Wang David H (CIK 1721580) reported 43 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-06-05). Recent activity: Sell ACMR (10,992 shares), Buy ACMR (40,002 shares), Sell ACMR (6,295 shares), Sell ACMR (32,450 shares), Sell ACMR (9,925 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 10,992 | $946,081 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Buy | 40,002 | $40,002 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 6,295 | $560,129 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 32,450 | $2.9M |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 9,925 | $900,992 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 5,843 | $539,776 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 1,187 | $110,438 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 4,300 | $376,551 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 2,060 | $172,752 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 17,543 | $1.5M |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Buy | 60,000 | $60,000 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 8,581 | $747,663 |
| 2026-06-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 826 | $72,614 |
| 2026-03-13 | ACM Research, Inc. (ACMR) | See Remarks | Buy | 60,000 | $60,000 |
| 2026-03-13 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 55,373 | $2.7M |
| 2026-03-13 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 4,627 | $223,669 |
| 2026-03-13 | ACM Research, Inc. (ACMR) | See Remarks | Buy | 50,000 | $50,000 |
| 2026-03-13 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 10,561 | $474,400 |
| 2026-03-13 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 38,737 | $1.8M |
| 2026-03-13 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 702 | $32,692 |
| 2025-12-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 19,817 | $664,266 |
| 2025-12-05 | ACM Research, Inc. (ACMR) | See Remarks | Buy | 70,000 | $70,000 |
| 2025-12-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 68,800 | $2.3M |
| 2025-12-05 | ACM Research, Inc. (ACMR) | See Remarks | Sell | 1,200 | $40,272 |
| 2025-12-05 | ACM Research, Inc. (ACMR) | See Remarks | Buy | 60,000 | $60,000 |
Source: SEC Form 4 filings · as of 2026-06-05