| Kerr-McGee Rocky Mountain Corporation | United States |
Private
|
| Kestrel Energy, Inc. | United States |
Private
|
| Key Production Company, Inc. | United States |
Private
|
| Keyspan Gas East Corporation | United States |
Private
|
| KFG Resources Ltd. | United States |
Private
|
| Kick Energy Corporation | Canada |
Private
|
| Kina Petroleum Corporation | Australia |
Private
|
| Kinder Morgan G.P., Inc. | United States |
Private
|
| Koch Resources, LLC | United States |
Private
|
| Korea National Oil Corporation | South Korea |
Private
|
| Kreuz Holdings Limited | Singapore |
Private
|
| Kuwait Energy PLC | Jersey |
Private
|
| Kuwait Petroleum Corporation | Kuwait |
Private
|
| Kvaerner ASA (new) | Norway |
Private
|
| L&M Energy Limited | New Zealand |
Private
|
| Lamprell plc | United Arab Emirates |
Private
|
| Landis Energy Corp | Canada |
Private
|
| Lands End Resources Ltd. | Canada |
Private
|
| LaPolla Industries Inc. | United States |
Private
|
| Lassen Municipal Utility District | United States |
Private
|
| LB Pacific L.P. | United States |
Private
|
| LBC Houston LP | United States |
Private
|
| Leader Energy Services Ltd. | Canada |
Private
|
| Legacy Oil + Gas Inc | Canada |
Private
|
| Legacy Reserves Finance Corp | United States |
Private
|
| Legacy Reserves LP | United States |
Private
|
| Leucrotta Exploration Inc. | Canada |
Private
|
| Liberty Petroleum Corp. | United States |
Private
|
| Lightstream Resources Ltd | Canada |
Private
|
| LION OIL COMPANY, LLC | United States |
Private
|
| LL&E Capital II | United States |
Private
|
| Locap LLC | United States |
Private
|
| Lochard Energy Group Limited | Australia |
Private
|
| Logan International Inc | Canada |
Private
|
| Lone Pine Resources Inc. | Canada |
Private
|
| Lonestar Resources Us Inc | United States |
Private
|
| Lonestar West Inc. | Canada |
Private
|
| Longview Oil Corp | Canada |
Private
|
| Longyear Holdings Inc. | United States |
Private
|
| LOOP LLC | United States |
Private
|
| Louisiana Gas Service Co. | United States |
Private
|
| Louisiana Land & Exploration Co LLC/The | United States |
Private
|
| Louisiana Oil and Gas Plc | United Kingdom |
Private
|
| Lower Alabama Gas District | United States |
Private
|
| LRR Energy, L.P. | United States |
Private
|
| Lubbock Power & Light | United States |
Private
|
| LYB Australia Limited | Australia |
Private
|
| Lynden Energy Corp. | Canada |
Private
|
| Lyondell Chemical Company | United States |
Private
|
| M-I LLC | United States |
Private
|
| M3nergy Bhd | Malaysia |
Private
|
| Madagascar Oil Ltd | Madagascar |
Private
|
| Madalena Petroleum Ltd. | Canada |
Private
|
| Madrilena Red de Gas II, S.A.U. | Spain |
Private
|
| Madrilena Red de Gas S.A.U. | Spain |
Private
|
| Magnolia Petroleum PLC | United Kingdom |
Private
|
| Magnolia Pipeline Company, Llc | United States |
Private
|
| Magnum Energy, Inc. | Canada |
Private
|
| Mahalo Energy Ltd. | Canada |
Private
|
| Mainland Resources Inc. | United States |
Private
|
| Mainline LP | United States |
Private
|
| Mapan Energy Ltd | Canada |
Private
|
| MAPCO LLC | United States |
Private
|
| MAPCO Petroleum Inc. | United States |
Private
|
| Maple Energy plc | Peru |
Private
|
| Marathon Oil Canada Corporation | Canada |
Private
|
| Marauder Resources East Coast Inc. | Canada |
Private
|
| MARIJUANA STRATEGIC VENTURES INC | United States |
Private
|
| Marine Drilling Companies, Inc. | United States |
Private
|
| Mariner Energy Inc. | United States |
Private
|
| Maritime Industrial Services Co Ltd Inc | United Arab Emirates |
Private
|
| Maritimes & Northeast Pipeline, LLC | United States |
Private
|
| MarkWest Energy Finance Corp | United States |
Private
|
| MarkWest Hydrocarbon, L.L.C | United States |
Private
|
| Marquard & Bahls AG | Germany |
Private
|
| Marquee Petroleum Ltd. | Canada |
Private
|
| Mart Resources Inc. | Canada |
Private
|
| Masters Energy Inc | Canada |
Private
|
| Maverick Minerals Corporation | Canada |
Private
|
| MAVERICK NATURAL RESOURCES LLC | United States |
Private
|
| Max Petroleum PLC | United Kingdom |
Private
|
| Maxum Petroleum Operating Company LLC | United States |
Private
|
| Maxus Energy Corporation | United States |
Private
|
| Mayank Cattle Food Limited | India |
Private
|
| MB Petroleum Services LLC | Oman |
Private
|
| McGraw-Hill Ryerson Limited | Canada |
Private
|
| McMoRan Oil & Gas | United States |
Private
|
| MCN Energy Enterprises Inc | United States |
Private
|
| Medanito S.A. | Argentina |
Private
|
| Memorial Resource Development LLC | United States |
Private
|
| Mercury Air Group, Inc. | United States |
Private
|
| Merey Sweeny, L.P. | United States |
Private
|
| Meridian Resource Corporation | United States |
Private
|
| Merrill Lynch Commodities Inc | United States |
Private
|
| Mesa Petroleum Co. | United States |
Private
|
| Mesa, Incorporated | United States |
Private
|
| Metropolitan Utilities District of Omaha | United States |
Private
|
| MFC Energy Corp | Canada |
Private
|
| MGF Oil Corp | United States |
Private
|
| Michael Petroleum Corporation | United States |
Private
|
|
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