• Skip to main content
  • Skip to header right navigation
  • Skip to site footer
Post Oak Energy Capital Logo

Post Oak Energy Capital - Private Equity

  • Home
  • Portfolio
    • Current Investments
    • Realized Investments
    • Post Oak Minerals
  • About Us
  • Press Releases
  • Contact Us
Post Oak Minerals Logo

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

COPYRIGHT © 2022 POST OAK ENERGY CAPITAL · 34 S. WYNDEN DR, SUITE 300, HOUSTON, TEXAS 77056 · 713.571.9393 | INVESTOR LOGIN