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

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