| 1 | A & A Tank Truck Company | Norman, OK 73070-8969 | Oil & Gas Operator | Sep 2025 |
| 2 | Abercrombie A L Inc | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 3 | Abundance Energy I LLC | Tulsa, OK 74114 | Gas Operator | Sep 2025 |
| 4 | Abundance Energy Services LLC | Tulsa, OK 74114 | Gas Operator | Sep 2025 |
| 5 | Agave Energy Inc | Stigler, OK 74462 | Oil & Gas Operator | Aug 2025 |
| 6 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 7 | Amax Petroleum Corporation | Houston, TX 77042 | Oil & Gas Operator | Dec 2012 |
| 8 | American Natural Energy Corp | Oklahoma City, OK 73114 | Oil & Gas Operator | Jan 2025 |
| 9 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Sep 2025 |
| 10 | Anson Company | Oklahoma City, OK 73124 | Oil & Gas Operator | Apr 2018 |
| 11 | Arkoma Holding Corporation | Oklahoma City, OK 73102-5684 | Gas Operator | Jul 2007 |
| 12 | Arkoma Operations LLC | Tulsa, OK 74114-3502 | Oil & Gas Operator | Aug 2025 |
| 13 | Arkoma Production Company | Shreveport, LA 71101 | Gas Operator | Apr 2020 |
| 14 | Arkoma Resources LLC | Henryetta, OK 74437 | Oil & Gas Operator | Sep 2025 |
| 15 | Arrow Oil & Gas, LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 2025 |
| 16 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 17 | Atls Production Company LLC | Fort Worth, TX 76102-7426 | Gas Operator | Sep 2020 |
| 18 | Austin Production Company, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Mar 2015 |
| 19 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Sep 2025 |
| 20 | Barrett Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Aug 2003 |
| 21 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 22 | Bear Productions Inc | Kinta, OK 74552 | Oil & Gas Operator | Aug 2025 |
| 23 | Bevo Production Co. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2014 |
| 24 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 25 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 26 | Black Aubrey C | Dallas, TX 75206 | Oil & Gas Operator | Nov 2002 |
| 27 | Blackbeard Operating East LLC | Midland, TX 79701-4532 | Oil & Gas Operator | Dec 2020 |
| 28 | Blackwell Gas Company | | Gas Operator | Jun 1997 |
| 29 | Blue Water Resources LLC | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 30 | Bluemark Energy, LLC | Tulsa, OK 74135 | Oil & Gas Operator | Aug 2025 |
| 31 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Aug 2025 |
| 32 | Bravo Arkoma LLC | Tulsa, OK 74103-3100 | Oil & Gas Operator | Jul 2025 |
| 33 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 34 | Brewer Carroll L | Edmond, OK 73003-0010 | Oil & Gas Operator | Aug 2025 |
| 35 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 36 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 37 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Sep 2025 |
| 38 | Briar Oil & Gas - Oklahoma 1 LLC | Houston, TX 77027-9392 | Oil & Gas Operator | Sep 2025 |
| 39 | Brighton Energy, L.L.C. | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 40 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 41 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 42 | Bta Oil Producers, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 43 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 44 | Canvas Energy LLC | Oklahoma City, OK 73142-1839 | Oil & Gas Operator | Sep 2025 |
| 45 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 46 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 47 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2025 |
| 48 | Choctaw Gas Company | Quinton, OK 74561 | Gas Operator | Aug 2025 |
| 49 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Dec 2025 |
| 50 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 51 | CMS Nomeco Oil & Gas Co. | Jackson, MI 49201 | Oil & Gas Operator | Jan 2015 |
| 52 | Concorde Resources Corporation | Eufaula, OK 74432 | Oil & Gas Operator | Aug 2025 |
| 53 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 54 | Continental Resources, Inc. | Oklahoma City, OK 73126 | Oil & Gas Operator | Dec 2025 |
| 55 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 56 | Corman, Jack | Dallas, TX 75231 | Oil & Gas Operator | May 2022 |
| 57 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 58 | Crawley Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 59 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 60 | Cricket Petroleum | Tulsa, OK 74146 | Oil & Gas Operator | Dec 2016 |
| 61 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2025 |
| 62 | Cross Timbers Production Co | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 2005 |
| 63 | Crow Creek Operating Co III LLC | Tulsa, OK 74137-8432 | Oil & Gas Operator | Apr 2015 |
| 64 | D-Pex Operating Company | | Oil & Gas Operator | Sep 2004 |
| 65 | Daniel-Price Exploration Co | Tulsa, OK 74119 | Gas Operator | Apr 2011 |
| 66 | DCP Operating Co LP | Houston, TX 77042 | Oil & Gas Operator | Aug 2025 |
| 67 | Derrick Resources Inc | Henryetta, OK 74437-4249 | Oil & Gas Operator | Aug 2025 |
| 68 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 69 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 70 | Devon Louisiana Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2019 |
| 71 | DMS Oil Company | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 72 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 73 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Sep 2025 |
| 74 | Eagle Rock Mid-Continent Operating LLC | Tulsa, OK 74103-3703 | Oil & Gas Operator | Aug 2025 |
| 75 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 76 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Sep 2025 |
| 77 | Enable Gas Transmission LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2022 |
| 78 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Sep 2025 |
| 79 | Enerquest Oil & Gas LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Aug 2025 |
| 80 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 81 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 82 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 83 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 84 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 85 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Aug 2025 |
| 86 | Farmers Energy Corporation | Tulsa, OK 74103-3525 | Oil & Gas Operator | Nov 2021 |
| 87 | Faulconer, Vernon E., Inc. | Tyler, TX 75711 | Oil & Gas Operator | Sep 2025 |
| 88 | Faulkner Corporation | Oklahoma City, OK 73154-9704 | Oil & Gas Operator | Jan 2017 |
| 89 | Ferguson Oil Company Inc | | Oil & Gas Operator | Apr 1994 |
| 90 | Fortuna Energy Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2014 |
| 91 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Dec 2025 |
| 92 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Sep 2025 |
| 93 | Fugo Services Inc | McAlester, OK 74502-1429 | Oil & Gas Operator | Feb 1999 |
| 94 | Ganer Mark Oil & Gas | Owasso, OK 74055 | Oil & Gas Operator | Aug 2005 |
| 95 | Garnet Exploration LLC | Spiro, OK 74959-4839 | Gas Operator | Aug 2025 |
| 96 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 97 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 98 | Geyer Brothers Equipment Company | Noble, OK 73068-8540 | Oil & Gas Operator | Mar 2011 |
| 99 | GHK Company LLC (The) | Oklahoma City, OK 73118-1120 | Oil & Gas Operator | Apr 2018 |
| 100 | Gla Inc | Norman, OK 73070 | Oil & Gas Operator | Sep 2025 |