Security record
ACMR
ACM Research, Inc. · Technology · Semiconductors
110Tracked holders
+18Δ holders
33.41MShares held
$4.22BReported value
+22New positions
−3Exits
Momentum inputs (comparable managers):
holder breadth +19.6% ·
share flow +14.1% ·
net new positions +17.3%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 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 · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 8.66M | +8.5% | $1.10B | 0.0% | ▲ Add | 5 | SEC ↗ |
| 16 | Vanguard Capital Management Llc | 2.46M | +8.8% | $312.50M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | Capital World Investors ✦ | 2.40M | New | $304.29M | 0.0% | New | 1 | SEC ↗ |
| 18 | State Street Global Advisors ✦ (passive) | 2.19M | +9.1% | $277.67M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 19 | Geode Capital Management ✦ (passive) | 1.49M | +8.5% | $188.82M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 20 | Geode Capital Management ✦ (passive) | 1.49M | +8.5% | $188.82M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 21 | Invesco Ltd. | 1.17M | +48.7% | $148.47M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 22 | Invesco Ltd. | 1.17M | +48.7% | $148.47M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 23 | Invesco Ltd. | 1.17M | +48.7% | $148.47M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 24 | Invesco Ltd. | 1.17M | +48.7% | $148.47M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 25 | Invesco Ltd. | 1.17M | +48.7% | $148.47M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 26 | Invesco Ltd. | 1.17M | +48.7% | $148.47M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 27 | Dimensional Fund Advisors Lp | 954.47K | +32.8% | $121.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 28 | Dimensional Fund Advisors Lp | 954.47K | +32.8% | $121.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 29 | Dimensional Fund Advisors Lp | 954.47K | +32.8% | $121.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 30 | Dimensional Fund Advisors Lp | 954.47K | +32.8% | $121.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 31 | Dimensional Fund Advisors Lp | 954.47K | +32.8% | $121.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 32 | Wcm Investment Management, Llc | 917.65K | -50.7% | $109.09M | 0.2% | ▼ Trim | 3 | SEC ↗ |
| 33 | Wcm Investment Management, Llc | 917.65K | -50.7% | $109.09M | 0.2% | ▼ Trim | 3 | SEC ↗ |
| 34 | Morgan Stanley ✦ | 700.18K | -41.3% | $88.85M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 35 | Morgan Stanley ✦ | 700.18K | -41.3% | $88.85M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 36 | Morgan Stanley ✦ | 700.18K | -41.3% | $88.85M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 37 | Morgan Stanley ✦ | 700.18K | -41.3% | $88.85M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 38 | Morgan Stanley ✦ | 700.18K | -41.3% | $88.85M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 39 | Morgan Stanley ✦ | 700.18K | -41.3% | $88.85M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 40 | Morgan Stanley ✦ | 700.18K | -41.3% | $88.85M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 41 | Morgan Stanley ✦ | 700.18K | -41.3% | $88.85M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 42 | Fidelity (FMR) ✦ | 672.18K | +6.8% | $85.29M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 43 | Fidelity (FMR) ✦ | 672.18K | +6.8% | $85.29M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 44 | Fidelity (FMR) ✦ | 672.18K | +6.8% | $85.29M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 45 | Citadel Advisors ✦ | 636.84K | +213.1% | $80.81M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 46 | Citadel Advisors ✦ | 636.84K | +213.1% | $80.81M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 47 | Capital International Investors | 623.43K | New | $79.11M | 0.0% | New | 1 | SEC ↗ |
| 48 | T. Rowe Price ✦ | 591.57K | +172.7% | $75.07M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 49 | T. Rowe Price ✦ | 591.57K | +172.7% | $75.07M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 50 | Northern Trust Corp | 569.13K | +1.2% | $72.22M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 51 | Northern Trust Corp | 569.13K | +1.2% | $72.22M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 52 | Northern Trust Corp | 569.13K | +1.2% | $72.22M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 53 | Northern Trust Corp | 569.13K | +1.2% | $72.22M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 54 | Northern Trust Corp | 569.13K | +1.2% | $72.22M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 55 | Charles Schwab Investment… | 526.76K | +9.5% | $66.84M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 56 | Bank Of America Corp /De/ | 479.71K | +19.2% | $60.87M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 57 | Bank Of America Corp /De/ | 479.71K | +19.2% | $60.87M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 58 | Bank Of America Corp /De/ | 479.71K | +19.2% | $60.87M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 59 | Bank Of America Corp /De/ | 479.71K | +19.2% | $60.87M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 60 | Bank Of America Corp /De/ | 479.71K | +19.2% | $60.87M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 61 | Tidal Investments LLC | 470.94K | +50.1% | $59.76M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 62 | Goldman Sachs Group ✦ | 426.24K | -22.8% | $54.09M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 63 | Goldman Sachs Group ✦ | 426.24K | -22.8% | $54.09M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 64 | Goldman Sachs Group ✦ | 426.24K | -22.8% | $54.09M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 65 | Goldman Sachs Group ✦ | 426.24K | -22.8% | $54.09M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 66 | UBS Group AG | 402.47K | -0.4% | $51.07M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 67 | UBS Group AG | 402.47K | -0.4% | $51.07M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 68 | UBS Group AG | 402.47K | -0.4% | $51.07M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 69 | Principal Financial Group Inc | 370.91K | +8.9% | $47.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 70 | Principal Financial Group Inc | 370.91K | +8.9% | $47.07M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 71 | Mitsubishi UFJ Trust & Banking Corp | 351.20K | -24.6% | $44.56M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 72 | Mitsubishi UFJ Trust & Banking Corp | 351.20K | -24.6% | $44.56M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 73 | Bank of New York Mellon Corp | 326.28K | +3.7% | $41.40M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 74 | Bank of New York Mellon Corp | 326.28K | +3.7% | $41.40M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 75 | Bank of New York Mellon Corp | 326.28K | +3.7% | $41.40M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 76 | Bank of New York Mellon Corp | 326.28K | +3.7% | $41.40M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 77 | Bank of New York Mellon Corp | 326.28K | +3.7% | $41.40M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 78 | Bank of New York Mellon Corp | 326.28K | +3.7% | $41.40M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 79 | Bank of New York Mellon Corp | 326.28K | +3.7% | $41.40M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 80 | AQR Capital Management ✦ | 314.17K | -2.9% | $39.87M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 81 | AQR Capital Management ✦ | 314.17K | -2.9% | $39.87M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 82 | AQR Capital Management ✦ | 314.17K | -2.9% | $39.87M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 83 | AQR Capital Management ✦ | 314.17K | -2.9% | $39.87M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 84 | First Trust Advisors Lp | 306.03K | -18.2% | $38.83M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 85 | Qube Research & Technologies Ltd | 280.01K | -61.4% | $35.53M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 86 | Mackenzie Financial Corp | 268.00K | +278.1% | $34.01M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 87 | Susquehanna International Group, Llp | 253.67K | +324.6% | $32.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 88 | Renaissance Technologies ✦ | 229.80K | +87.4% | $29.16M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 89 | Russell Investments Group, Ltd. | 221.78K | +37.8% | $28.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 90 | Russell Investments Group, Ltd. | 221.78K | +37.8% | $28.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 91 | Russell Investments Group, Ltd. | 221.78K | +37.8% | $28.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 92 | Russell Investments Group, Ltd. | 221.78K | +37.8% | $28.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 93 | Russell Investments Group, Ltd. | 221.78K | +37.8% | $28.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 94 | Russell Investments Group, Ltd. | 221.78K | +37.8% | $28.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 95 | Russell Investments Group, Ltd. | 221.78K | +37.8% | $28.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 96 | Russell Investments Group, Ltd. | 221.78K | +37.8% | $28.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 97 | Two Sigma Investments ✦ | 212.54K | +305.5% | $26.97M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 98 | Citigroup Inc | 209.84K | -66.2% | $26.63M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 99 | Citigroup Inc | 209.84K | -66.2% | $26.63M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 100 | JPMorgan Chase ✦ | 214.85K | -27.8% | $25.83M | 0.0% | ▼ Trim | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Capital World Investors | $304.29M | 0.0% |
| Capital International… | $79.11M | 0.0% |
Exited
| Hrt Financial Lp | $5.09M | was 0.0% |
| Balyasny Asset Management L.P. | $1.85M | was 0.0% |
| Nomura Holdings Inc | $217,251 | 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: Q2 2026 ·
Methodology ·
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