CENX (Century Aluminum Co)
Insider Trading Activity
Every open-market purchase and sale reported by CENX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-17 | Jennifer Mary Bush | Director | A | — | — |
| 2026-06-17 | Jarl Berntzen | Director | A | — | — |
| 2026-06-17 | ERROL GLASSER | Director | A | — | — |
| 2026-06-17 | Andrew G Michelmore | Director | MIXED | — | — |
| 2026-06-17 | Tamla A Olivier | Director | A | — | — |
| 2026-03-27 | Peter A Trpkovski | EVP, CFO | Sell | — | — |
| 2026-03-17 | Jesse E Gary | President and CEO | Sell | — | — |
| 2026-03-13 | Kenneth L Calloway | SVP, Human Resources | Sell | — | — |
| 2026-03-13 | Robert F Hoffman | SVP, IT and CAO | Sell | — | — |
| 2026-03-06 | Robert F Hoffman | SVP, IT and CAO | Sell | — | — |
| 2026-03-04 | Matt Aboud | SVP, Strategy & Business Dev't | Sell | — | — |
| 2026-03-04 | Glencore AG | 10%+ Owner | Sell | — | — |
| 2026-03-03 | Agust F Hafberg | SVP & Chief Commercial Officer | Sell | — | — |
| 2026-02-27 | Gunnar Gudlaugsson | EVP - Global Operations | Sell | — | — |
| 2026-02-25 | John DeZee | EVP, GC and Secretary | Sell | — | — |
| 2026-02-11 | Peter A Trpkovski | EVP, CFO | F | — | — |
| 2026-01-23 | Jesse E Gary | President and CEO | MIXED | — | — |
| 2026-01-05 | Gunnar Gudlaugsson | EVP - Global Operations | MIXED | — | — |
| 2026-01-05 | Peter A Trpkovski | EVP, CFO and Treasurer | MIXED | — | — |
| 2026-01-05 | John DeZee | EVP, GC and Secretary | MIXED | — | — |
| 2026-01-05 | Jesse E Gary | President and CEO | MIXED | — | — |
| 2026-01-05 | Matt Aboud | SVP, Strategy & Business Dev't | MIXED | — | — |
| 2026-01-05 | Agust F Hafberg | SVP & Chief Commercial Officer | MIXED | — | — |
| 2026-01-05 | Robert F Hoffman | SVP, IT and CAO | MIXED | — | — |
| 2026-01-05 | Kenneth L Calloway | SVP, Human Resources | MIXED | — | — |
| 2025-11-13 | Glencore plc | 10%+ Owner | MIXED | — | — |
| 2025-10-02 | Glencore AG | 10%+ Owner | C | — | — |
| 2025-09-30 | Agust F Hafberg | SVP & Chief Commercial Officer | Sell | — | — |
| 2025-09-23 | Kenneth L Calloway | SVP, Human Resources | Sell | — | — |
| 2025-08-14 | Matt Aboud | SVP, Strategy & Business Dev't | Sell | — | — |
| 2025-07-02 | Glencore plc | 10%+ Owner | C | — | — |
| 2025-06-18 | ERROL GLASSER | Director | A | — | — |
| 2025-06-18 | Tamla A Olivier | Director | A | — | — |
| 2025-06-18 | Jennifer Mary Bush | Director | A | — | — |
| 2025-06-18 | Jarl Berntzen | Director | A | — | — |
| 2025-06-18 | Andrew G Michelmore | Director | MIXED | — | — |
| 2025-04-01 | Glencore plc | 10%+ Owner | C | — | — |
| 2025-03-25 | Peter A Trpkovski | EVP, CFO and Treasurer | A | — | — |
| 2025-03-24 | Robert F Hoffman | SVP, IT and CAO | Sell | — | — |
| 2025-03-18 | Robert F Hoffman | SVP, IT and CAO | Sell | — | — |
| 2025-02-10 | Peter A Trpkovski | SVP, Finance and Treasurer | F | — | — |
| 2025-01-29 | Jesse E Gary | President and CEO | G | — | — |
| 2025-01-03 | Gerald C Bialek | Chief Financial Officer | A | — | — |
| 2025-01-03 | Agust F Hafberg | SVP & Chief Commercial Officer | MIXED | — | — |
| 2025-01-03 | John DeZee | EVP, GC and Secretary | MIXED | — | — |
| 2025-01-03 | Robert F Hoffman | SVP, IT and CAO | MIXED | — | — |
| 2025-01-03 | Peter A Trpkovski | SVP, Finance and Treasurer | MIXED | — | — |
| 2025-01-03 | Gunnar Gudlaugsson | EVP - Global Operations | MIXED | — | — |
| 2025-01-03 | Kenneth L Calloway | SVP, Human Resources | MIXED | — | — |
| 2025-01-03 | Matt Aboud | SVP, Strategy & Business Dev't | MIXED | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 40,034,438 | — |
| — | 10%+ Owner | 36,249,151 | — |
| — | 10%+ Owner | 36,005,947 | — |
| — | 10%+ Owner | 24,742,111 | — |
| — | President and CEO | 419,807 | — |
| — | President and CEO | 353,989 | — |
| — | CEO and President | 211,372 | — |
| — | Director | 211,123 | — |
| — | EVP - N. American Operations | 194,125 | — |
| — | VP Maj Proj. Tech. & Sustain | 154,090 | — |
| — | EVP - Global Operations | 136,393 | — |
| — | Director | 120,869 | — |
| — | EVP & Chief Financial Officer | 117,018 | — |
| — | EVP COO | 113,716 | — |
| — | Chief Financial Officer | 100,620 | — |
| — | EVP, GC and Secretary | 97,647 | — |
| — | Director | 90,609 | — |
| — | Sr. VP Finance & Treasurer | 72,226 | — |
| — | Director | 71,243 | — |
| — | Director | 67,660 | — |
| — | SVP, Strategy & Business Dev't | 64,843 | — |
| — | Director | 64,259 | — |
| — | EVP, CFO | 64,125 | — |
| — | SVP, IT and CAO | 56,657 | — |
| — | EVP & Chief Financial Officer | 52,253 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the CENX quote page; the site-wide leaderboard is on the insider transactions hub.