Item 5. Other Information
Item 5. Other Information
Rule 10b5-1 Trading Plans
On August 20, 2025 , the Company’s President, Chief Executive Officer and Director , Jesse E. Gary , adopted a pre-arranged trading plan intended to satisfy the conditions of Rule 10b5-1(c)(1) under the Exchange Act (the “10b5-1 Plan”). The 10b5-1 Plan provides for the potential sale of an aggregate of up to 300,000 shares of the Company’s common stock. The first date that sales of any shares are permitted to be sold under the 10b5-1 Plan is January 2026, and subsequent sales may occur from time to time until the 10b5-1 Plan’s expiration on January 2027 , or earlier if all transactions are completed prior to such date or otherwise terminated.
Other than as described above, no other director or “officer” (as defined in Rule 16a-1(f) promulgated under the Exchange Act) adopted , modified, or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement” (as such terms are defined under Item 408 of Regulation S-K) during the three months ended September 30, 2025.
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Item 6. Exhibits
Exhibit Number Description of Exhibit Incorporated by Reference Filed Herewith
Form File No. Filing Date
31.1
Rule 13a-14(a)/15d-14(a) Certification of the Chief Executive Officer
X
31.2
Rule 13a-14(a)/15d-14(a) Certification of the Principal Financial Officer
X
32.1
Section 1350 Certification (pursuant to Sarbanes-Oxley Section 906) by Chief Executive Officer
X
32.2
Section 1350 Certification (pursuant to Sarbanes-Oxley Section 906) by Principal Financial Officer
X
101.INS XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH Inline XBRL Taxonomy Extension Schema X
101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase X
101.DEF Inline XBRL Taxonomy Extension Definition Linkbase X
101.LAB Inline XBRL Taxonomy Extension Label Linkbase X
101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase X
104 Cover Page Interactive Data File (embedded within the Inline XBRL document)
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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
Century Aluminum Company
Date: November 6, 2025 By: /s/ PETER TRPKOVSKI
Peter Trpkovski
Executive Vice President, Chief Financial Officer and Treasurer
(Principal Financial Officer)
Date: November 6, 2025 By: /s/ ROBERT HOFFMAN
Robert Hoffman
Senior Vice President, Chief Information Officer and Chief Accounting Officer
(Principal Accounting Officer)
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Text extracted from the filing as submitted to EDGAR. Formatting, tables and exhibits are simplified for reading; the original document is authoritative for anything you rely on.