| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13% | +86% | $200,125,707 | +$96,872,680 | 7,420,308 | +94% | BlackRock, Inc. | 30 Sep 2025 |
| Yiheng Capital Management, L.P. | 1.2% | $12,273,320 | 666,304 | Yiheng Capital Partners, L.P. | 30 Sep 2024 |
As of 30 Sep 2025, 254 institutional investors reported holding 41,773,578 shares of ACM Research, Inc. - Class A Stock (ACMR). This represents 71% of the company’s total 58,891,333 outstanding shares.
The largest institutional shareholders of ACM Research, Inc. - Class A Stock (ACMR) together control 55% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 13% | 7,587,539 | +85% | 0.01% | $296,900,401 |
| VANGUARD GROUP INC | 8.2% | 4,846,413 | +13% | 0% | $189,640,140 |
| LSV ASSET MANAGEMENT | 4.3% | 2,504,305 | +463% | 0.22% | $97,993,000 |
| Triata Capital Ltd | 3.4% | 2,003,225 | +26% | 9.1% | $78,386,194 |
| STATE STREET CORP | 3.4% | 1,990,254 | +59% | 0% | $77,878,639 |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | 2.5% | 1,485,687 | +25% | 3% | $58,134,932 |
| Mitsubishi UFJ Trust & Banking Corp | 2.3% | 1,359,969 | -41% | 0.12% | $53,215,587 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.2% | 1,323,502 | +6.9% | 0% | $51,795,325 |
| FEDERATED HERMES, INC. | 1.8% | 1,061,236 | -25% | 0.07% | $41,526,165 |
| Broad Bay Capital Management, LP | 1.7% | 1,012,414 | +3.4% | 4.9% | $39,615,760 |
| MORGAN STANLEY | 1.5% | 876,965 | +59% | 0% | $34,315,663 |
| GOLDMAN SACHS GROUP INC | 1.1% | 673,241 | -13% | 0% | $26,343,920 |
| UBS Group AG | 1% | 588,540 | +52% | 0% | $23,029,569 |
| NORTHERN TRUST CORP | 1% | 587,108 | +4.3% | 0% | $22,973,536 |
| Steamboat Capital Partners, LLC | 0.89% | 525,000 | -9.5% | 5.3% | $20,543,250 |
| Cederberg Capital Ltd | 0.84% | 496,500 | 5.5% | $19,428,000 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.74% | 437,158 | +6.5% | 0% | $17,105,993 |
| Raiffeisen Bank International AG | 0.74% | 435,000 | 0% | 0.22% | $16,808,400 |
| Portolan Capital Management, LLC | 0.69% | 405,860 | 0.86% | $15,881,302 | |
| CITADEL ADVISORS LLC | 0.67% | 394,969 | +94% | 0.01% | $15,455,137 |
| Bank of New York Mellon Corp | 0.62% | 366,214 | +63% | 0% | $14,329,949 |
| MY.Alpha Management HK Advisors Ltd | 0.61% | 360,237 | 9.1% | $14,096,074 | |
| AQR CAPITAL MANAGEMENT LLC | 0.61% | 356,741 | -14% | 0.01% | $13,959,276 |
| PRINCIPAL FINANCIAL GROUP INC | 0.57% | 336,993 | +396% | 0.01% | $13,186,536 |
| AMERIPRISE FINANCIAL INC | 0.54% | 316,504 | +59% | 0% | $12,416,394 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 805,897 | $32,478,460 | +$8,885,885 | $39.45 | 24 |
| 2025 Q3 | 41,773,578 | $1,634,561,381 | +$212,531,689 | $39.13 | 254 |
| 2025 Q2 | 37,392,985 | $968,631,228 | +$59,232,875 | $25.90 | 240 |
| 2025 Q1 | 35,841,980 | $837,275,171 | +$17,599,951 | $23.34 | 239 |
| 2024 Q4 | 35,662,282 | $538,489,758 | +$7,993,982 | $15.10 | 176 |
| 2024 Q3 | 31,950,482 | $648,963,618 | -$47,041,650 | $20.30 | 182 |
| 2024 Q2 | 33,510,772 | $772,775,024 | +$12,721,716 | $23.06 | 200 |
| 2024 Q1 | 32,500,748 | $946,919,916 | +$8,635,036 | $29.14 | 194 |
| 2023 Q4 | 1,424,423 | $27,833,226 | +$771,029 | $19.54 | 3 |
| 2023 Q3 | 30,912,630 | $559,691,690 | +$35,854,140 | $18.10 | 151 |
| 2023 Q2 | 29,260,781 | $382,644,984 | +$726,091 | $13.08 | 120 |
| 2023 Q1 | 29,370,362 | $343,632,559 | +$7,088,809 | $11.70 | 127 |
| 2022 Q4 | 30,403,698 | $234,410,112 | -$59,641,578 | $7.71 | 118 |
| 2022 Q3 | 26,863,514 | $334,745,847 | -$19,906,088 | $12.46 | 108 |
| 2022 Q2 | 36,002,473 | $605,639,547 | +$102,741,194 | $16.83 | 96 |
| 2022 Q1 | 29,310,358 | $606,427,568 | +$404,537,435 | $20.69 | 93 |
| 2021 Q4 | 8,766,241 | $747,431,922 | -$36,461,953 | $85.27 | 98 |
| 2021 Q3 | 7,480,381 | $822,577,210 | +$23,973,487 | $110.00 | 92 |
| 2021 Q2 | 7,289,503 | $745,150,236 | +$19,443,233 | $102.22 | 91 |
| 2021 Q1 | 7,258,990 | $586,483,372 | +$141,307,192 | $80.79 | 91 |
| 2020 Q4 | 5,429,914 | $441,174,638 | +$12,004,630 | $81.25 | 89 |
| 2020 Q3 | 5,157,107 | $356,478,620 | +$26,578,543 | $69.10 | 84 |
| 2020 Q2 | 4,963,957 | $309,512,846 | +$77,614,225 | $62.36 | 82 |
| 2020 Q1 | 3,358,004 | $99,428,366 | +$38,773,549 | $29.61 | 59 |
| 2019 Q4 | 2,963,810 | $54,685,221 | +$2,169,282 | $18.45 | 44 |
| 2019 Q3 | 2,923,158 | $40,506,857 | +$16,143,113 | $13.86 | 46 |
| 2019 Q2 | 1,711,333 | $26,707,673 | +$4,338,116 | $15.61 | 33 |
| 2019 Q1 | 1,421,359 | $21,923,512 | -$337,612 | $15.42 | 25 |
| 2018 Q4 | 1,547,445 | $16,827,000 | -$1,218,755 | $10.88 | 25 |
| 2018 Q3 | 1,679,868 | $18,591,328 | -$788,087 | $11.07 | 30 |
| 2018 Q2 | 1,754,379 | $18,912,000 | +$9,674,049 | $10.78 | 32 |
| 2018 Q1 | 849,051 | $10,442,000 | +$326,930 | $12.30 | 11 |
| 2017 Q4 | 873,313 | $4,569,000 | +$4,569,004 | $5.25 | 8 |