| 101 | Golden Gas Service Company | Tulsa, OK 74114 | Oil & Gas Operator | Jul 2025 |
| 102 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 103 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 104 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Jul 2025 |
| 105 | H & H Star Energy Inc | Traverse City, MI 49684 | Oil & Gas Operator | Aug 2016 |
| 106 | Hamon Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2011 |
| 107 | Hanna Oil And Gas Company | Fort Smith, AR 72901 | Oil & Gas Operator | Jun 2025 |
| 108 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 109 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jun 2025 |
| 110 | Henry Petroleum Of Oklahoma LP | Midland, TX 79703-5000 | Oil & Gas Operator | Feb 2017 |
| 111 | Hess Corporation | Houston, TX 77010 | Oil & Gas Operator | Aug 2017 |
| 112 | HK Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 113 | Hoover & Wilson Exp & Prod Inc | Fort Smith, AR 72913-5171 | Gas Operator | Jul 2013 |
| 114 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 115 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 116 | Hosco Operating Inc | Seminole, OK 74868-2447 | Oil & Gas Operator | Aug 2017 |
| 117 | Houston Exploration Co, The | Houston, TX 77002 | Oil & Gas Operator | Apr 2017 |
| 118 | Hsumy Oil & Gas Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2007 |
| 119 | J B Drilling Company Inc | Muldrow, OK 74948-6601 | Oil & Gas Operator | Jun 2025 |
| 120 | Jackass Flats Oil & Gas Co | Edmond, OK 73013 | Gas Operator | Jan 2015 |
| 121 | Jaco Energy Company Inc | Stigler, OK 74462 | Gas Operator | Jun 2025 |
| 122 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 123 | Jec Operating LLC | Oklahoma City, OK 73114-2717 | Oil & Gas Operator | Jun 2025 |
| 124 | JMC Exploration Inc | Dallas, TX 75225-5803 | Gas Operator | Jan 2007 |
| 125 | Joshua Energy LLC | Tulsa, OK 74134-7460 | Gas Operator | Jun 2025 |
| 126 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Oct 2025 |
| 127 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 128 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 129 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 130 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | May 2025 |
| 131 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 132 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 133 | Kickapoo Oil Co | Baton Rouge, LA 70815 | Gas Operator | Feb 1994 |
| 134 | Kodiak Oil & Gas Inc | Muenster, TX 76252 | Oil & Gas Operator | Oct 2025 |
| 135 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Oct 2025 |
| 136 | Lime Rock Resources A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 137 | Lime Rock Resources III-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Aug 2025 |
| 138 | Longberry Energy Inc | Keota, OK 74941 | Gas Operator | Jun 2025 |
| 139 | Lre Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2016 |
| 140 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2025 |
| 141 | Marathon Oil Company LLC | Houston, TX 77079 | Oil & Gas Operator | Jul 2025 |
| 142 | Marjo Operating Mid-Continent LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2025 |
| 143 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Jul 2025 |
| 144 | Meade Energy Corporation | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Jun 2025 |
| 145 | Meade James C | Oklahoma City, OK 73118-1544 | Gas Operator | Apr 2015 |
| 146 | Medallion Energy Inc | Norman, OK 73072-7436 | Oil & Gas Operator | Aug 2004 |
| 147 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 148 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 149 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |
| 150 | Midwest Energy Corporation | Tulsa, OK 74105-6083 | Oil & Gas Operator | Aug 2016 |
| 151 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 152 | Mobil Exp & Prod Us Inc | Houston, TX 77060-1991 | Oil & Gas Operator | May 2001 |
| 153 | Mueller Thomas C | Fort Smith, AR 72913 | Gas Operator | Aug 2008 |
| 154 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |
| 155 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Jul 2025 |
| 156 | National Energy Group, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 157 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2025 |
| 158 | Neok Production Company LLC | Nowata, OK 74048 | Oil & Gas Operator | Jun 2025 |
| 159 | Njre Operating Company | Tulsa, OK 74119 | Gas Operator | Dec 2016 |
| 160 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 161 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Oct 2025 |
| 162 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Oct 2025 |
| 163 | Oakland Petroleum Oper Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 164 | Okla Sub-Surface Pump & Supply Co | Seminole, OK 74804 | Oil & Gas Operator | Sep 2024 |
| 165 | Oneok Resources Company | Tulsa, OK 74102 | Oil & Gas Operator | Feb 2017 |
| 166 | Ovintiv Mid-Continent Inc. | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Jun 2025 |
| 167 | Oxley Energy LLC | Houston, TX 77042 | Gas Operator | Jun 2025 |
| 168 | Oxley Petroleum | Tulsa, OK 74119-3609 | Oil & Gas Operator | Jan 2020 |
| 169 | Oxley Petroleum Co | Oklahoma City, OK 73118-1044 | Oil & Gas Operator | Sep 2017 |
| 170 | Palisades Asset Holding Co LLC | Dallas, TX 75201 | Oil & Gas Operator | Aug 2017 |
| 171 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 172 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Jan 2025 |
| 173 | Pertex Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 1996 |
| 174 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 175 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Oct 2025 |
| 176 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 177 | Petroleum Properties MGMT. Co. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2014 |
| 178 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2025 |
| 179 | Phoenix Operating Company, Inc. | Shreveport, LA 71161 | Oil & Gas Operator | Mar 2015 |
| 180 | Piper Operating LLC | Stigler, OK 74462 | Oil & Gas Operator | Jun 2025 |
| 181 | Premier Resources LTD | Denver, CO 80237 | Oil & Gas Operator | Jul 2002 |
| 182 | Primexx Operating Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2024 |
| 183 | Prospective Investment & Trading | Scottsdale, AZ 85261-4190 | Oil & Gas Operator | Jun 2016 |
| 184 | Providence Exploration & Production Inc | Fort Smith, AR 72913-5171 | Gas Operator | Dec 2012 |
| 185 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 186 | Quality Production Co Of Stigler Inc | Stigler, OK 74462-0635 | Gas Operator | Feb 2013 |
| 187 | Questar Explor & Prod Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2017 |
| 188 | Quinton Rental & Repair Serv Inc | Quinton, OK 74561-0432 | Oil & Gas Operator | Mar 2015 |
| 189 | R A Miller Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Mar 2020 |
| 190 | Ra-Jac LLC | Norman, OK 73072 | Oil & Gas Operator | Jul 2025 |
| 191 | Raker Resources LLC | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 192 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103-4821 | Oil & Gas Operator | Jul 2025 |
| 193 | Redbud E & P, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Oct 2025 |
| 194 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 195 | Revere Corporation | Fort Smith, AR 72902-0908 | Oil & Gas Operator | Feb 2015 |
| 196 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 197 | Royalty Petroleum Company | Oklahoma City, OK 73120 | Gas Operator | Feb 2002 |
| 198 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 199 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 200 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |