ACMR ACM Research

• None no insider bought on the open market
• None no sales outside a trading plan
• $51.2M sold by 8 insiders under 10b5-1 plans

1. Insider
   Trade
   Value
   Traded, filed
2. David H Wang See Remarks
   Planned sale
   $10.6M 140,000 shares at $75.93 15% of stake
   Traded Sep 8–9 Filed Sep 10
   ↗
3. Mark McKechnie See Remarks
   Planned sale
   $4.3M 55,199 shares at $77.27 98% of stake
   Traded Aug 20 Filed Aug 21
   ↗
4. Haiping Dun Director
   Planned sale
   $406K 5,000 shares at $81.13 100% of stake
   Traded Aug 18 Filed Aug 20
   ↗
5. Sotheara Cheav See remarks
   Planned sale
   $1.6M 18,750 shares at $84.58 16% of stake
   Traded Jun 4–5 Filed Jun 5
   ↗
6. David H Wang See Remarks
   Planned sale
   $8.8M 100,002 shares at $88.35 11% of stake
   Traded Jun 3–4 Filed Jun 5
   ↗
7. Haiping Dun Director
   Planned sale
   $331K 5,000 shares at $66.22 100% of stake
   Traded May 19 Filed May 21
   ↗
8. Charles C Pappis Director
   Planned sale
   $260K 5,000 shares at $52.00 100% of stake
   Traded Apr 17 Filed Apr 21
   ↗
9. Mark McKechnie See Remarks
   Planned sale
   $4.5M 98,551 shares at $45.58 99% of stake
   Traded Mar 12 Filed Mar 13
   ↗
10. David H Wang See Remarks
    Planned sale
    $5.2M 110,000 shares at $46.86 12% of stake
    Traded Mar 11–12 Filed Mar 13
    ↗
11. Tracy Liu Director
    Planned sale
    $2.9M 60,000 shares at $47.51 35% of stake
    Traded Mar 10–11 Filed Mar 12
    ↗
12. Haiping Dun Director
    Planned sale
    $217K 5,000 shares at $43.47 100% of stake
    Traded Mar 9 Filed Mar 11
    ↗
13. Charles C Pappis Director
    Planned sale
    $250K 5,000 shares at $50.09 100% of stake
    Traded Mar 5 Filed Mar 9
    ↗
14. Lisa Feng See remarks
    Planned sale
    $1.4M 30,000 shares at $48.04 38% of stake
    Traded Mar 5–6 Filed Mar 9
    ↗
15. Mark McKechnie See Remarks
    Planned sale
    $1.1M 31,250 shares at $34.93 97% of stake
    Traded Dec 4–8 Filed Dec 8, 2025
    ↗
16. David H Wang See Remarks
    Planned sale
    $4.4M 130,000 shares at $33.55 14% of stake
    Traded Dec 3–4 Filed Dec 5, 2025
    ↗

Also filed in the last 12 months, not counted as buying or selling: 29 option exercises and 1 gift.