| 1 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Mar 2025 |
| 2 | Abarr Trust (The) | Oklahoma City, OK 73179 | Oil & Gas Operator | Mar 2025 |
| 3 | Abercrombie, A. L., Inc | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 4 | Agricultural Energy Services Inc | Edmond, OK 73012 | Oil Operator | Feb 2025 |
| 5 | Aikman Brothers | Midland, TX 79705 | Oil & Gas Operator | Dec 2000 |
| 6 | American Star Energy & Mineral Corp | Amarillo, TX 79102-2283 | Oil & Gas Operator | Jun 2015 |
| 7 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Mar 2025 |
| 8 | Anderson Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2015 |
| 9 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 10 | Apx Corporation | Houston, TX 77251 | Oil & Gas Operator | Dec 2009 |
| 11 | Arena Resources Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 12 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 13 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 14 | Athena Energy, Inc. | Gallatin, TN 37066 | Oil & Gas Operator | May 2025 |
| 15 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 16 | Aycox Robert D | Healdton, OK 73438 | Oil Operator | Sep 2022 |
| 17 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | May 2025 |
| 18 | Bateman'S Bay Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Mar 2025 |
| 19 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 20 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 21 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 22 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 23 | Bledsoe Petro Corporation | Dallas, TX 75201 | Oil & Gas Operator | Dec 2000 |
| 24 | Boone And Boone Oil Co | Perry, OK 73077 | Oil & Gas Operator | Mar 2008 |
| 25 | Boswell Energy Corp. | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 26 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 27 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | May 2025 |
| 28 | Bracksieck Lloyd H | Boulder, CO 80303 | Oil & Gas Operator | Feb 2019 |
| 29 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 30 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2025 |
| 31 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 32 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 33 | Brown Brothers | Texhoma, OK 73949 | Oil & Gas Operator | Feb 2025 |
| 34 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 35 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 36 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 37 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 38 | C & R Petroleum Co. | Duncan, OK 73533-1341 | Oil & Gas Operator | Feb 2025 |
| 39 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 40 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 41 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Mar 2025 |
| 42 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Mar 2025 |
| 43 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2025 |
| 44 | Cholla Production LLC | Littleton, CO 80127 | Oil & Gas Operator | Jan 2025 |
| 45 | Cig Resources Company | Colorado Spring, CO 80944-1087 | Oil & Gas Operator | Jun 2018 |
| 46 | Cimarron Operating Company | Oklahoma City, OK 73112-3967 | Oil & Gas Operator | May 2011 |
| 47 | Cleary Exploration LLC | Oklahoma City, OK 73112-7221 | Oil & Gas Operator | Oct 2014 |
| 48 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 49 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 50 | Colorado Interstate Gas Co | Colorado Springs, CO 80944 | Oil & Gas Operator | Jul 2004 |
| 51 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 52 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | May 2025 |
| 53 | Cook Robert L | Rockwall, TX 75087-0892 | Oil & Gas Operator | Mar 2015 |
| 54 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 55 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2025 |
| 56 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 57 | Crouch Petroleum Company | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2015 |
| 58 | Csoda Operating Company LLC | Amarillo, TX 79114-7506 | Oil & Gas Operator | Aug 2021 |
| 59 | D & S Operating | Texhoma, OK 73949 | Oil & Gas Operator | May 2001 |
| 60 | Dab Limited | Oklahoma City, OK 73116-9082 | Oil & Gas Operator | Aug 2013 |
| 61 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2025 |
| 62 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Feb 2025 |
| 63 | Deaton, Gary L. Corporation | Oklahoma City, OK 73105 | Oil & Gas Operator | Mar 2015 |
| 64 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 65 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 66 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 67 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 68 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 69 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 70 | E R Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 71 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 72 | Edinger Engineering, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 73 | Elite Resources Inc | Cleveland, OK 74020 | Oil & Gas Operator | Mar 2025 |
| 74 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Mar 2025 |
| 75 | Emc Exploration Company Inc | Oklahoma City, OK 73103-3775 | Oil & Gas Operator | Jul 2007 |
| 76 | Energy Operations Oklahoma LP | Houston, TX 77002-6785 | Oil & Gas Operator | Nov 2010 |
| 77 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 78 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 79 | EOG Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 80 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | May 2022 |
| 81 | Exoko Operating Company Inc | Tulsa, OK 74170-0246 | Oil & Gas Operator | Jan 2006 |
| 82 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 83 | Farris Well Service LLC | Liberal, KS 67901-5644 | Oil & Gas Operator | Jul 2016 |
| 84 | Faulconer Vernon E Inc | Tyler, TX 75711 | Oil & Gas Operator | Mar 2025 |
| 85 | First National Oil, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Feb 2025 |
| 86 | Fossil Creek Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2025 |
| 87 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 88 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Feb 2025 |
| 89 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 90 | Genesis Inc | Seminole, OK 74818-1647 | Oil & Gas Operator | Sep 2014 |
| 91 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 92 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 93 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 94 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 95 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 96 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 97 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 98 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | May 2025 |
| 99 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | Mar 2025 |
| 100 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Oct 2019 |