ACMR ACM Research, Inc.
ACM Research, Inc. (ACMR) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 100% planned / 0% discretionary
Largest single sale: $4.0M.
Where they traded
No open-market insider purchase on record.
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| Wang David H 5 fills | See Remarks | Sell 10b5-1 | 70,000 | $74.59 | $5.2M | 839,215 −7.7% of holding | |
| Wang David H 4 fills | See Remarks | Sell 10b5-1 | 70,000 | $77.26 | $5.4M | 867,905 −7.5% of holding | |
| McKechnie Mark 3 fills | See Remarks | Sell 10b5-1 | 55,199 | $77.27 | $4.3M | 42,474 −56.5% of holding | |
| Dun Haiping 3 fills | Director | Sell 10b5-1 | 5,000 | $81.13 | $405.7K | 3,800 −56.8% of holding | |
| Cheav Sotheara 4 fills | See remarks | Sell 10b5-1 | 5,399 | $83.18 | $449.1K | 103,017 −5% of holding | |
| Wang David H 5 fills | See Remarks | Sell 10b5-1 | 40,002 | $85.80 | $3.4M | 840,650 −4.5% of holding | |
| Cheav Sotheara 3 fills | See remarks | Sell 10b5-1 | 13,351 | $85.15 | $1.1M | 112,053 −10.6% of holding | |
| Wang David H 6 fills | See Remarks | Sell 10b5-1 | 60,000 | $90.05 | $5.4M | 858,408 −6.5% of holding | |
| Dun Haiping 4 fills | Director | Sell 10b5-1 | 5,000 | $66.22 | $331.1K | 3,667 −57.7% of holding | |
| Pappis Charles C | Director | Sell 10b5-1 | 5,000 | $52.00 | $260.0K | None left |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.