| 101 | H & S Oil Company | Kellyville, OK 74039 | Oil & Gas Operator | Mar 1998 |
| 102 | Hailey Energy Corporation | Wesson, MS 39191 | Gas Operator | May 2013 |
| 103 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 104 | Hamp Oil | Ponca City, OK 74604 | Oil & Gas Operator | Sep 2002 |
| 105 | Harrison Oil & Gas Inc | Houston, TX 77019 | Oil & Gas Operator | Jun 2025 |
| 106 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 107 | HCG Energy Corporation & Subs | | Oil & Gas Operator | Mar 2015 |
| 108 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 109 | Henson Terry Dba Daycon Exploration | Tulsa, OK 74137-3546 | Oil & Gas Operator | Jun 2025 |
| 110 | Hiawatha Exploration Company | Oklahoma City, OK 73116-7326 | Oil & Gas Operator | Mar 2009 |
| 111 | Hitchita #1 LP | Edmond, OK 73013-6628 | Oil & Gas Operator | Sep 1997 |
| 112 | Holke Dave Consulting Inc | Meridian, ID 83646-4812 | Oil & Gas Operator | Jun 2025 |
| 113 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 114 | HRB Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | Oct 2025 |
| 115 | HRC Production Co | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 116 | Hunt Engineering Inc | Norman, OK 73069-4093 | Oil & Gas Operator | Feb 2019 |
| 117 | Hutton Gas Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 118 | Illoma Oil Company Inc | Algonquin, IL 60102-1825 | Oil & Gas Operator | Mar 2015 |
| 119 | J B Drilling Company Inc | Muldrow, OK 74948-6601 | Oil & Gas Operator | Jun 2025 |
| 120 | J D Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jun 2005 |
| 121 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 122 | Jenex Operating Company | The Woodlands, TX 77380-164280209 | Oil & Gas Operator | May 2019 |
| 123 | Jolen Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 124 | Karbuhn Oil Company | Tomball, TX 77375 | Oil & Gas Operator | Oct 2025 |
| 125 | Kellogg Oil Company | Henryetta, OK 74437 | Oil & Gas Operator | Oct 2024 |
| 126 | Kelloil Inc | Fort Worth, TX 76116-5600 | Oil & Gas Operator | Mar 2015 |
| 127 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 128 | Kepasa Corp | Oklahoma City, OK 73106 | Oil & Gas Operator | Jul 2025 |
| 129 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 130 | Kerr McGee Rocky MTN Corp | Denver, CO 80202-5736 | Oil & Gas Operator | Mar 2015 |
| 131 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | May 2025 |
| 132 | Kingery Drilling Co., Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Jun 2025 |
| 133 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 134 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 135 | Landmark Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Jun 2025 |
| 136 | Lansden Operating Co LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 1997 |
| 137 | Laurco Energies,Inc | | Oil & Gas Operator | May 2025 |
| 138 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2025 |
| 139 | Magic Investments LLC | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 140 | Majors John Dba Majors Production Co | Weleetka, OK 74880 | Oil & Gas Operator | Jun 2025 |
| 141 | Manis Oil & Gas Inc | Blanchard, OK 73010 | Oil & Gas Operator | Jul 2025 |
| 142 | Marion Corporation | | Oil & Gas Operator | Jan 2001 |
| 143 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Jun 2025 |
| 144 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 145 | Mel Cox Transports Inc | Comanche, OK 73529-7640 | Oil & Gas Operator | Jul 2022 |
| 146 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 147 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 148 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | May 2025 |
| 149 | Midcontinent Oil & Gas Company | Phoenix, AZ 85022-6180 | Oil & Gas Operator | Jun 2012 |
| 150 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 151 | Milburn R Kenneth | Ardmore, OK 73402-1118 | Oil & Gas Operator | Sep 2014 |
| 152 | Miller Exploration Company | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2015 |
| 153 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 154 | Moffitt W G Trust | Fort Gibson, OK 74434-4258 | Gas Operator | Nov 2019 |
| 155 | Monarch Energy Company LLC | Eufaula, OK 74432 | Oil & Gas Operator | Jun 2025 |
| 156 | Morton Leases | Morris, OK 74445-2048 | Oil & Gas Operator | Jul 2017 |
| 157 | Morton Leases Inc | | Oil & Gas Operator | Jul 2025 |
| 158 | Muirfield Resources Company | Tulsa, OK 74101-3166 | Oil & Gas Operator | Jun 2024 |
| 159 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2025 |
| 160 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |
| 161 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Jul 2025 |
| 162 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jun 2024 |
| 163 | Neok Production Company LLC | Nowata, OK 74048 | Oil & Gas Operator | Jun 2025 |
| 164 | New Dominion LLC | Tulsa, OK 74119-3220 | Oil & Gas Operator | Jun 2025 |
| 165 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 166 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Oct 2025 |
| 167 | Oex-1 LLC | Tulsa, OK 74105-5153 | Oil & Gas Operator | Mar 2024 |
| 168 | Onapa Gas Company LLC | Tulsa, OK 74136-7253 | Gas Operator | Nov 2019 |
| 169 | Ovintiv Mid-Continent Inc. | The Woodlands, TX 77380-2764 | Oil & Gas Operator | Jun 2025 |
| 170 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 171 | Pactola Development Co | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2004 |
| 172 | Panther Energy Company, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2022 |
| 173 | Pathfinder Exploration LLC | Norman, OK 73069-8516 | Gas Operator | Aug 2003 |
| 174 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 175 | Patina Oklahoma Corp | Duncan, OK 73533-9523 | Oil & Gas Operator | Nov 2014 |
| 176 | Payne Exploration Company | Crescent, OK 73028 | Oil & Gas Operator | Jun 2025 |
| 177 | Payne W C Family Trust | Oklahoma City, OK 73116-9044 | Oil & Gas Operator | Mar 2015 |
| 178 | Payrock Energy LLC | Oklahoma City, OK 73134-2612 | Oil & Gas Operator | Feb 2023 |
| 179 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Jan 2025 |
| 180 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 181 | Pepin Operating Company Inc | Stillwater, OK 74075-9535 | Oil & Gas Operator | May 2009 |
| 182 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 183 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 184 | Petroleum Properties Co Inc | Tulsa, OK 74132-4010 | Oil & Gas Operator | Sep 2012 |
| 185 | Petron Oil Company | Missouri City, TX 77489 | Oil & Gas Operator | Oct 2025 |
| 186 | Pettit Charles Oil Company | Okmulgee, OK 74447-4226 | Oil & Gas Operator | Sep 2018 |
| 187 | Pollard Jr G W | Okmulgee, OK 74447 | Oil & Gas Operator | Apr 2015 |
| 188 | Porter Oil And Gas Inc | Fort Smith, AR 72903-6906 | Oil & Gas Operator | Jun 2025 |
| 189 | Pure Energy Systems Inc | Olive Branch, MS 38654-9041 | Gas Operator | Jun 2025 |
| 190 | Qep Energy Company | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 191 | Questar Explor & Prod Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2017 |
| 192 | R & D Oil & Gas | Exeter, CA 93221-9697 | Oil & Gas Operator | Aug 2019 |
| 193 | Rako Operating Company | Fayetteville, AR 72701 | Oil & Gas Operator | Jun 2025 |
| 194 | Ranger Drilling LLC | Chicago, IL 60605-1041 | Oil & Gas Operator | Feb 2004 |
| 195 | Ray'S Oil Company | Boynton, OK 74422 | Oil & Gas Operator | Jun 2025 |
| 196 | Red Dirt Environmental Services LLC | Checotah, OK 74426 | Oil & Gas Operator | Jun 2025 |
| 197 | Red Fork Production, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2025 |
| 198 | Redbud E & P, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Oct 2025 |
| 199 | Regal Petroleum Services Inc | Euless, TX 76039-1127 | Oil & Gas Operator | May 2015 |
| 200 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |