ACM Research, Inc. (ACMR)
Nasdaq: ACMR · Special Industry Machinery, NEC · Fremont, CA · filing with the SEC since 2016
Grade5.4
◀ Past 5.2● Present 5.8▶ Future 5.2
Who owns ACM Research, Inc.
As filed with the SECHolders of 5% or more
2
Blackrock, Inc. holds 12.6% of Class A Stock, as its SCHEDULE 13G/A filed Oct 2, 2025 says.
Directors and officers
10
report now, of 16 people on the record since 2017. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Blackrock, Inc.
SCHEDULE 13G/A · filed Oct 2, 2025 · Class A Stock · 6.6% in Apr 17, 2025
Vanguard Portfolio Management
SCHEDULE 13G · filed Jul 31, 2026 · Common Stock
Yiheng Capital Partners, L.P.
SCHEDULE 13G/A · filed Nov 13, 2024 · Ordinary shares, par value $0.01 per share · reported falling below 5%
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%, from 8.3% in Jan 30, 2026
What ACMR reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
ACM Research (Shanghai), Inc.
An entity · consolidated entity · owns, named in the 10-K filed Mar 2, 2026
Mainland China Subsidiaries
An entity · consolidated entity · owns, named in the 10-K filed Mar 2, 2026
Semiconductor Manufacturing International Corporation
An investee · investee · invested in, named in the 10-K filed Mar 2, 2026
14 subsidiaries in 6 countries, from the list filed with the 10-K filed Mar 2, 2026.
Insider tradesForm 4
72sales
0purchases
72sales on a scheduled plan
8people selling
$51.2Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 6, 2025 to Nov 6, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 6, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window8 of 18 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Wang David H | Chief Executive Officer, President and Director | 29 | $29.0M | 29 | 0 | $0 |
| Mckechnie Mark | Chief Financial Officer and Treasurer | 12 | $9.8M | 12 | 0 | $0 |
| Chen Fuping | Vice President, Sales-China of ACM Research (Shanghai), Inc., a subsidiary of the Issuer | 3 | $4.0M | 3 | 0 | $0 |
| Liu Tracy | director | 4 | $2.9M | 4 | 0 | $0 |
| Feng Lisa | Chief Financial Officer of ACM Research (Shanghai), Inc., a subsidiary of the Issuer | 6 | $2.4M | 6 | 0 | $0 |
| Cheav Sotheara | Senior Vice President, Manufacturing of ACM Research (Shanghai), Inc., a subsidiary of the Issuer. | 7 | $1.6M | 7 | 0 | $0 |
| Dun Haiping | director | 9 | $1.0M | 9 | 0 | $0 |
| Pappis Charles C | director | 2 | $500,000 | 2 | 0 | $0 |