Security record · archived quarter
ACMR
ACM Research, Inc. · Technology · Semiconductors
94Tracked holders
+3Δ holders
30.41MShares held
$1.19BReported value
+10New positions
−8Exits
Momentum inputs (comparable managers):
holder breadth +3.3% ·
share flow +11.3% ·
net new positions +2.1%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 110 | +18 | 33.41M | $4.22B | +22 | −3 |
| Q1 2026 | 94 | +3 | 30.41M | $1.19B | +10 | −8 |
| Q4 2025 | 92 | -2 | 30.05M | $1.19B | +1 | −2 |
| Q3 2025 | 17 | 0 | 19.46M | $761.29M | +2 | −3 |
| Q2 2025 | 15 | +1 | 12.95M | $335.52M | +2 | −1 |
| Q1 2025 | 11 | +3 | 4.40M | $102.74M | +3 | — |
| Q4 2024 | 8 | -2 | 3.56M | $53.70M | — | −2 |
| Q3 2024 | 9 | 0 | 2.94M | $59.78M | +1 | −1 |
| Q2 2024 | 9 | — | 3.63M | $83.63M | — | — |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 7.98M | +1.2% | $314.20M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 16 | Vanguard Capital Management Llc | 2.26M | — | $89.10M | 0.0% | n/c | 1 | SEC ↗ |
| 17 | State Street Global Advisors ✦ (passive) | 2.01M | +2.5% | $78.94M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 18 | Wcm Investment Management, Llc | 1.86M | +16878.8% | $70.58M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 19 | Wcm Investment Management, Llc | 1.86M | +16878.8% | $70.58M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 20 | Geode Capital Management ✦ (passive) | 1.37M | +2.1% | $53.97M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 21 | Geode Capital Management ✦ (passive) | 1.37M | +2.1% | $53.97M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 22 | Morgan Stanley ✦ | 1.19M | -14.3% | $46.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 23 | Morgan Stanley ✦ | 1.19M | -14.3% | $46.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 24 | Morgan Stanley ✦ | 1.19M | -14.3% | $46.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 25 | Morgan Stanley ✦ | 1.19M | -14.3% | $46.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 26 | Morgan Stanley ✦ | 1.19M | -14.3% | $46.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 27 | Morgan Stanley ✦ | 1.19M | -14.3% | $46.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 28 | Morgan Stanley ✦ | 1.19M | -14.3% | $46.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 29 | Janus Henderson Group Plc | 1.09M | +0.2% | $42.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 30 | Invesco Ltd. | 787.10K | -41.4% | $30.97M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 31 | Invesco Ltd. | 787.10K | -41.4% | $30.97M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 32 | Invesco Ltd. | 787.10K | -41.4% | $30.97M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 33 | Invesco Ltd. | 787.10K | -41.4% | $30.97M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 34 | Invesco Ltd. | 787.10K | -41.4% | $30.97M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 35 | Qube Research & Technologies Ltd | 724.40K | +396.0% | $28.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 36 | Dimensional Fund Advisors Lp | 719.02K | +207.6% | $28.29M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 37 | Dimensional Fund Advisors Lp | 719.02K | +207.6% | $28.29M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 38 | Dimensional Fund Advisors Lp | 719.02K | +207.6% | $28.29M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 39 | Dimensional Fund Advisors Lp | 719.02K | +207.6% | $28.29M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 40 | Fidelity (FMR) ✦ | 629.24K | -21.7% | $24.76M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 41 | Fidelity (FMR) ✦ | 629.24K | -21.7% | $24.76M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 42 | Fidelity (FMR) ✦ | 629.24K | -21.7% | $24.76M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 43 | Citigroup Inc | 619.89K | +1316.8% | $24.39M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 44 | Citigroup Inc | 619.89K | +1316.8% | $24.39M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 45 | Northern Trust Corp | 562.53K | +3.4% | $22.14M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 46 | Northern Trust Corp | 562.53K | +3.4% | $22.14M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | Northern Trust Corp | 562.53K | +3.4% | $22.14M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 48 | Northern Trust Corp | 562.53K | +3.4% | $22.14M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 49 | Northern Trust Corp | 562.53K | +3.4% | $22.14M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 50 | Goldman Sachs Group ✦ | 552.30K | +52.7% | $21.73M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 51 | Goldman Sachs Group ✦ | 552.30K | +52.7% | $21.73M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 52 | Goldman Sachs Group ✦ | 552.30K | +52.7% | $21.73M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 53 | Charles Schwab Investment… | 481.22K | +0.6% | $18.94M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 54 | Mitsubishi UFJ Trust & Banking Corp | 465.76K | -43.8% | $18.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 55 | UBS Group AG | 404.11K | -20.8% | $15.90M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 56 | UBS Group AG | 404.11K | -20.8% | $15.90M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 57 | UBS Group AG | 404.11K | -20.8% | $15.90M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 58 | UBS Group AG | 404.11K | -20.8% | $15.90M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 59 | Bank Of America Corp /De/ | 402.41K | +33.4% | $15.83M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 60 | Bank Of America Corp /De/ | 402.41K | +33.4% | $15.83M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 61 | Bank Of America Corp /De/ | 402.41K | +33.4% | $15.83M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 62 | First Trust Advisors Lp | 373.99K | +73.7% | $14.72M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 63 | Principal Financial Group Inc | 340.72K | -11.1% | $13.41M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 64 | Principal Financial Group Inc | 340.72K | -11.1% | $13.41M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 65 | AQR Capital Management ✦ | 323.41K | -5.9% | $12.73M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 66 | AQR Capital Management ✦ | 323.41K | -5.9% | $12.73M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 67 | AQR Capital Management ✦ | 323.41K | -5.9% | $12.73M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 68 | AQR Capital Management ✦ | 323.41K | -5.9% | $12.73M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 69 | Bank of New York Mellon Corp | 314.61K | -3.2% | $12.38M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 70 | Bank of New York Mellon Corp | 314.61K | -3.2% | $12.38M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 71 | Bank of New York Mellon Corp | 314.61K | -3.2% | $12.38M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 72 | Bank of New York Mellon Corp | 314.61K | -3.2% | $12.38M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 73 | Bank of New York Mellon Corp | 314.61K | -3.2% | $12.38M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 74 | Bank of New York Mellon Corp | 314.61K | -3.2% | $12.38M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 75 | Bank of New York Mellon Corp | 314.61K | -3.2% | $12.38M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 76 | Tidal Investments LLC | 313.81K | +73.4% | $12.35M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 77 | JPMorgan Chase ✦ | 297.57K | +49.8% | $11.29M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 78 | JPMorgan Chase ✦ | 297.57K | +49.8% | $11.29M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 79 | JPMorgan Chase ✦ | 297.57K | +49.8% | $11.29M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 80 | JPMorgan Chase ✦ | 297.57K | +49.8% | $11.29M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 81 | JPMorgan Chase ✦ | 297.57K | +49.8% | $11.29M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 82 | New York State Common Retirement… | 259.44K | -14.5% | $10.21M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 83 | T. Rowe Price ✦ | 216.96K | +358.2% | $8.54M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 84 | T. Rowe Price ✦ | 216.96K | +358.2% | $8.54M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 85 | Ameriprise Financial Inc | 212.25K | -32.2% | $8.35M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 86 | Ameriprise Financial Inc | 212.25K | -32.2% | $8.35M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 87 | Wells Fargo & Company/Mn | 204.05K | +144.2% | $8.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 88 | Wells Fargo & Company/Mn | 204.05K | +144.2% | $8.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 89 | Wells Fargo & Company/Mn | 204.05K | +144.2% | $8.03M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 90 | Citadel Advisors ✦ | 203.38K | +42.2% | $8.00M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 91 | Citadel Advisors ✦ | 203.38K | +42.2% | $8.00M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 92 | Storebrand Asset Management As | 180.00K | New | $7.08M | 0.0% | New | 1 | SEC ↗ |
| 93 | Russell Investments Group, Ltd. | 160.93K | -2.0% | $6.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 94 | Russell Investments Group, Ltd. | 160.93K | -2.0% | $6.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 95 | Russell Investments Group, Ltd. | 160.93K | -2.0% | $6.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 96 | Russell Investments Group, Ltd. | 160.93K | -2.0% | $6.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 97 | Russell Investments Group, Ltd. | 160.93K | -2.0% | $6.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 98 | Russell Investments Group, Ltd. | 160.93K | -2.0% | $6.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 99 | Russell Investments Group, Ltd. | 160.93K | -2.0% | $6.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 100 | Russell Investments Group, Ltd. | 160.93K | -2.0% | $6.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Storebrand Asset Management As | $7.08M | 0.0% |
Exited
| Walleye Trading LLC | $3.44M | was 0.1% |
| D. E. Shaw & Co. | $1.22M | was 0.0% |
| Norges Bank | $1.13M | was 0.0% |
| Parallax Volatility Advisers… | $825,965 | was 0.0% |
| Amundi | $387,912 | was 0.0% |
| Aberdeen Group plc | $330,828 | was 0.0% |
| Man Group plc | $209,361 | was 0.0% |
| National Bank Of Canada /Fi/ | $7,457 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 298 holders, 44.10M shares, $1.62B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 20
McKechnie Mark
Officer · 13.62K sh · $1.04M
Aug 20
McKechnie Mark
Officer · 30.36K sh · $2.35M
Aug 20
McKechnie Mark
Officer · 11.21K sh · $873,069
Aug 18
Dun Haiping
Director · 1.20K sh · $96,348
Aug 18
Dun Haiping
Director · 3.40K sh · $276,454
Aug 18
Dun Haiping
Director · 400 sh · $32,868
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Jul 31
SC 13G — VANGUARD PORTFOLIO MANAGEMENT LLC
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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