CENTURY ALUMINUM CO

For the period ended Dec 31, 2025. Filed Mar 3, 2026.

About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 3, 2026

CENX$36.42-0.5%Stored close · as of Nov 10, 2026

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Contents

Item 15. Exhibits and Financial Statement Schedules

(a) (1) List of Financial Statements

The following consolidated financial statements of Century Aluminum Company and the Independent Auditors’ Reports are included in Part II, Item 8 of this Form 10-K:

Reports of Independent Registered Public Accounting Firm

Consolidated Statements of Operations for the years ended December 31, 2025, 2024 and 2023

Consolidated Statements of Comprehensive Income (Loss) for the years ended December 31, 2025, 2024 and 2023

Consolidated Balance Sheets as of December 31, 2025 and 2024

Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2025, 2024 and 2023

Consolidated Statements of Cash Flows for the years ended December 31, 2025, 2024 and 2023

Notes to the consolidated financial statements

(a) (2) List of financial Statement Schedules

None. All required information has been included in the consolidated financial statements or notes thereto.

(a) (3) List of Exhibits

Exhibit Index
Incorporated by Reference
Exhibit Number · Description of Exhibit · Form · File No. · Filing Date · Filed Herewith
3.1	Amended and Restated Certificate of Incorporation of Century Aluminum Company.	10-Q	001-34474	November 9, 2012
3.2	Amended and Restated Bylaws of Century Aluminum Company.	8-K	001-34474	December 6, 2019
4.1	Form of Stock Certificate.	10-K	001-34474	February 28, 2018
4.2	Certificate of Designation, Preferences and Rights of Series A Convertible Preferred Stock of Century Aluminum Company, dated July 7, 2008.	8-K	000-27918	July 8, 2008
4.3	Indenture for Century Aluminum Company's 2.75% Convertible Senior Notes due 2028, dated as of April 9, 2021, by and among Century Aluminum Company, as issuer, and Wilmington Trust, National Association, as trustee.	8-K	001-34474	April 12, 2021
4.4	Form of Note for the Indenture for Century Aluminum Company's 2.75% Convertible Senior Notes due 2028, dated as of April 9, 2021, between Century Aluminum Company, as issuer, and Wilmington Trust Company, as trustee.	8-K	001-34474	April 12, 2021
4.5	Indenture for Century Aluminum Company's 6.875% Senior Secured Notes due 2032, dated as of July 22, 2025, by and among Century Aluminum Company, the guarantors party thereto and Wilmington Trust, National Association, as trustee and noteholder collateral agent.	8-K	001-34474	July 24, 2025
4.6	Form of 6.875% Senior Secured Note due 2032 (included as Exhibit A to the Indenture filed as Exhibit 4.5).	8-K	001-34474	July 24, 2025

4.7	Description of Common Stock.	10-K	001-34474	February 27, 2020
10.1	Share Sale and Purchase Agreement, dated as of May 2, 2023, by and among Century Aluminum Jamaica Holdings, Inc., Noble New Asset Intermediate Co Limited, Noble Group Holdings Limited and Noble Resources International Pte, Ltd.	8-K	001-34474	May 5, 2023
10.2	Second Lien Pledge and Security Agreement, dated as of July 22, 2025, by and among Century Aluminum Company, the other Grantors (as defined therein) and Wilmington Trust, National Association, as collateral agent of the 6.875% Senior Secured Notes due 2032.	8-K	001-34474	July 24, 2025
10.3	Collateral Agency Agreement, dated as of July 22, 2025, by and among Century Aluminum Company, the other Grantors party thereto and Wilmington Trust, National Association, as trustee and collateral agent.	8-K	001-34474	July 24, 2025
10.4	Second Amended and Restated Loan and Security Agreement, dated as of May 16, 2018, among Century Aluminum Company, Century Aluminum of South Carolina, Inc., Century Aluminum of Kentucky General Partnership, NSA General Partnership and Century Aluminum Sebree LCC, as borrowers, and Wells Fargo Capital Finance, LLC, as agent and lender ("Second Amended and Restated Loan and Security Agreement").	10-Q	001-34474	November 2, 2018
10.5	Amendment No. 1, dated as of June 17, 2020 to the Second Amended and Restated Loan and Security Agreement.	8-K	001-34474	June 18, 2020
10.6	Amendment No. 2, dated as of June 15, 2021 to the Second Amended and Restated Loan and Security Agreement.	10-Q	001-34474	August 5, 2021
10.7	Amendment No. 3, dated as of December 23, 2021 to the Second Amended and Restated Loan and Security Agreement.	8-K	001-34474	December 27, 2021
10.8	Amendment No. 4 dated June 14, 2022 to the Second Amended and Restated Loan and Security Agreement.	8-K	001-34474	June 16, 2022
10.9	Amendment No. 5 dated July 22, 2025, to the Second Amended and Restated Loan and Security Agreement.	8-K	001-34474	July 24, 2025
10.1	Facility Agreement dated 9 December 2022 among Century Aluminum Vlissingen B.V. as borrower and Glencore international AG as lender	8-K	001-34474	December 12, 2022
10.11	Amendment to Facility Agreement dated October 1, 2024 among Century Aluminum Vlissingen B.V. as borrower and Glencore International AG as lender	10-Q	001-34474	November 4, 2024
10.12	Revolving Credit Facility, dated November 27, 2013, between Nordural Grundartangi ehf, as borrower, and Landsbankinn hf.	10-K	001-34474	March 14, 2014
10.13	Amendment to Revolving Credit Facility, dated April 14, 2016, between Nordural Grundartangi ehf, as borrower, and Landsbankinn hf.	8-K	001-34474	April 15, 2016
10.14	Amendment to Revolving Credit Facility, dated December 15, 2017, between Nordural Grundartangi ehf, as borrower, and Landsbankinn hf	10-K	001-34474	February 28, 2018
10.15	Amendment to Revolving Credit Facility, dated October 2, 2019, between Nordural Grundartangi ehf, as borrower, and Landsbankinn hf	10-Q	001-34474	November 8, 2019
10.16	Amendment to Revolving Credit Facility, dated September 20, 2021, between Nordural Grundartangi ehf, as borrower, and Landsbankinn hf	10-Q	001-34474	November 5, 2021
10.17	Amendment to Revolving Credit Facility, dated February 4, 2022, between Nordural Grundartangi ehf, as borrower and Landsbankinn hf	8-K	001-34474	February 9, 2022

10.18	Amendment Agreement to General Bond, dated as of November 27, 2013, by and between Nordural Grundartangi ehf and Landsbankinn hf.	10-K	001-34474	March 14, 2014
10.19	Amendment to Revolving Credit Facility, dated September 28, 2022, between Nordural Grundartangi ehf, as borrower and Landsbankinn hf	10-Q	001-34474	November 7, 2022
10.20	Amendment to Revolving Credit Facility, dated December 7, 2023, between Nordural Grundartangi ehf, as borrower and Landsbankinn hf	10-K	001-34474	March 15, 2024
10.21	Term Facility Agreement, dated as of November 2, 2021, by and between Nordural Grundartangi ehf and Arion Bank hf.	8-K	001-34474	November 3, 2021
10.22	Term Facility Agreement, dated as of September 29, 2022, by and between Nordural Grundartangi ehf, as borrower, and Arion Bank hf	10-Q	001-34474	November 7, 2022
10.23	Form of Capped Call Confirmation	8-K	001-34474	April 12, 2021
10.24	Stock Purchase Agreement, dated as of July 7, 2008, by and between Century Aluminum Company and Glencore Investment Pty Ltd.	8-K	000-27918	July 8, 2008
10.25	Standstill and Governance Agreement, dated as of July 7, 2008, by and between Century Aluminum Company and Glencore AG.	8-K	000-27918	July 8, 2008
10.26	Amendment to Standstill and Governance Agreement, dated January 27, 2009, by and between Century Aluminum Company and Glencore AG.	10-K	001-34474	March 16, 2010
10.27	Registration Rights Agreement, dated as of July 7, 2008, by and between Century Aluminum Company and Glencore Investment Pty Ltd.	8-K	000-27918	July 8, 2008
10.28	Century Aluminum Company Amended and Restated Executive Severance Plan, adopted June 23, 2014.*	8-K	001-34474	June 27, 2014
10.29	Century Aluminum Company Amended and Restated Supplemental Retirement Income Benefit Plan.*	10-Q	000-27918	August 10, 2009
10.30	First Amendment of the Century Aluminum Company Amended and Restated Supplemental Retirement Income Benefit Plan.*	10-K	001-34474	March 16, 2010
10.31	Second Amendment of the Century Aluminum Company Amended and Restated Supplemental Retirement Income Benefit Plan, adopted June 23, 2014.*	8-K	001-34474	June 27, 2014
10.32	Century Aluminum Company Annual Incentive Plan.*	10-K	001-34474	March 2, 2015
10.33	Century Aluminum Company Amended and Restated Stock Incentive Plan, adopted June 23, 2014.*	8-K	001-34474	June 27, 2014
10.34	Century Aluminum Company Amended and Restated Long-Term Incentive Plan, adopted March 22, 2016.*	8-K	001-34474	March 24, 2016
10.35	Century Aluminum Company Amended and Restated Stock Incentive Plan, adopted June 3, 2019.*	8-K	001-34474	June 6, 2019
10.36	Century Aluminum Company Restoration Plan, adopted December 8, 2015.*	8-K	001-34474	December 14, 2015
10.37	Form of Time-Vesting Performance Share Unit Award Agreement for awards under the 2014 Amended and Restated Stock Incentive Plan.*	8-K	001-34474	June 27, 2014
10.38	Form of Performance Unit Award Agreement for awards under the 2014 Amended and Restated Stock Incentive Plan.*	8-K	001-34474	March 24, 2016
10.39	Form of Time-Vesting Share Unit Award Agreement for awards under the 2019 Amended and Restated Stock Incentive Plan.*	10-K	001-34474	February 27, 2020
10.4	Form of Performance Unit Award Agreement for awards under the 2019 Amended and Restated Stock Incentive Plan.*	10-K	001-34474	February 27, 2020

10.41	Form of Independent Non-Employee Director Annual Equity-Grant Time-Vesting Share Unit Award Agreement.*	10-K	001-34474	February 27, 2020
10.42	Form of Independent Non-Employee Director Annual Retainer Fee Payment Time-Vesting Share Unit Award Agreement.*	10-K	001-34474	February 27, 2020
10.43	Form of Indemnification Agreement.*	8-K	001-34474	December 5, 2014
10.44	Jesse E. Gary Offer Letter, dated May 17, 2021*	8-K	001-34474	May 17, 2021
10.45	Retirement and Transition Agreement, dated May 17, 2021, between Century Aluminum Company and Michael A. Bless*	8-K	001-34474	May 17, 2021
19.1	Insider Trading Policy	10-K	001-34474	March 3, 2025
21.1	List of Subsidiaries				X
23.1	Consent of Deloitte & Touche LLP				X
23.2	Consent of Aluminium Industry Professionals Inc.				X
24.1	Powers of Attorney				X
31.1	Rule 13a-14(a)/15d-14(a) Certification of the Principal 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 Principal Executive Officer				X
32.2	Section 1350 Certification (pursuant to Sarbanes-Oxley Section 906) by Principal Financial Officer				X
96.1	Technical Report Summary for Jamalco	10-K	001-34474	March 3, 2025
97.1	Incentive Compensation Recoupment Policy	10-K	001-34474	March 3, 2025
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	XBRL Taxonomy Extension Schema				X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase				X
101.DEF	XBRL Taxonomy Extension Definition Linkbase				X
101.LAB	XBRL Taxonomy Extension Label Linkbase				X
101.PRE	XBRL Taxonomy Extension Presentation Linkbase				X
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)
*	Management contract or compensatory plan.

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