ACM Research, Inc. - Class A Stock (ACMR) Institutional Ownership

13F Institutional Holders and Ownership History from Q4 2017 to Q4 2025

Type / Class
Equity / Class A Stock
Symbol
ACMR on Nasdaq
Shares outstanding
58,891,333
Price per share
$39.45
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
41,773,578
Total reported value
$1,634,561,381
% of total 13F portfolios
0.01%
Share change
+4,280,198
Value change
+$212,531,702
Number of holders
254
Price from insider filings
$39.45
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of ACM Research, Inc. - Class A Stock (ACMR) based on Schedule 13D/G filings

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% $14,145,634 666,304 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.

Top 25 Institutional Shareholders

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

Institutional Holders of ACM Research, Inc. - Class A Stock (ACMR) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 805,897 $32,478,460 +$8,532,733 $39.45 24
2025 Q3 41,773,578 $1,634,561,381 +$212,531,702 $39.13 254
2025 Q2 37,392,485 $968,631,098 +$59,232,869 $25.90 239
2025 Q1 35,841,980 $837,275,246 +$17,599,939 $23.34 239
2024 Q4 35,668,005 $538,575,863 +$1,582,438 $15.10 177
2024 Q3 32,339,282 $656,856,262 -$37,712,927 $20.30 181
2024 Q2 33,508,121 $772,714,047 +$5,942,475 $23.06 195
2024 Q1 32,763,159 $954,762,451 +$25,181,100 $29.14 194
2023 Q4 32,892,829 $642,774,193 +$39,830,721 $19.54 154
2023 Q3 31,082,900 $562,774,649 +$38,989,842 $18.10 153
2023 Q2 29,261,051 $382,648,185 +$726,292 $13.08 121
2023 Q1 29,370,632 $343,635,569 +$920,863 $11.70 128
2022 Q4 30,422,642 $234,556,379 -$60,173,329 $7.71 120
2022 Q3 34,915,788 $435,076,889 -$23,398,496 $12.46 113
2022 Q2 36,066,144 $606,711,091 +$101,866,278 $16.83 98
2022 Q1 29,321,200 $606,652,154 +$405,127,320 $20.69 95
2021 Q4 8,766,331 $747,439,596 -$36,495,630 $85.27 99
2021 Q3 8,908,016 $979,616,110 +$172,129,886 $110.00 94
2021 Q2 7,370,254 $753,404,436 +$22,572,688 $102.22 93
2021 Q1 7,259,073 $586,489,643 +$146,266,911 $80.79 92
2020 Q4 5,443,661 $442,291,701 +$12,069,420 $81.25 91
2020 Q3 5,159,767 $356,662,075 +$26,674,819 $69.10 87
2020 Q2 4,964,007 $309,515,964 +$77,613,417 $62.36 83
2020 Q1 3,818,506 $113,063,847 +$39,231,858 $29.61 61
2019 Q4 2,963,810 $54,685,221 +$2,169,281 $18.45 44
2019 Q3 2,923,158 $40,506,857 +$8,790,813 $13.86 46
2019 Q2 1,745,428 $27,238,673 +$4,238,707 $15.61 36
2019 Q1 1,464,505 $22,588,512 -$391,231 $15.42 28
2018 Q4 1,558,409 $16,945,000 -$1,305,490 $10.87 27
2018 Q3 1,679,926 $18,592,328 -$790,077 $11.07 31
2018 Q2 1,754,578 $18,915,000 +$9,677,053 $10.78 34
2018 Q1 849,051 $10,442,000 +$324,928 $12.30 11
2017 Q4 873,847 $4,571,000 +$4,571,000 $5.25 10