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Clayton Gregersen is a Partner in the Billings office and a member of the Commercial and Natural Resources Litigation Practice Group. Clayton specializes in all types of litigation, with a focus on contract disputes, tort litigation, construction law, access disputes, real estate, and energy and natural resources law. 

Clayton has represented clients, large and small, in state and federal courts, and before state and federal administrative agencies. He takes his role as an advocate for his clients seriously and is always available to advise them on potential litigation exposure. 

Clayton graduated, with honors, from the University of Wyoming College of Law, where he was a member of the Law Review, and gained experience working as a clerk for the Wyoming Supreme Court and for the Wyoming Attorney General’s Office. Clayton is an active member of the Montana and Wyoming state bar associations, as well as organizations related to the practice of law, particularly those related to natural resources. He was named as one of the Best Lawyers in America: Ones to Watch® for  Commercial Litigation, Energy Law, Environmental Law, and Natural Resources Law in 2024. 

Outside of his practice, Clayton serves as Vice President of the Board of Directors for CASA Yellowstone County, an organization that helps assign court appointed advocates for children in the foster system to ensure the kids have a say in what their life will be like.

Originally from Big Horn, Wyoming, Clayton spends his time away from work with his wife, Laura, and their two daughters. He enjoys golfing, snowboarding, hunting, fishing and enjoying all of the benefits the Rocky Mountain outdoors have to offer.

  • The Best Lawyers in America: Ones to Watch® Commercial Litigation, Energy Law, Environmental Law, Natural Resources Law, 2024
  • The Foundation for Natural Resources and Energy Law Scholar, 2014
  • Partnered with Justice Kate M. Fox of the Wyoming Supreme Court in the First Annual Spence Law Firm Historical Trial

  • State Bar of Montana
  • State Bar of Wyoming, Federal Law Section; Natural Resources Section
  • The Foundation for Natural Resources and Energy Law
  • Montana Association of Petroleum Landmen
  • Wyoming Association of Petroleum Landmen
  • Yellowstone Area Bar Association

  • CASA Yellowstone County, Vice President of the Board, 2022-present

  • Presenter, “16th Annual Montana Water Law Seminar,” Update on Water Quality Issues, The Seminar Group (October 2016).

Alexander v. MDU, CV-18-82-GF-BMM (D. Mont.)

This case addressed whether a natural gas provider could be liable for failing to use billing data to monitor and detect gas leaks inside customers’ homes, which would have significantly expanded utility providers’ duties and obligations. We obtained favorable rulings on key orders—2020 WL 4933624 (Aug. 24, 2020) and 2020 WL 6262101 (Oct. 23, 2020)—where the court granted summary judgment, rejecting strict products liability and implied warranty claims. Liability was limited to negligence, preserving the provider’s limited duties regarding data collection for billing purposes. The case ultimately settled without expanding the provider’s obligations.

Lon V. Smith Foundation v. Devon Energy, 2017 WY 121, 403 P.3d 997

Facing an initial claim from the plaintiff of several million dollars, we prevailed on summary judgment, with the Wyoming Supreme Court affirming that the plaintiff lacked ownership of the royalty interest at issue, and obtaining a complete dismissal of all claims against our client. A related follow-up asserted against the same client was also dismissed, freeing Devon Energy from any liability based upon royalty payments.

Piercing the Corporate Veil and Bankruptcy Non-Dischargeability

We obtained summary judgment in Wyoming Bankruptcy Court, successfully piercing the corporate veil to hold an LLC member and successor LLC liable for the outstanding debt. The debt was also deemed non-dischargeable under 11 U.S.C. 523(a)(2) due to fraud.

Cohodes v. Leadbetter, Gallatin County, Montana, DV-21-1151B

In this ongoing case, we secured summary judgment in favor of the seller against a buyer’s claims of fraud, dismissing allegations of nondisclosure of material adverse facts in a real estate transaction.

WPX Energy Williston, LLC, IBLA 2019-166

Before the Interior Board of Land Appeals, we successfully obtained stay relief against a Bureau of Land Management decision requiring WPX to apply for and drill additional wells, maintaining WPX’s operational discretion in the spacing unit.

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