On Oct. 7, 2023, California Governor Gavin Newsom signed into law Senate Bill (SB) 253 and SB 261, both of which dramatically expand corporate climate disclosures for both private and public companies doing business in California. This development comes as the United States Securities and Exchange Commission (SEC) is finalizing new rules that would mandate public companies to make climate-related disclosures in their annual reports and registration statements. California’s new laws require disclosures beyond what the SEC has proposed.