The U.S. Supreme Court in West Virginia v. Environmental Protection Agency, recently struck down the EPA’s “Clean Power Plan Rule” that sought to reduce carbon dioxide emissions. The court concluded that the rule exceeded the EPA’s power, as it presented a “major question” of economic and national importance that required a clearer statement from Congress to confer such authority. But the “major questions” doctrine also has implications for other federal agencies—who together issue an estimated three thousand to five thousand final rules per year. This article looks at the SEC’s attempts to mandate more climate-related disclosures with West Virginia in mind.