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09 October, 2025

California’s new climate disclosure laws: What companies need to know before 2026

California has introduced two landmark climate disclosure laws, SB 253 and SB 261, setting the toughest corporate reporting standards in the United States. Together they will require thousands of companies, both domestic and international, to measure and publicly disclose their greenhouse gas emissions and climate-related financial risks.

With the first deadlines approaching in early 2026, businesses operating in California should begin preparing the systems, data, and governance processes needed for compliance.

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