9 insiders reported 133 Form 4 transactions for ACM Research, Inc. (ACMR) over the past 18 months (most recent 2026-09-10). Recent activity: Wang David H (See Remarks) Buy 70,000 shares, Wang David H (See Remarks) Sell 4,803 shares, Wang David H (See Remarks) Sell 51,374 shares, Wang David H (See Remarks) Sell 12,323 shares, Wang David H (See Remarks) Sell 1,500 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-10 | Wang David H | See Remarks | Buy | 70,000 | $70,000 |
| 2026-09-10 | Wang David H | See Remarks | Sell | 4,803 | $364,980 |
| 2026-09-10 | Wang David H | See Remarks | Sell | 51,374 | $4.0M |
| 2026-09-10 | Wang David H | See Remarks | Sell | 12,323 | $962,180 |
| 2026-09-10 | Wang David H | See Remarks | Sell | 1,500 | $117,855 |
| 2026-09-10 | Wang David H | See Remarks | Buy | 70,000 | $70,000 |
| 2026-09-10 | Wang David H | See Remarks | Sell | 33,493 | $2.5M |
| 2026-09-10 | Wang David H | See Remarks | Sell | 18,934 | $1.4M |
| 2026-09-10 | Wang David H | See Remarks | Sell | 11,666 | $881,716 |
| 2026-09-10 | Wang David H | See Remarks | Sell | 4,807 | $368,841 |
| 2026-09-10 | Wang David H | See Remarks | Sell | 1,100 | $85,349 |
| 2026-08-21 | McKechnie Mark | Chief Financial Officer and Treasurer | Buy | 25,000 | $347,250 |
| 2026-08-21 | McKechnie Mark | Chief Financial Officer and Treasurer | Buy | 30,199 | $588,579 |
| 2026-08-21 | McKechnie Mark | Chief Financial Officer and Treasurer | Sell | 13,625 | $1.0M |
| 2026-08-21 | McKechnie Mark | Chief Financial Officer and Treasurer | Sell | 30,365 | $2.4M |
| 2026-08-21 | McKechnie Mark | Chief Financial Officer and Treasurer | Sell | 11,209 | $873,069 |
| 2026-08-20 | Dun Haiping | Director | Buy | 5,000 | $28,000 |
| 2026-08-20 | Dun Haiping | Director | Sell | 1,200 | $96,348 |
| 2026-08-20 | Dun Haiping | Director | Sell | 3,400 | $276,454 |
| 2026-08-20 | Dun Haiping | Director | Sell | 400 | $32,868 |
| 2026-06-05 | Wang David H | Chief Executive Officer, President and Director | Buy | 60,000 | $60,000 |
| 2026-06-05 | Wang David H | Chief Executive Officer, President and Director | Sell | 4,300 | $376,551 |
| 2026-06-05 | Wang David H | Chief Executive Officer, President and Director | Sell | 6,295 | $560,129 |
| 2026-06-05 | Wang David H | Chief Executive Officer, President and Director | Sell | 32,450 | $2.9M |
| 2026-06-05 | Wang David H | Chief Executive Officer, President and Director | Sell | 9,925 | $900,992 |
Source: SEC Form 4 filings · as of 2026-09-10