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

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