| 1 | 101 Energy Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Apr 2025 |
| 2 | 3tec Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 3 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | May 2025 |
| 4 | A J S Oil Corporation | Oklahoma City, OK 73112-4799 | Oil & Gas Operator | Jul 2004 |
| 5 | Abarr Trust (The) | Oklahoma City, OK 73179 | Oil & Gas Operator | May 2025 |
| 6 | Abps Energy Inc | Chickasha, OK 73023-1658 | Oil & Gas Operator | Apr 2015 |
| 7 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Jul 2025 |
| 8 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 9 | Ac Oil & Gas LLC | Hennessey, OK 73742 | Oil & Gas Operator | May 2025 |
| 10 | Adams Res & Energy Co | Houston, TX 77001-0844 | Oil & Gas Operator | Mar 2015 |
| 11 | Adobe Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 12 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 13 | Agent Oil Corporation | Bison, OK 73720-0116 | Oil & Gas Operator | Mar 2005 |
| 14 | Alameda Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 1994 |
| 15 | Aleco Production Company | | Oil & Gas Operator | Nov 1997 |
| 16 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 17 | Allenergy Operating Co Inc | Coffeyville, KS 67337-6653 | Oil & Gas Operator | Mar 2015 |
| 18 | Almont Energy LLC | Kingfisher, OK 73750-0901 | Oil & Gas Operator | Oct 2021 |
| 19 | Alpar Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2011 |
| 20 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jul 2025 |
| 21 | Alvarado 2014 LLC | Houston, TX 77027 | Oil & Gas Operator | Jul 2025 |
| 22 | American Natural Energy Corp | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2025 |
| 23 | Amsler Jerry & Denese | Enid, OK 73703-9300 | Oil & Gas Operator | Jul 2020 |
| 24 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Jul 2025 |
| 25 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 26 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | May 2025 |
| 27 | Anchorage Oil & Gas Inc | Oklahoma City, OK 73128-1422 | Oil & Gas Operator | Oct 1999 |
| 28 | Anderson Oil & Gas Account | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2013 |
| 29 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 30 | Antioch Operating LLC | Dallas, TX 75206 | Oil & Gas Operator | May 2025 |
| 31 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 32 | Apache Energy Resources Corp | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 33 | Apex Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 1994 |
| 34 | Aquila Energy Resources Corp. | Houston, TX 77042 | Oil & Gas Operator | Nov 2013 |
| 35 | Arapaho Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Nov 1998 |
| 36 | Arcotex Oil & Gas Inc | Gainesville, TX 76241-1357 | Oil & Gas Operator | May 2025 |
| 37 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Jul 2025 |
| 38 | Arkoma Production Company | Shreveport, LA 71101 | Gas Operator | Apr 2020 |
| 39 | Arkoma Resources LLC | Henryetta, OK 74437 | Oil & Gas Operator | Apr 2025 |
| 40 | Armor Energy II LLC | Tulsa, OK 74145 | Oil & Gas Operator | May 2025 |
| 41 | Armor Energy LLC | Tulsa, OK 74146 | Oil & Gas Operator | Jun 2022 |
| 42 | Arpel, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2014 |
| 43 | Arrington David Oil & Gas Inc | Midland, TX 79702-2071 | Oil & Gas Operator | Dec 2014 |
| 44 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Jul 2025 |
| 45 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 46 | Arvine Pipe & Supply Co Inc | Norman, OK 73069-8224 | Oil & Gas Operator | Jul 2015 |
| 47 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 48 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Jul 2025 |
| 49 | Atchley Resources, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 50 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 51 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 52 | Austin Production Company, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Mar 2015 |
| 53 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jul 2025 |
| 54 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Jul 2025 |
| 55 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 56 | Balco Energy Inc | Duncan, OK 73533 | Oil & Gas Operator | May 2025 |
| 57 | Barbour Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Jul 2025 |
| 58 | Barby Energy Corporation | Woodward, OK 73802-1660 | Oil & Gas Operator | Apr 2025 |
| 59 | Baruch-Foster Corporation | Oklahoma City, OK 73126-6770 | Oil & Gas Operator | Feb 2001 |
| 60 | Baseline Operating, LLC | Edmond, OK 73013-0000 | Oil & Gas Operator | Apr 2025 |
| 61 | Bateman'S Bay Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Apr 2025 |
| 62 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2025 |
| 63 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2025 |
| 64 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2025 |
| 65 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 66 | Beasley Oil Company | Oklahoma City, OK 73120 | Oil & Gas Operator | Jun 2020 |
| 67 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 68 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2025 |
| 69 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 70 | Bell & Kinley Company LLC | Piedmont, OK 73078-8918 | Oil & Gas Operator | Jul 2021 |
| 71 | Bench Oil | Duncan, OK 73533 | Oil Operator | Apr 2014 |
| 72 | Bentley & Laing | Wichita Falls, TX 76302 | Oil & Gas Operator | Feb 2002 |
| 73 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 74 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 75 | Big Creek Energy LLC | Kingfisher, OK 73750-3102 | Oil & Gas Operator | May 2025 |
| 76 | Big Four Petroleum Company | Cushing, OK 74023 | Oil & Gas Operator | Nov 2004 |
| 77 | Big Sky Oil Company | Nowata, OK 74048-0187 | Oil & Gas Operator | Mar 2015 |
| 78 | Bison Energy Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2022 |
| 79 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 80 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jul 2025 |
| 81 | Blaik Oil Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2009 |
| 82 | Blair Oil Company | Kingfisher, OK 73750-1213 | Oil & Gas Operator | May 2025 |
| 83 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 84 | Blue Dolphin Production LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | May 2025 |
| 85 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Jul 2025 |
| 86 | Bluebonnet Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Apr 2025 |
| 87 | Bluebonnet Oil LLC | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | May 2025 |
| 88 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2025 |
| 89 | Bluff LTD (The) Partnership | Woodward, OK 73801-3160 | Oil Operator | Dec 1999 |
| 90 | BMW Group Inc (The) | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2013 |
| 91 | Bo-MC Operating Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Mar 2018 |
| 92 | Bo-MC Resources Corporation | Enid, OK 73702-1765 | Oil & Gas Operator | Apr 2005 |
| 93 | Bob & Son Oil Company | Hennessey, OK 73742-0578 | Oil & Gas Operator | Jul 2017 |
| 94 | Bobwhite Production Company, Inc | Tulsa, OK 74112 | Oil & Gas Operator | Apr 2025 |
| 95 | Bode Public Disposal Inc | Ames, OK 73718 | Oil Operator | Dec 1994 |
| 96 | Bogo Energy Corporation | Oklahoma City, OK 73134-1002 | Oil & Gas Operator | May 2025 |
| 97 | Box Energy Company | Dallas, TX 75244 | Oil & Gas Operator | Jun 2003 |
| 98 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 99 | BPC Creditors Trust | Oklahoma City, OK 73102-8606 | Oil & Gas Operator | Jun 1998 |
| 100 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2025 |