| 1 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Apr 2020 |
| 2 | Aguila Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 3 | Antara Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 2004 |
| 4 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 5 | Arrow Energy, Incorporated | Houston, TX 77008 | Oil & Gas Operator | Mar 2025 |
| 6 | Arrow Operating Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2024 |
| 7 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 8 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 9 | B-J Enterprises Inc | McAlester, OK 74501-7335 | Oil & Gas Operator | Apr 2014 |
| 10 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 11 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 12 | Belcor Inc. | Irvine, CA 92714 | Oil & Gas Operator | Nov 2000 |
| 13 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | May 2025 |
| 14 | Blackwell Exploration & Development LLC | Dallas, TX 75252-5637 | Oil & Gas Operator | Jan 2024 |
| 15 | Bravo Arkoma LLC | Tulsa, OK 74103-3100 | Oil & Gas Operator | Feb 2025 |
| 16 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 17 | Bullard Don W | Ardmore, OK 73401-3646 | Oil & Gas Operator | Dec 2019 |
| 18 | Calpine Natural Gas Company L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 19 | Camino Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 20 | Campbell B R | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2002 |
| 21 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 22 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2025 |
| 23 | Carlow Corp. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 24 | Chatham Verdell | Ratliff City, OK 73081-0061 | Oil Operator | Oct 2009 |
| 25 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2025 |
| 26 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 27 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 28 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 29 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 30 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 31 | Continental Exploration LLC | Lufkin, TX 75915 | Oil & Gas Operator | May 2025 |
| 32 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 33 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2025 |
| 34 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 35 | Crusader Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2011 |
| 36 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 37 | Daniels Corporation, The | Seabrook, TX 77586 | Oil & Gas Operator | May 2025 |
| 38 | Daniels Danny | Tishomingo, OK 73460-0853 | Oil Operator | Apr 2015 |
| 39 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | May 2025 |
| 40 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | Feb 2025 |
| 41 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Apr 2025 |
| 42 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | May 2025 |
| 43 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | May 2025 |
| 44 | First Ascent Operating LLC | Addison, TX 75001 | Oil Operator | Feb 2025 |
| 45 | Gemini Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 46 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 47 | Gladiator Operating LLC | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2025 |
| 48 | GLB Exploration, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 49 | Godfrey Oil Properties | Madill, OK 73446 | Oil & Gas Operator | Mar 2025 |
| 50 | Goggans William C | Pauls Valley, OK 73075-9759 | Oil & Gas Operator | Jun 2004 |
| 51 | Gray Operating Company, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2018 |
| 52 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 53 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2025 |
| 54 | Hancock Leon | Kingston, OK 73439-9618 | Oil Operator | Dec 2014 |
| 55 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 56 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 57 | Hutton Gas Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 58 | Jimmy R Chatham LLC | Healdton, OK 73438 | Oil & Gas Operator | Mar 2025 |
| 59 | Jones, L. E. Production Co. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2014 |
| 60 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2025 |
| 61 | Kentry Oil Company | Kingston, OK 73439 | Oil Operator | Aug 2002 |
| 62 | L & M Oil Co. | Yates Center, KS 66783 | Oil & Gas Operator | Dec 1998 |
| 63 | L E Jones Operating Inc | Duncan, OK 73534 | Oil & Gas Operator | Mar 2025 |
| 64 | Laurco Energies,Inc | | Oil & Gas Operator | Oct 2024 |
| 65 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Jan 2025 |
| 66 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | May 2025 |
| 67 | Malka Production Company | Oklahoma City, OK 73101-0248 | Oil & Gas Operator | Jan 2000 |
| 68 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 69 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 70 | Marshall Oil Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2017 |
| 71 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 72 | Mesa Operating LP | Irving, TX 75039-3746 | Oil & Gas Operator | Oct 2010 |
| 73 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2025 |
| 74 | Natural Gas Pipeline Co Of Am LLC | Downers Grove, IL 60515-3708 | Oil & Gas Operator | Mar 2015 |
| 75 | O'Neal, Lindell | Nocona, TX 76255 | Oil & Gas Operator | Mar 2025 |
| 76 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | May 2025 |
| 77 | Okmar Oil Company | Marietta, OH 45750 | Oil & Gas Operator | Jun 2005 |
| 78 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Jan 2025 |
| 79 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | May 2025 |
| 80 | Pogue Randall | Ada, OK 74821-1547 | Oil & Gas Operator | Apr 2014 |
| 81 | Prairiedale Energy Inc | Duncan, OK 73533-3657 | Oil & Gas Operator | Feb 2025 |
| 82 | Raad Investments LLC | Springer, OK 73458 | Oil & Gas Operator | Feb 2025 |
| 83 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 84 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2025 |
| 85 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103-4821 | Oil & Gas Operator | Mar 2025 |
| 86 | Red Wolf Operating LLC | Edmond, OK 73003-2179 | Oil & Gas Operator | Mar 2025 |
| 87 | Renfroe Lyndol | Wilson, OK 73463-6631 | Oil Operator | May 2020 |
| 88 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | May 2025 |
| 89 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 90 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 91 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 92 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 93 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 94 | Southern Oklahoma Production | Wilson, OK 73463-6537 | Oil Operator | Jan 2025 |
| 95 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Mar 2025 |
| 96 | Strike Energy Corporation | Blackwell, OK 74631 | Oil & Gas Operator | Jul 2023 |
| 97 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Feb 2025 |
| 98 | T & J Oil Production, L.L.C. | Lone Grove, OK 73443 | Oil & Gas Operator | Feb 2025 |
| 99 | T E F Inc | Madill, OK 73446-6656 | Oil & Gas Operator | Jul 2023 |
| 100 | T G & S Oil | Marietta, OK 73448 | Oil & Gas Operator | Mar 2025 |