ACMRACM Research, Inc.
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-06-06.
Insider buys (90d)
$0.00
Insider sells (90d)
$10.75M
Net flow
$-10.75M
Filings
3
Buy transactions
0
Sell transactions
22
Distinct insiders
3
Last close (cached)
$78.64
as of 2026-08-03
1d return
+0.2%
5d return
-1.7%
1m return
-19.6%
Top insiders trading ACMR (90d)
Recent transactions (27)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-06-06 | 2026-06-05 | Cheav Sotheara | Sale | 1,647 | $85.41 | $140.7K | open → |
| 2026-06-06 | 2026-06-05 | Cheav Sotheara | Sale | 400 | $84.01 | $33.6K | open → |
| 2026-06-06 | 2026-06-05 | Cheav Sotheara | Sale | 968 | $82.61 | $80.0K | open → |
| 2026-06-06 | 2026-06-05 | Cheav Sotheara | Sale | 2,384 | $81.73 | $194.8K | open → |
| 2026-06-06 | 2026-06-05 | Cheav Sotheara | Exer. | 5,399 | $13.89 | $75.0K | open → |
| 2026-06-06 | 2026-06-04 | Cheav Sotheara | Sale | 2,839 | $85.77 | $243.5K | open → |
| 2026-06-06 | 2026-06-04 | Cheav Sotheara | Sale | 9,212 | $85.11 | $784.0K | open → |
| 2026-06-06 | 2026-06-04 | Cheav Sotheara | Sale | 1,300 | $84.08 | $109.3K | open → |
| 2026-06-06 | 2026-06-04 | Cheav Sotheara | Exer. | 13,351 | $13.89 | $185.4K | open → |
| 2026-06-05 | 2026-06-04 | Wang David H | Sale | 826 | $87.91 | $72.6K | open → |
| 2026-06-05 | 2026-06-04 | Wang David H | Sale | 8,581 | $87.13 | $747.7K | open → |
| 2026-06-05 | 2026-06-04 | Wang David H | Sale | 10,992 | $86.07 | $946.1K | open → |
| 2026-06-05 | 2026-06-04 | Wang David H | Sale | 17,543 | $85.11 | $1.49M | open → |
| 2026-06-05 | 2026-06-04 | Wang David H | Sale | 2,060 | $83.86 | $172.8K | open → |
| 2026-06-05 | 2026-06-04 | Wang David H | Exer. | 40,002 | $1.00 | $40.0K | open → |
| 2026-06-05 | 2026-06-03 | Wang David H | Sale | 1,187 | $93.04 | $110.4K | open → |
| 2026-06-05 | 2026-06-03 | Wang David H | Sale | 5,843 | $92.38 | $539.8K | open → |
| 2026-06-05 | 2026-06-03 | Wang David H | Sale | 9,925 | $90.78 | $901.0K | open → |
| 2026-06-05 | 2026-06-03 | Wang David H | Sale | 32,450 | $89.84 | $2.92M | open → |
| 2026-06-05 | 2026-06-03 | Wang David H | Sale | 6,295 | $88.98 | $560.1K | open → |
| 2026-06-05 | 2026-06-03 | Wang David H | Sale | 4,300 | $87.57 | $376.6K | open → |
| 2026-06-05 | 2026-06-03 | Wang David H | Exer. | 60,000 | $1.00 | $60.0K | open → |
| 2026-05-21 | 2026-05-19 | Dun Haiping | Sale | 1,858 | $67.54 | $125.5K | open → |
| 2026-05-21 | 2026-05-19 | Dun Haiping | Sale | 1,309 | $67.21 | $88.0K | open → |
| 2026-05-21 | 2026-05-19 | Dun Haiping | Sale | 500 | $65.09 | $32.5K | open → |
| 2026-05-21 | 2026-05-19 | Dun Haiping | Sale | 1,333 | $63.84 | $85.1K | open → |
| 2026-05-21 | 2026-05-19 | Dun Haiping | Exer. | 5,000 | $5.60 | $28.0K | open → |
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