​Marcellus (Mitsui E&P USA LLC)

  • Chesapeake Energy Corporation – Operating partner of Mitsui's Marcellus leases in Pennsylvania through its subsidiary Chesapeake Appalachia LLC.

  • Statoil – Non-operating partner in Chesapeake-operated Marcellus leases through its subsidiary, Statoil USA Onshore Properties Inc.

  • Alta Energy, L.P. – Non-operating partner in Chesapeake-operated Marcellus leases.

  • Williams Partners L.P – Operating partner of Midstream business JV in our Chesapeake-operated Marcellus lease areas.

  • Other operating partners under JOAs, such as Chief Oil & Gas LLC,  Southwestern Energy Production Company, Seneca Resources Corporation, Repsol Oil & Gas USA, LLC, Diversified Energy LLC,  and Warren Resources.

​Eagle Ford (MEP E&P Texas LP)

  • Mesquite Energy Inc. (formerly Sanchez Energy Corporation) – Operating partner of all of Mitsui's Eagle Ford leases in South Texas through its subsidiary, SN EF Maverick, LLC.

  • Blackstone Energy Partners – Non-operating partner in the Sanchez-operated Eagle Ford leases through its subsidiary, Gavilan Resources LLC. 

  • Venado EF L.P. – An affiliate of KKR and non-operating partner.

  • Korean National Oil Company – Non-operating partner through its affiliate Eagle Ford TX LP.

  • Western Gas Partners – Operating partner of Midstream business JV in our Eagle Ford acreage through its subsidiary, Springfield Pipeline LLC.

Kaikias (MOEX North America LLC)

  • Shell – Operating partner in the Kaikias Project in the US Gulf of Mexico with MOEX North America LLC (MOEX NA), which is a wholly owned subsidiary of Mitsui Oil Exploration Co. Ltd.