$CSTM
Constellium SE Class A Ordinary shares
XNYS•Materials•Secondary Smelting & Refining of Nonferrous Metals
Why is CSTM down today? It is at $26.53 (-0.04%), and our scanner flagged it 54 times on unusual volume this month. See the catalyst behind the move, real-time alerts the moment CSTM spikes, and full due diligence on CSTM — key stats, earnings, dilution and insider activity. Free.
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Key Stats
- Price
- $26.53
- Change today
- -0.04%
- Previous close
- $26.54
- 52-week range
- $13.58 – $36.99
- Market cap
- $3.81B
- Shares outstanding
- 136.2M
- Total held
- 1.2%
- Tradeable float
- 134.6M 99% of shares · after 1% insiders + institutional n/a
- Short interest
- 6.2M ▼ -6% vs prior · as of 2026-07-31
- Short % of float
- 4.6%
- Days to cover
- 3.3d
- Avg daily volume
- 1.7M
- Sector
- Materials
- Industry
- Secondary Smelting & Refining of Nonferrous Metals
- Exchange
- XNYS
- 5m
- 0.4x
- 15m
- 0.7x
- 1h
- 0.8x
- 1D
- 0.3x
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Why is $CSTM moving today?
CSTM is one of today's most active names, trading on unusually heavy volume (live price and day move above). Our scanner has fired 6 unusual-volume and momentum alerts on CSTM today, peaking at 18.4x its normal volume.
Latest filingSC 13G/APassive 5%+ stake updatedAug 6, 2026 · 14 days agoAnalyst data via Nasdaq. Not investment advice.
Insiders
3 open-market buys1 buys, 3 sells last 3 months (25/26 over 12 months)Show 12 recent transactionsMinimize 12 recent transactions
| Insider | Action | Shares | % of position | Owns after | Value | Date |
|---|---|---|---|---|---|---|
Deslarzes Jean-Christophe Director | Bought (open market) | +1K | added 3.5% | 44K | $41K at $27.24 | Aug 3, 26 |
Joerg Ingrid Officer | Sold (automatic/other) | -3K | sold 0.7% | 406K | $87K at $29.28 | Jul 10, 26 |
Ormerod John Director | Sold (automatic/other) | -8K | sold 24% | 25K | $280K at $35.01 | Jun 4, 26 |
Becker Marcus Officer | Sold (automatic/other) | -10K | sold 38% | 17K | $363K at $34.93 | May 28, 26 |
Jarrett Martin Officer | Sold (automatic/other) | -5K | sold 23% | 15K | $158K at $33.46 | May 14, 26 |
Soultz Bradley Lee Director | Bought (open market) | +3K | n/a | 3K | $85K at $33.84 | May 14, 26 |
Piquier Ludovic Officer | Sold (automatic/other) | -1K | sold 0.4% | 242K | $34K at $33.57 | May 12, 26 |
Brun Nicolas Officer | Sold (automatic/other) | -27K 0.02% of company | sold 20% | 105K | $902K at $33.85 | May 11, 26 |
Corre Stephane Officer | Sold (automatic/other) | -5K | sold 7.4% | 62K | $168K at $33.52 | May 8, 26 |
Guo Jack Q. Officer | Sold (automatic/other) | -25K 0.02% of company | sold 12% | 185K | $822K at $32.62 | May 5, 26 |
Brandjes Michiel Director | Sold (automatic/other) | -10K | sold 20% | 42K | $325K at $31.25 | May 5, 26 |
Deslarzes Jean-Christophe Director | Bought (open market) | +1K | added 3.3% | 42K | $41K at $31.13 | May 1, 26 |
Recent Form-4 filings via Nasdaq. Open-market buys are the signal worth watching. Grants and automatic (10b5-1) sells are routine. “% of position” is the share of that insider’s own holding the trade moved. Not investment advice.
$CSTM Sentiment
NeutralBlend of news sentiment, today’s move, and community votes. Not investment advice.
$CSTM Activity
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CSTM stock FAQ
Why is $CSTM moving today?
CSTM is one of today's most active names, trading on unusually heavy volume (live price and day move above). Our scanner has fired 6 unusual-volume and momentum alerts on CSTM today, peaking at 18.4x its normal volume.
What is the CSTM stock price today?
CSTM last traded at $26.53, down 0.04% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
Where can I see live CSTM alerts?
The CSTM Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged CSTM 54 times in the last 30 days.
What exchange is CSTM on?
CSTM (Constellium SE Class A Ordinary shares) trades on XNYS, with a market cap of about $3.81B in the SECONDARY SMELTING & REFINING OF NONFERROUS METALS sector.
Is CSTM good for day trading?
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge CSTM for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.