March 16, 2026 · Form 4 insider transaction
Gary Jesse E sold 150,000 shares of Century Aluminum Co at $55.47 per share, a transaction worth $8.32M. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 1 day after the transaction.
The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 20, 2025 (the 'Trading Plan'). There are no additional shares available for sale under the Trading Plan and, as such, the Trading Plan is now complete.; The price reported above reflects the weighted average sale price for the shares which were sold in multiple transactions at prices ranging from $54.08 to $56.80, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the specific number of shares and prices at which the transactions were effected.; Shares held in a self-settled, revocable trust for which the Reporting Person serves as trustee.