Companies / ACM Research Inc
ACM Research Inc
Nasdaq: ACMRCIK 1680062FREMONT, CA
Financials · FY2025
Ownership
69.6M shares outstanding · as of Aug 4, 2026
Ownership
Share classes
| Class A | 92.83% | |
| Class B | 7.17% |
| Insiders | 1.38% | 964,381 |
| Institutions | 66.34% | 46,206,879 |
| Public float | 32.27% | 22,477,936 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 6
View all →| Insider | % of shares | Shares |
|---|---|---|
Wang David HSee Remarks · Director · 10% owner | 1.15% | 802,708 |
Liu TracyDirector | 0.16% | 110,772 |
Feng LisaSee remarks | 0.07% | 50,001 |
McKechnie MarkSee Remarks | <0.01% | 900 |
Dun HaipingDirector | 0.00% | 0 |
Pappis Charles CDirector | 0.00% | 0 |
Institutional holders 292
View all →| Holder | Value | % of shares |
|---|---|---|
| $1.10B | 12.43% | |
| $277.67M | 3.14% | |
| $196.15M | 7.14% | |
| $76.14M | 2.77% | |
| $70.58M | 2.67% | |
| $66.28M | 2.41% | |
| $54.93M | 2.00% | |
| $53.97M | 1.97% | |
| $52.95M | 1.93% | |
| $42.70M | 1.56% |
Activity
InsidersInstitutions
What insiders are doing in this stock (Form 4).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Mar 11, 2026 | Wang David H Executive | Sell | Class A Common Stock | $2.65M | -55K -6.42% | 807,335 1.16% of shares | medium |
| Mar 12, 2026 | McKechnie Mark Executive | Sell | Class A Common Stock | $2.15M | -47K -96.16% | 1,882 <0.01% of shares | medium |
| Mar 12, 2026 | Wang David H Executive | Sell | Class A Common Stock | $1.77M | -39K -4.60% | 803,410 1.15% of shares | medium |
| Mar 10, 2026 | Liu Tracy Director | Sell | Class A Common Stock | $1.52M | -32K -20.68% | 123,556 0.18% of shares | medium |
| Mar 12, 2026 | McKechnie Mark Executive | Sell | Class A Common Stock | $1.34M | -29K -95.25% | 1,464 <0.01% of shares | medium |
| Mar 12, 2026 | McKechnie Mark Executive | Exercise | Class A Common Stock | $833.4K | +60K +6666.67% | 60,900 0.09% of shares | low |
| Mar 12, 2026 | McKechnie Mark Executive | Exercise | Class A Common Stock | $751.4K | +39K +4283.44% | 39,451 0.06% of shares | low |
| Mar 6, 2026 | Feng Lisa Executive | Sell | Class A Common Stock | $681.8K | -15K -22.77% | 50,201 0.07% of shares | medium |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Vanguard Group Inc | Passive13G/A | — |
| Vanguard Group Inc | Passive13G/A | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| ACMR | — | 00108J109 |