CONSTELLIUM SE (CSTM) stock: insider trades, news & valuation
Net sellingShare price and insider trades
CONSTELLIUM SE insider trading at a glance (Oct 9, 2026): in the past 12 months, 2 insiders bought $208K and 13 sold $12.2M of CSTM stock on the open market.
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CSTM insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | $41K | 1 | — | 0 |
| Q2 2026 | $126K | 2 | $6.4M | 11 |
| Q1 2026 | $41K | 1 | $5.8M | 15 |
Valuation, profit and volume
Summary
Over the past 12 months, 2 CONSTELLIUM SE insiders reported open-market purchases totaling $208K, while 13 insiders reported sales totaling $12.2M. Among insiders with enough purchase history to measure, Jean-christophe Deslarzes (Director) has the highest Insider Score at 59. 0 of 26 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Aug 3SEC | Jean-christophe DeslarzesDirector | Buy | 1,49043,515 held (+4%) | $27.24 | $41K | -5.2% | 59 |
| Jun 8SEC | John OrmerodDirector | Sell | 8,00024,873 held (−24%) | $35.01 | $280K | -26.3% | — |
| Jun 1SEC | Marcus BeckerSvp Cpo | Sell | 10,39116,784 held (−38%) | $34.93 | $363K | -26.1% | — |
| May 18SEC | Martin JarrettSvp Chief Innovation Officer | Sell | 4,71615,375 held (−23%) | $33.46 | $158K | -22.9% | — |
| May 18SEC | Bradley Lee SoultzDirector | Buy | 2,500new position | $33.84 | $85K | -23.7% | — |
| May 13SEC | Ludovic PiquierCTO | Sell | 1,000241,713 held (−0%) | $33.57 | $34K | -23.1% | — |
| May 12SEC | Nicolas BrunSvp Pa, Comm & Sust | Sell | 26,661104,891 held (−20%) | $33.85 | $902K | -23.8% | — |
| May 12SEC | Stephane CorrePresident | Sell | 5,00062,313 held (−7%) | $33.52 | $168K | -23.0% | — |
| May 7SEC | Jack Q. GuoCFO | Sell | 25,201185,368 held (−12%) | $32.62 | $822K | -20.9% | — |
| May 7SEC | Michiel BrandjesDirector | Sell | 10,40041,600 held (−20%) | $31.25 | $325K | -17.4% | — |
| May 5SEC | Philippe HoffmannPresident | Sell | 50,000144,153 held (−26%) | $31.92 | $1.6M | -19.1% | — |
| May 4SEC | Philip Ryan JurkovicSvp & Chro | Sell | 48,784172,149 held (−22%) | $32.01 | $1.6M | -19.4% | — |
| May 4SEC | Stephane CorrePresident | Sell | 5,00067,313 held (−7%) | $32.04 | $160K | -19.4% | — |
| May 1SEC | Jean-christophe DeslarzesDirector | Buy | 1,32542,025 held (+3%) | $31.13 | $41K | -17.1% | 59 |
| Mar 17SEC | Marcus BeckerSvp Cpo | Sell | 10,00027,175 held (−27%) | $25.09 | $251K | +2.9% | — |
| Mar 17SEC | Jean-christophe DeslarzesDirector | Buy | 1,66540,700 held (+4%) | $24.77 | $41K | +4.2% | 59 |
| Mar 12SEC | Stephane CorrePresident | Sell | 1,50065,020 held (−2%) | $25.89 | $39K | -0.3% | — |
| Mar 11SEC | Jack Q. GuoCFO | Sell | 41,717190,879 held (−18%) | $25.87 | $1.1M | -0.2% | — |
| Mar 11SEC | Philip Ryan JurkovicSvp & Chro | Sell | 29,900210,723 held (−12%) | $25.87 | $774K | -0.2% | — |
| Mar 11SEC | Nicolas BrunSvp Pa, Comm & Sust | Sell | 17,701103,466 held (−15%) | $24.67 | $437K | +4.6% | — |
| Mar 11SEC | Philippe HoffmannPresident | Sell | 4,728182,120 held (−3%) | $25.87 | $122K | -0.2% | — |
| Mar 11SEC | Ingrid JoergCEO | Sell | 4,614378,090 held (−1%) | $25.87 | $119K | -0.2% | — |
| Mar 11SEC | Marcus BeckerSvp Cpo | Sell | 1,11333,237 held (−3%) | $25.87 | $29K | -0.2% | — |
| Mar 11SEC | Marcus BeckerSvp Cpo | Buy | 14,59234,350 held (+74%) | — | $0 | — | — |
| Mar 11SEC | Philippe HoffmannPresident | Buy | 71,132186,848 held (+61%) | — | $0 | — | — |
| Mar 11SEC | Stephane CorrePresident | Buy | 8,02666,520 held (+14%) | — | $0 | — | — |
| Mar 6SEC | Philippe HoffmannPresident | Sell | 50,00085,425 held (−37%) | $26.03 | $1.3M | -0.8% | — |
| Mar 6SEC | Philippe HoffmannPresident | Sell | 30,00055,425 held (−35%) | $27.14 | $814K | -4.9% | — |
| Mar 3SEC | Stephane CorrePresident | Sell | 3,00044,444 held (−6%) | $24.69 | $74K | +4.5% | — |
| Feb 27SEC | Isabelle Boccon-gibodDirector | Sell | 10,00023,000 held (−30%) | $25.77 | $258K | +0.2% | — |
| Feb 27SEC | Stephane CorrePresident | Sell | 3,20047,444 held (−6%) | $25.71 | $82K | +0.4% | — |
| Feb 24SEC | Marcus BeckerSvp Cpo | Sell | 15,570 | $25.58 | $398K | +0.9% | — |
| Feb 24SEC | Stephen Charles WaltersSvp Gc & Secretary | Sell | 1,500 | $25.39 | $38K | +1.7% | — |
Insiders at CONSTELLIUM SE
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Philippe HoffmannPresident | — | $3.8M | May 5, 2026 | — |
| Philip Ryan JurkovicSvp & Chro | — | $2.3M | May 4, 2026 | — |
| Jack Q. GuoCFO | — | $1.9M | May 7, 2026 | — |
| Nicolas BrunSvp Pa, Comm & Sust | — | $1.3M | May 12, 2026 | — |
| Marcus BeckerSvp Cpo | — | $1.0M | Jun 1, 2026 | — |
| Stephane CorrePresident | — | $523K | May 12, 2026 | — |
| Jean-christophe DeslarzesDirector | $123K | — | Aug 3, 2026 | 59 |
| Michiel BrandjesDirector | — | $325K | May 7, 2026 | — |
| John OrmerodDirector | — | $280K | Jun 8, 2026 | — |
| Isabelle Boccon-gibodDirector | — | $258K | Feb 27, 2026 | — |
| Bradley Lee SoultzDirector | $85K | — | May 18, 2026 | — |
| Martin JarrettSvp Chief Innovation Officer | — | $158K | May 18, 2026 | — |
| Ingrid JoergCEO | — | $119K | Mar 11, 2026 | — |
| Stephen Charles WaltersSvp Gc & Secretary | — | $38K | Feb 24, 2026 | — |
| Ludovic PiquierCTO | — | $34K | May 13, 2026 | — |
CSTM stock: common questions
Are CONSTELLIUM SE insiders buying CSTM stock?
In the past 12 months, 2 insiders reported open-market purchases of CSTM worth $208K. The latest was Director Jean-christophe Deslarzes bought $41K of CSTM at $27.24.
Are CONSTELLIUM SE insiders selling CSTM stock?
13 insiders reported sales worth $12.2M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is CSTM's 52-week range?
Over the past year CSTM has traded between $14.41 and $36.15. It last closed at $25.81 on Oct 9, 2026.