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Suncor Energy Inc. v. County Commissioners of Boulder County

Pending petition

Docket No. Op. BelowArgument Opinion Vote Author Term
25-170 Colo. TBD TBD TBD TBD TBD

Issue: Whether federal law precludes state-law claims seeking relief for injuries allegedly caused by the effects of interstate and international greenhouse-gas emissions on the global climate.

SCOTUSblog Coverage

DateProceedings and Orders (key to color coding)
08/08/2025Petition for a writ of certiorari filed. (Response due September 11, 2025)
08/28/2025Waiver of right of respondent Cty. Comm'rs of Boulder Cty., et al. to respond filed.
09/03/2025DISTRIBUTED for Conference of 9/29/2025.
09/04/2025Letter received from Suncor Energy (U.S.A.) Inc., et al.
09/05/2025Brief amici curiae of General (Retired) Richard B. Myers, et al. filed.
09/09/2025Response Requested. (Due October 9, 2025)
09/11/2025Brief amici curiae of Frontier Institute, et al. filed.
09/11/2025Brief amicus curiae of United States filed.
09/11/2025Brief amici curiae of Atlantic Legal Foundation, et al. filed.
09/11/2025Brief amici curiae of Professor Richard Epstein, et al. filed.
09/12/2025Brief amicus curiae of American Tort Reform Association filed.
09/15/2025Brief amicus curiae of American Petroleum Institute filed.
09/24/2025Motion to extend the time to file a response from October 9, 2025 to November 10, 2025, submitted to The Clerk.
09/25/2025Motion to extend the time to file a response is granted and the time is extended to and including November 10, 2025.
09/26/2025Brief amici curiae of Alabama, et al. filed.
10/09/2025Brief amicus curiae of Professor Jason Johnston filed.
10/09/2025Brief amici curiae of House Majority Leader Steve Scalise, et al. filed.
10/09/2025Brief amicus curiae of National Association of Manufacturers filed.
10/09/2025Brief amicus curiae of Chamber of Commerce of the United States of America filed.
11/10/2025Brief of respondents County Commissioners of Boulder County, et al. in opposition filed.
11/25/2025DISTRIBUTED for Conference of 12/12/2025.
11/25/2025Reply of petitioners Suncor Energy (U.S.A.) Inc., et al. filed. (Distributed)
01/05/2026DISTRIBUTED for Conference of 1/9/2026.
01/12/2026DISTRIBUTED for Conference of 1/16/2026.