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 Q2 2026
Institutions Reporting
297
Shares (Excl. Options)
44,337,393
Price
$39.35
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- Security type / class
- Equity / Common Stock
- Symbol
- ACMR on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 44,337,393
- Total 13F value
- $1,742,973,300
- Portfolio coverage rank
- 0.01%
- Share change
- -706,355
- Value change
- -$28,784,623
- Number of holders
- 297
- Shares outstanding
- 59,904,855
- SEC-reported price per share
- $126.89
- Insider filing price
- $126.89
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- ACMR - ACM Research, Inc. - Common Stock is tracked under CUSIP 00108J109.
- 297 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 297 to 32 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $1,742,973,300 to $128,082,536.
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 297 institutions filings for Q1 2026.
Security key
00108J109
Latest holder period
Q1 2026
13F holders
297
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:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
ACMR
| 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, 297 institutional investors reported holding 44,337,393 shares of ACM Research, Inc. - Common Stock (ACMR). This represents 74% of the company’s total 59,904,855 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
52%
| 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 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
35
Latest
Q1 2026
Rows shown
1-25 of 35
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 1,154,798 | $128,082,536 | -$17,278,043 | $126.89 | 32 |
| 2026 Q1 | 44,337,393 | $1,742,973,300 | -$28,784,623 | $39.35 | 297 |
| 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 |