| 1 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 2 | 4D'S Operating Co LLC (The) | Ratliff City, OK 73481 | Oil & Gas Operator | Apr 2025 |
| 3 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 4 | Aladdin Energy, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Feb 1999 |
| 5 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 6 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jul 2025 |
| 7 | Alvarado 2014 LLC | Houston, TX 77027 | Oil & Gas Operator | Jul 2025 |
| 8 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 9 | American Domestic MGMT Inc | Tulsa, OK 74155 | Oil & Gas Operator | Apr 2015 |
| 10 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 11 | Amplify Oklahoma Operating LLC | Houston, TX 77002-4800 | Oil & Gas Operator | Apr 2025 |
| 12 | Amsler Jerry & Denese | Enid, OK 73703-9300 | Oil & Gas Operator | Jul 2020 |
| 13 | An-Son Corporation | Oklahoma City, OK 73124 | Oil & Gas Operator | Jan 2006 |
| 14 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 15 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | May 2025 |
| 16 | Angel Exploration LLC | Oklahoma City, OK 73116-3603 | Oil & Gas Operator | May 2025 |
| 17 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 18 | Antioch Operating LLC | Dallas, TX 75206 | Oil & Gas Operator | May 2025 |
| 19 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 20 | Apollo Energies Inc | Pratt, KS 67124 | Oil & Gas Operator | May 2025 |
| 21 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 22 | Arkoma Operations LLC | Tulsa, OK 74114-3502 | Oil & Gas Operator | Apr 2025 |
| 23 | Arrington CJM, Inc. | Canadian, TX 79014 | Oil & Gas Operator | Nov 2021 |
| 24 | Arrington David Oil & Gas Inc | Midland, TX 79702-2071 | Oil & Gas Operator | Dec 2014 |
| 25 | Arvine Pipe & Supply Co Inc | Norman, OK 73069-8224 | Oil & Gas Operator | Jul 2015 |
| 26 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 27 | Atchley Resources, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 28 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2025 |
| 29 | Avalon Exploration Inc | Tulsa, OK 74119-5401 | Oil & Gas Operator | Dec 2019 |
| 30 | Axem Resources Inc | Denver, CO 80202-4617 | Oil & Gas Operator | Jul 2013 |
| 31 | B & F Enterprises | Ada, OK 74820 | Oil & Gas Operator | Feb 2002 |
| 32 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | May 2025 |
| 33 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 34 | Bannon Operating Inc | Houston, TX 77068 | Oil & Gas Operator | Sep 2003 |
| 35 | Barby Energy Corporation | Woodward, OK 73802-1660 | Oil & Gas Operator | Apr 2025 |
| 36 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 37 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 38 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2025 |
| 39 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 40 | Beasley Oil Company | Oklahoma City, OK 73120 | Oil & Gas Operator | Jun 2020 |
| 41 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 42 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 43 | Bell & Kinley Company LLC | Piedmont, OK 73078-8918 | Oil & Gas Operator | Jul 2021 |
| 44 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 45 | Below Ground Level LLC | Sand Springs, OK 74063 | Oil & Gas Operator | Jul 2025 |
| 46 | Beren Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 47 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Jul 2025 |
| 48 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 49 | Bird Creek Oil Company | Tulsa, OK 74126 | Oil & Gas Operator | Dec 2000 |
| 50 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 51 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jul 2025 |
| 52 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 53 | Blue Dolphin Production LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2025 |
| 54 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2025 |
| 55 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | Apr 2025 |
| 56 | Bogo Energy Corporation | Oklahoma City, OK 73134-1002 | Oil & Gas Operator | May 2025 |
| 57 | Bond Drilling Company | Marietta, OK 73448-0372 | Oil & Gas Operator | Apr 2017 |
| 58 | Boswell Energy Corp. | Oklahoma City, OK 73114-7401 | Oil & Gas Operator | Nov 2004 |
| 59 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 60 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 61 | Braxton Oil And Gas Corp. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2021 |
| 62 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 63 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 64 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 65 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 66 | Briscoe Oil Company | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Apr 2014 |
| 67 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 68 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 69 | Brittany Energy LLC | San Antonio, TX 78209 | Oil & Gas Operator | May 2019 |
| 70 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 71 | Bromar Oil Company | Fairview, OK 73737-0006 | Oil & Gas Operator | Apr 2014 |
| 72 | Brower, Robert C. | Fort Worth, TX 76116 | Oil & Gas Operator | Jul 2025 |
| 73 | Brunsteter Dick Oil & Gas Inc | Alva, OK 73717-0068 | Oil & Gas Operator | Jul 2006 |
| 74 | Buck Production Co LLC | Bristow, OK 74010 | Oil & Gas Operator | Sep 2023 |
| 75 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 76 | Burkhart Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2002 |
| 77 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Jul 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 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | May 2025 |
| 81 | C B Energy Resources | Bartlesville, OK 74006 | Oil & Gas Operator | Mar 2015 |
| 82 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 83 | Callie Oil Company LLC | Perry, OK 73077 | Oil & Gas Operator | May 2025 |
| 84 | Calvert Exploration Co | | Oil & Gas Operator | Apr 1993 |
| 85 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |
| 86 | Canard Colvert Operating LLC | Dallas, TX 75219-6243 | Oil & Gas Operator | May 2025 |
| 87 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | May 2025 |
| 88 | Capmac Inc | Tulsa, OK 74105-7119 | Oil & Gas Operator | Jan 2007 |
| 89 | Carl E Gungoll Exploration Inc | Oklahoma City, OK 73154-0466 | Oil & Gas Operator | Jan 2016 |
| 90 | Carl E Gungoll Exploration LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | May 2025 |
| 91 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 92 | Carmen Field LP | Tulsa, OK 74135 | Oil & Gas Operator | Mar 2008 |
| 93 | Carrera Energy LLC | Midland, TX 79704-5036 | Oil & Gas Operator | Apr 2025 |
| 94 | Cates Betty J | Tulsa, OK 74112 | Oil & Gas Operator | Nov 2016 |
| 95 | Chaco Energy Company | Denver, CO 80201 | Oil & Gas Operator | May 2025 |
| 96 | Challenge Operating Inc | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 97 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | May 2025 |
| 98 | Chermac Energy Corporation | Edmond, OK 73083 | Oil & Gas Operator | Apr 2020 |
| 99 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Jul 2025 |
| 100 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Jul 2025 |