Century Aluminum Company (CENX) — ESG & Values Scores

Environment story

Century Aluminum operates energy-intensive primary aluminum smelters with a mixed environmental profile. Grundartangi benefits from Iceland's renewable (hydroelectric and geothermal) power, positioning it as a low-carbon producer and achieving ASI certification. However, the company's U.S. operations (Sebree, Mt. Holly) rely on market-based electricity contracts, exposing them to higher-carbon power sources. Scope 1 and Scope 3 emissions are not comprehensively disclosed; product-usage emissions (Scope 3) from end-users of aluminum are not quantified. The company has not disclosed a net-zero target date. Capital improvements have focused on production efficiency and capacity restoration rather than direct decarbonization infrastructure. October 2025 equipment failure at Grundartangi significantly reduced output, limiting near-term emissions reduction potential. The company emphasizes cost-driven efficiency rather than climate-driven mitigation. No evidence of carbon offset reliance detected, but absence of aggressive operational emissions reduction targets or Scope 3 disclosure warrants caution. Environmental score reflects renewable power advantage at one facility offset by opacity on company-wide emissions targets and supply-chain scope.

Criticisms on file

October 2025 electrical equipment failure at Grundartangi reducing production by ~67%; restoration timeline uncertain, expected by end of April 2026.
Source: CENX 10-K Item 1, Item 1A Risk Factors, MD&A.
Hawesville smelter curtailed in Q3 2022 due to historically high energy costs; facility sold February 2026 after remaining fully curtailed since 2022, indicating vulnerability to market-based power risk.
Source: CENX 10-K Item 1 Recent Developments, Item 1A Risk Factors.
No disclosed net-zero commitment or climate target date; company acknowledges increasing regulatory focus on GHG emissions and climate change but does not commit to specific reduction targets or timeline.
Source: CENX 10-K Item 1 Government Regulations section; absence from sustainability disclosure.
Scope 3 emissions (supply-chain and product-use) not disclosed; company does not quantify downstream emissions from aluminum end-use, representing material omission for lifecycle impact assessment.
Source: Company disclosures; 10-K contains no Scope 3 emissions data or supply-chain carbon reporting.
Jamalco bauxite mining operations in Jamaica; environmental and social risks of mining not detailed in filing; material weakness in internal controls over Jamalco consolidation identified, limiting transparency.
Source: CENX 10-K Item 1A 'Risks of Jamalco Joint Venture structure'; Item 9A Controls and Procedures.

Disclosed initiatives

Natur-Al™ Low-Carbon Aluminum Product Line

Grundartangi facility produces primary aluminum with one of the lowest carbon footprints in the industry due to access to hydroelectric and geothermal power sources in Iceland.

Differentiates product offering and provides customer value for low-carbon procurement; does not represent absolute emissions reduction, only relative positioning.
Aluminum Stewardship Initiative (ASI) Certification

Grundartangi facility and corporate headquarters (Chicago) have achieved ASI certification for responsible production, sourcing, and stewardship of aluminum.

Third-party verification of production standards; limited to Grundartangi and HQ, does not cover entire portfolio.
Mt. Holly Capacity Restart Project

August 2025 announcement to return Mt. Holly smelter to 100% production capacity by end of Q2 2026; October 2025 extended power supply agreement with Santee Cooper through 2031 enables this restart.

Production expansion may increase absolute emissions unless coupled with power decarbonization; no renewable energy commitment disclosed for Mt. Holly.
Operational Efficiency Programs

Company states commitment to exploring opportunities to reduce carbon footprint through improving operational efficiencies, investigating alternative power sources, and reprocessing/reusing scrap aluminum.

Vague commitment without quantified targets or timeline; alternative power sources and scope undisclosed.

Social story

Century Aluminum maintains a unionized workforce at 55% of total employee base (approximately 1,600 of 2,906 employees as of December 31, 2025), with active labor agreements at Grundartangi (through 12/31/2029), Sebree (through 10/28/2028), Vlissingen (through 12/31/2026), and Jamalco (expired 12/31/2023, under negotiation). No major strikes or documented union-suppression activities in the past 24 months are disclosed. CEO-to-median-worker pay ratio is not disclosed; unable to assess against 200:1 threshold. Leadership diversity metrics are not provided in filing; executive and board composition details are absent. Supply-chain human-rights risks related to Jamalco's bauxite mining operations are not audited or disclosed. The company emphasizes employee health, safety, and wellness programs, including a Century Well-being program covering mental health and substance abuse counseling. Talent development and internal promotion pathways are mentioned. However, the absence of pay-equity disclosure, diversity percentages, and supply-chain labor audits—particularly for Jamaican mining operations—limits confidence in social governance. Material weakness in internal controls over Jamalco further undermines data reliability. The company's treatment of Hawesville facility workforce (termination of USW labor agreement on February 13, 2026, coinciding with facility sale) raises operational transparency concerns but does not constitute union suppression.

Criticisms on file

CEO-to-median-worker pay ratio not disclosed; unable to assess executive compensation equity.
Source: CENX 10-K; absence of pay-ratio disclosure in proxy or compensation tables.
Leadership and board diversity percentages not disclosed; gender and racial representation in executive and board positions unknown.
Source: CENX 10-K Item 1 Employees section and proxy materials not provided in source documents.
Jamalco labor agreements expired December 31, 2023; salaried and hourly contracts under negotiation as of filing date (December 31, 2025); 2+ year gap between expiration and renewal creates wage-negotiation uncertainty for Jamaica workforce.
Source: CENX 10-K Item 1 Labor Agreements table; Item 1A Risk Factors - Labor.
Jamalco human-rights and labor-practice audits not disclosed; bauxite mining operations in Jamaica subject to geopolitical and environmental risks without documented supply-chain ethics assessment.
Source: CENX 10-K; absence of modern slavery statement, conflict-minerals policy, or labor-practice audit disclosure for Jamalco.
Material weakness in internal controls over Jamalco consolidation (unremediated as of 12/31/2025) raises questions about accuracy of reported employee and operational metrics for that facility.
Source: CENX 10-K Item 9A Controls and Procedures.
Hawesville facility USW labor agreement terminated February 13, 2026, concurrent with facility sale to Terawulf Inc.; workforce transition arrangements not detailed.
Source: CENX 10-K Item 1A Risk Factors - Labor Agreements table.

Disclosed initiatives

Century Well-being Program

Comprehensive employee wellness program covering health, vision, dental, life, prescription, long-term disability, supplemental life and accident insurance; financial incentives for participation; focus on diabetes management, mental health, substance abuse counseling, and musculoskeletal conditions.

Demonstrates commitment to employee health; coverage availability and adoption rates not disclosed.
Retirement and Benefits Structure

401(k) plan with company match; Flexible Spending Account and Health Savings Account options; comprehensive health insurance for non-union employees.

Standard benefits package; no above-market differentiators disclosed.
Talent Development and Recruitment

Internal performance management and talent systems; recruitment at local colleges and institutes; educational opportunities for employee skill development; leadership development from internal ranks.

Indicates commitment to internal advancement; metrics on effectiveness not provided.
Safety and Health Program

Zero-injury aspiration; safety performance metrics and KPIs included in executive annual incentive awards; continuous training and preventative programs; risk management integration across operations.

Safety prioritization in compensation structure is positive; specific incident rates and lagging indicators not disclosed.

Governance story

Century Aluminum exhibits governance vulnerabilities centered on concentrated shareholder control, material weaknesses in financial reporting controls, and lobbying exposure. Glencore, the company's largest customer, beneficially owns 36.4% of outstanding common stock and purchased 54% of 2025 sales; this creates a conflict-of-interest dynamic that may limit board independence in customer negotiations. The 10-K does not disclose board independence percentage, share structure (single or dual-class), or executive composition, making it impossible to verify the 75% independence threshold or assess supermajority voting risks. However, the absence of disclosed dual-class structure suggests single-class equity. Material weaknesses in internal controls over financial reporting related to Jamalco (unremediated as of 12/31/2025) constitute a significant governance failure; errors in previous financial statements related to Jamalco accounting required restatement. The company acknowledges material weaknesses in IT general controls and business process controls at Jamalco, reducing confidence in data accuracy. Lobbying expenditure and PAC contribution data are not disclosed in the 10-K; unable to assess climate-regulation or consumer-protection targeting. The company faces regulatory scrutiny regarding Section 232 and 301 trade actions (tariffs) and potential Inflation Reduction Act Section 45X tax benefits; these are disclosed as risks but do not constitute active regulatory violations. No antitrust, consumer-safety, or financial-fraud proceedings are disclosed. The company's joint-venture agreement with Emirates Global Aluminium (announced January 26, 2026) for a new smelter introduces governance complexity; control rights and partner dispute-resolution mechanisms are not detailed in the 10-K excerpt. Overall, governance score reflects control-concentration risk (Glencore), internal-control material weaknesses, and opacity on board independence and lobbying alignment.

Criticisms on file

Glencore beneficial ownership of 36.4% of outstanding common stock and customer concentration (54% of 2025 sales) creates potential conflicts of interest in customer-facing negotiations and board decision-making; no independent director supermajority or conflict-mitigation mechanism disclosed.
Source: CENX 10-K Item 1 Customer Base; Item 1A Risk Factors - Stock Ownership.
Material weakness in internal controls over financial reporting at Jamalco (unremediated as of December 31, 2025) related to business process controls, reconciliation controls, and consolidation accounting; previous financial statements required restatement.
Source: CENX 10-K Item 9A Controls and Procedures; Note 22 Restatement of Previously Issued Financial Statements.
Board independence percentage not disclosed; unable to verify compliance with 75% independence threshold or assess director nomination/compensation committee composition.
Source: CENX 10-K; proxy statement not provided in source documents.
Lobbying expenditures and PAC contributions not disclosed in 10-K; unable to assess alignment with climate regulation or consumer-protection policy positions.
Source: CENX 10-K; absence of lobbying or political-contribution disclosure in business or risk sections.
Joint-venture formation with Emirates Global Aluminium (announced January 26, 2026) for new smelter; governance structure, control rights, and dispute-resolution mechanisms for 60% EGA / 40% Century joint venture not detailed in 10-K.
Source: CENX 10-K Item 1 Recent Developments - New Smelter Project.
Company subject to Section 232 and 301 trade remedy actions (tariffs) and reliant on Inflation Reduction Act Section 45X tax benefits; regulatory dependency creates policy-volatility risk but does not constitute disclosed violations or fines.
Source: CENX 10-K Item 1A Risk Factors - Trade Laws; Inflation Reduction Act Section 45X.

Disclosed initiatives

Code of Ethics

Code of ethics applies to all employees; available on company website and SEC filings; ownership reports filed on Forms 3, 4, 5 by directors, executives, and >10% beneficial owners.

Standard governance disclosure; does not address board composition or independence metrics.
Internal Control Remediation Plan for Jamalco

Company is actively developing remediation plans to address material weaknesses in business process controls and financial reporting controls at Jamalco joint venture; IT general controls weakness was remediated in fiscal 2025; business process controls remain unremediated as of 12/31/2025.

Remediation effort ongoing; unremediated weakness limits confidence in consolidated financial reporting accuracy.
Risk Management and Compliance Monitoring

Company continuously reviews GHG and emissions streams; monitors climate-change legislation; assesses contingent liabilities and environmental remediation requirements; maintains forward-looking statements safe harbor.

Demonstrates awareness of regulatory landscape; no specific climate-governance committee or sustainability governance framework disclosed.

These are Missionomics' own editorial scores — directional signals built from disclosed facts under a published method, not certifications or definitive ratings of Century Aluminum Company. Coverage and confidence vary by data point, and figures can lag real-world changes. Read the full Methodology for sourcing, scoring, and correction details — or open Century Aluminum Company in the app for interactive charts and portfolio building.

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