| 1 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Jan 2024 |
| 2 | American Petroleum Corp | Addison, TX 75001 | Oil & Gas Operator | Apr 2024 |
| 3 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Apr 2024 |
| 4 | B & B SWD LLC | | Oil Operator | Jan 2024 |
| 5 | Bluff LTD (The) Partnership | Woodward, OK 73801-3160 | Oil Operator | Dec 1999 |
| 6 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Jan 2024 |
| 7 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Jan 2024 |
| 8 | Capstone Oilfield Disposal Service LLC | Hennessey, OK 73742-0698 | Oil Operator | Dec 2019 |
| 9 | Central Ok Reclamation LLC | | Oil & Gas Operator | Jun 2014 |
| 10 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 11 | Co-St Oil Operating Co Inc | Enid, OK 73706 | Oil & Gas Operator | Apr 1997 |
| 12 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Apr 2024 |
| 13 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 14 | D & B Operating LLC | | Oil Operator | Jan 2023 |
| 15 | Daco, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2024 |
| 16 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 17 | Femco SWD Inc | Enid, OK 73702-3907 | Oil Operator | Mar 2014 |
| 18 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Apr 2024 |
| 19 | Geo Engineering Inc | Houston, TX 77027 | Oil & Gas Operator | Jun 2009 |
| 20 | Green Valley Disposal Serv LLC | Waynoka, OK 73860-0194 | Oil Operator | Dec 2023 |
| 21 | H2ox Operating LLC | | Oil Operator | Jan 2024 |
| 22 | Ham Oil Company, LLC | | Oil Operator | Sep 2022 |
| 23 | Heartlands Development Co Inc | Bristow, OK 74010-3826 | Oil & Gas Operator | May 2017 |
| 24 | High Sierra Crude Oil& Marketing LLC | Ardmore, OK 73401 | Oil Operator | Nov 2013 |
| 25 | Hy-Carb Energy Inc | | Oil & Gas Operator | Feb 2009 |
| 26 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 27 | Kybenco Disposals LLC | | Oil Operator | Sep 2022 |
| 28 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 29 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 30 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Dec 2023 |
| 31 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Apr 2024 |
| 32 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 33 | LX4 LLC | | Oil Operator | Jan 2024 |
| 34 | Mac Laskey Kelly Oilfield | El Dorado, KS 67042 | Oil & Gas Operator | Jan 2024 |
| 35 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 36 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 37 | Moore Richard L | Morris, OK 74445 | Oil Operator | Aug 2013 |
| 38 | Mud Operations Inc | Ames, OK 73718-9501 | Oil & Gas Operator | Jan 2024 |
| 39 | Nelson Exploration Corporation | | Oil & Gas Operator | Dec 2023 |
| 40 | Nemaha Environmental Services LLC | Enid, OK 73703 | Oil Operator | Dec 2023 |
| 41 | Oklahoma Liquid Resources Inc | Owasso, OK 74055-0841 | Oil & Gas Operator | Dec 2023 |
| 42 | Oklahoma Petroleum Allies LLC | Ardmore, OK 73401 | Oil Operator | Oct 2023 |
| 43 | Paramount Petroleum Corp | Dallas, TX 75374 | Oil Operator | Dec 2000 |
| 44 | PBT Enterprises Inc | Garber, OK 73738-0262 | Oil & Gas Operator | May 2023 |
| 45 | Perry L Larson Operating Co | Dallas, TX 75231-4712 | Oil & Gas Operator | Dec 2023 |
| 46 | Proven Reserves Management, Inc. | Dallas, TX 75370 | Oil & Gas Operator | Jan 2024 |
| 47 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jan 2024 |
| 48 | Red Hawk Disposal LLC | | Oil Operator | Jun 2023 |
| 49 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 50 | Salty Dog Disposal LLC | | Oil Operator | Feb 2024 |
| 51 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Jan 2024 |
| 52 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 53 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 54 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 55 | Tiger Trucks Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2024 |
| 56 | Tonys Crude Oil Reclaiming Plant Inc | | Oil Operator | Dec 2023 |
| 57 | Triple C Properties Inc | Seminole, OK 74818-0481 | Oil & Gas Operator | Jun 2023 |
| 58 | Trout Disposal Well Inc | Hammon, OK 73650-0292 | Oil & Gas Operator | Jul 2016 |
| 59 | W S Crude Oil Purchasing Inc | Oklahoma City, OK 73129-7613 | Oil & Gas Operator | May 2008 |
| 60 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Jan 2024 |
| 61 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 62 | Woodward Iodine Corporation | Woodward, OK 73802-1245 | Oil & Gas Operator | Jan 2024 |
| 63 | Zimet Brothers Inc | | Oil Operator | Mar 2008 |