| 1 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Jul 2025 |
| 2 | A R W Exploration Corp | Stillwater, OK 74076 | Oil & Gas Operator | May 2013 |
| 3 | Abarr Trust (The) | Oklahoma City, OK 73179 | Oil & Gas Operator | Jul 2025 |
| 4 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 5 | Adams Res & Energy Co | Houston, TX 77001-0844 | Oil & Gas Operator | Mar 2015 |
| 6 | Adobe Resources Corporation | Midland, TX 79701 | Oil & Gas Operator | Aug 2002 |
| 7 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 8 | Aikman Brothers, LLC | Amarillo, TX 79109 | Oil & Gas Operator | May 2025 |
| 9 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 10 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Oct 2025 |
| 11 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 12 | Amerex Corporation | Edmond, OK 73013-1044 | Oil & Gas Operator | Apr 2020 |
| 13 | An-Son Corporation | Oklahoma City, OK 73124 | Oil & Gas Operator | Jan 2006 |
| 14 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 15 | Angel Exploration Company | Oklahoma City, OK 73102-8868 | Oil & Gas Operator | Jan 2019 |
| 16 | Angel Exploration LLC | Oklahoma City, OK 73116-3603 | Oil & Gas Operator | Jul 2025 |
| 17 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 18 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Apr 2018 |
| 19 | Antioch Operating LLC | Dallas, TX 75206 | Oil & Gas Operator | Jun 2025 |
| 20 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 21 | Apache Energy Resources Corp | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 22 | Apc Operating Partnership LP | Tulsa, OK 74136-4224 | Oil & Gas Operator | Jun 2015 |
| 23 | Arbor Petroleum Corporation | Oklahoma City, OK 73102-4003 | Oil & Gas Operator | Mar 2011 |
| 24 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 25 | Arkoma Resources LLC | Henryetta, OK 74437 | Oil & Gas Operator | Jul 2025 |
| 26 | Arpel, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2014 |
| 27 | Arrington David Oil & Gas Inc | Midland, TX 79702-2071 | Oil & Gas Operator | Dec 2014 |
| 28 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Oct 2025 |
| 29 | Arrowhead Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 30 | Arvine Pipe & Supply Co Inc | Norman, OK 73069-8224 | Oil & Gas Operator | Jul 2015 |
| 31 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 32 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 33 | Atchley Resources, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Jul 2025 |
| 34 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 35 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2025 |
| 36 | B & H Oil Co. | Oklahoma City, OK 73108 | Oil & Gas Operator | Jan 2025 |
| 37 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Oct 2025 |
| 38 | Baruch-Foster Corporation | Oklahoma City, OK 73126-6770 | Oil & Gas Operator | Feb 2001 |
| 39 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 40 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 41 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2025 |
| 42 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2025 |
| 43 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 44 | Beasley Oil Company | Oklahoma City, OK 73120 | Oil & Gas Operator | Jun 2020 |
| 45 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 46 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Jun 2025 |
| 47 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 48 | Bell & Kinley Company LLC | Piedmont, OK 73078-8918 | Oil & Gas Operator | Jul 2021 |
| 49 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 50 | Benson Mineral Group Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 2022 |
| 51 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 52 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 53 | Betty L Wood Dba Able Oil Company | Morris, OK 74445-2303 | Oil & Gas Operator | Jun 2025 |
| 54 | Bevo Production Co. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2014 |
| 55 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 56 | Big Creek Energy LLC | Kingfisher, OK 73750-3102 | Oil & Gas Operator | Jul 2025 |
| 57 | Black Aubrey C | Dallas, TX 75206 | Oil & Gas Operator | Nov 2002 |
| 58 | Blackfire Operating LLC | Oklahoma City, OK 73116-4223 | Oil & Gas Operator | Jun 2025 |
| 59 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 60 | Bluebonnet Oil Corporation | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Jun 2025 |
| 61 | Bluebonnet Oil LLC | Oklahoma City, OK 73162-6249 | Oil & Gas Operator | Jul 2025 |
| 62 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jun 2025 |
| 63 | BMR II LLC | Evergreen, CO 80439 | Oil & Gas Operator | Jan 2023 |
| 64 | Bob & Son Oil Company | Hennessey, OK 73742-0578 | Oil & Gas Operator | Jul 2017 |
| 65 | Bogo Energy Corporation | Oklahoma City, OK 73134-1002 | Oil & Gas Operator | Jul 2025 |
| 66 | Bostick Services Corporation | Crescent, OK 73028 | Oil & Gas Operator | Aug 2025 |
| 67 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 68 | BP Explorationinc/Ofb See #17756 | | Oil & Gas Operator | Apr 2015 |
| 69 | Bracken Operating, L.L.C. | Perryton, TX 79070 | Oil & Gas Operator | Oct 2025 |
| 70 | Bracksieck Lloyd H | Boulder, CO 80303 | Oil & Gas Operator | Feb 2019 |
| 71 | Bradmar Petroleum Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 72 | Branson Production Company | Oklahoma City, OK 73123-1323 | Oil & Gas Operator | Aug 2002 |
| 73 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 74 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 75 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 76 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Jul 2025 |
| 77 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 78 | Brighton Energy LLC | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 79 | Briscoe Oil Operating Co., Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2015 |
| 80 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 81 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 82 | Bromar Oil Company | Fairview, OK 73737-0006 | Oil & Gas Operator | Apr 2014 |
| 83 | Brower, Robert C. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 2025 |
| 84 | Brown & Borelli, Inc. | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2025 |
| 85 | Brunsteter Dick Oil & Gas Inc | Alva, OK 73717-0068 | Oil & Gas Operator | Jul 2006 |
| 86 | BS&W Solutions LLC | | Oil Operator | Jun 2014 |
| 87 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Oct 2025 |
| 88 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 89 | Burkhart Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2002 |
| 90 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 91 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 92 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 93 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Jun 2025 |
| 94 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 95 | C.D. Operating Company, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 96 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jun 2025 |
| 97 | Callon Petroleum Company | Natchez, MS 39120 | Oil & Gas Operator | Jan 2000 |
| 98 | Calpine Natural Gas Company L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 99 | Camino Natural Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 100 | Canaan Energy Corporation | Oklahoma City, OK 73154-8806 | Oil & Gas Operator | Mar 2015 |