16 insiders reported 85 Form 4 transactions for CENTURY ALUMINUM CO (CENX) over the past 18 months (most recent 2026-06-17). Recent activity: Berntzen Jarl (Director) Buy 2,172 shares, Michelmore Andrew G (Director) Buy 2,172 shares, GLASSER ERROL (Director) Buy 2,172 shares, Bush Jennifer Mary (Director) Buy 2,172 shares, Olivier Tamla A (Director) Buy 2,172 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-17 | Berntzen Jarl | Director | Buy | 2,172 | $0 |
| 2026-06-17 | Michelmore Andrew G | Director | Buy | 2,172 | $0 |
| 2026-06-17 | GLASSER ERROL | Director | Buy | 2,172 | $0 |
| 2026-06-17 | Bush Jennifer Mary | Director | Buy | 2,172 | $0 |
| 2026-06-17 | Olivier Tamla A | Director | Buy | 2,172 | $0 |
| 2026-06-17 | Michelmore Andrew G | Director | Sell | 652 | $35,567 |
| 2026-03-27 | Trpkovski Peter A | EVP, CFO | Sell | 16,739 | $845,487 |
| 2026-03-17 | Gary Jesse E | President and CEO | Sell | 150,000 | $8.3M |
| 2026-03-13 | Hoffman Robert F | SVP, IT and CAO | Sell | 10,529 | $594,994 |
| 2026-03-13 | Calloway Kenneth L | SVP, Human Resources | Sell | 18,000 | $1.0M |
| 2026-03-06 | Hoffman Robert F | SVP, IT and CAO | Sell | 10,000 | $563,300 |
| 2026-03-04 | Glencore AG | Insider | Sell | 6.3M | $326.8M |
| 2026-03-04 | GLENCORE INTERNATIONAL AG | Insider | Sell | 6.3M | $326.8M |
| 2026-03-04 | Glencore plc | Insider | Sell | 6.3M | $326.8M |
| 2026-03-04 | Aboud Matt | SVP, Strategy & Business Dev't | Sell | 12,126 | $636,615 |
| 2026-03-04 | Aboud Matt | SVP, Strategy & Business Dev't | Sell | 2,971 | $156,483 |
| 2026-03-03 | Hafberg Agust F | SVP & Chief Commercial Officer | Sell | 22,884 | $1.2M |
| 2026-02-27 | Gudlaugsson Gunnar | EVP - Global Operations | Sell | 43,000 | $2.3M |
| 2026-02-25 | DeZee John | EVP, GC and Secretary | Sell | 66,000 | $3.3M |
| 2026-02-11 | Trpkovski Peter A | EVP, CFO | Sell | 4,240 | $230,486 |
| 2026-01-23 | Gary Jesse E | President and CEO | Sell | 314,611 | $0 |
| 2026-01-23 | Gary Jesse E | President and CEO | Buy | 314,611 | $0 |
| 2026-01-23 | Gary Jesse E | President and CEO | Sell | 150,000 | $7.2M |
| 2026-01-05 | Hafberg Agust F | SVP & Chief Commercial Officer | Buy | 30,878 | $0 |
| 2026-01-05 | Hafberg Agust F | SVP & Chief Commercial Officer | Sell | 15,622 | $612,070 |
Source: SEC Form 4 filings · as of 2026-06-17