| 201 | G.H.W. Holding Company | Odessa, TX 79760 | Oil & Gas Operator | Nov 2000 |
| 202 | Gassiot Holding Corporation | Coleman, TX 76834 | Oil & Gas Operator | Apr 2016 |
| 203 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 204 | Geosurveys, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 205 | Gerry-Mac Oil, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 206 | Gideon Operating | Coleman, TX 76834 | Oil & Gas Operator | Oct 2025 |
| 207 | Gidoen Oil Company | Brookesmith, TX 76827 | Oil Operator | Oct 2025 |
| 208 | Gil-John Oil Co. | Alamogordo, NM 88310 | Oil & Gas Operator | Jan 2009 |
| 209 | Ginco Operating Co. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 210 | Ginnings Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 211 | GM Petroleum | Gulf Breeze, FL 32561 | Oil & Gas Operator | Mar 2014 |
| 212 | GM Petroleum Corporation (I) | Dallas, TX 75218 | Oil & Gas Operator | Aug 2003 |
| 213 | Golden Horse Group Corp. | Houston, TX 77082 | Oil Operator | Oct 2025 |
| 214 | Goopco, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 215 | Gopher Enterprises | Brownwood, TX 76801 | Oil & Gas Operator | Mar 2008 |
| 216 | Gould Energy Co. | Owasso, OK 74055 | Oil & Gas Operator | Mar 2005 |
| 217 | Grace 7 Properties, LTD. | Argyle, TX 76226 | Oil & Gas Operator | Oct 2025 |
| 218 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2025 |
| 219 | Graystone Exploration Corp. | Garland, TX 75043 | Oil & Gas Operator | Aug 2003 |
| 220 | Guidance Oil Developers, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 221 | H.A.N. Operating Incorporated | Clyde, TX 79510 | Oil & Gas Operator | Aug 2016 |
| 222 | Hailey Energy Corporation | Wesson, MS 39191 | Gas Operator | May 2013 |
| 223 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Oct 2025 |
| 224 | Hane Operating, Inc. | Santa Anna, TX 76878 | Oil & Gas Operator | Sep 2005 |
| 225 | Hardway Prod & Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Aug 2016 |
| 226 | Harms, Vance N. | Talpa, TX 76882 | Oil & Gas Operator | Mar 2016 |
| 227 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 228 | Harrell Operating Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2005 |
| 229 | Harvest Petroleum Inc. | Frisco, TX 75033 | Oil & Gas Operator | Oct 2025 |
| 230 | Hay Creek Investments, L.L.C. | Santa Anna, TX 76878 | Oil Operator | Jul 2018 |
| 231 | Hayes Oil & Gas Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2005 |
| 232 | Haynes Production Company, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Dec 2006 |
| 233 | Heartland Resources, Inc. | Temple, TX 76501 | Oil & Gas Operator | Mar 2008 |
| 234 | Herring, Casey Oil Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Nov 2008 |
| 235 | Herring, D Oil & Gas Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Oct 2025 |
| 236 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 237 | HGN Operating Co. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 238 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 239 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 240 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 241 | Holcomb Enterprises | Clyde, TX 79510 | Oil & Gas Operator | Aug 2003 |
| 242 | Holland Oil & Gas | Brookesmith, TX 76827 | Oil & Gas Operator | Dec 2010 |
| 243 | Holloway Oil Company | Austin, TX 78764 | Oil & Gas Operator | Feb 2004 |
| 244 | Hopewell Operating, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 245 | Houston Oil & Gas Company, Inc. | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 246 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 247 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 248 | Hunter, Rocquelle | Coleman, TX 76834 | Oil Operator | Oct 2025 |
| 249 | Huntland Properties, LTD. | Santa Anna, TX 76878 | Oil & Gas Operator | Oct 2025 |
| 250 | Ice Well Services, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Oct 2025 |
| 251 | International Oil&Gas Consultant | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 252 | International Western Oil Corp | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2025 |
| 253 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Oct 2025 |
| 254 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 255 | J & J Services Company | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2025 |
| 256 | J N R, Inc. | Austin, TX 78732 | Oil & Gas Operator | Aug 2009 |
| 257 | J R Investments | Cisco, TX 76437 | Oil & Gas Operator | Aug 2003 |
| 258 | J-E Production, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2008 |
| 259 | J.H. Oil, Inc. (A) | Tuscola, TX 79562 | Oil & Gas Operator | Dec 2004 |
| 260 | J.T. Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Sep 2018 |
| 261 | J.W.S. | Talpa, TX 76882 | Oil & Gas Operator | Oct 2025 |
| 262 | Jap Oil Corporation | Levelland, TX 79336 | Oil & Gas Operator | May 1994 |
| 263 | JCR, Jr - Operating, Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Apr 2022 |
| 264 | Jim-Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2003 |
| 265 | Jjes, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 266 | Johnson & Morris | Voss, TX 76888 | Oil & Gas Operator | Oct 2025 |
| 267 | Jones & Whittington Oil Co. | Coleman, TX 76834 | Oil & Gas Operator | Feb 2004 |
| 268 | Jones Company, LTD. | Albany, TX 76430 | Oil & Gas Operator | May 1999 |
| 269 | JQL Energy, LLC | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 270 | JSK Oilfield Service LLC | Santa Anna, TX 76878 | Oil Operator | Oct 2025 |
| 271 | Jubilee Oil And Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Nov 2009 |
| 272 | Jva Operating Company | Midland, TX 79710 | Oil & Gas Operator | Oct 2021 |
| 273 | K & W Vanpelt Company | Portage, OH 43451 | Oil & Gas Operator | Oct 2025 |
| 274 | K-M Oil Company, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Oct 2025 |
| 275 | Keene, Roy J. Jr. | Sugar Land, TX 77498 | Oil & Gas Operator | Jun 2016 |
| 276 | Kelt Oil & Gas, Inc. | Torrance, CA 90503 | Oil & Gas Operator | Dec 2003 |
| 277 | Kemp, Walter | Talpa, TX 76882 | Gas Operator | Oct 2025 |
| 278 | Kilpatrick Production Company | Tye, TX 79563 | Oil & Gas Operator | Oct 2025 |
| 279 | King Energy Resources | Kerrville, TX 78029 | Oil & Gas Operator | Oct 2025 |
| 280 | King Oil & Gas Co. | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 281 | King Oil & Resources Co | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 282 | Kinlaw Oil Corporation | Dallas, TX 75380 | Oil & Gas Operator | Oct 2025 |
| 283 | Kinney Incorporated | Andrews, TX 79714 | Oil & Gas Operator | Oct 2025 |
| 284 | KLH Oil & Gas, Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Oct 2025 |
| 285 | Klingberg, Roger | Cross Plains, TX 76443 | Oil & Gas Operator | Jan 2017 |
| 286 | Knox, Jack L. | Coleman, TX 76834 | Oil & Gas Operator | Oct 2025 |
| 287 | Koko Skadi, LLC | Austin, TX 78731 | Oil & Gas Operator | Oct 2025 |
| 288 | Kollao Properties LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 289 | Kornye-Tillman Company | Cleburne, TX 76031 | Oil & Gas Operator | Oct 2025 |
| 290 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 291 | Lance Leasing | Odessa, TX 79765 | Oil Operator | Oct 2025 |
| 292 | Lancer Petroleum Corporation | Irving, TX 75014 | Oil & Gas Operator | Feb 2014 |
| 293 | Landmaster Partners, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Oct 2025 |
| 294 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Oct 2025 |
| 295 | Leclair Operating, L.L.C. | Abilene, TX 79602 | Oil & Gas Operator | Oct 2025 |
| 296 | Ledbetter, Jerald D. Estate Of | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 297 | Ledbetter, Jerald D. Oil Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2007 |
| 298 | Leighty, Roger Operator | Lawrenceville, IL 62439 | Oil & Gas Operator | Oct 1997 |
| 299 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Oct 2025 |
| 300 | Lime Creek Enterprises | Aztec, NM 87410 | Oil & Gas Operator | Aug 2008 |