| 1 | 6G Twister, Inc. | Gillette, WY 82717 | Oil Operator | Jul 2012 |
| 2 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Jun 2025 |
| 3 | Abercrombie, A. L., Inc | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 4 | Aexco Petroleum Inc | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 5 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 6 | Anadarko Petrole | | Oil & Gas Operator | Dec 1996 |
| 7 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 8 | Anadarko Prod | | Oil & Gas Operator | Dec 1996 |
| 9 | Arco Oil & Gas C | | Oil & Gas Operator | Dec 1992 |
| 10 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 11 | Bce-Mach LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2025 |
| 12 | Becker Oil Corporation | Ponca City, OK 74602 | Oil & Gas Operator | Jun 2025 |
| 13 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 14 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 15 | Casillas Petroleum Corp | Satanta, KS 67870 | Oil & Gas Operator | Jul 2025 |
| 16 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 17 | Cimarex Energy Co. | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 18 | Continuum Midstream, LLC | Tulsa, OK 74136 | Oil Operator | Mar 2025 |
| 19 | Darrah Oil Company LLC | Wichita, KS 67201 | Oil & Gas Operator | Oct 2025 |
| 20 | Dunne Equities, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2014 |
| 21 | Edison Operating Company LLC | Wichita, KS 67226 | Oil & Gas Operator | Jun 2025 |
| 22 | Elm III Operating Company LLC | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 23 | Evans Energy, LLC | Mount Hope, KS 67108 | Oil & Gas Operator | Jun 2025 |
| 24 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Jul 2025 |
| 25 | Flintstone Energy, LLC | El Dorado, KS 67042 | Oil Operator | Jun 2020 |
| 26 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 27 | Greenhead Energy Operating LLC | Oklahoma City, OK 73131 | Oil & Gas Operator | Jul 2025 |
| 28 | H & B Petroleum Corp. | Hutchinson, KS 67504 | Oil & Gas Operator | Jun 2025 |
| 29 | Harris Oil & Gas Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2016 |
| 30 | Hartman Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 31 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 32 | Kansas Natural Gas Operating, LC | Hays, KS 67601 | Gas Operator | Jun 2025 |
| 33 | Kansas Natural Gas, Inc. | Hays, KS 67601 | Gas Operator | Jun 2025 |
| 34 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 35 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 36 | Merit Energy Company, LLC | Dallas, TX 75009 | Oil & Gas Operator | Jun 2025 |
| 37 | Mesa Operating Co. | Irving, TX 75039 | Oil & Gas Operator | Aug 1997 |
| 38 | Mesa Operating L | | Oil & Gas Operator | Dec 1996 |
| 39 | Mesa Petroleum C | | Oil & Gas Operator | Dec 1986 |
| 40 | Mobil Oil Corpor | | Oil & Gas Operator | Dec 1996 |
| 41 | Murfin Drilling Company Inc | Wichita, KS 67202 | Oil & Gas Operator | Aug 2025 |
| 42 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 43 | Oil Producers, Inc. Of Kansas | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 44 | Osborn Heirs Company LTD | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2025 |
| 45 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 46 | Panhandle Easter | | Gas Operator | Dec 1986 |
| 47 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Oct 2025 |
| 48 | Pennmark Resources Company | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 49 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Jun 2025 |
| 50 | Regency Field Services LLC | Dallas, TX 75201 | Oil Operator | Jul 2017 |
| 51 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 52 | Robert P. Wilson, Inc. | Montclair, NJ 07043 | Gas Operator | Dec 2019 |
| 53 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 54 | Southland Royalt | | Oil & Gas Operator | Nov 1993 |
| 55 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 56 | Tema Oil Company | Amarillo, TX 79101 | Oil & Gas Operator | Jun 2009 |
| 57 | Ulysses, City Of | Ulysses, KS 67880 | Gas Operator | Jun 2025 |
| 58 | Unknown | Houston, TX 77208 | Oil & Gas Operator | Dec 2023 |
| 59 | Vastar Resources | | Oil & Gas Operator | Dec 1996 |
| 60 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Jun 2025 |
| 61 | WGP-KHC, LLC | Houston, TX 77002 | Oil Operator | May 2017 |
| 62 | Wilson Robert P | | Gas Operator | Dec 1996 |
| 63 | Wilton Petroleum, Inc. | Canton, KS 67428 | Oil & Gas Operator | Jun 2025 |
| 64 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 65 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |