Security key
00108J109
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 3,174,527
- Total 13F value
- $381,342,293
- Share change
- -850,317
- Put/Call ratio
- 54%
- SEC-reported price per share
- $126.89
- Number of holders
- 101
- Value change
- -$86,468,173
- Number of buys
- 58
- Number of sells
- 39
- 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 2026
Institutions
101
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
BlackRock, Inc.
Disclosed value leader
VANGUARD PORTFOLIO MANAGE...
Comparable rows
15/15
Latest evidence
30 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 13%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 13%.
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 BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
13%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.3%
Yiheng Capital Management, L.P.
1.2%
Jian Wang
0.39%
Tracy Liu
0.17%
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 |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
13%
from 13D/G
|
$314,203,729
7,984,847 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.3%
|
$332,918,191
3,405,116 shares
|
$0 | 30 Jun 2026 |
| Yiheng Capital Management, L.P. |
13D/G
Yiheng Capital Partners, L.P.
|
1.2%
|
$14,145,634
666,304 shares
|
$0 | 30 Sep 2024 |
| Jian Wang |
3/4/5
Chief Executive Officer and President of ACM Research (Shanghai), Inc., a subsidiary of the Issuer
|
0.39%
|
$8,860,530
253,158 shares
|
-$2,910,000 | 18 Sep 2025 |
| Tracy Liu |
3/4/5
Director
|
0.17%
|
$5,344,749
110,772 shares
|
-$3,345,782 | 10 Mar 2026 |
| Lisa Feng |
3/4/5
Chief Financial Officer of ACM Research (Shanghai), Inc., a subsidiary of the Issuer
|
0.08%
|
$2,329,046
50,001 shares
|
-$2,439,241 | 05 Mar 2026 |
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 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
101
Shares
3,174,527
Rows available
101
| 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 2026 vs Q1 2026 Across Filers
Q1 2026 holders
297
Q2 2026 holders
101
Holder diff
-196
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|