Operator List: M

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M & D Oil and Gas, LLC M & D Oil Co, a General Partnership M & M Exploration, Inc. M & M Oil Company M & M Well Service, LLC M & O Oil Co.a General Partnership M & S Energy, LLC M E Klein & Associates, Inc M G Oil Inc M S Drilling Company M&M Services LLC M. J. T. Enterprises M. K. Fuhrman LLC M.A. Yost Operations, Inc Macy Resources, LLC Mai Oil Operations, Inc. Manbeck, Mark Manning, Gregory Manns' ATP, Inc. Manuel Corporation Mar-Lou Oil Co., LLC Marathon Oil Company March Exploration LLC MARCO Oil Company LLC Marden Producing Company Marexco, Inc. Mark Oil, Inc. Marsh Operating Company Marshall Oil, LLC Martin Oil LLC Martin, Dail D. Massey, Gary R. Matador, Inc. Maverick Oil Co. Max Oil LLC MaxCrude, LLC Mayhew Properties MAYS OIL LLC MB Holdings LLC McConnell Oil Properties

McCorgary Operations McCoy Petroleum Corporation McCoy, Jon McFadden Oil Co. McGinness Energy Company, Inc. McGinness Oil Company McGown Drilling, Inc. McGrath, Rollie McMillan, L.L.C. McMullin, Douglas McNeish Oil Operations McNown, Carl H. MDopps, LLC Melton, Kenneth MEM Partnership LP, a General Partnership Merica Oil Operating Company LLC Meridian Energy Inc. Merit Energy Company, LLC Merrick Oil & Gas Messenger Petroleum, Inc. Messman Corporation Mewbourne Oil Company Meyer, Theodore J. Michael D. Traylor LLC Michael D. Weilert Oil Company Micro Oil, LLC Mid Kansas Gas Gathering Mid Region Energy LLC Mid-Continent Energy Corp. Mid-Continent Energy Operating Co. Mid-Continent Resources, Inc. Midco Exploration, Inc. Midnight Energy Operating LLC Midstates Energy Operating, LLC Midwest Oil, LLC Midwestern Exploration Company Mike Blaes & Peggy Blaes, a General Partnership Mike Kelso Oil, Inc. Mikol Oil LLC Miller Energy, LLC

Miller Oil Company, LLC Miller Oil Property Miller, Robert A. Miller-Becker Enterprises, LLC Mitchell, Terri L. MJT Oil MKJ Oil Co LLC MLT Energy, LLC Mohr, Steve Molitor Oil, Inc. Molz Oil Company Monarch Energy LLC Monarch Petroleum Corporation Montgomery Production & Operating LLC Moran Oil Enterprises, LLC Morgenstern Oil Operations LLC Morris Oil Operations Morrison, Mark L. Moss Petroleum Company Moyer, Terry MSG Resources Inc. MSP Oil, LLC MTM Petroleum, Inc. Mueller Oil Mueller, Susan Mull Drilling Company, Inc. Murfin Drilling Co., Inc. Murjo Oil & Royalty Company Murphy, Charles H. Murray Oil and Gas LLC Musgrove Energy Inc. Mustang Energy Corporation Mustang Oil and Gas Corp. MW Oil, Inc MWK Petroleum, LLC Myers Drilling and Exploration Inc.