| 1 | Arkana Operating Company Inc | Fort Worth, TX 76116-5707 | Oil & Gas Operator | Jul 2008 |
| 2 | Bay Oaks Resources LLC | | Gas Operator | Feb 2018 |
| 3 | Bowman & Cains Exploration, LLC | | Gas Operator | Sep 2020 |
| 4 | Chaparral Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Dec 2009 |
| 5 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 6 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 7 | Cross Timbers Operating Inc | | Gas Operator | Jul 2001 |
| 8 | Crow Creek Operating Co II LLC | Houston, TX 77252 | Oil & Gas Operator | Nov 2011 |
| 9 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | Jan 2024 |
| 10 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 11 | Fairview Production Company | Muldrow, OK 74948 | Oil & Gas Operator | Nov 2012 |
| 12 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | Feb 2024 |
| 13 | Flywheel Energy Production, LLC | Oklahoma City, OK 73102 | Gas Operator | Mar 2024 |
| 14 | Fort Exploration Company | FT Smith, AR 72901 | Gas Operator | May 2001 |
| 15 | Fort Operating Company | Fort Smith, AR 72923 | Gas Operator | Nov 2018 |
| 16 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 17 | Freedom Energy Inc | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Apr 2024 |
| 18 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Feb 2024 |
| 19 | High Plains Petroleum LLC | Bentonville, AR 72712 | Gas Operator | Jan 2024 |
| 20 | Hogback Exploration Inc | Fort Smith, AR 72916 | Oil & Gas Operator | Feb 2024 |
| 21 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2024 |
| 22 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2024 |
| 23 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2010 |
| 24 | KCS Resources, LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 25 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 26 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2024 |
| 27 | Max Extract Technologies, LLC | Oklahoma City, OK 73105 | Gas Operator | Dec 2023 |
| 28 | Merit Energy Company, LLC | Dallas, TX 75240 | Oil & Gas Operator | Jan 2024 |
| 29 | Mueller, Thomas C Inc | | Gas Operator | Dec 2004 |
| 30 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 31 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2017 |
| 32 | Oxley Energy LLC | Houston, TX 77042 | Gas Operator | Feb 2024 |
| 33 | Ozark Oil & Gas, Inc | | Gas Operator | May 2018 |
| 34 | Penn VIrginia MC Energy, LLC | Tulsa, OK 74119 | Gas Operator | Jul 2009 |
| 35 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 36 | Prosper Oil & Gas,Inc. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 37 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Jan 2024 |
| 38 | Riverfront Exploration LLC | Fort Smith, AR 72901 | Gas Operator | Feb 2024 |
| 39 | Rock Creek Energy, LLC | Fort Smith, AR 72901 | Gas Operator | Jan 2024 |
| 40 | Ross Explorations, Inc | Fort Smith, AR 72903 | Gas Operator | Jan 2024 |
| 41 | Sagely, Floyd E Properties, LTD | Fort Smith, AR 72917-0308 | Gas Operator | Jan 2015 |
| 42 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 43 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 44 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Apr 2024 |
| 45 | Sedna Energy, Inc | | Gas Operator | Nov 2011 |
| 46 | Seeco | | Gas Operator | Jul 2016 |
| 47 | Seeco, Inc. | | Gas Operator | Sep 2015 |
| 48 | Seeco, LLC | | Gas Operator | May 2019 |
| 49 | Shamrock Well Operations LLC | | Oil & Gas Operator | Feb 2024 |
| 50 | Shields Operating Inc | Fort Smith, AR 72901-3834 | Oil & Gas Operator | Oct 2021 |
| 51 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 52 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2024 |
| 53 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 54 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2021 |
| 55 | Vision Natural Resources, LP | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 56 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Apr 2024 |
| 57 | Williford Petroleum LLC | Green CV SPGS, FL 32043 | Oil & Gas Operator | Apr 2024 |
| 58 | Wytex Production Corporation | Fort Smith, AR 72903 | Oil & Gas Operator | Jan 2020 |
| 59 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 60 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |