ACM Research's top three insider shareholders as of June 06, 2026 are Xiao Xing (Director, 2.34Mn shares), Science Technology Venture Capital (Group) Co., Ltd. Shanghai (TenPercentOwner, 2.34Mn shares), Yinan Xiang (Director, 1.15Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Chenming Hu | - | 100,002 | 0 | 19 Mar, 2025 |
| Sotheara Cheav | - | 100,002 | 0 | 19 Sep, 2025 |
| Tracy Liu | - | 110,772 | 0 | 12 Mar, 2026 |
| David H Wang | - | 802,708 | 0 | 13 Mar, 2026 |
| Yinan Xiang | - | 0 | 1,146,170 | 24 Aug, 2021 |
| Jian Wang | - | 253,158 | 0 | 19 Sep, 2025 |
| Mark Mckechnie | - | 900 | 0 | 13 Mar, 2026 |
| Lisa Feng | - | 50,001 | 0 | 09 Mar, 2026 |
| Xiao Xing | - | 0 | 2,338,510 | 08 Oct, 2024 |
| Science Technology Venture Capital (Group) Co., Ltd. Shanghai | - | 2,338,510 | 0 | 08 Oct, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 17 Apr, 2026 | Charles C Pappis | Class A Common Stock | A | 5,000 | $29.18 | 5,000 | D | M |
| 17 Apr, 2026 | Charles C Pappis | Class A Common Stock | D | 5,000 | $52.00 | 0 | D | S |
| 17 Apr, 2026 | Charles C Pappis | Stock Option | D | 5,000 | $0.00 | 0 | D | M |
| 12 Mar, 2026 | Mark Mckechnie | Class A Common Stock | A | 60,000 | $13.89 | 60,900 | D | M |
| 12 Mar, 2026 | Mark Mckechnie | Class A Common Stock | A | 60,000 | $13.89 | 60,900 | D | M |
| 11 Mar, 2026 | David H Wang | Class A Common Stock | A | 60,000 | $1.00 | 862,708 | D | M |
| 12 Mar, 2026 | Mark Mckechnie | Class A Common Stock | A | 60,000 | $13.89 | 60,900 | D | M |
| 11 Mar, 2026 | David H Wang | Class A Common Stock | A | 60,000 | $1.00 | 862,708 | D | M |
| 11 Mar, 2026 | David H Wang | Class A Common Stock | A | 60,000 | $1.00 | 862,708 | D | M |
| 11 Mar, 2026 | David H Wang | Class A Common Stock | D | 55,373 | $47.89 | 807,335 | D | S |
| 11 Mar, 2026 | David H Wang | Class A Common Stock | D | 55,373 | $47.89 | 807,335 | D | S |
| 11 Mar, 2026 | David H Wang | Class A Common Stock | D | 55,373 | $47.89 | 807,335 | D | S |
| 12 Mar, 2026 | Mark Mckechnie | Class A Common Stock | D | 11,910 | $44.89 | 48,990 | D | S |
| 12 Mar, 2026 | Mark Mckechnie | Class A Common Stock | D | 11,910 | $44.89 | 48,990 | D | S |
| 12 Mar, 2026 | Mark Mckechnie | Class A Common Stock | D | 11,910 | $44.89 | 48,990 | D | S |
| 12 Mar, 2026 | Mark Mckechnie | Class A Common Stock | D | 47,108 | $45.74 | 1,882 | D | S |
| 12 Mar, 2026 | Mark Mckechnie | Class A Common Stock | D | 47,108 | $45.74 | 1,882 | D | S |
| 11 Mar, 2026 | David H Wang | Class A Common Stock | D | 4,627 | $48.34 | 802,708 | D | S |
| 11 Mar, 2026 | David H Wang | Class A Common Stock | D | 4,627 | $48.34 | 802,708 | D | S |
| 11 Mar, 2026 | David H Wang | Class A Common Stock | D | 4,627 | $48.34 | 802,708 | D | S |