ACM Research, Inc. (ACMR) Insider Ownership

Historic Insider Ownership Trends

ACMR's three largest insider shareholders as of March 23, 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).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Science Technology Venture Capital (Group) Co., Ltd. Shanghai 2,338,510 0 08 Oct, 2024
Xiao Xing 0 2,338,510 08 Oct, 2024
Yinan Xiang 0 1,146,170 24 Aug, 2021
David H Wang See Remarks 802,708 0 13 Mar, 2026
Jian Wang See Remarks 253,158 0 19 Sep, 2025
Tracy Liu 110,772 0 12 Mar, 2026
Chenming Hu 100,002 0 19 Mar, 2025
Sotheara Cheav See Remarks 100,002 0 19 Sep, 2025
Lisa Feng See Remarks 50,001 0 09 Mar, 2026
Mark Mckechnie See Remarks 900 0 13 Mar, 2026

* 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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
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 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
11 Mar, 2026 David H Wang Class A Common Stock D 4,627 $48.34 802,708 D S
12 Mar, 2026 Mark Mckechnie Class A Common Stock D 47,108 $45.74 1,882 D S
12 Mar, 2026 David H Wang Class A Common Stock A 50,000 $1.00 852,708 D M
12 Mar, 2026 Mark Mckechnie Class A Common Stock D 982 $46.55 900 D S
12 Mar, 2026 Mark Mckechnie Class A Common Stock A 38,551 $19.49 39,451 D M
12 Mar, 2026 David H Wang Class A Common Stock D 10,561 $44.92 842,147 D S
12 Mar, 2026 David H Wang Class A Common Stock D 38,737 $45.74 803,410 D S
12 Mar, 2026 Mark Mckechnie Class A Common Stock D 8,639 $44.94 30,812 D S
12 Mar, 2026 David H Wang Class A Common Stock D 702 $46.57 802,708 D S
12 Mar, 2026 Mark Mckechnie Class A Common Stock D 29,348 $45.74 1,464 D S
12 Mar, 2026 Mark Mckechnie Class A Common Stock D 564 $46.57 900 D S
12 Mar, 2026 Mark Mckechnie Stock Option D 60,000 $0.00 240,000 D M
12 Mar, 2026 Mark Mckechnie Stock Option D 38,551 $0.00 61,449 D M
11 Mar, 2026 David H Wang Stock Option D 60,000 $0.00 420,002 D M
12 Mar, 2026 David H Wang Stock Option D 50,000 $0.00 370,002 D M
10 Mar, 2026 Tracy Liu Class A Common Stock A 45,000 $1.00 155,772 D M