Boulder Climate Lawsuit Against ExxonMobil and Suncor
The U.S. Supreme Court agreed on February 23, 2026, to hear an appeal from Exxon Mobil Corp. and Suncor Energy Inc. regarding a climate change lawsuit filed by Boulder County and the City of Boulder. As of May 27, 2026, the Supreme Court is reviewing a Colorado Supreme Court ruling that allowed Boulder to use state law to pursue its suit, with the National Federation of Independent Business (NFIB) filing an amicus brief arguing against state-law claims for greenhouse gas emissions. The lawsuit, originally filed on April 17, 2018, seeks to hold the companies accountable for climate change impacts and has progressed through various courts, including the Colorado Supreme Court's May 12, 2025, decision allowing the case to proceed.
Timeline
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May 2026 — 1 developments
The National Federation of Independent Business (NFIB) filed an amicus brief on May 22, 2026, arguin…
The National Federation of Independent Business (NFIB) filed an amicus brief on May 22, 2026, arguing that allowing state-law claims for greenhouse gas emissions would have significant consequences for businesses and the economy, as the Supreme Court considers Boulder County's climate lawsuit.
March 2026 — 1 developments
Eight men have been sentenced to a combined total of over 73 years for the gang rape of a British teenager in Magaluf.
Eight men have been sentenced to a combined total of over 73 years for the gang rape of a British teenager in Magaluf. The plea bargain resulted in sentences ranging from two years and three months to 11 years, with an additional four-year sentence for one defendant. The court also ordered the defendants to pay over €100,000 in compensation to the victim.
February 2026 — 1 developments
The U.S. Supreme Court agreed to hear an appeal from Exxon Mobil Corp. and Suncor Energy Inc. regard…
The U.S. Supreme Court agreed to hear an appeal from Exxon Mobil Corp. and Suncor Energy Inc. regarding the climate change lawsuit. The justices will review a Colorado Supreme Court ruling that allowed the city and county of Boulder to use state law to pursue their suit against the companies. This decision to hear the case follows appeals from the Trump administration and other groups urging the court to take up the matter.
May 2025 — 1 developments
The Colorado Supreme Court ruled that Boulder County and the City of Boulder's climate case against ExxonMobil and Suncor entities could proceed.
The Colorado Supreme Court ruled that Boulder County and the City of Boulder's climate case against ExxonMobil and Suncor entities could proceed. The court rejected the oil companies' request to dismiss the case, stating that federal law did not prevent Colorado courts from applying state law to these claims. This ruling allowed the communities to have their day in court after years of litigation.
April 2023 — 1 developments
The U.S. Supreme Court declined to hear an appeal from Exxon Mobil and Suncor, allowing the climate …
The U.S. Supreme Court declined to hear an appeal from Exxon Mobil and Suncor, allowing the climate lawsuit brought by Colorado communities to proceed in state court. This decision confirmed that the lawsuit is a state matter, paving the way for a trial.
July 2020 — 1 developments
The 10th Circuit Court of Appeals upheld the district court's decision, ruling that the case belonged in state court.
The 10th Circuit Court of Appeals upheld the district court's decision, ruling that the case belonged in state court. The parties continued to litigate in Boulder District Court, where motions to move or dismiss the case were being considered.
December 2019 — 1 developments
A federal district court rejected Exxon and Suncor's arguments to move the case to federal court, issuing an order to remand the case back to state court.
A federal district court rejected Exxon and Suncor's arguments to move the case to federal court, issuing an order to remand the case back to state court. The companies unsuccessfully sought a stay and appealed the decision to the 10th Circuit Court of Appeals.
April 2018 — 1 developments
Boulder County, San Miguel County, and the City of Boulder, with legal support from EarthRights Inte…
Boulder County, San Miguel County, and the City of Boulder, with legal support from EarthRights International, the Hannon Law Firm, and Niskanen Center, filed a lawsuit against Suncor and ExxonMobil. The communities demanded that the companies pay their fair share of the costs associated with climate change impacts, arguing that these costs should not fall disproportionately on taxpayers. A ruling from the Boulder District Court was expected soon.