ACMRACM Research, Inc.
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-05-21.
Insider buys (90d)
$0.00
Insider sells (90d)
$591.1K
Net flow
$-591.1K
Filings
2
Buy transactions
0
Sell transactions
5
Distinct insiders
2
Last close (cached)
$91.92
as of 2026-06-02
1d return
+12.0%
5d return
+6.3%
1m return
+76.3%
Top insiders trading ACMR (90d)
Recent transactions (7)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 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 → |
| 2026-04-21 | 2026-04-17 | Pappis Charles C | Sale | 5,000 | $52.00 | $260.0K | open → |
| 2026-04-21 | 2026-04-17 | Pappis Charles C | Exer. | 5,000 | $29.18 | $145.9K | open → |
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