Motion 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.

Motion for an extension of time to file the briefs on the merits filed.

Petition 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.

DISTRIBUTED for Conference of 2/20/2026.

DISTRIBUTED for Conference of 1/23/2026.

DISTRIBUTED for Conference of 1/16/2026.

DISTRIBUTED for Conference of 1/9/2026.

DISTRIBUTED for Conference of 12/12/2025.

Reply of petitioners Suncor Energy (U.S.A.) Inc., et al. filed. (Distributed)

Brief of respondents County Commissioners of Boulder County, et al. in opposition filed.

Brief amici curiae of House Majority Leader Steve Scalise, et al. filed.

Brief amicus curiae of Chamber of Commerce of the United States of America filed.

Brief amicus curiae of National Association of Manufacturers filed.

Brief amicus curiae of Professor Jason Johnston filed.

Brief amici curiae of Alabama, et al. filed.

Motion to extend the time to file a response is granted and the time is extended to and including November 10, 2025.

Motion to extend the time to file a response from October 9, 2025 to November 10, 2025, submitted to The Clerk.

Brief amicus curiae of American Petroleum Institute filed.

Brief amicus curiae of American Tort Reform Association filed.

Brief amicus curiae of United States filed.

Brief amici curiae of Professor Richard Epstein, et al. filed.

Brief amici curiae of Atlantic Legal Foundation, et al. filed.

Brief amici curiae of Frontier Institute, et al. filed.

Response Requested. (Due October 9, 2025)

Brief amici curiae of General (Retired) Richard B. Myers, et al. filed.

Letter received from Suncor Energy (U.S.A.) Inc., et al.

DISTRIBUTED for Conference of 9/29/2025.

Waiver of right of respondent Cty. Comm'rs of Boulder Cty., et al. to respond filed.

Petition for a writ of certiorari filed. (Response due September 11, 2025)

Suncor Energy (U.S.A.) Inc., et al., Petitioner, represented by Kannon K. Shanmugam

Cty. Comm'rs of Boulder Cty., et al., Respondent, represented by Kevin K. Russell

Cty. Comm'rs of Boulder Cty., et al., Respondent, represented by Marco Benjamin Simons

American Petroleum Institute, Amicus Curiae, represented by Mark Andrew Perry

American Tort Reform Association, Amicus Curiae, represented by Cary Silverman

Atlantic Legal Foundation, Washington Legal Foundation, and Federation of Defense & Corporate Counsel, Amicus Curiae, represented by Lawrence S. Ebner

Frontier Institute, Independence Institute, Pelican Institute, and Manhattan Institute, Amicus Curiae, represented by Ilya Shapiro

General (Retired) Richard B. Myers and Admiral (Retired) Michael G. Mullen, Amicus Curiae, represented by Tristan L. Duncan

House Majority Leader Steve Scalise and 102 Other Members of Congress, Amicus Curiae, represented by Jared Michael Kelson

Professor Jason Johnston, Amicus Curiae, represented by Ryan Joseph Walsh

Professor Richard Epstein and Professor John Yoo, Amicus Curiae, represented by Ivan Laurence London

State of Alabama and 25 Other States, Amicus Curiae, represented by Alexander Barrett Bowdre

The Chamber of Commerce of the United States of America, Amicus Curiae, represented by William McGinley Jay

The National Association of Manufacturers, Amicus Curiae, represented by Philip S. Goldberg

United States, Amicus Curiae, represented by Sarah Michelle Harris