| 1 | 101 Energy Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Jul 2025 |
| 2 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Jul 2025 |
| 3 | Abercrombie, A. L., Inc | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 4 | Abps Energy Inc | Chickasha, OK 73023-1658 | Oil & Gas Operator | Apr 2015 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 6 | Adparo LLC | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Jul 2025 |
| 7 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 8 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 9 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 10 | Amerac Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2013 |
| 11 | American Natural Energy Corp | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2025 |
| 12 | Amplify Oklahoma Operating LLC | Houston, TX 77002-4800 | Oil & Gas Operator | Jun 2025 |
| 13 | Amsler Jerry & Denese | Enid, OK 73703-9300 | Oil & Gas Operator | Jul 2020 |
| 14 | An-Son Corporation | Oklahoma City, OK 73124 | Oil & Gas Operator | Jan 2006 |
| 15 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 16 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 17 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 18 | Anderson Floyd Melton Revocable Trust | Yukon, OK 73099 | Oil & Gas Operator | Oct 2024 |
| 19 | Anderson T Maxwell | Tulsa, OK 74136-0653 | Oil & Gas Operator | Dec 2013 |
| 20 | Anderson, Carl T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2014 |
| 21 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 22 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Apr 2018 |
| 23 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 24 | Apache Energy Resources Corp | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 25 | Apc Operating Partnership LP | Tulsa, OK 74136-4224 | Oil & Gas Operator | Jun 2015 |
| 26 | Aquila Energy Resources Corp. | Houston, TX 77042 | Oil & Gas Operator | Nov 2013 |
| 27 | Arkoma Production Company | Shreveport, LA 71101 | Gas Operator | Apr 2020 |
| 28 | Armstrong Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Jul 2025 |
| 29 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Oct 2025 |
| 30 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 31 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 32 | Astro Corporation | Tulsa, OK 74145 | Oil & Gas Operator | Apr 2007 |
| 33 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 34 | Aven Gas & Oil Inc | Oklahoma City, OK 73113-0491 | Oil & Gas Operator | Nov 2021 |
| 35 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |
| 36 | B & H Oil Co. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 37 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Jul 2025 |
| 38 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 39 | Barrett Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 40 | Baruch-Foster Corporation | Oklahoma City, OK 73126-6770 | Oil & Gas Operator | Feb 2001 |
| 41 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 42 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 43 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2025 |
| 44 | Be Anadarko II, LLC | Austin, TX 78731 | Oil & Gas Operator | Oct 2025 |
| 45 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 46 | Bird Oil & Gas Inc | Yukon, OK 73099-2827 | Oil & Gas Operator | Jan 2023 |
| 47 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 48 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Oct 2025 |
| 49 | Blair Oil Company | Kingfisher, OK 73750-1213 | Oil & Gas Operator | Jun 2025 |
| 50 | Bluebonnet Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Jun 2025 |
| 51 | Bluebonnet Oil LLC | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Jul 2025 |
| 52 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 53 | Bo-MC Operating Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Mar 2018 |
| 54 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | May 2025 |
| 55 | Bogo Energy Corporation | Oklahoma City, OK 73134-1002 | Oil & Gas Operator | Jul 2025 |
| 56 | Boswell Energy Corp. | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 57 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 58 | BP Explorationinc/Ofb See #17756 | | Oil & Gas Operator | Apr 2015 |
| 59 | Bracken Energy Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2015 |
| 60 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Oct 2025 |
| 61 | Bradmar Petroleum Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 62 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 63 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 64 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 65 | Brent Baker Oil And Gas Inc | Oklahoma City, OK 73149-2932 | Oil & Gas Operator | Jul 2025 |
| 66 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 67 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 68 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 69 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 70 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 71 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 72 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 73 | Britt Oil Company LLC | Shawnee, OK 74801-9613 | Oil & Gas Operator | Jun 2025 |
| 74 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 75 | Burlington Oil Company | Ponca City, OK 74602-1304 | Oil & Gas Operator | May 2007 |
| 76 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 77 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 78 | Butler Petroleum Corp | Norman, OK 73069-7111 | Oil & Gas Operator | Dec 1998 |
| 79 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 80 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Oct 2025 |
| 81 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 82 | Caddo Exploration, LLC | Norman, OK 73072 | Oil & Gas Operator | Jul 2025 |
| 83 | Calebs Resources LLC | Edmond, OK 73012 | Oil & Gas Operator | Apr 2025 |
| 84 | Calpine Natural Gas Company L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 85 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 86 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Jul 2025 |
| 87 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | Jun 2025 |
| 88 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 89 | Carbon Economy LLC | Chickasha, OK 73023 | Oil & Gas Operator | Jul 2025 |
| 90 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 91 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jul 2025 |
| 92 | Cates Betty J | Tulsa, OK 74112 | Oil & Gas Operator | Nov 2016 |
| 93 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | Aug 2025 |
| 94 | Champion Reserves-Cri Inc | Oklahoma City, OK 73123 | Oil & Gas Operator | Jun 1994 |
| 95 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jul 2025 |
| 96 | Chapman Elise P Estate | | Oil & Gas Operator | Mar 2020 |
| 97 | Charter Oak Production Co LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 98 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 99 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 100 | Chizum Oil LLC | Wichita, KS 67211 | Oil & Gas Operator | Jun 2025 |