NASDAQ
ACM Research, Inc. (ACMR) has had 35 insider transactions recently, with net insider activity of -$129K (net selling). The most active insider is Dun Haiping (Director).
Total Transactions
35
6 buys /29 sells
Shares Acquired
128,752
Transactions: 6•Avg: 21,458.67
Shares Disposed
257,504
Transactions: 29•Avg: 8,879.45
Net Activity
-128,752
Net Selling•Ratio: 20.69%
Q2 2026(Current) | 128,752 | 257,504 | -128,752 | 20.69% |
Q1 2026 | 838,951 | 602,102 | +236,849 | 32.26% |
Q4 2025 | 841,650 | 1,377,590 | -535,940 | 38.10% |
Q3 2025 | 446,152 | 702,304 | -256,152 | 59.09% |
Q2 2025 | 160,000 | 320,000 | -160,000 | 44.44% |
This table shows insider trading activity by quarter. A ratio > 100% indicates insiders acquired more shares than they disposed of during the period, which is generally considered a bullish signal.
• Most recent data for Q2 2026
Acquired vs Disposed Shares
Net Distribution: 128,752 shares•Acquired/Disposed Ratio: 20.69%
Net Activity | |||||
|---|---|---|---|---|---|
DH Dun Haiping | Director | 11 | 10,000 | 775,090 | -765,090 |
WDH Wang David H | Director, 10 percent owner, officer: see remarks | 33 | 885,402 | 680,004 | +205,398 |
MM McKechnie Mark | Officer: see remarks | 17 | 129,801 | 259,602 | -129,801 |
CF Chen Fuping | Officer: see remarks | 7 | 120,000 | 240,000 | -120,000 |
LT Liu Tracy | Director | 8 | 60,000 | 120,000 | -60,000 |
This table shows the trading activity of the most active company insiders. Positive net activity (buying more than selling) is often considered a bullish signal.
2026-06-04 | Officer: see remarks | Purchase | 13,351 | $13.89 | $185,445.39 | 113,353 | |
2026-06-04 | Officer: see remarks | Sale | 1,300 | $84.08 | $109,304 | 112,053 | |
2026-06-05 | Officer: see remarks | Purchase | 5,399 | $13.89 | $74,992.11 | 105,401 | |
2026-06-05 | Officer: see remarks | Sale | 2,384 | $81.73 | $194,844.32 | 103,017 | |
2026-06-04 | Officer: see remarks | Sale | 9,212 | $85.11 | $784,033.32 | 102,841 |
This table displays recent Form 4 filings showing transactions by company insiders. SEC rules require insiders to report their transactions within two business days.
CS Cheav Sotheara | Officer: see remarks | Jun 5, 2026 | |
CS Cheav Sotheara | Officer: see remarks | Jun 5, 2026 | |
CS Cheav Sotheara | Officer: see remarks | Jun 5, 2026 | |
CS Cheav Sotheara | Officer: see remarks | Jun 5, 2026 | |
CS Cheav Sotheara | Officer: see remarks | Jun 5, 2026 |
Net change in shares shown on right
No price data available for this timeframe.