ExxonMobil has sued California over a pair of state laws that force big companies to disclose financial climate risks to shareholders and the full greenhouse gas emissions resulting from their businesses — arguing that the measures violate the company’s free speech. It’s the latest example of Exxon, the biggest U.S. oil company, wielding the First Amendment as both a shield and sword in court.

The California Climate Accountability Package, which passed in 2023, would make companies doing business in California disclose emissions that result from the use of their products — also known as “Scope 3” emissions. That category makes up the vast majority of emissions from the oil and gas industry, but companies including Exxon have fought to avoid making them transparent.

Exxon’s new lawsuit argues that by requiring it to account for the entirety of its emissions, the laws would force it to “espouse California’s preferred framing for issues of immense public concern” and to “describe its emissions and climate-related risks in terms the company fundamentally disagrees with.” The lawsuit asks a U.S. District Court to stop California from enforcing the laws.

The case targets the country’s only existing disclosure laws for greenhouse gas emissions, even as the federal government ends emissions reporting and required climate disclosures at the federal level. But it’s also part of a years-long trend of corporations using First Amendment arguments in an attempt to shield themselves from scrutiny and regulation, experts say.

“​​This is part of a long history of companies including Exxon trying to use the First Amendment to block regulation that they dislike,” said Amanda Shanor, an associate professor of legal studies and business ethics at the Wharton School of the University of Pennsylvania, who has chronicled some of those high-stakes efforts. “That’s not really how the First Amendment works or is supposed to work.”