Latest Period
Q4 2025
Security Snapshot
ACM Research, Inc. - Common Stock (ACMR) Institutional Ownership
CUSIP: 00108J109
13F Institutional Holders and Ownership History from Q4 2017 to Q1 2026
Institutions Reporting
274
Shares (Excl. Options)
45,225,765
Price
$39.45
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- Type / Class
- Equity / Common Stock
- Symbol
- ACMR on Nasdaq
- Shares outstanding
- 59,904,855
- Price per share
- $39.35
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 45,225,765
- Total reported value
- $1,785,271,511
- % of total 13F portfolios
- 0.01%
- Share change
- +3,312,570
- Value change
- +$131,298,731
- Number of holders
- 274
- Price from insider filings
- $39.35
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- ACMR - ACM Research, Inc. - Common Stock is tracked under CUSIP 00108J109.
- 274 institutions reported positions in Q4 2025.
- 2 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 274 to 54 between Q4 2025 and Q1 2026.
- Reported value moved from $1,785,271,511 to $82,864,879.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 274 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 00108J109?
CUSIP 00108J109 identifies ACMR - ACM Research, Inc. - Common Stock in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 00108J109:
Significant Owners of ACM Research, Inc. - Common 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 31 Dec 2025, 274 institutional investors reported holding 45,225,765 shares of ACM Research, Inc. - Common Stock (ACMR). This represents 75% of the company’s total 59,904,855 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of ACM Research, Inc. - Common Stock (ACMR) together control 57% 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% | 7,888,480 | +4% | 0.01% | $311,200,536 |
| VANGUARD GROUP INC | 8.3% | 4,972,103 | +2.6% | 0% | $196,149,463 |
| LSV ASSET MANAGEMENT | 4% | 2,380,521 | -4.9% | 0.2% | $93,912,000 |
| STATE STREET CORP | 3.3% | 1,958,041 | -1.6% | 0% | $77,244,717 |
| Triata Capital Ltd | 3.2% | 1,929,919 | -3.7% | 9.2% | $76,135,305 |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | 2.8% | 1,680,181 | +13% | 3% | $66,283,140 |
| MORGAN STANLEY | 2.3% | 1,392,306 | +59% | 0% | $54,926,494 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.2% | 1,342,899 | +1.5% | 0% | $52,986,097 |
| Invesco Ltd. | 2.2% | 1,342,136 | +444% | 0.01% | $52,947,265 |
| JANUS HENDERSON GROUP PLC | 1.8% | 1,082,982 | +1406% | 0.02% | $42,739,885 |
| Mitsubishi UFJ Trust & Banking Corp | 1.4% | 829,127 | -39% | 0.08% | $32,721,497 |
| FMR LLC | 1.3% | 803,666 | +224% | 0% | $31,704,614 |
| Tekne Capital Management, LLC | 1.2% | 715,000 | 10% | $28,206,750 | |
| Cederberg Capital Ltd | 1.2% | 693,900 | +40% | 8.9% | $27,374,000 |
| Broad Bay Capital Management, LP | 1.1% | 652,214 | -36% | 2.9% | $25,729,842 |
| NORTHERN TRUST CORP | 0.91% | 544,059 | -7.3% | 0% | $21,463,127 |
| UBS Group AG | 0.85% | 510,315 | -13% | 0% | $20,131,927 |
| Steamboat Capital Partners, LLC | 0.84% | 504,161 | -4% | 5.5% | $19,889,151 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.8% | 478,333 | +9.4% | 0% | $18,870,237 |
| Penn Capital Management Company, LLC | 0.73% | 435,843 | 1.4% | $17,212,421 | |
| Raiffeisen Bank International AG | 0.73% | 435,000 | 0% | 0.23% | $17,487,000 |
| PRINCIPAL FINANCIAL GROUP INC | 0.64% | 383,129 | +14% | 0.01% | $15,114,440 |
| GOLDMAN SACHS GROUP INC | 0.6% | 361,588 | -46% | 0% | $14,264,647 |
| Nearwater Capital Markets, Ltd | 0.59% | 350,800 | 0.24% | $13,839,060 | |
| AQR CAPITAL MANAGEMENT LLC | 0.57% | 343,603 | -3.7% | 0.01% | $13,555,139 |
Institutional Holders of ACM Research, Inc. - Common Stock (ACMR) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 2,073,543 | $82,864,879 | +$24,102,249 | $39.35 | 54 |
| 2025 Q4 | 45,225,765 | $1,785,271,511 | +$131,298,731 | $39.45 | 274 |
| 2025 Q3 | 41,761,016 | $1,634,068,343 | +$211,342,861 | $39.13 | 255 |
| 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 |