Insider Transactions Reported by 20 Insiders of CENTURY ALUMINUM CO

Symbol
CENX on Nasdaq
Location
Chicago, IL

Insiders trading volume in the past year

CENTURY ALUMINUM CO executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
GLENCORE INTERNATIONAL AG 10%+ Owner $630,561,071 -$599,063,929 -49% 04 Mar 2026
Glencore AG 10%+ Owner $142,054,037 30 Sep 2022
Jesse E. Gary President and CEO, Director $24,961,183 -$7,228,500 -22% 12 Jan 2026
Gunnar Gudlaugsson EVP - Global Operations $7,378,861 -$2,326,300 -24% 25 Feb 2026
John DeZee EVP, GC and Secretary $4,952,655 -$3,347,520 -40% 23 Feb 2026
Peter A. Trpkovski Evp, Cfo $4,395,767 09 Feb 2026
Robert F. Hoffman SVP, IT and CAO $3,784,532 -$714,475 -16% 04 Mar 2026
Matt Aboud SVP, Strategy & Business Dev't $3,415,280 -$1,072,966 -24% 02 Mar 2026
Jarl Berntzen Director $3,378,737 16 Jun 2025
Agust F. Hafberg SVP & Chief Commercial Officer $2,308,823 -$1,437,526 -38% 27 Feb 2026
ERROL GLASSER Director $1,919,330 16 Jun 2025
Gerald C. Bialek Chief Financial Officer $1,859,458 01 Jan 2025
Andrew G. Michelmore Director $1,546,585 16 Jun 2025
Craig C. Conti EVP & Chief Financial Officer $1,420,599 01 Mar 2022
Kenneth L. Calloway SVP, Human Resources $1,386,592 -$452,375 -25% 31 Dec 2025
Michelle Harrison Sr. VP Finance & Treasurer $986,976 30 Dec 2022
Jennifer Mary Bush Director $757,920 16 Jun 2025
Tamla A. Olivier Director $479,812 16 Jun 2025
Theresa L. Brainerd Global Corporate Controller $324,148 01 Sep 2024
Ryfold Ltd 10%+ Owner 15 Dec 2022

Recent Insider Transactions by Companies or Individuals for CENTURY ALUMINUM CO

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
Robert F. Hoffman CENX Common Stock Sale -13% $563,300 $56.33 -10,000 67,172 04 Mar 2026 Direct
Glencore International Ag CENX Common Stock Sale -34.1% $326,813,929 $51.75 -6,315,245 12,184,755 04 Mar 2026 Direct
Matt Aboud CENX Common Stock Sale -4.38% $156,483 $52.67 -2,971 64,843 03 Mar 2026 Direct
Matt Aboud CENX Common Stock Sale -15.2% $636,615 $52.50 -12,126 67,814 02 Mar 2026 Direct
Agust F. Hafberg CENX Common Stock Sale -33.7% $1,172,576 $51.24 -22,884 45,059 27 Feb 2026 Direct
Gunnar Gudlaugsson CENX Common Stock Sale -24% $2,326,300 $54.10 -43,000 136,393 25 Feb 2026 Direct
John DeZee CENX Common Stock Sale -40.3% $3,347,520 $50.72 -66,000 97,647 23 Feb 2026 Direct
Peter A. Trpkovski CENX Common Stock Tax liability -4.98% -4,240 80,864 09 Feb 2026 Direct
Jesse E. Gary CENX Common Stock Sale -33.9% $7,228,500 $48.19 -150,000 292,580 23 Jan 2026 By Trust
Jesse E. Gary CENX Common Stock Gift 245.8% 314,611 442,580 12 Jan 2026 By Trust
Jesse E. Gary CENX Common Stock Gift -53.2% -314,611 277,227 12 Jan 2026 Direct
Jesse E. Gary CENX Common Stock Award 10.8% 57,443 591,838 01 Jan 2026 Direct
Gunnar Gudlaugsson CENX Common Stock Award 9.54% 15,624 179,393 01 Jan 2026 Direct
Agust F. Hafberg CENX Common Stock Award 8.35% 5,238 67,943 01 Jan 2026 Direct
Peter A. Trpkovski CENX Common Stock Award 18.8% 13,488 85,104 01 Jan 2026 Direct
Robert F. Hoffman CENX Common Stock Award 7.11% 5,122 77,172 01 Jan 2026 Direct
John DeZee CENX Common Stock Award 6.38% 9,821 163,647 01 Jan 2026 Direct
Kenneth L. Calloway CENX Common Stock Award 13.9% 5,238 42,902 01 Jan 2026 Direct
Matt Aboud CENX Common Stock Award 7.43% 5,529 79,940 01 Jan 2026 Direct
Jesse E. Gary CENX Common Stock Tax liability -33.6% -270,842 534,395 31 Dec 2025 Direct
Jesse E. Gary CENX Common Stock Award 119.9% 439,090 805,237 31 Dec 2025 Direct
Gunnar Gudlaugsson CENX Common Stock Tax liability -27.7% -62,829 163,769 31 Dec 2025 Direct
Gunnar Gudlaugsson CENX Common Stock Award 57.6% 82,794 226,598 31 Dec 2025 Direct
Agust F. Hafberg CENX Common Stock Tax liability -27.2% -23,433 62,705 31 Dec 2025 Direct
Agust F. Hafberg CENX Common Stock Award 55.9% 30,878 86,138 31 Dec 2025 Direct
Peter A. Trpkovski CENX Common Stock Tax liability -14.5% -12,135 71,616 31 Dec 2025 Direct
Peter A. Trpkovski CENX Common Stock Award 27.9% 18,260 83,751 31 Dec 2025 Direct
Robert F. Hoffman CENX Common Stock Tax liability -20.6% -18,683 72,050 31 Dec 2025 Direct
Robert F. Hoffman CENX Common Stock Award 53.6% 31,650 90,733 31 Dec 2025 Direct
John DeZee CENX Common Stock Tax liability -17.7% -33,134 153,826 31 Dec 2025 Direct
John DeZee CENX Common Stock Award 40.7% 54,042 186,960 31 Dec 2025 Direct
Kenneth L. Calloway CENX Common Stock Tax liability -19.6% -9,192 37,664 31 Dec 2025 Direct
Kenneth L. Calloway CENX Common Stock Award 63.2% 18,150 46,856 31 Dec 2025 Direct
Matt Aboud CENX Common Stock Tax liability -24.9% -24,728 74,411 31 Dec 2025 Direct
Matt Aboud CENX Common Stock Award 58.4% 36,550 99,139 31 Dec 2025 Direct
Glencore International Ag CENX Common Stock Conversion of derivative security 39.4% 4,948,591 17,505,947 10 Nov 2025 See Footnote
Glencore International Ag CENX Common Stock Sale -32.7% $272,250,000 $30.25 -9,000,000 18,500,000 10 Nov 2025 Direct
Glencore International Ag CENX Series A Convertible Preferred Stock Conversion of derivative security -100% -49,486 0 10 Nov 2025 See Footnote
Glencore International Ag CENX Common Stock Conversion of derivative security 0.02% 2,848 12,557,356 30 Sep 2025 See Footnote
Glencore International Ag CENX Series A Convertible Preferred Stock Conversion of derivative security -0.06% -28.48 49,486 30 Sep 2025 See Footnote
Agust F. Hafberg CENX Common Stock Sale -14.7% $264,950 $27.91 -9,493 55,260 26 Sep 2025 Direct
Kenneth L. Calloway CENX Common Stock Sale -36.4% $452,375 $27.50 -16,450 28,706 19 Sep 2025 Direct
Matt Aboud CENX Common Stock Sale -16.1% $279,868 $23.27 -12,027 62,589 12 Aug 2025 Direct
Glencore International Ag CENX Common Stock Conversion of derivative security 0.13% 16,477 12,554,508 30 Jun 2025 See Footnote
Glencore International Ag CENX Series A Convertible Preferred Stock Conversion of derivative security -0.33% -165 49,514 30 Jun 2025 See Footnote
ERROL GLASSER CENX Common Stock Award 7.01% 7,778 118,697 16 Jun 2025 Direct
Tamla A. Olivier CENX Common Stock Award 35.5% 7,778 29,673 16 Jun 2025 Direct
Andrew G. Michelmore CENX Common Stock Tax liability -2.55% -2,333 89,089 16 Jun 2025 Direct
Andrew G. Michelmore CENX Common Stock Award 9.3% 7,778 91,422 16 Jun 2025 Direct
Jennifer Mary Bush CENX Common Stock Award 19.9% 7,778 46,872 16 Jun 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.