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sellModerate cluster of 9

Isabelle Boccon-Gibod sold $258k of CSTM

director at CONSTELLIUM SE. 10,000 shares at an average of $25.77, traded Feb 26, 2026, filed Feb 27, 2026.

Warning score
53
Value
$258k
10,000 shares
Holdings after
23,000
-30% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    Director
    +15
  • Trade size
    $258k at market
    +13
  • Share of holdings sold
    Sold 30% of holdings
    +10
  • Cluster
    9 insiders selling within 14 days
    +15

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 -6.1%, 3m +37.6%, 6m +8.4%.

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.

CSTMOct 9, 2026 · close 25.81
Since filing Feb 27, 2026: +3.7%SPY +14.3% · excess -10.6%

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 0001563411-26-000063, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Feb 26, 2026SOpen-market sale
Ordinary shares
-10,000$25.77$258k23,000Feb 27, 2026

Related signals

Other insiders at CONSTELLIUM SE and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
25Weak
CSTMbuy
CONSTELLIUM SE
Jean-Christophe Deslarzes
director
$41k
1,490 shares
+4%
42Moderate
CSTMsell 2
CONSTELLIUM SE
John Ormerod
director
$280k
8,000 shares
-24%
55Moderate
CSTMsell 3
CONSTELLIUM SE
Marcus Becker
SVP CPO
$363k
10,391 shares
-38%
40Moderate
CSTMbuy 2
CONSTELLIUM SE
Bradley Lee Soultz
director
$85k
2,500 shares
-
46Moderate
CSTMsell 9
CONSTELLIUM SE
Martin Jarrett
SVP Chief Innovation Officer
$158k
4,716 shares
-23%
36Weak
CSTMsell 8
CONSTELLIUM SE
Ludovic Piquier
SVP Manuf Excellence & CTO
$34k
1,000 shares
-0%
59Moderate
CSTMsell 8
CONSTELLIUM SE
Nicolas Brun
SVP PA, Comm & Sust
$902k
26,661 shares
-20%
46Moderate
CSTMsell 8
CONSTELLIUM SE
Stephane Corre
President, AS&I
$168k
5,000 shares
-7%
49Moderate
CSTMsell 8
CONSTELLIUM SE
Michiel Brandjes
director
$325k
10,400 shares
-20%
65Notable
CSTMsell 8
CONSTELLIUM SE
Jack Q. Guo
EVP & CFO
$822k
25,201 shares
-12%

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.

Isabelle Boccon-Gibod sold $258k of CSTM | InsiderTell