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.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $15.3M in total
- 3
- 13F holdersQ2 2026, +81 vs. previous quarter
- 377
- 13F valueReported value at the end of Q2 2026
- $6.11B
- Superinvestors holdingAt the end of Q2 2026
- 3
Price chart
Superinvestors holding ACMR, Q2 2026
3 superinvestors report holding ACM Research, Inc. on Form 13F. Percentages are the stock's share of each portfolio.
Southeastern Asset Management (Longleaf)
Mason Hawkins
0.9%
ACM Research, Inc.'s share of the portfolio
- Shares
- 139,478
- Value
- $17.7M
Soros Fund Management
George Soros
0.1%
ACM Research, Inc.'s share of the portfolio
- Shares
- 30,122
- Value
- $3.82M
| Superinvestor | Weight | Value |
|---|---|---|
| Maverick Capital | <0.1% | $674.4K |
Latest insider trades
Open-market purchases and sales by ACM Research, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 10, 2026 (view filing)4:30 PM ET | Sep 8-9 | 2 days | Wang David HSee Remarks | SSaleClass A Common Stock | −140.0K | $75.93 | −$10.6M | −14.9%802.7K after | 9 lots10b5-1 |
| Aug 21, 2026 (view filing)9:30 PM ET | Aug 20 | 1 day | McKechnie MarkSee Remarks | SSaleClass A Common Stock | −55.2K | $77.27 | −$4.26M | −98.4%900 after | 3 lots10b5-1 |
| Aug 20, 2026 (view filing)4:30 PM ET | Aug 18 | 2 days | Dun HaipingDirector | SSaleClass A Common Stock | −5.00K | $81.13 | −$405.7K | −100.0%0 after | 3 lots10b5-1 |
| Jun 5, 2026 (view filing) | Jun 4-5 | 1 day | Cheav SothearaSee remarks | SSaleClass A Common Stock | −18.8K | $84.58 | −$1.59M | −15.8%100.0K after | 7 lots10b5-1 |
| Jun 5, 2026 (view filing) | Jun 3-4 | 2 days | Wang David HSee Remarks | SSaleClass A Common Stock | −100.0K | $88.35 | −$8.84M | −11.1%802.7K after | 11 lots10b5-1 |
| May 21, 2026 (view filing) | May 19 | 2 days | Dun HaipingDirector | SSaleClass A Common Stock | −5.00K | $66.22 | −$331.1K | −100.0%0 after | 4 lots10b5-1 |
| Apr 21, 2026 (view filing) | Apr 17 | 4 days | Pappis Charles CDirector | SSaleClass A Common Stock | −5.00K | $52.00 | −$260.0K | −100.0%0 after | 10b5-1 |
| Mar 13, 2026 (view filing) | Mar 12 | 1 day | McKechnie MarkSee Remarks | SSaleClass A Common Stock | −98.6K | $45.58 | −$4.49M | −99.1%900 after | 6 lots10b5-1 |
| Mar 13, 2026 (view filing) | Mar 11-12 | 2 days | Wang David HSee Remarks | SSaleClass A Common Stock | −110.0K | $46.86 | −$5.15M | −12.1%802.7K after | 5 lots10b5-1 |
| Mar 12, 2026 (view filing) | Mar 10-11 | 2 days | Liu TracyDirector | SSaleClass A Common Stock | −60.0K | $47.51 | −$2.85M | −35.1%110.8K after | 4 lots10b5-1 |
Top 10 13F holders, Q2 2026
The largest institutional positions in ACM Research, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8,660,842 | $1.10B | 0.02% | +675,995+8.5% | Added |
| Vanguard Portfolio Management LLC | 3,349,436 | $425.0M | 0.02% | +1,145,605+52.0% | Added |
| Vanguard Capital Management LLC | 2,462,745 | $312.5M | 0.01% | +198,408+8.8% | Added |
| Capital World Investors | 2,398,036 | $304.3M | 0.04% | +2,398,036 | New |
| State Street Corp | 2,188,254 | $277.7M | 0.01% | +182,138+9.1% | Added |
| Geode Capital Management, LLC | 1,487,797 | $188.8M | 0.01% | +116,570+8.5% | Added |
| Invesco Ltd. | 1,170,080 | $148.5M | 0.01% | +382,979+48.7% | Added |
| Value Aligned Research Advisors, LLC | 1,053,949 | $133.7M | 0.80% | +98,022+10.3% | Added |
| Ward Ferry Management (BVI) Ltd | 969,200 | $123.0M | 18.56% | +969,200 | New |
| Dimensional Fund Advisors LP | 954,474 | $121.1M | 0.02% | +235,451+32.7% | Added |