| 1 | Analena Corporation | Dallas, TX 75251 | Oil Operator | Jun 2000 |
| 2 | Arkla Energy Resources | Shreveport, LA 71151 | Oil & Gas Operator | Mar 2015 |
| 3 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 4 | Bryant Expl And Prod Co Inc | Elk City, OK 73648-0827 | Oil & Gas Operator | Apr 2014 |
| 5 | Burchfield Margaret S Dba Nu-Hope Oil Company | Earlsboro, OK 74840 | Oil & Gas Operator | Dec 2024 |
| 6 | Burlington Res Oil & Gas LP | Houston, TX 77079 | Oil & Gas Operator | Nov 2024 |
| 7 | Butler B F | Hobart, OK 73651 | Oil Operator | Apr 2014 |
| 8 | Cimarex Energy Co Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 9 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 10 | Collins Dillard Dba Dilco Oil Company | Mangum, OK 73554-4029 | Oil & Gas Operator | Mar 2024 |
| 11 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 12 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Mar 2025 |
| 13 | El Paso Natural Gas Company | El Paso, TX 79978 | Oil & Gas Operator | Apr 2013 |
| 14 | Elm Fork Gas Pipeline Inc | Shamrock, TX 79079-0606 | Gas Operator | Jan 2000 |
| 15 | Enable Gas Transmission LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 16 | Gas Recovery Systems Inc | | Oil & Gas Operator | Aug 2013 |
| 17 | Greer & Beckham Gas Co Inc | Shamrock, TX 79079-0606 | Oil & Gas Operator | Aug 2013 |
| 18 | Hagler William N | Farmington, NM 87499-0035 | Oil Operator | Apr 2014 |
| 19 | Harlow Corporation, The | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2014 |
| 20 | Jec Operating LLC | Oklahoma City, OK 73114-2717 | Oil & Gas Operator | Dec 2024 |
| 21 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Mar 2025 |
| 22 | Kay Production Company Inc | Seminole, OK 74868 | Oil & Gas Operator | Dec 2024 |
| 23 | Landers Production Company | Granite, OK 73547-0093 | Oil Operator | Apr 2014 |
| 24 | Lar-Mie Petroleum Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1998 |
| 25 | Marion Energy Inc | Houston, TX 770082292 | Oil & Gas Operator | May 2015 |
| 26 | Medina-Pierce Oil & Gas Co | | Oil & Gas Operator | Feb 2012 |
| 27 | Mep Operating LLC | Houston, TX 77056-2733 | Oil & Gas Operator | Dec 2024 |
| 28 | Ole Crow Operating | Wichita Falls, TX 76308 | Oil Operator | Dec 2024 |
| 29 | Pruitt Operating Company LLC | Ratliff City, OK 73481-5802 | Oil & Gas Operator | Jan 2025 |
| 30 | Rimrock Gas Company | Weatherford, OK 73096 | Oil & Gas Operator | May 2008 |
| 31 | Riverstone Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Jan 2025 |
| 32 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Mar 2025 |
| 33 | SLT Dakota Operating, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Mar 2025 |
| 34 | Triple "S" Gas, Inc. | Dallas, TX 75355 | Oil & Gas Operator | Mar 2025 |
| 35 | Trissell Alva Lee | Willow, OK 73673-9602 | Oil Operator | Apr 2020 |
| 36 | Wildcat Cement Co. | Shamrock, TX 79079 | Oil & Gas Operator | May 2015 |
| 37 | Willow Pipeline Company | Wetherford, OK 73096 | Oil & Gas Operator | Feb 2002 |