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Cornerstone Petroleum Resources

Cornerstone Petroleum Resources is an exploration and production company located in Fort Worth, Texas. The company primarily focuses on the development of shale oil resources via joint ventures, farm-ins and organic leasing opportunities with existing acreage owners and operators. Cornerstone is managed by a team of proven operational experts in horizontal drilling and hydraulic fracturing techniques, led by Lee Matthews (President and CEO).

Initial Investment: 2013
Realized Date: July 2025
  • Crown Oil Partners V/ BC Operating
  • Mavros Minerals
  • Post Oak Minerals II
  • RAM Energy Resources
  • Cornerstone Petroleum Resources
  • National Specialty Alloys
  • Crown Oil Partners VI/ BC Operating
  • Switchgrass E&P, LLC
  • UpCurve Energy
  • Linn Energy, LLC
  • Post Oak Minerals I
  • CPX Piceance, LLC
  • Crown Oil Partners IV/ BC Operating
  • Midway Energy Partners
  • Tri-C Energy Partners, LLC
  • EV Energy Partners
  • Bayou Well Services
  • Mavros Minerals II
  • Post Oak Minerals III
  • PetroEdge Energy III
  • Oryx Midstream Services II
  • Chaparral Energy
  • Richland-Stryker Generation, LLC
  • Breitburn Energy Partners L.P.
  • Permian Resources
  • Prime Downhole Manufacturing
  • Quantent Energy Partners, LLC
  • Broken Oak Investments LLC
  • Tiburon Oil & Gas Partners, LLC
  • Maverick Brothers Energy
  • Sierra EF, LP
  • Ichthys Energy Partners
  • Balcones Energy Holdings
  • Post Oak Minerals V
  • PetroEdge Energy IV
  • Moriah Henry Partners
  • Layne Water Midstream
  • Refinery Specialties, Inc.
  • SandRidge Energy, Inc.
  • Atlas Energy Resources, LLC
  • Double Eagle Energy Permian
  • Oryx Midstream Services
  • Black Oak Resources, LLC
  • Rimrock Resource Operating
  • Core Minerals Management II
  • Nadel and Gussman NV, LLC
  • UpCurve II

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