| 201 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 202 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 203 | Geoquest Energy Inc | Enid, OK 73706-0216 | Oil & Gas Operator | Nov 2015 |
| 204 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 205 | Gill-Mac Inc | Nowata, OK 74048 | Oil & Gas Operator | May 1993 |
| 206 | Gilliland Oil And Gas Inc | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2025 |
| 207 | Glenn Supply Company, Inc. | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2025 |
| 208 | Goff D C Revocable Energy Trust | Fayetteville, AR 72702-1465 | Oil & Gas Operator | Jun 2005 |
| 209 | Goff Oil Company | | Oil & Gas Operator | Mar 1993 |
| 210 | Golden Circle Production Co | Seminole, OK 74868 | Oil & Gas Operator | May 2002 |
| 211 | Golden Gas Production Company | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 212 | Golden Gas Service Company | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2025 |
| 213 | Good Vaughn | Enid, OK 73702 | Oil & Gas Operator | Jul 2008 |
| 214 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 215 | Graves J M | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2007 |
| 216 | Great Northern Gas Company | Denver, CO 80293-0602 | Oil & Gas Operator | Jul 2017 |
| 217 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2024 |
| 218 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 219 | Halcon Holdings Inc | Ada, OK 74820 | Oil & Gas Operator | Nov 2018 |
| 220 | Halliburton Oil Producing Co. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2016 |
| 221 | Harbor Resources LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2025 |
| 222 | Hazlewood Oil & Gas Co Inc | Oklahoma City, OK 73139-9353 | Oil & Gas Operator | Apr 2022 |
| 223 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 224 | Headington Oil Company LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2016 |
| 225 | Highland Minerals, Inc. | Tulsa, OK 74145-7627 | Oil & Gas Operator | Apr 2015 |
| 226 | Himco Oil & Gas, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 227 | Hinkle Oil And Gas Inc | Oklahoma City, OK 73112-4275 | Oil & Gas Operator | Feb 2025 |
| 228 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 229 | Hondo Oil & Gas Company | Roswell, NM 88202 | Oil & Gas Operator | Aug 2006 |
| 230 | Horizon Natural Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2024 |
| 231 | Hovas Enterprises | Perkins, OK 74059 | Oil & Gas Operator | Mar 2014 |
| 232 | Huitt Joe A | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 233 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 234 | Impact Energy Operating LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Feb 2025 |
| 235 | Indian Oil Company | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2025 |
| 236 | Indian Wells Oil Co | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2000 |
| 237 | Infinity Hydrocarbons LLC | Houston, TX 77079 | Oil & Gas Operator | Aug 2022 |
| 238 | Inland Oil Corporation | Sapulpa, OK 74066 | Oil & Gas Operator | Jan 2025 |
| 239 | Inter-States Oil & Gas Inc | Edmond, OK 73003-0023 | Oil & Gas Operator | Apr 2020 |
| 240 | Investors Resources Corp | Edmond, OK 73034 | Oil & Gas Operator | Feb 2025 |
| 241 | J & M Operating Company | Pond Creek, OK 73766 | Oil Operator | Oct 2015 |
| 242 | J B Tank Trucks Inc | Blackwell, OK 74631-0464 | Oil Operator | Apr 2014 |
| 243 | Jackson L B Production Co | Tulsa, OK 74193-0001 | Oil & Gas Operator | Aug 2013 |
| 244 | Jan Oil Company | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 245 | January Investments LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2025 |
| 246 | Jenkins Charles L | Edmond, OK 73083-3610 | Oil Operator | Jul 1996 |
| 247 | Jenkins Petroleum Inc | Stillwater, OK 74076 | Oil & Gas Operator | Mar 1994 |
| 248 | Jerico Resources LLC | Seminole, OK 74868-6538 | Oil & Gas Operator | Apr 2020 |
| 249 | Jones Energy LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2025 |
| 250 | Jones, Mildred J | | Oil & Gas Operator | May 2006 |
| 251 | Jordan Oil & Gas Company | Healdsburg, CA 95448-1919 | Oil & Gas Operator | Mar 1995 |
| 252 | Jrhop Inc | Norman, OK 73072-4615 | Oil & Gas Operator | Dec 2015 |
| 253 | Jubilee Exploration LLC | Ardmore, OK 73401-7526 | Oil & Gas Operator | Dec 2024 |
| 254 | K & F Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Dec 2021 |
| 255 | K-Tel Petroleum | Englewood, CO 80111-4628 | Oil & Gas Operator | Sep 2007 |
| 256 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2025 |
| 257 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 258 | Keener Oil & Gas Company | Tulsa, OK 74119-4416 | Oil & Gas Operator | Feb 2025 |
| 259 | Keener Oil Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2018 |
| 260 | Kenneth W. Cory, LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Jan 2025 |
| 261 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jan 2025 |
| 262 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 263 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 264 | Kingfisher CSG Pullr & Const Inc | Hennessey, OK 73742-0024 | Oil & Gas Operator | Apr 2014 |
| 265 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 266 | KLM Oil & Gas Company | Tonganoxie, KS 66086 | Oil & Gas Operator | Apr 2014 |
| 267 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Feb 2025 |
| 268 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 269 | KTP Energy, Inc. | Denver, CO 80226 | Oil & Gas Operator | Aug 2019 |
| 270 | L & L Smith Energy Corporation | Muskogee, OK 74403-8479 | Oil & Gas Operator | Jan 2023 |
| 271 | Ladder Energy Company | Tulsa, OK 74120-4281 | Oil & Gas Operator | Jan 2018 |
| 272 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Feb 2025 |
| 273 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 274 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 275 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 276 | LCB Resources LLC | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Feb 2025 |
| 277 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 278 | Legacy - M & K Corporation | Dallas, TX 75231-0969 | Oil & Gas Operator | Jan 2025 |
| 279 | Legacy Energy Services LLC | Stillwater, OK 74074 | Oil & Gas Operator | Jan 2025 |
| 280 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Apr 2025 |
| 281 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Aug 2024 |
| 282 | Lion Petroleum Company | Oklahoma City, OK 73120-4503 | Oil & Gas Operator | Aug 2015 |
| 283 | Long George L | San Antonio, TX 78209 | Oil & Gas Operator | Feb 1996 |
| 284 | Long Resources Inc | San Antonio, TX 78230-2890 | Oil & Gas Operator | Feb 2025 |
| 285 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Feb 2025 |
| 286 | M M Energy, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Jan 2025 |
| 287 | M M Resources, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 288 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Apr 2025 |
| 289 | Mac Laskey Kelly Oilfield | El Dorado, KS 67042 | Oil & Gas Operator | Feb 2025 |
| 290 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Feb 2025 |
| 291 | Mack Oil Company | Duncan, OK 73534 | Oil & Gas Operator | Nov 2000 |
| 292 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 293 | Maxim Energy Corporation | Baytown, TX 77520 | Oil & Gas Operator | Jan 2025 |
| 294 | McCool John E | Youngsville, PA 16371 | Oil & Gas Operator | Jan 2025 |
| 295 | McMillin C C & Company Inc | Guthrie, OK 73044 | Oil & Gas Operator | Jan 2025 |
| 296 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Feb 2025 |
| 297 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 298 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 299 | Mel-Ray Oil Company | Nowata, OK 74048-0149 | Oil & Gas Operator | Mar 2004 |
| 300 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |