Supreme Court to Hear Challenge to Climate Lawsuits Against Oil Companies

Suncor and Exxon seek to halt climate-related lawsuits filed by Boulder, Colorado

Published on Feb. 23, 2026

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The U.S. Supreme Court has agreed to take an appeal by oil companies Suncor Energy (U.S.A.) Inc. and Exxon Mobil Corp. that seek to halt climate-related lawsuits filed against them by the City of Boulder, Colorado. The oil companies argue that state law does not allow lawsuits targeting a global issue like climate change, while Boulder alleges the companies misled the public about the risks of fossil fuels.

Why it matters

This case could have significant implications for the ability of cities and states to hold fossil fuel companies accountable for their role in climate change through legal action. The Supreme Court's decision could set an important precedent on the scope of state law in addressing climate-related harms.

The details

The Supreme Court granted the petition in Suncor Energy (U.S.A.) Inc. v. County Commissioners of Boulder County, agreeing to review a Colorado Supreme Court ruling that allowed Boulder to use state law to file a lawsuit against the oil companies. Exxon Mobil Corp. is also a co-petitioner in the case. The oil companies argue that state law does not permit lawsuits targeting a worldwide issue like climate change, while Boulder alleges the companies misled the public about the risks of fossil fuels.

  • The Supreme Court agreed to hear the case on February 23, 2026.
  • The Colorado Supreme Court previously ruled in favor of Boulder in allowing the lawsuit to proceed.

The players

Suncor Energy (U.S.A.) Inc.

An oil and gas company that is a subsidiary of the Canadian firm Suncor Energy Inc.

Exxon Mobil Corp.

One of the world's largest publicly traded oil and gas companies.

City of Boulder, Colorado

A city in Colorado that has filed a lawsuit against the oil companies, alleging they misled the public about the risks of fossil fuels.

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What’s next

The Supreme Court will hear arguments in the case and issue a ruling, which could determine the future of climate-related lawsuits against fossil fuel companies.

The takeaway

This case highlights the ongoing legal battles between cities/states and fossil fuel companies over climate change, with the Supreme Court set to play a pivotal role in shaping the scope of such lawsuits going forward.