Century Aluminum Company (CENX) has 20 known insider and institutional holders on record. The largest holder is GLENCORE INVESTMENT PTY LTD. with 28,038,839 shares. Other notable holders include Givolon Ltd and GLENCORE INTERNATIONAL AG.
Over the last 12 months, insiders have made 41 transactions in CENX stock — 12 buys (valued at RSU Award) and 15 sells (valued at $354.05M). Insider selling has exceeded buying during this period.
CENX Insider Ownership
Top Holder
GLENCORE INVESTMENT PTY LTD.
28,038,839 shares
Buys (12 mo)
12
$0.00 value
Sells (12 mo)
15
$354.05M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Glencore Investment Pty Ltd. |
Director |
28,038,839 |
2009-04-02 |
|
| 2 |
Givolon Ltd |
Director |
27,500,000 |
2017-09-15 |
|
| 3 |
Glencore International Ag |
10 Percent Owner |
12,184,755 |
2026-03-04 |
|
| 4 |
Glencore Plc |
Director |
11,701,321 |
2022-10-03 |
|
| 5 |
Bless Michael A |
President and CEO |
353,989 |
2021-03-05 |
|
| 6 |
Kruger Logan W |
CEO and President |
211,148 |
2011-03-24 |
|
| 7 |
Berntzen Jarl |
Director |
208,951 |
2025-06-18 |
|
| 8 |
Hoerner John E. |
EVP - N. American Operations |
156,392 |
2021-01-05 |
|
| 9 |
Kjos David |
VP Maj Proj. Tech. & Sustain |
153,222 |
2013-03-26 |
|
| 10 |
Gary Jesse E |
President and CEO |
142,580 |
2026-03-17 |
|
| 11 |
Gudlaugsson Gunnar |
EVP - Global Operations |
136,393 |
2026-02-27 |
|
| 12 |
Glasser Errol |
Director |
118,697 |
2025-06-18 |
|
| 13 |
Conti Craig C |
EVP & Chief Financial Officer |
117,018 |
2022-03-01 |
|
| 14 |
Hale Wayne |
EVP COO |
113,564 |
2011-03-24 |
|
| 15 |
Bialek Gerald C |
Chief Financial Officer |
100,620 |
2025-01-03 |
|
| 16 |
Dezee John |
EVP, Gc and Secretary |
97,647 |
2026-02-25 |
|
| 17 |
Michelmore Andrew G |
Director |
89,089 |
2025-06-18 |
|
| 18 |
Aboud Matt |
SVP, Strategy & Business Dev't |
67,814 |
2026-03-04 |
|
| 19 |
Wilkinson Terence |
Director |
67,660 |
2018-06-20 |
|
| 20 |
Harrison Michelle |
Sr. VP Finance & Treasurer |
67,383 |
2023-01-04 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-25 |
Trpkovski Peter A |
EVP, CFO |
Informative Sell |
16,739 |
$50.51 |
$845.49K |
| 2026-03-16 |
Gary Jesse E |
President and CEO |
Informative Sell |
150,000 |
$55.47 |
$8.32M |
| 2026-03-12 |
Calloway Kenneth L |
SVP, Human Resources |
Informative Sell |
18,000 |
$58.00 |
$1.04M |
| 2026-03-11 |
Hoffman Robert F |
SVP, IT and CAO |
Informative Sell |
10,529 |
$56.51 |
$594.99K |
| 2026-03-04 |
Hoffman Robert F |
SVP, IT and CAO |
Informative Sell |
10,000 |
$56.33 |
$563.3K |
| 2026-03-03 |
Aboud Matt |
SVP, Strategy & Business Dev't |
Informative Sell |
2,971 |
$52.67 |
$156.48K |
| 2026-03-02 |
Aboud Matt |
SVP, Strategy & Business Dev't |
Informative Sell |
12,126 |
$52.50 |
$636.62K |
| 2026-03-04 |
Glencore International Ag |
10 Percent Owner |
Informative Sell |
6,315,245 |
$51.75 |
$326.81M |
| 2026-02-27 |
Hafberg Agust F |
SVP & Chief Commercial Officer |
Informative Sell |
22,884 |
$51.24 |
$1.17M |
| 2026-02-25 |
Gudlaugsson Gunnar |
EVP - Global Operations |
Informative Sell |
43,000 |
$54.10 |
$2.33M |
| 2026-02-23 |
Dezee John |
EVP, Gc and Secretary |
Informative Sell |
66,000 |
$50.72 |
$3.35M |
| 2026-02-09 |
Trpkovski Peter A |
EVP, CFO |
Tax Withholding of RSU |
4,240 |
$54.36 |
$230.49K |
| 2026-01-23 |
Gary Jesse E |
President and CEO |
Informative Sell |
150,000 |
$48.19 |
$7.23M |
| 2026-01-12 |
Gary Jesse E |
President and CEO |
Gift (Given) |
314,611 |
- |
- |
| 2026-01-01 |
Hafberg Agust F |
SVP & Chief Commercial Officer |
RSU Award |
5,238 |
- |
- |
| 2025-12-31 |
Hafberg Agust F |
SVP & Chief Commercial Officer |
Tax Withholding of RSU |
7,811 |
$39.18 |
$306.03K |
| 2026-01-01 |
Calloway Kenneth L |
SVP, Human Resources |
RSU Award |
5,238 |
- |
- |
| 2025-12-31 |
Calloway Kenneth L |
SVP, Human Resources |
Tax Withholding of RSU |
3,723 |
$39.18 |
$145.87K |
| 2026-01-01 |
Trpkovski Peter A |
EVP, CFO and Treasurer |
RSU Award |
13,488 |
- |
- |
| 2025-12-31 |
Trpkovski Peter A |
EVP, CFO and Treasurer |
Tax Withholding of RSU |
4,045 |
$39.18 |
$158.48K |
| 2026-01-01 |
Aboud Matt |
SVP, Strategy & Business Dev't |
RSU Award |
5,529 |
- |
- |
| 2025-12-31 |
Aboud Matt |
SVP, Strategy & Business Dev't |
Tax Withholding of RSU |
8,243 |
$39.18 |
$322.96K |
| 2026-01-01 |
Dezee John |
EVP, Gc and Secretary |
RSU Award |
9,821 |
- |
- |
| 2025-12-31 |
Dezee John |
EVP, Gc and Secretary |
Tax Withholding of RSU |
11,971 |
$39.18 |
$469.02K |
| 2026-01-01 |
Gudlaugsson Gunnar |
EVP - Global Operations |
RSU Award |
15,624 |
- |
- |
