Constellium SE (CSTM) Insider Trading
Over the last 3 months, CSTM insiders made 1 open-market buy and 1 sale, a net sale of -$239K (SEC Form 4). Over the last 6 months, 263 institutions increased and 197 reduced their position (13F).
Insider Activity
Sentiment
13/100
Buys (3m)
1
Sells (3m)
1
Net (3m)
-$239.5K
Insiders buying
Insider trades by month Buys Sells
Feb
Mar
May
Jun
Aug
Context3-month price -24.6%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 3, 2026 | Deslarzes Jean-Christophedirector | Buy | 1,490 | $27.24 |
| Jul 13, 2026 | Joerg Ingriddirector, officer: CEO | Tax | 2,984 | $29.28 |
| Jun 8, 2026 | Ormerod Johndirector | Sell | 8,000 | $35.01 |
| Jun 1, 2026 | Becker Marcusofficer: SVP CPO | Sell | 10,391 | $34.93 |
| May 18, 2026 | Jarrett Martinofficer: SVP Chief Innovation Officer | Sell | 4,716 | $33.46 |
| May 18, 2026 | Soultz Bradley Leedirector | Buy | 2,500 | $33.84 |
| May 13, 2026 | Piquier Ludovicofficer: SVP Manuf Excellence & CTO | Sell | 1,000 | $33.57 |
| May 12, 2026 | Corre Stephaneofficer: President, AS&I | Sell | 5,000 | $33.52 |
| May 12, 2026 | Brun Nicolasofficer: SVP PA, Comm & Sust | Sell | 26,661 | $33.85 |
| May 7, 2026 | Brandjes Michieldirector | Sell | 10,400 | $31.25 |
| May 7, 2026 | Guo Jack Q.officer: EVP & CFO | Sell | 25,201 | $32.62 |
| May 5, 2026 | Hoffmann Philippeofficer: President, A&T | Sell | 50,000 | $31.92 |
| May 4, 2026 | Jurkovic Philip Ryanofficer: SVP & CHRO | Sell | 48,784 | $32.01 |
| May 4, 2026 | Corre Stephaneofficer: President, AS&I | Sell | 5,000 | $32.04 |
| May 1, 2026 | Deslarzes Jean-Christophedirector | Buy | 1,325 | $31.13 |
| Mar 17, 2026 | Deslarzes Jean-Christophedirector | Buy | 1,665 | $24.77 |
| Mar 17, 2026 | Becker Marcusofficer: SVP CPO | Sell | 10,000 | $25.09 |
| Mar 16, 2026 | Hoffmann Philippeofficer: President, A&T | Grant | 12,033 | — |
| Mar 16, 2026 | Walters Stephen Charlesofficer: SVP GC & Secretary | Grant | 5,834 | — |
| Mar 16, 2026 | Weiler Wiebkedirector | Grant | 625 | — |
| Mar 16, 2026 | Brun Nicolasofficer: SVP PA, Comm & Sust | Grant | 4,376 | — |
| Mar 16, 2026 | Jurkovic Philip Ryanofficer: SVP & CHRO | Grant | 10,210 | — |
| Mar 16, 2026 | Piquier Ludovicofficer: SVP Manuf Excellence & CTO | Grant | 5,469 | — |
| Mar 16, 2026 | Becker Marcusofficer: SVP CPO | Grant | 3,938 | — |
| Mar 16, 2026 | Joerg Ingriddirector, officer: CEO | Grant | 31,358 | — |
| Mar 16, 2026 | Perkins Matthew B.officer: President, P&ARP | Grant | 10,210 | — |
| Mar 16, 2026 | Schild Niklausofficer: SVP CIO & CDO | Grant | 3,355 | — |
| Mar 16, 2026 | Corre Stephaneofficer: President, AS&I | Grant | 7,293 | — |
| Mar 16, 2026 | Guo Jack Q.officer: EVP & CFO | Grant | 19,690 | — |
| Mar 12, 2026 | Corre Stephaneofficer: President, AS&I | Sell | 1,500 | $25.89 |
Source: CSTM SEC Form 4 filings, latest Aug 3, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their CSTM positions over the last 6 months (SEC Form 13F).
Increased
263
New positions
198
Reduced
197
Sold out
30
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Reduced | 13.0M | May 13, 2026 |
| BlackRock, Inc. | Reduced | 12.8M | Aug 7, 2026 |
| BPIFRANCE SA | Unchanged | 12.6M | Apr 28, 2026 |
| Bpifrance SA | Reduced | 8.4M | Jul 27, 2026 |
| FMR LLC | Reduced | 7.0M | May 15, 2026 |
| MORGAN STANLEY | Increased | 6.2M | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 4.4M | Aug 13, 2026 |
| AMERICAN CENTURY COMPANIES INC | Increased | 4.2M | Aug 12, 2026 |
| T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | Reduced | 4.0M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 3.9M | May 8, 2026 |
| MILLENNIUM MANAGEMENT LLC | Reduced | 3.5M | May 15, 2026 |
| D. E. SHAW & CO., INC. | Increased | 3.2M | May 15, 2026 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 3.2M | May 14, 2026 |
| MORGAN STANLEY | Reduced | 3.2M | May 15, 2026 |
| T. Rowe Price Investment Management, Inc. | Reduced | 3.0M | Aug 14, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.