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 |
|---|---|---|---|---|---|---|
| Q3 2026 | 1 | 0 | 49.50K | $1.70M | n/a | n/a |
| Q2 2026 | 108 | +16 | 33.40M | $4.22B | +20 | −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 | n/a |
| Q4 2024 | 8 | -2 | 3.56M | $53.70M | n/a | −2 |
| Q3 2024 | 9 | 0 | 2.94M | $59.78M | +1 | −1 |
| Q2 2024 | 9 | n/a | 3.63M | $83.63M | n/a | n/a |
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 ↗ ×15 |
| 2 | Vanguard Capital Management Llc | 2.26M | n/a | $89.10M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | State Street Global Advisors ✦ (passive) | 2.01M | +2.5% | $78.94M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 4 | Wcm Investment Management, Llc | 1.86M | +16878.8% | $70.58M | 0.2% | ▲ Add | 2 | SEC ↗ ×2 |
| 5 | Geode Capital Management ✦ (passive) | 1.37M | +2.1% | $53.97M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 6 | Morgan Stanley ✦ | 1.19M | -14.3% | $46.93M | 0.0% | ▼ Trim | 3 | SEC ↗ ×7 |
| 7 | Janus Henderson Group Plc | 1.09M | +0.2% | $42.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | Invesco Ltd. | 787.10K | -41.4% | $30.97M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 9 | Qube Research & Technologies Ltd | 724.40K | +396.0% | $28.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 10 | Dimensional Fund Advisors Lp | 719.02K | +207.6% | $28.29M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 11 | Fidelity (FMR) ✦ | 629.24K | -21.7% | $24.76M | 0.0% | ▼ Trim | 4 | SEC ↗ ×3 |
| 12 | Citigroup Inc | 619.89K | +1316.8% | $24.39M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 13 | Northern Trust Corp | 562.53K | +3.4% | $22.14M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 14 | Goldman Sachs Group ✦ | 552.30K | +52.7% | $21.73M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 15 | Charles Schwab Investment… | 481.22K | +0.6% | $18.94M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 16 | Mitsubishi UFJ Trust & Banking Corp | 465.76K | -43.8% | $18.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 17 | UBS Group AG | 404.11K | -20.8% | $15.90M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 18 | Bank Of America Corp /De/ | 402.41K | +33.4% | $15.83M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 19 | First Trust Advisors Lp | 373.99K | +73.7% | $14.72M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | Principal Financial Group Inc | 340.72K | -11.1% | $13.41M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 21 | AQR Capital Management ✦ | 323.41K | -5.9% | $12.73M | 0.0% | ▼ Trim | 8 | SEC ↗ ×4 |
| 22 | Bank of New York Mellon Corp | 314.61K | -3.2% | $12.38M | 0.0% | ▼ Trim | 2 | SEC ↗ ×7 |
| 23 | Tidal Investments LLC | 313.81K | +73.4% | $12.35M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 24 | JPMorgan Chase ✦ | 297.57K | +49.8% | $11.29M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 25 | New York State Common Retirement… | 259.44K | -14.5% | $10.21M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 26 | T. Rowe Price ✦ | 216.96K | +358.2% | $8.54M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 27 | Ameriprise Financial Inc | 212.25K | -32.2% | $8.35M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 28 | Wells Fargo & Company/Mn | 204.05K | +144.2% | $8.03M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 29 | Citadel Advisors ✦ | 203.38K | +42.2% | $8.00M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 30 | Storebrand Asset Management As | 180.00K | New | $7.08M | 0.0% | New | 1 | SEC ↗ |
| 31 | Russell Investments Group, Ltd. | 160.93K | -2.0% | $6.33M | 0.0% | ▼ Trim | 2 | SEC ↗ ×8 |
| 32 | American Century Companies Inc | 150.55K | -0.9% | $5.92M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 33 | Rhumbline Advisers | 142.01K | +2.8% | $5.59M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | Hrt Financial Lp | 129.33K | +31.5% | $5.09M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Legal & General Group Plc | 126.30K | -5.8% | $4.97M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 36 | Renaissance Technologies ✦ | 122.60K | -1.5% | $4.82M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 37 | Dodge & Cox ✦ | 119.89K | +6.7% | $4.72M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 38 | Nuveen, LLC | 111.89K | +4.2% | $4.40M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 39 | Swiss National Bank | 106.60K | +1.5% | $4.19M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 40 | Franklin Resources Inc | 96.42K | New | $3.79M | 0.0% | New | 1 | SEC ↗ ×4 |
| 41 | UBS AM, a distinct business unit of… | 92.24K | +7.4% | $3.63M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 42 | Group One Trading Llc | 91.43K | -14.6% | $3.60M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 43 | Sei Investments Co | 85.00K | +45.4% | $3.34M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 44 | LPL Financial LLC | 83.04K | -24.9% | $3.27M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 45 | Deutsche Bank Ag\ | 79.86K | +8.6% | $3.14M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 46 | Mackenzie Financial Corp | 70.88K | +25.1% | $2.79M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | Millennium Management ✦ | 65.56K | +179.0% | $2.58M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 48 | California State Teachers… | 63.13K | +32.4% | $2.48M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 49 | Victory Capital Management Inc | 60.12K | -29.1% | $2.37M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 50 | Susquehanna International Group, Llp | 59.75K | +195.2% | $2.35M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 51 | Alliancebernstein L.P. | 58.04K | +1.8% | $2.29M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 52 | Healthcare Of Ontario Pension Plan… | 57.15K | New | $2.25M | 0.0% | New | 1 | SEC ↗ |
| 53 | Prudential Financial Inc | 54.10K | +9.8% | $2.13M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 54 | Quantinno Capital Management LP | 53.92K | -2.5% | $2.12M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 55 | Bnp Paribas Financial Markets | 53.54K | -52.8% | $2.11M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 56 | State Board Of Administration Of… | 52.54K | -17.9% | $2.07M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 57 | Two Sigma Investments ✦ | 52.42K | New | $2.06M | 0.0% | New | 1 | SEC ↗ |
| 58 | Barclays Plc | 49.19K | -54.0% | $1.94M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 59 | Balyasny Asset Management L.P. | 47.08K | New | $1.85M | 0.0% | New | 1 | SEC ↗ |
| 60 | Lazard Asset Management Llc | 43.03K | New | $1.69M | 0.0% | New | 1 | SEC ↗ |
| 61 | Focus Partners Wealth | 42.26K | -0.3% | $1.66M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 62 | State Of Wisconsin Investment Board | 34.70K | +185.4% | $1.37M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 63 | Cerity Partners LLC | 27.54K | -89.7% | $1.08M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 64 | Wealth Enhancement Advisory… | 59.17K | +222.3% | $1.04M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 65 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 25.92K | +3.2% | $1.02M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 66 | Neuberger Berman Group LLC | 25.32K | -6.5% | $982,868 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 67 | Manufacturers Life Insurance… | 24.79K | -0.7% | $975,290 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 68 | Simplex Trading, Llc | 24.46K | -78.0% | $962,658 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 69 | Zurcher Kantonalbank (Zurich… | 23.52K | +31.6% | $925,709 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | Raymond James Financial Inc | 22.20K | -44.8% | $873,571 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 71 | Mml Investors Services, Llc | 22.07K | -3.4% | $868,336 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 72 | Cwm, Llc | 20.57K | -0.2% | $809,272 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 73 | Voya Investment Management Llc | 16.95K | -16.2% | $667,061 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 74 | Nomura Asset Management… | 16.80K | -42.9% | $661,000 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 75 | Allspring Global Investments… | 14.81K | -39.3% | $599,415 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 76 | ProShare Advisors LLC | 13.68K | -11.9% | $538,110 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 77 | Creative Planning | 12.46K | +34.0% | $490,183 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 78 | Federated Hermes, Inc. | 12.07K | -36.6% | $475,033 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 79 | Fifth Third Bancorp | 11.41K | +11546.9% | $449,157 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 80 | Grantham, Mayo, Van Otterloo & Co.… | 10.18K | -49.8% | $400,622 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 81 | Pictet Asset Management Holding SA | 9.72K | 0.0% | $382,679 | 0.0% | Held | 2 | SEC ↗ |
| 82 | Cetera Investment Advisers | 8.80K | +22.6% | $346,123 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 83 | Osaic Holdings, Inc. | 7.28K | -49.2% | $286,539 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 84 | Mirae Asset Global Investments Co.… | 6.34K | -23.5% | $249,636 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 85 | Marshall Wace ✦ | 5.73K | New | $225,357 | 0.0% | New | 1 | SEC ↗ |
| 86 | Nomura Holdings Inc | 5.52K | -43.5% | $217,251 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 87 | Ensign Peak Advisors, Inc | 4.56K | 0.0% | $179,593 | 0.0% | Held | 2 | SEC ↗ |
| 88 | Royal Bank Of Canada | 4.12K | +26.0% | $162,000 | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 89 | Jones Financial Companies Lllp | 1.71K | +118.8% | $68,640 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 90 | Pnc Financial Services Group, Inc. | 1.36K | -1.2% | $53,595 | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 91 | BNP Paribas Asset Management… | 913 | -34.0% | $35,927 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 92 | Optiver Holding B.V. | 85 | New | $3,345 | 0.0% | New | 1 | SEC ↗ |
| 93 | Us Bancorp \De\ | 70 | New | $2,755 | 0.0% | New | 1 | SEC ↗ |
| 94 | Rockefeller Capital Management L.P. | 36 | New | $1,417 | 0.0% | New | 1 | SEC ↗ ×2 |
“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% |
| Franklin Resources Inc | $3.79M | 0.0% |
| Healthcare Of Ontario Pension… | $2.25M | 0.0% |
| Two Sigma Investments | $2.06M | 0.0% |
| Balyasny Asset Management L.P. | $1.85M | 0.0% |
| Lazard Asset Management Llc | $1.69M | 0.0% |
| Marshall Wace | $225,357 | 0.0% |
| Optiver Holding B.V. | $3,345 | 0.0% |
| Us Bancorp \De\ | $2,755 | 0.0% |
| Rockefeller Capital… | $1,417 | 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)
Sep 09
Wang David H
Officer, Director, 10% owner · 1.10K sh · $85,349
Sep 09
Wang David H
Officer, Director, 10% owner · 4.81K sh · $368,841
Sep 09
Wang David H
Officer, Director, 10% owner · 11.67K sh · $881,716
Sep 09
Wang David H
Officer, Director, 10% owner · 18.93K sh · $1.41M
Sep 09
Wang David H
Officer, Director, 10% owner · 33.49K sh · $2.47M
Sep 08
Wang David H
Officer, Director, 10% owner · 4.80K sh · $364,980
Sep 08
Wang David H
Officer, Director, 10% owner · 51.37K sh · $3.96M
Sep 08
Wang David H
Officer, Director, 10% owner · 12.32K sh · $962,180
Sep 08
Wang David H
Officer, Director, 10% owner · 1.50K sh · $117,855
Aug 20
McKechnie Mark
Officer · 30.36K sh · $2.35M
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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