
| 3 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 1.4M | $65.1M | -12.7% | 4.594% | 0.03% |
| 4 | DIMENSIONAL FUND ADVISORS LP | 1.3M | $63.2M | -14.6% | 4.461% | 0.01% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.1M | $52.6M | -4.9% | 3.714% | 0.00% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 1.1M | $50.7M | +1.9% | 3.578% | 0.00% |
| 7 | JANE STREET GROUP, LLC | 980K | $46.4M | +4107.0% | 3.275% | 0.00% |
| 8 | TWO SIGMA INVESTMENTS, LP | 952K | $45.0M | +72.1% | 3.179% | 0.03% |
| 9 | FMR LLC | 792K | $37.5M | +45.4% | 2.645% | 0.00% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 659K | $31.2M | +4.8% | 2.201% | 0.00% |
| 11 | Connor, Clark & Lunn Investment Management Ltd. | 637K | $30.1M | +89.1% | 2.128% | 0.06% |
| 12 | WEBER CAPITAL MANAGEMENT LLC /ADV | 538K | $25.5M | -0.7% | 1.799% | 21.69% |
| 13 | CITADEL ADVISORS LLC | 476K | $22.5M | +421.0% | 1.592% | 0.00% |
| 14 | WELLINGTON MANAGEMENT GROUP LLP | 413K | $19.5M | -40.6% | 1.380% | 0.00% |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 403K | $19.1M | -4.1% | 1.347% | 0.00% |
| 16 | MILLENNIUM MANAGEMENT LLC | 318K | $15.0M | +60.6% | 1.061% | 0.01% |
| 17 | ROYCE & ASSOCIATES LP | 309K | $14.6M | -40.4% | 1.033% | 0.12% |
| 18 | D. E. Shaw & Co., Inc. | 284K | $13.5M | +1.7% | 0.950% | 0.01% |
| 19 | GOLDMAN SACHS GROUP INC | 279K | $13.2M | +4.3% | 0.933% | 0.00% |
| 20 | NORTHERN TRUST CORP | 261K | $12.4M | +5.8% | 0.872% | 0.00% |
| 21 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 254K | $12.0M | +95.9% | 0.847% | 0.00% |
| 22 | MORGAN STANLEY | 217K | $10.3M | +10.3% | 0.726% | 0.00% |
| 23 | Invesco Ltd. | 208K | $9.8M | -44.7% | 0.694% | 0.00% |
| 24 | APIS CAPITAL ADVISORS, LLC | 206K | $9.8M | — | 0.689% | 0.95% |
| 25 | CONGRESS ASSET MANAGEMENT CO | 203K | $9.6M | — | 0.680% | 0.06% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in AOSL — a direct measure of their conviction.
Filings activity in AOSL during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new AOSL position in Q2 2026
Institutions that fully closed their AOSL position in Q2 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 214 | +20% | 81.24% | +6.78 pp | $1.12B | +132% |
| Q1 2026 | 178 | +6.0% | 74.46% | 1.75 pp | $484M | +10% |
| Q4 2025 | 168 | 8.7% | 76.21% | +2.07 pp | $439M | 28% |
| Q3 2025 | 184 | +14% | 74.14% | +2.59 pp | $613M | +13% |
| Q2 2025 | 161 | +4.5% | 71.55% | 4.83 pp | $545M | 3.3% |
| Q1 2025 | 154 | 12% | 76.38% | +5.81 pp | $563M | 25% |
| Q4 2024 | 175 | +2.3% | 70.57% | +2.78 pp | $755M | +4.6% |
| Q3 2024 | 171 | — | 67.79% | — | $721M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying AOSL stock.
Based on Q2 2026 13F filings, institutional ownership of Alpha and Omega Semiconductor Limited stands at 81.2%, held across 214 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of AOSL, with approximately 4,256,528 shares worth $0.20B as of Q2 2026.
Yes — 5 widely-followed marquee investors appear among the top 25 institutional holders of AOSL, including JANE STREET GROUP, LLC, TWO SIGMA INVESTMENTS, LP, CITADEL ADVISORS LLC, MILLENNIUM MANAGEMENT LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for AOSL is 87 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
60 institutions opened new positions in AOSL during Q2 2026, while 24 fully exited. 132 added to existing positions and 17 trimmed.
AOSL institutional ownership rose by 6.78 percentage points quarter-over-quarter, with a net change of +36 holders.
The top 10 institutions account for 62.8% of all reported 13F value in AOSL, and the top 25 account for 83.9%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Alpha and Omega Semiconductor Limited (AOSL) Institutional Ownership