| 1 | A & I Properties Inc | Oklahoma City, OK 73107 | Gas Operator | Jun 2007 |
| 2 | Abundance Energy I LLC | Tulsa, OK 74114 | Gas Operator | Feb 2025 |
| 3 | Abundance Energy Services LLC | Tulsa, OK 74114 | Gas Operator | Mar 2025 |
| 4 | Antero Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 5 | Aquila Energy Resources Corp. | Houston, TX 77042 | Oil & Gas Operator | Nov 2013 |
| 6 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 7 | Blue Water Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2025 |
| 8 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 9 | Bravo Arkoma LLC | Tulsa, OK 74103-3100 | Oil & Gas Operator | Feb 2025 |
| 10 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 11 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 12 | Burlington Res Oil & Gas LP | Houston, TX 77079 | Oil & Gas Operator | Jan 2025 |
| 13 | Canyon Creek Energy Arkoma LLC | Tulsa, OK 74120-3017 | Oil & Gas Operator | Feb 2025 |
| 14 | Canyon Creek Energy Operating LLC | Tulsa, OK 74120 | Oil & Gas Operator | Feb 2025 |
| 15 | Castlerock Resources Inc | Oklahoma City, OK 73116-3710 | Oil & Gas Operator | Jul 2020 |
| 16 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2025 |
| 17 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 18 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 19 | D-Pex Operating Company | | Oil & Gas Operator | Sep 2004 |
| 20 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Mar 2025 |
| 21 | Energas Corporation | Oklahoma City, OK 73105 | Oil & Gas Operator | Feb 2025 |
| 22 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 23 | Eott Energy Corporation | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 1995 |
| 24 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 25 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 26 | Four North Inc | Atoka, OK 74525 | Oil Operator | Feb 2004 |
| 27 | G & S Energy, Inc. | Bangs, TX 76823 | Oil & Gas Operator | Apr 2024 |
| 28 | Gla Inc | Norman, OK 73070 | Oil & Gas Operator | Feb 2025 |
| 29 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 30 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 31 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 32 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2025 |
| 33 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 34 | Hunt Brothers Producing Co Inc | Redding, CA 96049-2516 | Oil & Gas Operator | Sep 2012 |
| 35 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 36 | Jones Energy LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2025 |
| 37 | Kal Energy Inc | Oklahoma City, OK 73116-3606 | Oil Operator | Nov 2014 |
| 38 | Longfellow Energy, LP | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 39 | Meade Energy Corporation | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Mar 2025 |
| 40 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 41 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 42 | Njre Operating Company | Tulsa, OK 74119 | Gas Operator | Dec 2016 |
| 43 | Ovintiv Mid-Continent Inc. | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Mar 2025 |
| 44 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Feb 2025 |
| 45 | Petro-Haley | Borger, TX 79008 | Oil & Gas Operator | May 2025 |
| 46 | Quench Oil & Gas Inc | Plano, TX 75075-2902 | Oil & Gas Operator | Apr 2009 |
| 47 | Riley Exploration Operating Co LLC | Blanchard, OK 73010-8024 | Gas Operator | Jun 2017 |
| 48 | Rockwall Marketing Corporation | Benbrook, TX 76126 | Oil & Gas Operator | Dec 2007 |
| 49 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 50 | Sedna Energy LLC | Blanchard, OK 73010-8043 | Gas Operator | Apr 2017 |
| 51 | Sellmeyer Frank | San Rafael, CA 94901-1339 | Oil Operator | Dec 2014 |
| 52 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 53 | Survivor Oil Inc | Tulsa, OK 74133 | Oil & Gas Operator | Sep 2007 |
| 54 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Mar 2025 |
| 55 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 56 | Trinity Operating (Usg), LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 57 | Vanguard Permian LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 58 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Feb 2025 |
| 59 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | May 2025 |
| 60 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Feb 2025 |
| 61 | Wheeler & Hanlin MFG Co Inc | Tulsa, OK 74148 | Oil Operator | Jun 1998 |
| 62 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 63 | Zinke & Trumbo LTD | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2017 |