| 201 | Focus Energy, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2019 |
| 202 | Foreman Enterprises, Inc. | Edmond, OK 73003 | Oil & Gas Operator | Mar 2025 |
| 203 | Fossil Creek Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2025 |
| 204 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 205 | Four Seas Exploration LLC | Oklahoma City, OK 73101-1557 | Oil & Gas Operator | Dec 2019 |
| 206 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 207 | Fpco Oil & Gas Co. | New Orleans, LA 70160 | Oil & Gas Operator | Jan 2025 |
| 208 | Franks Oil & Gas Inc | Cookson, OK 74427-0310 | Oil & Gas Operator | Oct 1998 |
| 209 | Freeman Oil Co | Midland, TX 79701 | Oil & Gas Operator | Sep 2014 |
| 210 | Fremont Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2004 |
| 211 | Fremont Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2014 |
| 212 | G A W Oil Company LLC | Enid, OK 73702-3926 | Oil & Gas Operator | Mar 2025 |
| 213 | Garrett, Dwayne M | | Oil & Gas Operator | Dec 2000 |
| 214 | Gary Jr Samuel & Assoc Inc | Denver, CO 80202-4803 | Oil & Gas Operator | Jul 1999 |
| 215 | Gas Enhancement Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2014 |
| 216 | Gene Cook Inc | Woodward, OK 73801 | Oil & Gas Operator | Mar 2025 |
| 217 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 218 | General Minerals Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | Dec 2015 |
| 219 | Genie Oil & Gas Corporation | Broken Arrow, OK 74013-3783 | Oil & Gas Operator | Feb 2025 |
| 220 | Geo720 LLC | Shattuck, OK 73858 | Oil & Gas Operator | Mar 2016 |
| 221 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 222 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Feb 2025 |
| 223 | Golden Gas Energies Inc | | Oil & Gas Operator | Jan 1999 |
| 224 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 225 | Gothic Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2015 |
| 226 | Gothic Production Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2016 |
| 227 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 228 | Graham-Michaelis Corporation | Wichita, KS 67201 | Oil & Gas Operator | Dec 2010 |
| 229 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | May 2025 |
| 230 | Greenlee Oil And Gas LLC | Norman, OK 73072 | Oil & Gas Operator | Feb 2025 |
| 231 | Greenwood Energy Inc | Oklahoma City, OK 73116-9083 | Oil & Gas Operator | Mar 2015 |
| 232 | Gulf Exploration, LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2025 |
| 233 | Gulf Production Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Apr 2015 |
| 234 | H & L Operating Co., L.L.P. | Amarillo, TX 79114 | Oil & Gas Operator | Aug 2022 |
| 235 | H & L Operating Company | Amarillo, TX 79114 | Oil & Gas Operator | Feb 2020 |
| 236 | H A Oil & Gas Company | Laverne, OK 73848-0100 | Gas Operator | Mar 2002 |
| 237 | Hadson Petroleum Corporation | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 238 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 239 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2025 |
| 240 | Harbor Resources LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2025 |
| 241 | Harding & Shelton Inc | Oklahoma City, OK 73104-2410 | Oil & Gas Operator | Feb 2025 |
| 242 | Harding And Shelton Exploration LLC | Oklahoma City, OK 73101-1557 | Oil & Gas Operator | Feb 2025 |
| 243 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 244 | Harrell Petroleum Inc | Oklahoma City, OK 73102-7201 | Oil & Gas Operator | Oct 2017 |
| 245 | Hartman Oil Co., Inc. | Wichita, KS 67206 | Oil & Gas Operator | Jan 2025 |
| 246 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 247 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 248 | HCM | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 249 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 250 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 251 | Heartland Environmental Services | Watonga, OK 73080 | Oil & Gas Operator | May 1999 |
| 252 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2025 |
| 253 | Hennessey Oil & Gas LLC | Hennessey, OK 73742-0212 | Oil & Gas Operator | Sep 2024 |
| 254 | Heritage Petroleum, Inc. | Stillwater, OK 74076 | Oil & Gas Operator | May 2025 |
| 255 | Herrman & Ikenberry | Cushing, OK 74023-0247 | Oil & Gas Operator | Dec 2003 |
| 256 | Hinkle Engineering, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2016 |
| 257 | Hodgden Operating Co., Inc. | Enid, OK 73702 | Oil & Gas Operator | Mar 2025 |
| 258 | Holke Dave Consulting Inc | Meridian, ID 83646-4812 | Oil & Gas Operator | Feb 2025 |
| 259 | Hondo Oil & Gas Company | Roswell, NM 88202 | Oil & Gas Operator | Aug 2006 |
| 260 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 261 | Horizon Natural Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2019 |
| 262 | Hosco Operating Inc | Seminole, OK 74868-2447 | Oil & Gas Operator | Aug 2017 |
| 263 | Hovas Enterprises | Perkins, OK 74059 | Oil & Gas Operator | Mar 2014 |
| 264 | HRB Operating Company, Inc. | Bridgeport, TX 76426 | Oil & Gas Operator | May 2025 |
| 265 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | May 2025 |
| 266 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 267 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 268 | Ike Energy LLC | Stillwater, OK 74074-1745 | Oil & Gas Operator | Jan 2025 |
| 269 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | May 2025 |
| 270 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 271 | Internorth Inc | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2014 |
| 272 | Investment Equipment LLC | FT Morgan, CO 80701 | Oil & Gas Operator | Mar 2025 |
| 273 | Irex Corporation | Englewood, CO 80111 | Oil & Gas Operator | May 2000 |
| 274 | J D Operating Company | Tulsa, OK 74105 | Oil & Gas Operator | Jun 2005 |
| 275 | J-Brex Company | Amarillo, TX 79101 | Oil & Gas Operator | May 2025 |
| 276 | Jackson L B Production Co | Tulsa, OK 74193-0001 | Oil & Gas Operator | Aug 2013 |
| 277 | JCR, Jr - Operating, Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Apr 2022 |
| 278 | JCS Operating LLC | Guymon, OK 73942 | Oil & Gas Operator | Feb 2025 |
| 279 | Jec Operating LLC | Oklahoma City, OK 73114-2717 | Oil & Gas Operator | Feb 2025 |
| 280 | Jenex Operating Company | The Woodlands, TX 77380-164280209 | Oil & Gas Operator | May 2019 |
| 281 | Jet Oil Co12/Ofb See 18649 | | Oil & Gas Operator | Jul 2007 |
| 282 | JFD,Inc | Houston, TX 77041-6914 | Oil & Gas Operator | Feb 2000 |
| 283 | Jim Clower Inc | Beaver, OK 73932 | Oil & Gas Operator | Feb 2025 |
| 284 | Jma Energy Company, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2025 |
| 285 | Jma Resources, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2025 |
| 286 | Jo-Allyn Oil Co Inc | Laverne, OK 73848 | Oil & Gas Operator | Mar 2025 |
| 287 | Johnson Exploration Company | Oklahoma City, OK 73102-7008 | Oil & Gas Operator | Jun 2015 |
| 288 | Jolen Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2025 |
| 289 | Jones & Pellow Oil Co | Oklahoma City, OK 73118-1115 | Oil & Gas Operator | Feb 2015 |
| 290 | Jones Energy LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Feb 2025 |
| 291 | K S Oil Company Inc | Norman, OK 73072-7480 | Oil & Gas Operator | Feb 2025 |
| 292 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2025 |
| 293 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Feb 2025 |
| 294 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 295 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 296 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 297 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 298 | Kenneth W. Cory, LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2025 |
| 299 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 300 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2025 |