Security record · archived quarter
ACMR
ACM Research, Inc. · Technology · Semiconductors
92Tracked holders
-2Δ holders
30.05MShares held
$1.19BReported value
+1New positions
−2Exits
Momentum inputs (comparable managers):
holder breadth -2.1% ·
share flow +1.0% ·
net new positions -1.1%
· formula
Concentrated accumulation: rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2025
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 · Q4 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 7.89M | +4.0% | $311.20M | 0.0% | ▲ Add | 3 | SEC ↗ ×13 |
| 2 | The Vanguard Group ✦ (passive) | 4.97M | +2.6% | $196.15M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 3 | State Street Global Advisors ✦ (passive) | 1.96M | -1.6% | $77.24M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 4 | Morgan Stanley ✦ | 1.39M | +58.8% | $54.93M | 0.0% | ▲ Add | 2 | SEC ↗ ×6 |
| 5 | Geode Capital Management ✦ (passive) | 1.34M | +1.5% | $52.99M | 0.0% | ▲ Add | 7 | SEC ↗ ×2 |
| 6 | Invesco Ltd. | 1.34M | n/a | $52.95M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 7 | Janus Henderson Group Plc | 1.08M | n/a | $42.74M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | Mitsubishi UFJ Trust & Banking Corp | 829.13K | n/a | $32.72M | 0.1% | n/c | 1 | SEC ↗ |
| 9 | Fidelity (FMR) ✦ | 803.67K | +223.8% | $31.70M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 10 | Northern Trust Corp | 544.06K | n/a | $21.46M | 0.0% | n/c | 1 | SEC ↗ ×6 |
| 11 | UBS Group AG | 510.31K | n/a | $20.13M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 12 | Charles Schwab Investment… | 478.33K | n/a | $18.87M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | Principal Financial Group Inc | 383.13K | n/a | $15.11M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 14 | Goldman Sachs Group ✦ | 361.59K | -46.3% | $14.26M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 15 | AQR Capital Management ✦ | 343.60K | -3.7% | $13.56M | 0.0% | ▼ Trim | 7 | SEC ↗ ×4 |
| 16 | Bank of New York Mellon Corp | 324.94K | n/a | $12.82M | 0.0% | n/c | 1 | SEC ↗ ×7 |
| 17 | Ameriprise Financial Inc | 313.17K | n/a | $12.36M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 18 | New York State Common Retirement… | 303.54K | n/a | $11.97M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | Bank Of America Corp /De/ | 301.71K | n/a | $11.90M | 0.0% | n/c | 1 | SEC ↗ ×6 |
| 20 | Cerity Partners LLC | 268.34K | n/a | $10.59M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 21 | Dimensional Fund Advisors Lp | 233.74K | n/a | $9.22M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 22 | First Trust Advisors Lp | 215.32K | n/a | $8.49M | 0.0% | n/c | 1 | SEC ↗ |
| 23 | JPMorgan Chase ✦ | 198.69K | +246.3% | $7.84M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 24 | Tidal Investments LLC | 180.98K | n/a | $7.14M | 0.0% | n/c | 1 | SEC ↗ |
| 25 | Russell Investments Group, Ltd. | 164.31K | n/a | $6.48M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 26 | American Century Companies Inc | 151.99K | n/a | $6.00M | 0.0% | n/c | 1 | SEC ↗ |
| 27 | Qube Research & Technologies Ltd | 146.06K | n/a | $5.76M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Citadel Advisors ✦ | 143.02K | -63.8% | $5.64M | 0.0% | ▼ Trim | 7 | SEC ↗ ×2 |
| 29 | Rhumbline Advisers | 138.15K | n/a | $5.45M | 0.0% | n/c | 1 | SEC ↗ |
| 30 | Legal & General Group Plc | 134.02K | n/a | $5.29M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 31 | Renaissance Technologies ✦ | 124.44K | -58.5% | $4.91M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 32 | Bnp Paribas Financial Markets | 113.53K | n/a | $4.48M | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Dodge & Cox ✦ | 112.39K | -8.5% | $4.43M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 34 | Simplex Trading, Llc | 110.95K | n/a | $4.38M | 0.1% | n/c | 1 | SEC ↗ |
| 35 | LPL Financial LLC | 110.62K | n/a | $4.36M | 0.0% | n/c | 1 | SEC ↗ |
| 36 | Nuveen, LLC | 107.36K | n/a | $4.24M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 37 | Group One Trading Llc | 107.11K | n/a | $4.23M | 0.1% | n/c | 1 | SEC ↗ |
| 38 | Barclays Plc | 106.90K | n/a | $4.22M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 39 | Swiss National Bank | 105.00K | n/a | $4.14M | 0.0% | n/c | 1 | SEC ↗ |
| 40 | Hrt Financial Lp | 98.34K | n/a | $3.88M | 0.0% | n/c | 1 | SEC ↗ |
| 41 | Walleye Trading LLC | 87.16K | n/a | $3.44M | 0.1% | n/c | 1 | SEC ↗ |
| 42 | UBS AM, a distinct business unit of… | 85.92K | n/a | $3.39M | 0.0% | n/c | 1 | SEC ↗ ×5 |
| 43 | Victory Capital Management Inc | 84.77K | n/a | $3.34M | 0.0% | n/c | 1 | SEC ↗ |
| 44 | Wells Fargo & Company/Mn | 83.56K | n/a | $3.30M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 45 | Deutsche Bank Ag\ | 73.50K | n/a | $2.90M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 46 | State Board Of Administration Of… | 64.03K | n/a | $2.53M | 0.0% | n/c | 1 | SEC ↗ |
| 47 | Sei Investments Co | 58.45K | n/a | $2.31M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 48 | Mackenzie Financial Corp | 56.68K | n/a | $2.27M | 0.0% | n/c | 1 | SEC ↗ |
| 49 | Alliancebernstein L.P. | 57.02K | n/a | $2.25M | 0.0% | n/c | 1 | SEC ↗ |
| 50 | Quantinno Capital Management LP | 55.31K | n/a | $2.18M | 0.0% | n/c | 1 | SEC ↗ |
| 51 | Prudential Financial Inc | 49.28K | n/a | $1.94M | 0.0% | n/c | 1 | SEC ↗ |
| 52 | California State Teachers… | 47.67K | n/a | $1.88M | 0.0% | n/c | 1 | SEC ↗ |
| 53 | T. Rowe Price ✦ | 47.35K | +4.4% | $1.87M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 54 | Citigroup Inc | 43.75K | n/a | $1.73M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 55 | Focus Partners Wealth | 42.40K | n/a | $1.67M | 0.0% | n/c | 1 | SEC ↗ |
| 56 | Raymond James Financial Inc | 40.23K | n/a | $1.59M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 57 | D. E. Shaw & Co. ✦ | 30.84K | -72.8% | $1.22M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 58 | Nomura Asset Management… | 29.40K | n/a | $1.16M | 0.0% | n/c | 1 | SEC ↗ |
| 59 | Norges Bank ✦ (passive) | 28.53K | New | $1.13M | 0.0% | New | 1 | SEC ↗ |
| 60 | Allspring Global Investments… | 24.39K | n/a | $1.09M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 61 | Neuberger Berman Group LLC | 27.08K | n/a | $1.08M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 62 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 25.12K | n/a | $990,905 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 63 | Manufacturers Life Insurance… | 24.96K | n/a | $984,514 | 0.0% | n/c | 1 | SEC ↗ |
| 64 | Millennium Management ✦ | 23.50K | -88.8% | $927,075 | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 65 | Wealth Enhancement Advisory… | 18.36K | n/a | $924,792 | 0.0% | n/c | 1 | SEC ↗ |
| 66 | Mml Investors Services, Llc | 22.85K | n/a | $901,472 | 0.0% | n/c | 1 | SEC ↗ |
| 67 | Parallax Volatility Advisers, L.P. | 20.94K | n/a | $825,965 | 0.0% | n/c | 1 | SEC ↗ |
| 68 | Cwm, Llc | 20.60K | n/a | $813,000 | 0.0% | n/c | 1 | SEC ↗ |
| 69 | Grantham, Mayo, Van Otterloo & Co.… | 20.29K | n/a | $800,322 | 0.0% | n/c | 1 | SEC ↗ |
| 70 | Susquehanna International Group, Llp | 20.24K | n/a | $798,586 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 71 | Voya Investment Management Llc | 20.22K | n/a | $797,797 | 0.0% | n/c | 1 | SEC ↗ |
| 72 | Federated Hermes, Inc. | 19.05K | n/a | $751,562 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 73 | Zurcher Kantonalbank (Zurich… | 17.88K | n/a | $705,287 | 0.0% | n/c | 1 | SEC ↗ |
| 74 | ProShare Advisors LLC | 15.52K | n/a | $612,422 | 0.0% | n/c | 1 | SEC ↗ |
| 75 | Osaic Holdings, Inc. | 14.34K | n/a | $565,784 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 76 | State Of Wisconsin Investment Board | 12.16K | n/a | $479,594 | 0.0% | n/c | 1 | SEC ↗ |
| 77 | Wcm Investment Management, Llc | 10.96K | n/a | $440,592 | 0.0% | n/c | 1 | SEC ↗ |
| 78 | Amundi | 9.83K | n/a | $387,912 | 0.0% | n/c | 1 | SEC ↗ |
| 79 | Nomura Holdings Inc | 9.77K | n/a | $385,308 | 0.0% | n/c | 1 | SEC ↗ |
| 80 | Pictet Asset Management Holding SA | 9.72K | n/a | $383,651 | 0.0% | n/c | 1 | SEC ↗ |
| 81 | Creative Planning | 9.30K | n/a | $366,846 | 0.0% | n/c | 1 | SEC ↗ |
| 82 | Aberdeen Group plc | 8.39K | n/a | $330,828 | 0.0% | n/c | 1 | SEC ↗ |
| 83 | Mirae Asset Global Investments Co.… | 8.29K | n/a | $326,962 | 0.0% | n/c | 1 | SEC ↗ |
| 84 | Cetera Investment Advisers | 7.17K | n/a | $283,054 | 0.0% | n/c | 1 | SEC ↗ |
| 85 | Man Group plc | 5.31K | n/a | $209,361 | 0.0% | n/c | 1 | SEC ↗ |
| 86 | Ensign Peak Advisors, Inc | 4.56K | n/a | $180,050 | 0.0% | n/c | 1 | SEC ↗ |
| 87 | Royal Bank Of Canada | 3.27K | n/a | $128,000 | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 88 | BNP Paribas Asset Management… | 1.38K | n/a | $55,000 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 89 | Pnc Financial Services Group, Inc. | 1.38K | n/a | $54,401 | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 90 | Jones Financial Companies Lllp | 783 | n/a | $30,889 | 0.0% | n/c | 1 | SEC ↗ |
| 91 | National Bank Of Canada /Fi/ | 189 | n/a | $7,457 | 0.0% | n/c | 1 | SEC ↗ |
| 92 | Fifth Third Bancorp | 98 | n/a | $3,866 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Norges Bank | $1.13M | 0.0% |
Exited
| Two Sigma Investments | $7.60M | was 0.0% |
| Marshall Wace | $4.44M | 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: Q4 2025 ·
Methodology ·
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