Ninth Circuit Will Not Enjoin California Climate Disclosure Regulations Before They Enter Into Force

On October 29, 2025, the Ninth Circuit scheduled oral argument on the Chamber of Commerce's appeal of the district court decision denying the sought injunction to block California's mandatory climate disclosure laws--and the oral argument was scheduled for January 9, after the laws enter into effect on January 1, 2026. In other words, companies will be compelled to comply with at least one of the mandatory climate disclosure regulations--that companies with more than $500 million in revenue disclose climate-related financial risks and measures taken to address them--before the Chamber of Commerce's appeal is even heard by the Ninth Circuit, let alone decided. (The mandatory disclosures of Scope 1 and Scope 2 greenhouse gas emissions by companies with more than $1 billion in revenue will likely not be required before mid-2026.)