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sellModerate cluster of 310b5-1 plan

Fuping Chen sold $4.0M of ACMR

See remarks at ACM Research, Inc.. 120,000 shares at an average of $33.18, traded Dec 2, 2025, filed Dec 4, 2025.

Warning score
40
Value
$4.0M
120,000 shares
Holdings after
0
-120% from before
From 52-week low
+133%
low $14.10, close $32.87
From 52-week high
-25%
high $43.78, as of Dec 2, 2025

Score components

  • Role
    Officer
    +15
  • Trade size
    $4.0M at market
    +25
  • Share of holdings sold
    Sold 100% of holdings
    +20
  • Cluster
    3 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m +29.6%, 3m +39.5%, 6m +160.6%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

ACMROct 13, 2026 · close 64.83
Since filing Dec 4, 2025: +87.3%SPY +14.9% · excess +72.4%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001140361-25-044360, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 2, 2025MOption exercise
Class A Common Stock10b5-1
+100,000$1.77$177k100,000Dec 4, 2025
Dec 2, 2025SOpen-market sale
Class A Common Stock10b5-1
-100,000$33.20$3.3M0Dec 4, 2025
Dec 3, 2025MOption exercise
Class A Common Stock10b5-1
+20,000$1.77$35k20,000Dec 4, 2025
Dec 3, 2025SOpen-market sale
Class A Common Stock10b5-1
-19,700$33.05$651k300Dec 4, 2025
Dec 3, 2025SOpen-market sale
Class A Common Stock10b5-1
-300$33.57$10k0Dec 4, 2025
Dec 2, 2025MOption exercise
Stock Optionderivative10b5-1
-100,000$0.00$041,165Dec 4, 2025
Dec 3, 2025MOption exercise
Stock Optionderivative10b5-1
-20,000$0.00$021,165Dec 4, 2025

Related signals

Other insiders at ACM Research, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
10Weak
ACMRsell10b5-1
ACM Research, Inc.
David H Wang
See Remarks
$11M
140,000 shares
-16%
33Weak
ACMRsell 210b5-1
ACM Research, Inc.
Mark McKechnie
See Remarks
$4.3M
55,199 shares
-98%
24Weak
ACMRsell 210b5-1
ACM Research, Inc.
Haiping Dun
director
$406k
5,000 shares
-100%
18Weak
ACMRsell 210b5-1
ACM Research, Inc.
David H Wang
See Remarks
$8.8M
100,002 shares
-12%
18Weak
ACMRsell 210b5-1
ACM Research, Inc.
Sotheara Cheav
See remarks
$1.6M
18,750 shares
-17%
15Weak
ACMRsell10b5-1
ACM Research, Inc.
Haiping Dun
director
$331k
5,000 shares
-100%
13Weak
ACMRsell10b5-1
ACM Research, Inc.
Charles C Pappis
director
$260k
5,000 shares
-100%
25Weak
ACMRsell 610b5-1
ACM Research, Inc.
David H Wang
See Remarks
$5.2M
110,000 shares
-13%
40Moderate
ACMRsell 610b5-1
ACM Research, Inc.
Mark McKechnie
See Remarks
$4.5M
98,551 shares
-162%
30Weak
ACMRsell 610b5-1
ACM Research, Inc.
Tracy Liu
director
$2.9M
60,000 shares
-39%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Fuping Chen sold $4.0M of ACMR | InsiderTell