ACM Research, Inc.
ACMR- Exchange
- Nasdaq
- Industry
- Special Industry Machinery, NEC
- SEC CIK
- 0001680062
In the last 90 days, ACM Research, Inc. insiders filed 0 open-market purchases and 3 sales; 377 institutions reported holding it in 13F filings for Q2 2026, worth $6.11B in total; 3 superinvestors hold it, including Southeastern Asset Management (Longleaf) and Soros Fund Management.
Holders of 5% or more of ACMR
Holders whose latest Schedule 13D or 13G filing reports 5% or more of ACM Research, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 6.60%3.83M shares | – | Apr 17, 20251 filing | Apr 17, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
2 Schedule 13D and 13G filings on ACM Research, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Apr 17, 20259:35 AM ET | BlackRock, Inc. | 13G/A | 6.60%3.83M shares | – | Mar 31, 2025 | SEC |
| Nov 13, 202412:15 PM ET | Yiheng Capital Management, L.P.and 3 others | 13G/A | 1.20%666.3K shares | –Below 5% | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell ACM Research, Inc. shares.
No Form 144 notices for ACM Research, Inc. are on file.