Security key
00108J109
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 37,392,485
- Total 13F value
- $968,631,098
- Share change
- +1,984,786
- Put/Call ratio
- 125%
- SEC-reported price per share
- $25.90
- Number of holders
- 239
- Value change
- +$59,232,869
- Number of buys
- 139
- Number of sells
- 119
- Shares outstanding
- 64,126,478
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2025
Institutions
239
Top holders
10
ACMR full security history
Ownership snapshot
Full 13F holder table
ACM Research, Inc. SEC filings
ACM Research, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of ACMR - ACM Research, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Yiheng Capital Management...
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
31 Mar 2025
13D/G
13F
Lead comparable stake: 1.2%
13D/G row: Yiheng Capital Management, L.P.
Showing 1-6 of 15 holder rows.
Quick read
Yiheng Capital Management, L.P. leads the comparable SEC ownership view at 1.2%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Yiheng Capital Management, L.P.'s linked filing trail.
Comparable ownership
Top 5
Yiheng Capital Management, L.P.
1.2%
BlackRock, Inc.
6.6%
VANGUARD GROUP INC
6.3%
Mitsubishi UFJ Trust & Banking Corp
2.6%
Triata Capital Ltd
2.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Yiheng Capital Management, L.P. |
13D/G
13F
Yiheng Capital Partners, L.P. · Company
|
1.2%
|
$14,145,634
666,304 shares
|
$0 | 30 Sep 2024 |
| BlackRock, Inc. |
13F
Company
|
6.6%
|
$98,318,723
4,212,456 shares
|
— | 31 Mar 2025 |
| VANGUARD GROUP INC |
13F
Company
|
6.3%
|
$94,651,776
4,055,346 shares
|
— | 31 Mar 2025 |
| Mitsubishi UFJ Trust & Banking Corp |
13F
Company
|
2.6%
|
$38,586,505
1,653,235 shares
|
— | 31 Mar 2025 |
| Triata Capital Ltd |
13F
Company
|
2.1%
|
$32,002,058
1,371,125 shares
|
— | 31 Mar 2025 |
| Invesco Ltd. |
13F
Company
|
2.1%
|
$31,254,641
1,339,102 shares
|
— | 31 Mar 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
239
Shares
37,392,485
Rows available
239
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2025 vs Q1 2025 Across Filers
Q1 2025 holders
239
Q2 2025 holders
239
Holder diff
0
| Investor | Q1 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|