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

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