ACMRACM Research, Inc.
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-09-10.
Insider buys (90d)
$0.00
Insider sells (90d)
$15.30M
Net flow
$-15.30M
Filings
3
Buy transactions
0
Sell transactions
15
Distinct insiders
3
Last close (cached)
$83.38
as of 2026-10-02
1d return
-0.2%
5d return
+7.9%
1m return
+19.3%
Top insiders trading ACMR (90d)
Recent transactions (20)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-10 | 2026-09-09 | Wang David H | Sale | 1,100 | $77.59 | $85.3K | open → |
| 2026-09-10 | 2026-09-09 | Wang David H | Sale | 4,807 | $76.73 | $368.8K | open → |
| 2026-09-10 | 2026-09-09 | Wang David H | Sale | 11,666 | $75.58 | $881.7K | open → |
| 2026-09-10 | 2026-09-09 | Wang David H | Sale | 18,934 | $74.67 | $1.41M | open → |
| 2026-09-10 | 2026-09-09 | Wang David H | Sale | 33,493 | $73.80 | $2.47M | open → |
| 2026-09-10 | 2026-09-09 | Wang David H | Exer. | 70,000 | $1.00 | $70.0K | open → |
| 2026-09-10 | 2026-09-08 | Wang David H | Sale | 1,500 | $78.57 | $117.9K | open → |
| 2026-09-10 | 2026-09-08 | Wang David H | Sale | 12,323 | $78.08 | $962.2K | open → |
| 2026-09-10 | 2026-09-08 | Wang David H | Sale | 51,374 | $77.15 | $3.96M | open → |
| 2026-09-10 | 2026-09-08 | Wang David H | Sale | 4,803 | $75.99 | $365.0K | open → |
| 2026-09-10 | 2026-09-08 | Wang David H | Exer. | 70,000 | $1.00 | $70.0K | open → |
| 2026-08-22 | 2026-08-20 | McKechnie Mark | Sale | 11,209 | $77.89 | $873.1K | open → |
| 2026-08-22 | 2026-08-20 | McKechnie Mark | Sale | 30,365 | $77.45 | $2.35M | open → |
| 2026-08-22 | 2026-08-20 | McKechnie Mark | Sale | 13,625 | $76.34 | $1.04M | open → |
| 2026-08-22 | 2026-08-20 | McKechnie Mark | Exer. | 25,000 | $13.89 | $347.3K | open → |
| 2026-08-22 | 2026-08-20 | McKechnie Mark | Exer. | 30,199 | $19.49 | $588.6K | open → |
| 2026-08-20 | 2026-08-18 | Dun Haiping | Sale | 400 | $82.17 | $32.9K | open → |
| 2026-08-20 | 2026-08-18 | Dun Haiping | Sale | 3,400 | $81.31 | $276.5K | open → |
| 2026-08-20 | 2026-08-18 | Dun Haiping | Sale | 1,200 | $80.29 | $96.3K | open → |
| 2026-08-20 | 2026-08-18 | Dun Haiping | Exer. | 5,000 | $5.60 | $28.0K | open → |
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