CSTM Insider Trading
SEC Form 4 transaction history for CSTM. Filings have up to a 2 business day reporting delay.
Over the last 90 days, CSTM insiders reported 2 open-market buys ($125K) against 6 sells ($1.9M), so the dollar flow leans toward selling. The full filing history below includes grants and exercises for context. Latest filing: Deslarzes Jean-Christophe on 2026-08-03.
Transaction History
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-08-03 | Deslarzes Jean-Christophe | - | Buy | 1.5K | $27.24 | $41K |
| 2026-07-10 | Joerg Ingrid | CEO | Tax withholding | 3.0K | $29.28 | $87K |
| 2026-06-04 | Ormerod John | - | Sell | 8.0K | $35.01 | $280K |
| 2026-05-28 | Becker Marcus | SVP CPO | Sell | 10.4K | $34.93 | $363K |
| 2026-05-14 | Soultz Bradley Lee | - | Buy | 2.5K | $33.84 | $85K |
| 2026-05-14 | Jarrett Martin | SVP Chief Innovation Officer | Sell | 4.7K | $33.46 | $158K |
| 2026-05-12 | Piquier Ludovic | SVP Manuf Excellence & CTO | Sell | 1.0K | $33.57 | $34K |
| 2026-05-11 | Brun Nicolas | SVP PA, Comm & Sust | Sell | 26.7K | $33.85 | $902K |
| 2026-05-08 | Corre Stephane | President, AS&I | Sell | 5.0K | $33.52 | $168K |
| 2026-05-05 | Guo Jack Q. | EVP & CFO | Sell | 25.2K | $32.62 | $822K |
| 2026-05-05 | Brandjes Michiel | - | Sell | 10.4K | $31.25 | $325K |
| 2026-05-01 | Corre Stephane | President, AS&I | Sell | 5.0K | $32.04 | $160K |
| 2026-05-01 | Hoffmann Philippe | President, A&T | Sell | 50.0K | $31.92 | $1.6M |
| 2026-05-01 | Deslarzes Jean-Christophe | - | Buy | 1.3K | $31.13 | $41K |
| 2026-05-01 | Jurkovic Philip Ryan | SVP & CHRO | Sell | 48.8K | $32.01 | $1.6M |
| 2026-03-16 | Becker Marcus | SVP CPO | Sell | 10.0K | $25.09 | $251K |
| 2026-03-12 | Schild Niklaus | SVP CIO & CDO | Grant | 3.4K | $0.00 | $0 |
| 2026-03-12 | Becker Marcus | SVP CPO | Grant | 3.9K | $0.00 | $0 |
| 2026-03-12 | Brun Nicolas | SVP PA, Comm & Sust | Grant | 4.4K | $0.00 | $0 |
| 2026-03-12 | Guo Jack Q. | EVP & CFO | Grant | 19.7K | $0.00 | $0 |
| 2026-03-12 | Corre Stephane | President, AS&I | Grant | 7.3K | $0.00 | $0 |
| 2026-03-12 | Hoffmann Philippe | President, A&T | Grant | 12.0K | $0.00 | $0 |
| 2026-03-12 | Perkins Matthew B. | President, P&ARP | Grant | 10.2K | $0.00 | $0 |
| 2026-03-12 | Joerg Ingrid | CEO | Grant | 31.4K | $0.00 | $0 |
| 2026-03-12 | Piquier Ludovic | SVP Manuf Excellence & CTO | Grant | 5.5K | $0.00 | $0 |
| 2026-03-12 | Jurkovic Philip Ryan | SVP & CHRO | Grant | 10.2K | $0.00 | $0 |
| 2026-03-12 | Weiler Wiebke | - | Grant | 625 | $0.00 | $0 |
| 2026-03-12 | Walters Stephen Charles | SVP GC & Secretary | Grant | 5.8K | $0.00 | $0 |
| 2026-03-10 | Jurkovic Philip Ryan | SVP & CHRO | Sell | 29.9K | $25.87 | $774K |
| 2026-03-10 | Hoffmann Philippe | President, A&T | Sell | 4.7K | $25.87 | $122K |
| 2026-03-10 | Becker Marcus | SVP CPO | Sell | 1.1K | $25.87 | $29K |
| 2026-03-10 | Joerg Ingrid | CEO | Sell | 4.6K | $25.87 | $119K |
| 2026-03-10 | Guo Jack Q. | EVP & CFO | Sell | 41.7K | $25.87 | $1.1M |
| 2026-03-10 | Corre Stephane | President, AS&I | Sell | 1.5K | $25.89 | $39K |
| 2026-03-09 | Guo Jack Q. | EVP & CFO | Grant | 75.9K | $0.00 | $0 |
| 2026-03-09 | Hoffmann Philippe | President, A&T | Buy | 71.1K | $0.00 | $0 |
| 2026-03-09 | Joerg Ingrid | CEO | Grant | 71.1K | $0.00 | $0 |
| 2026-03-09 | Corre Stephane | President, AS&I | Buy | 8.0K | $0.00 | $0 |
| 2026-03-09 | Becker Marcus | SVP CPO | Buy | 14.6K | $0.00 | $0 |
| 2026-03-09 | Brun Nicolas | SVP PA, Comm & Sust | Sell | 17.7K | $24.67 | $437K |
| 2026-03-09 | Brun Nicolas | SVP PA, Comm & Sust | Grant | 23.7K | $0.00 | $0 |
| 2026-03-09 | Schild Niklaus | SVP CIO & CDO | Grant | 5.1K | $0.00 | $0 |
| 2026-03-09 | Piquier Ludovic | SVP Manuf Excellence & CTO | Grant | 30.4K | $0.00 | $0 |
| 2026-03-09 | Jurkovic Philip Ryan | SVP & CHRO | Grant | 59.3K | $0.00 | $0 |
| 2026-03-04 | Hoffmann Philippe | President, A&T | Sell | 50.0K | $26.03 | $1.3M |
| 2026-03-04 | Hoffmann Philippe | President, A&T | Sell | 30.0K | $27.14 | $814K |
| 2026-03-02 | Deslarzes Jean-Christophe | - | Buy | 1.7K | $24.77 | $41K |
| 2026-02-27 | Corre Stephane | President, AS&I | Sell | 3.0K | $24.69 | $74K |
| 2026-02-26 | Boccon-Gibod Isabelle | - | Sell | 10.0K | $25.77 | $258K |
| 2026-02-25 | Corre Stephane | President, AS&I | Sell | 3.2K | $25.71 | $82K |
| 2026-02-23 | Walters Stephen Charles | SVP GC & Secretary | Sell | 1.5K | $25.39 | $38K |
| 2026-02-20 | Becker Marcus | SVP CPO | Sell | 15.6K | $25.58 | $398K |
Understanding
Interpreting CSTM insider filings
Officers, directors, and 10% owners of CSTM must report every trade in their own stock to the SEC within two business days on Form 4. We parse each filing as it lands on EDGAR, so this page is the same primary-source record professionals read, minus the paywall.
The asymmetry that makes this data useful: insiders sell for dozens of innocent reasons (taxes, diversification, a house), but they voluntarily buy on the open market for exactly one reason. That is why buys are headlined and one-off sells deserve little weight.
The strongest historical pattern is the cluster: several different insiders buying within days of each other. A lone director's small buy is noise; the CFO and two directors buying the same week is a documented anomaly worth your attention.
Frequently Asked Questions
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Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.