Latest Period
Q1 2026
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
296
Shares (Excl. Options)
44,336,306
Price
$39.35
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- Type / Class
- Equity / Common Stock
- Symbol
- ACMR on Nasdaq
- Shares outstanding
- 59,904,855
- Price per share
- $50.61
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 44,336,306
- Total reported value
- $1,742,930,525
- % of total 13F portfolios
- 0.01%
- Share change
- -707,216
- Value change
- -$28,818,505
- Number of holders
- 296
- Price from insider filings
- $50.61
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- ACMR - ACM Research, Inc. - Common Stock is tracked under CUSIP 00108J109.
- 296 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 275 to 296 between Q4 2025 and Q1 2026.
- Reported value moved from $1,785,391,912 to $1,742,930,525.
Research use
- 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.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 296 institutions filings for Q1 2026.
Security key
00108J109
Latest holder period
Q1 2026
13F holders
296
13D/G owners
2
CIK / CUSIP context first
Open Q1 2026 holders
ACMR full holder history
ACM Research, Inc. SEC filings
ACM Research, Inc. company facts
ACM Research, Inc. insider transactions
Broader feeds
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 Mar 2026, 296 institutional investors reported holding 44,336,306 shares of ACM Research, Inc. - Common Stock (ACMR). This represents 74% 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 52% 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% | 7,984,847 | +1.2% | 0.01% | $314,203,729 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.8% | 2,264,337 | 0% | 0% | $89,101,661 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.7% | 2,203,831 | 0% | 0% | $86,720,750 |
| STATE STREET CORP | 3.3% | 2,006,116 | +2.5% | 0% | $78,940,665 |
| WCM INVESTMENT MANAGEMENT, LLC | 3.1% | 1,860,874 | +16879% | 0.16% | $70,582,950 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3% | 1,371,227 | +2.1% | 0% | $53,967,892 |
| MORGAN STANLEY | 2% | 1,192,705 | -14% | 0% | $46,932,974 |
| JANUS HENDERSON GROUP PLC | 1.8% | 1,085,634 | +0.24% | 0.02% | $42,697,985 |
| Value Aligned Research Advisors, LLC | 1.6% | 955,927 | 0.45% | $37,615,727 | |
| Invesco Ltd. | 1.3% | 787,101 | -41% | 0% | $30,972,424 |
| SOUTHEASTERN ASSET MANAGEMENT INC/TN/ | 1.3% | 782,900 | -53% | 1.5% | $30,807,115 |
| Polunin Capital Partners Ltd | 1.3% | 763,318 | 8.3% | $31,807,000 | |
| Qube Research & Technologies Ltd | 1.2% | 724,405 | +396% | 0.04% | $28,505,337 |
| DIMENSIONAL FUND ADVISORS LP | 1.2% | 719,023 | +208% | 0.01% | $28,286,108 |
| Tekne Capital Management, LLC | 1.2% | 715,000 | 0% | 12% | $28,135,000 |
| Longaeva Partners L.P. | 1.2% | 708,379 | 1.3% | $27,874,714 | |
| FMR LLC | 1.1% | 629,244 | -22% | 0% | $24,760,751 |
| CITIGROUP INC | 1% | 619,892 | +1317% | 0.02% | $24,392,750 |
| WEXFORD CAPITAL LP | 1% | 599,246 | +79% | 3.9% | $23,580,330 |
| Cederberg Capital Ltd | 1% | 599,200 | -14% | 13% | $23,579,000 |
| Oxbow Capital Management (HK) Ltd | 1% | 596,689 | 6.3% | $23,479,712 | |
| NORTHERN TRUST CORP | 0.94% | 562,535 | +3.4% | 0% | $22,135,752 |
| GOLDMAN SACHS GROUP INC | 0.92% | 552,304 | +53% | 0% | $21,733,159 |
| LSV ASSET MANAGEMENT | 0.91% | 545,307 | -77% | 0.05% | $21,458,000 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.8% | 481,219 | +0.6% | 0% | $18,935,968 |
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 | 44,336,306 | $1,742,930,525 | -$28,818,505 | $39.35 | 296 |
| 2025 Q4 | 45,228,817 | $1,785,391,912 | +$131,298,731 | $39.45 | 275 |
| 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 |