Security record
ACMR
ACM Research, Inc. · Technology · Semiconductors
108Tracked holders
+16Δ holders
33.40MShares held
$4.22BReported value
+20New positions
−3Exits
Momentum inputs (comparable managers):
holder breadth +17.4% ·
share flow +14.1% ·
net new positions +15.7%
— 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 | 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 | — |
| 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 ↗ ×15 |
| 2 | Vanguard Capital Management Llc | 2.46M | +8.8% | $312.50M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 3 | Capital World Investors ✦ | 2.40M | New | $304.29M | 0.0% | New | 1 | SEC ↗ |
| 4 | State Street Global Advisors ✦ (passive) | 2.19M | +9.1% | $277.67M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 5 | Geode Capital Management ✦ (passive) | 1.49M | +8.5% | $188.82M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 6 | Invesco Ltd. | 1.17M | +48.7% | $148.47M | 0.0% | ▲ Add | 3 | SEC ↗ ×6 |
| 7 | Dimensional Fund Advisors Lp | 954.47K | +32.8% | $121.07M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 8 | Wcm Investment Management, Llc | 917.65K | -50.7% | $109.09M | 0.2% | ▼ Trim | 3 | SEC ↗ ×2 |
| 9 | Morgan Stanley ✦ | 700.18K | -41.3% | $88.85M | 0.0% | ▼ Trim | 4 | SEC ↗ ×8 |
| 10 | Fidelity (FMR) ✦ | 672.18K | +6.8% | $85.29M | 0.0% | ▲ Add | 5 | SEC ↗ ×3 |
| 11 | Citadel Advisors ✦ | 636.84K | +213.1% | $80.81M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 12 | Capital International Investors | 623.43K | New | $79.11M | 0.0% | New | 1 | SEC ↗ |
| 13 | T. Rowe Price ✦ | 591.57K | +172.7% | $75.07M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 14 | Northern Trust Corp | 569.13K | +1.2% | $72.22M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 15 | Charles Schwab Investment… | 526.76K | +9.5% | $66.84M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | Bank Of America Corp /De/ | 479.71K | +19.2% | $60.87M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 17 | Tidal Investments LLC | 470.94K | +50.1% | $59.76M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 18 | Goldman Sachs Group ✦ | 426.24K | -22.8% | $54.09M | 0.0% | ▼ Trim | 4 | SEC ↗ ×4 |
| 19 | UBS Group AG | 402.47K | -0.4% | $51.07M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 20 | Principal Financial Group Inc | 370.91K | +8.9% | $47.07M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 21 | Mitsubishi UFJ Trust & Banking Corp | 351.20K | -24.6% | $44.56M | 0.1% | ▼ Trim | 3 | SEC ↗ ×2 |
| 22 | Bank of New York Mellon Corp | 326.28K | +3.7% | $41.40M | 0.0% | ▲ Add | 3 | SEC ↗ ×7 |
| 23 | AQR Capital Management ✦ | 314.17K | -2.9% | $39.87M | 0.0% | ▼ Trim | 9 | SEC ↗ ×4 |
| 24 | First Trust Advisors Lp | 306.03K | -18.2% | $38.83M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 25 | Qube Research & Technologies Ltd | 280.01K | -61.4% | $35.53M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 26 | Mackenzie Financial Corp | 268.00K | +278.1% | $34.01M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 27 | Susquehanna International Group, Llp | 253.67K | +324.6% | $32.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 28 | Renaissance Technologies ✦ | 229.80K | +87.4% | $29.16M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 29 | Russell Investments Group, Ltd. | 221.78K | +37.8% | $28.14M | 0.0% | ▲ Add | 3 | SEC ↗ ×8 |
| 30 | Two Sigma Investments ✦ | 212.54K | +305.5% | $26.97M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 31 | Citigroup Inc | 209.84K | -66.2% | $26.63M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 32 | JPMorgan Chase ✦ | 214.85K | -27.8% | $25.83M | 0.0% | ▼ Trim | 4 | SEC ↗ ×6 |
| 33 | New York State Common Retirement… | 191.53K | -26.2% | $24.30M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 34 | Wellington Management ✦ | 174.99K | New | $22.20M | 0.0% | New | 1 | SEC ↗ ×3 |
| 35 | Nomura Asset Management… | 169.32K | +907.9% | $21.48M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 36 | Group One Trading Llc | 157.06K | +71.8% | $19.93M | 0.6% | ▲ Add | 3 | SEC ↗ |
| 37 | Nuveen, LLC | 148.49K | +32.7% | $18.84M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 38 | UBS AM, a distinct business unit of… | 146.41K | +58.7% | $18.58M | 0.0% | ▲ Add | 3 | SEC ↗ ×8 |
| 39 | Franklin Resources Inc | 145.38K | +50.8% | $18.45M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 40 | Millennium Management ✦ | 140.50K | +114.3% | $17.83M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 41 | Rhumbline Advisers | 128.98K | -9.2% | $16.37M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 42 | Legal & General Group Plc | 125.62K | -0.5% | $15.93M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 43 | Dodge & Cox ✦ | 116.39K | -2.9% | $14.77M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 44 | Ameriprise Financial Inc | 115.18K | -45.7% | $14.61M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 45 | Swiss National Bank | 103.60K | -2.8% | $13.15M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 46 | American Century Companies Inc | 101.20K | -32.8% | $12.84M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 47 | LPL Financial LLC | 93.29K | +12.3% | $11.84M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 48 | Deutsche Bank Ag\ | 90.50K | +13.3% | $11.48M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 49 | Bnp Paribas Financial Markets | 86.34K | +61.3% | $10.96M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 50 | Storebrand Asset Management As | 80.51K | -55.3% | $10.22M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 51 | Healthcare Of Ontario Pension Plan… | 74.78K | +30.9% | $9.49M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 52 | Lazard Asset Management Llc | 63.78K | +48.2% | $8.09M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 53 | Wells Fargo & Company/Mn | 58.63K | -71.3% | $7.44M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 54 | Prudential Financial Inc | 58.51K | +8.1% | $7.42M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 55 | Quantinno Capital Management LP | 54.22K | +0.5% | $6.88M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 56 | Simplex Trading, Llc | 44.32K | +81.2% | $5.62M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 57 | Focus Partners Wealth | 43.90K | +3.9% | $5.57M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 58 | Neuberger Berman Group LLC | 44.24K | +74.8% | $5.42M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 59 | Barclays Plc | 40.32K | -18.0% | $5.12M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 60 | Sei Investments Co | 40.31K | -52.6% | $5.12M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 61 | State Board Of Administration Of… | 36.05K | -31.4% | $4.58M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 62 | D. E. Shaw & Co. ✦ | 33.50K | New | $4.25M | 0.0% | New | 1 | SEC ↗ ×2 |
| 63 | Voya Investment Management Llc | 30.81K | +81.7% | $3.91M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 64 | Soros Fund Management ✦ | 30.12K | New | $3.82M | 0.1% | New | 1 | SEC ↗ |
| 65 | Osaic Holdings, Inc. | 29.24K | +301.6% | $3.71M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 66 | Manufacturers Life Insurance… | 28.63K | +15.5% | $3.63M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 67 | Norges Bank ✦ (passive) | 28.53K | New | $3.62M | 0.0% | New | 1 | SEC ↗ |
| 68 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 27.23K | +5.1% | $3.46M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 69 | Mml Investors Services, Llc | 24.74K | +12.1% | $3.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 70 | Fifth Third Bancorp | 23.06K | +102.1% | $2.93M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 71 | Alliancebernstein L.P. | 74.34K | +28.1% | $2.93M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 72 | State Of Wisconsin Investment Board | 22.19K | -36.0% | $2.82M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 73 | Wealth Enhancement Advisory… | 51.90K | -12.3% | $2.46M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 74 | Credit Agricole S A | 19.00K | New | $2.41M | 0.0% | New | 1 | SEC ↗ |
| 75 | Raymond James Financial Inc | 18.51K | -16.6% | $2.35M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 76 | Creative Planning | 17.92K | +43.9% | $2.27M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 77 | Victory Capital Management Inc | 16.67K | -72.3% | $2.11M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 78 | Allspring Global Investments… | 15.35K | +3.6% | $1.80M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 79 | Zurcher Kantonalbank (Zurich… | 12.71K | -46.0% | $1.61M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 80 | Royal Bank Of Canada | 11.60K | +181.8% | $1.47M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 81 | Cetera Investment Advisers | 10.01K | +13.8% | $1.27M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 82 | Pictet Asset Management Holding SA | 7.86K | -19.2% | $997,102 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 83 | ProShare Advisors LLC | 7.73K | -43.5% | $980,986 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 84 | Cerity Partners LLC | 7.58K | -72.5% | $961,319 | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 85 | Mirae Asset Global Investments Co.… | 6.57K | +3.5% | $833,160 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 86 | Envestnet Asset Management Inc | 5.93K | New | $752,965 | 0.0% | New | 1 | SEC ↗ |
| 87 | Marshall Wace ✦ | 5.64K | -1.6% | $715,278 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 88 | Mercer Global Advisors Inc /Adv | 5.35K | New | $678,735 | 0.0% | New | 1 | SEC ↗ |
| 89 | Captrust Financial Advisors | 5.03K | New | $638,096 | 0.0% | New | 1 | SEC ↗ |
| 90 | Federated Hermes, Inc. | 5.00K | -58.6% | $634,450 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 91 | Commonwealth Equity Services, Llc | 4.71K | New | $597,780 | 0.0% | New | 1 | SEC ↗ |
| 92 | Bank Of Montreal /Can/ | 4.52K | New | $573,415 | 0.0% | New | 1 | SEC ↗ ×4 |
| 93 | Walleye Trading LLC | 4.40K | New | $558,697 | 0.0% | New | 1 | SEC ↗ |
| 94 | Grantham, Mayo, Van Otterloo & Co.… | 3.71K | -63.5% | $471,143 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 95 | LMR Partners LLP | 3.42K | New | $433,329 | 0.0% | New | 1 | SEC ↗ |
| 96 | Universal- Beteiligungs- und… | 3.37K | New | $427,999 | 0.0% | New | 1 | SEC ↗ |
| 97 | Ensign Peak Advisors, Inc | 3.21K | -29.6% | $407,824 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 98 | CIBC Bancorp USA Inc. | 3.04K | New | $385,618 | 0.0% | New | 1 | SEC ↗ ×3 |
| 99 | Gotham Asset Management ✦ | 3.02K | New | $382,827 | 0.0% | New | 1 | SEC ↗ |
| 100 | Truist Financial Corp | 2.59K | New | $329,153 | 0.0% | New | 1 | 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% |
| Wellington Management | $22.20M | 0.0% |
| D. E. Shaw & Co. | $4.25M | 0.0% |
| Soros Fund Management | $3.82M | 0.1% |
| Norges Bank | $3.62M | 0.0% |
| Credit Agricole S A | $2.41M | 0.0% |
| Envestnet Asset Management Inc | $752,965 | 0.0% |
| Mercer Global Advisors Inc… | $678,735 | 0.0% |
| Captrust Financial Advisors | $638,096 | 0.0% |
| Commonwealth Equity Services… | $597,780 | 0.0% |
| Bank Of Montreal /Can/ | $573,415 | 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)
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: Q2 2026 ·
Methodology ·
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