Chesapeake Energy (CHK)

1. Organization

Columbia Energy Resources, LLC, a Delaware limited liability company (CER or the Company), was formed on August 27, 2003, and is a wholly owned subsidiary of Triana Energy Holdings, LLC (TEH). CER owns Columbia Natural Resources, LLC (CNR), the primary exploration and production subsidiary in the United States, Columbia Natural Resources Canada, Ltd. (CNRC), with holdings in Canada, Hawg Hauling and Disposal, LLC (Hawg), which conducts brine hauling and disposal services, Triana Energy Leases, Inc. (TEL), an entity formed to participate in operations on government leases, and the former Alamco-Delaware, LLC (Aladel), an entity formed to participate in monetization of investment tax credits.

1. Organization

Columbia Energy Resources, LLC, a Delaware limited liability company (CER or the Company), was formed on August 27, 2003, and is a wholly owned subsidiary of Triana Energy Holdings, LLC (TEH). On September 1, 2003, TEH acquired Columbia Energy Resources, Inc. through a separate LLC (Acquisition LLC) formed to facilitate the acquisition of Columbia Energy Resources, Inc., previously a wholly owned subsidiary of Columbia Energy Group, a registered holding company under the Public Utility Holding Company Act of 1935 and a wholly owned subsidiary of Nisource, Inc. Simultaneously, TEH caused the net assets acquired to be contributed to the Company by merging Acquisition LLC with the Company.

Columbia owns Columbia Natural Resources, LLC (CNR), the primary exploration and production subsidiary in the United States, Columbia Natural Resources Canada, Ltd. (CNRC), with holdings in Canada, Hawg Hauling and Disposal, LLC (Hawg), which conducts brine hauling and disposal services, Alamco-Delaware, LLC (Aladel), an entity formed to participate in monetization of investment tax credits, and Triana Energy Leases, Inc. (TEL), an entity formed to participate in operations on government leases.