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Suncor Energy Inc. v. County Commissioners of Boulder County

Docket No. Op. BelowArgument Opinion Vote Author Term
25-170 Colo. TBD TBD TBD TBD OT 2026

Issue: (1) 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; and (2) Whether this court has statutory and Article III jurisdiction to hear this case

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.
01/20/2026DISTRIBUTED for Conference of 1/23/2026.
02/13/2026DISTRIBUTED for Conference of 2/20/2026.
02/23/2026Petition GRANTED. In addition to the question presented by the petition, the parties are directed to brief and argue the following question: Whether this Court has statutory and Article III jurisdiction to hear this case.
02/27/2026Motion for an extension of time to file the briefs on the merits filed.
03/11/2026Motion to extend the time to file the briefs on the merits granted. The time to file the joint appendix and petitioners' brief on the merits is extended to and including May 14, 2026. The time to file respondents' brief on the merits is extended to and including July 27, 2026.