California Court: Exxon Mobil's Climate Disclosure Law Challenge Survives

• A federal court in California initially upheld the validity of S.B. 261, a law requiring climate-related financial risk disclosures, but its enforcement is currently halted by a Ninth Circuit injunction.
• Exxon Mobil's challenge to the law, based on claims that it is preempted by the National Securities Markets Improvement Act, is currently on hold due to the broader injunction.
• The injunction means companies are not currently required to comply with S.B. 261, pending the resolution of the appeal.

While an initial court found that the California law does not require firms to alter their federal filings with the SEC and that the fine does not prevent companies from offering securities to Californian investors, enforcement of S.B. 261 is currently paused by a Ninth Circuit injunction.

A federal court in California initially delivered a blow to Exxon Mobil's efforts to challenge a state law requiring climate-related financial risk disclosures. However, the enforcement of S.B. 261 is currently halted by an injunction pending appeal in the Ninth Circuit, which was granted on November 18, 2025. This means companies are not currently required to comply with the statute, despite Exxon Mobil's claims that it is preempted by federal law. In its lawsuit, filed October 24, 2025, Exxon Mobil argued that the California law imposes an undue burden on firms, forcing them to alter their federal Securities and Exchange Commission filings. Exxon Mobil's specific challenge to S.B. 261 is effectively on hold, as the parties stipulated to vacate briefing deadlines following the Ninth Circuit's injunction in a related case.

The National Securities Markets Improvement Act has been at the center of Exxon Mobil's challenge to S.B. 261. The initial court found that the California law does not require companies to make changes to their federal filings with the SEC. The initial ruling also addressed the fine imposed on firms that fail to disclose climate-related financial risks, determining that it does not prevent companies from offering securities to Californian investors. However, enforcement of S.B. 261, including any fines, is currently paused due to the Ninth Circuit injunction. This decision underscores the importance of state-level regulations in addressing climate change and its economic implications, though the legal landscape remains in flux.

The current injunction has significant implications for companies operating in California, particularly those with exposure to climate-related financial risks. Lawyers advising clients on California operations should be aware that while S.B. 261 remains a law, its enforcement is paused pending the Ninth Circuit's appeal decision. The decision also highlights the need for companies to carefully navigate state-level regulations and disclose climate-related risks to investors, while also monitoring ongoing legal challenges.

Lawyers advising clients on California operations should review the implications of this ruling and ensure compliance with S.B. 261, which remains in effect despite Exxon Mobil's challenge.

Source: Original reporting via various news sources