As of April 17, 2026, the three largest insider holders of CSTM are Ingrid Joerg (Ceo, 409.45K shares), Ludovic Piquier (Svp Manuf Excellence Cto, 242.71K shares), Philip Ryan Jurkovic (Svp Chro, 220.93K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Ingrid Joerg | Ceo | 409,448 | 0 | 16 Mar, 2026 |
| Ludovic Piquier | Svp Manuf Excellence Cto | 242,713 | 0 | 16 Mar, 2026 |
| Philip Ryan Jurkovic | Svp Chro | 220,933 | 0 | 16 Mar, 2026 |
| Jack Q. Guo | Evp Cfo | 210,569 | 0 | 16 Mar, 2026 |
| Philippe Hoffmann | President, At | 194,153 | 0 | 16 Mar, 2026 |
| Nicolas Brun | Svp Pa, Comm Sust | 131,552 | 0 | 16 Mar, 2026 |
| Stephane Corre | President, Asi | 72,313 | 0 | 16 Mar, 2026 |
| Jean-Christophe Deslarzes | - | 40,700 | 0 | 17 Mar, 2026 |
| Niklaus Schild | Svp Cio Cdo | 38,703 | 0 | 16 Mar, 2026 |
| Matthew B. Perkins | President, Parp | 33,212 | 0 | 16 Mar, 2026 |
| Marcus Becker | Svp Cpo | 27,175 | 0 | 17 Mar, 2026 |
| Stephen Charles Walters | Svp Gc Secretary | 25,068 | 0 | 16 Mar, 2026 |
| Isabelle Boccon-Gibod | - | 23,000 | 0 | 27 Feb, 2026 |
| Wiebke Weiler | - | 625 | 0 | 16 Mar, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 02 Mar, 2026 | Jean-Christophe Deslarzes | Ordinary shares | A | 1,665 | $24.77 | 40,700 | D | P |
| 16 Mar, 2026 | Marcus Becker | Ordinary shares | D | 10,000 | $25.09 | 27,175 | D | S |
| 12 Mar, 2026 | Matthew B. Perkins | Ordinary shares | A | 10,210 | $0.00 | 33,212 | D | A |
| 12 Mar, 2026 | Stephane Corre | Ordinary shares | A | 7,293 | $0.00 | 72,313 | D | A |
| 12 Mar, 2026 | Niklaus Schild | Ordinary shares | A | 3,355 | $0.00 | 38,703 | D | A |
| 12 Mar, 2026 | Philippe Hoffmann | Ordinary shares | A | 12,033 | $0.00 | 194,153 | D | A |
| 12 Mar, 2026 | Stephen Charles Walters | Ordinary shares | A | 5,834 | $0.00 | 25,068 | D | A |
| 12 Mar, 2026 | Nicolas Brun | Ordinary shares | A | 4,376 | $0.00 | 131,552 | D | A |
| 12 Mar, 2026 | Jack Q. Guo | Ordinary shares | A | 19,690 | $0.00 | 210,569 | D | A |
| 12 Mar, 2026 | Ludovic Piquier | Ordinary shares | A | 5,469 | $0.00 | 242,713 | D | A |
| 12 Mar, 2026 | Marcus Becker | Ordinary shares | A | 3,938 | $0.00 | 37,175 | D | A |
| 12 Mar, 2026 | Ingrid Joerg | Ordinary shares | A | 31,358 | $0.00 | 409,448 | D | A |
| 12 Mar, 2026 | Philip Ryan Jurkovic | Ordinary shares | A | 10,210 | $0.00 | 220,933 | D | A |
| 12 Mar, 2026 | Wiebke Weiler | Ordinary shares | A | 625 | $0.00 | 625 | D | A |
| 10 Mar, 2026 | Stephane Corre | Ordinary shares | D | 1,500 | $25.89 | 65,020 | D | S |
| 09 Mar, 2026 | Ingrid Joerg | Ordinary shares | A | 71,132 | $0.00 | 382,704 | D | A |
| 09 Mar, 2026 | Jack Q. Guo | Ordinary shares | A | 75,874 | $0.00 | 232,596 | D | A |
| 09 Mar, 2026 | Stephane Corre | Ordinary shares | A | 8,026 | $0.00 | 66,520 | D | P |
| 09 Mar, 2026 | Ludovic Piquier | Ordinary shares | A | 30,350 | $0.00 | 237,244 | D | A |
| 09 Mar, 2026 | Niklaus Schild | Ordinary shares | A | 5,106 | $0.00 | 35,348 | D | A |