Century Aluminum Company (CENX) is changing its accounting method for the Jamalco joint venture's production assets from proportionate consolidation to full consolidation, which will increase noncontrolling interest. This 'Accounting Change' was prompted by a series of comment letters from the SEC Staff regarding the company's Annual Report on Form 10-K for the fiscal year ended December 31, 2023, and its Quarterly Report on Form 10-Q for the three months ended September 30, 2024. Management and the Audit Committee initially concluded the change was immaterial but reversed this decision on March 2, 2026, after further disagreement from the SEC Staff on the materiality conclusion. As a result, previously issued consolidated financial statements for fiscal years ended December 31, 2023, and December 31, 2024, and interim periods ended March 31, 2024, June 30, 2024, September 30, 2024, March 31, 2025, June 30, 2025, and September 30, 2025, should no longer be relied upon and will be restated. The Accounting Change does not impact Net income attributable to Century Stockholders or Total Century stockholders equity for any period. The change also does not affect non-GAAP financial measures (including adjusted EBITDA), debt covenant compliance, or compensation of employees or executive officers. The change has the effect of increasing Total assets, Noncontrolling interests, and Total equity, while decreasing Gross profit by less than 10% due to increased depreciation and amortization expense related to 100% of the Jamalco Production Assets. The company expects to report a material weakness in internal controls over financial reporting in connection with the restatement.