ACM Research, Inc. (ACMR) Insider Ownership

Historic Insider Ownership Trends

Data spanning the past 90 days through January 16, 2026 reveals that ACM Research's three principal insider shareholders consist of Director Yinan Xiang (3.44Mn shares), TenPercentOwner Science & Technology Venture Capital (Group) Co., Ltd. Shanghai (2.34Mn shares), Director Xiao Xing (2.34Mn shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Xiao Xing 2,338,510 08 Oct, 2024
Science & Technology Venture Capital (Group) Co., Ltd. Shanghai 2,338,510 08 Oct, 2024
Yinan Xiang 3,438,510 24 Aug, 2021
David H Wang Nan 802,708 05 Dec, 2025
Jian Wang See Remarks 253,158 19 Sep, 2025
Tracy Liu 110,772 19 Sep, 2025
Sotheara Cheav See Remarks 100,002 19 Sep, 2025
Chenming Hu 100,002 19 Mar, 2025
Haiping Dun 100,000 14 Nov, 2025
Lisa Feng See Remarks 50,001 14 Nov, 2025
Mark Mckechnie Nan 900 08 Dec, 2025

* 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
08 Dec, 2025 Mark Mckechnie Class A Common Stock A 22,500 $25.45 23,400 D M
08 Dec, 2025 Mark Mckechnie Class A Common Stock D 22,500 $35.45 900 D S
04 Dec, 2025 David H Wang Class A Common Stock A 60,000 $1.00 862,708 D M
04 Dec, 2025 David H Wang Class A Common Stock D 19,817 $33.52 842,891 D S
04 Dec, 2025 David H Wang Class A Common Stock D 40,183 $34.42 802,708 D S
04 Dec, 2025 Mark Mckechnie Class A Common Stock D 996 $34.26 900 D S
04 Dec, 2025 Mark Mckechnie Class A Common Stock D 7,754 $33.50 1,896 D S
04 Dec, 2025 Mark Mckechnie Class A Common Stock A 8,750 $4.55 9,650 D M
03 Dec, 2025 David H Wang Class A Common Stock D 68,800 $33.05 803,908 D S
03 Dec, 2025 David H Wang Class A Common Stock A 70,000 $1.00 872,708 D M
03 Dec, 2025 David H Wang Class A Common Stock D 1,200 $33.56 802,708 D S
03 Dec, 2025 Fuping Chen Class A Common Stock D 300 $33.57 0 D S
03 Dec, 2025 Fuping Chen Class A Common Stock D 19,700 $33.05 300 D S
03 Dec, 2025 Fuping Chen Class A Common Stock A 20,000 $1.77 20,000 D M
02 Dec, 2025 Fuping Chen Class A Common Stock D 100,000 $33.20 0 D S
02 Dec, 2025 Fuping Chen Class A Common Stock A 100,000 $1.77 100,000 D M
13 Nov, 2025 Lisa Feng Class A Common Stock A 15,000 $5.60 65,001 D M
13 Nov, 2025 Lisa Feng Class A Common Stock D 15,000 $33.77 50,001 D S
12 Nov, 2025 Haiping Dun Class A Common Stock D 755,090 $0.00 0 D G
12 Nov, 2025 Lisa Feng Class A Common Stock A 15,000 $5.60 65,001 D M