CENX CENTURY ALUMINUM CO

“we did not maintain effective internal control over financial reporting as of December 31, 2025 as a result of a material weakness related to deficiencies identified in business process level controls at our Jamalco joint venture and financial reporting controls over the consolidation of the Jamalco joint venture.”

“concluded that our disclosure controls and procedures were not effective as of September 30, 2026.”

“As noted in the Company's Form 10-K for the fiscal year ending December 31, 2025, as filed with the SEC on March 3, 2026, the Company has restated the comparative financial statements including the Consolidated Statement of Operations, Consolidated Balance Sheets, and Consolidated Statement of Stockholders' Equity as of and for the three and nine months ended September 30, 2025, and applicable footnotes.”

“Three months ended September 30, Nine months ended September 30, 2026 2025 2026 2025 (As Restated) (As Restated)”