Constellium SE (CSTM)
NYSE: CSTM · Secondary Smelting & Refining of Nonferrous Metals · Paris, FR · filing with the SEC since 2012
Who owns Constellium SE
As filed with the SECHolders of 5% or more
2
Caisse des Depots (CDC) holds 6.2% of Ordinary Shares, nominal value EUR0.02 per share, as its SCHEDULE 13D/A filed May 28, 2026 says.
Directors and officers
23
report now, of 23 people on the record since 2026. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Caisse des Depots (CDC)
SCHEDULE 13D/A · filed May 28, 2026 · Ordinary Shares, nominal value EUR0.02 per share
Blackrock, Inc.
SCHEDULE 13G · filed Jul 17, 2025 · Common Stock · 5% in Apr 29, 2025
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 29, 2025 · Class A Stock · reported falling below 5%
T. Rowe Price Investment Management, Inc.
SCHEDULE 13G/A · filed Sep 8, 2025 · COMMON STOCK · reported falling below 5%, from 10% in Aug 14, 2025
Millennium Management LLC
SCHEDULE 13G/A · filed Apr 24, 2026 · Ordinary Shares · reported falling below 5%, from 5.3% in Sep 16, 2025
Fmr LLC
SCHEDULE 13G/A · filed Aug 6, 2026 · COMMON STOCK · reported falling below 5%, from 5.1% in May 6, 2026
What CSTM reports owning in othersstakes of 5% or more, and other ties
41 subsidiaries in 12 countries, from the list filed with the 10-K filed Feb 25, 2026.
Insider tradesForm 4
26sales
8purchases
0sales on a scheduled plan
13people selling
$12.2Msold, in dollars
$200,000bought, in dollars
Open-market trades on Form 4 from Nov 3, 2025 to Nov 3, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 3, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window15 of 23 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Hoffmann Philippe | President, A&T | 4 | $3.8M | 0 | 1 | $0 |
| Jurkovic Philip Ryan | SVP & CHRO | 2 | $2.3M | 0 | 0 | $0 |
| Guo Jack Q. | EVP & CFO | 2 | $1.9M | 0 | 0 | $0 |
| Brun Nicolas | SVP PA, Comm & Sust | 2 | $1.3M | 0 | 0 | $0 |
| Becker Marcus | SVP CPO | 4 | $1.0M | 0 | 1 | $0 |
| Corre Stephane | President, AS&I | 5 | $500,000 | 0 | 1 | $0 |
| Ormerod John | director | 1 | $300,000 | 0 | 0 | $0 |
| Brandjes Michiel | director | 1 | $300,000 | 0 | 0 | $0 |
| Boccon-Gibod Isabelle | director | 1 | $300,000 | 0 | 0 | $0 |
| Jarrett Martin | SVP Chief Innovation Officer | 1 | $200,000 | 0 | 0 | $0 |
| Joerg Ingrid | CEO | 1 | $100,000 | 0 | 0 | $0 |
| Deslarzes Jean-Christophe | director | 0 | $0 | 0 | 4 | $200,000 |
| Soultz Bradley Lee | director | 0 | $0 | 0 | 1 | $100,000 |
| Piquier Ludovic | SVP Manuf Excellence & CTO | 1 | $0 | 0 | 0 | $0 |
| Walters Stephen Charles | SVP GC & Secretary | 1 | $0 | 0 | 0 | $0 |