| 201 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Apr 2025 |
| 202 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 203 | Franklin, J.W. Oil Operator | | Oil & Gas Operator | Nov 2001 |
| 204 | Frontier Resources, Inc. | Dallas, TX 75214 | Oil & Gas Operator | Apr 2025 |
| 205 | Furry Producing Company | Brownwood, TX 76801 | Oil & Gas Operator | Apr 2025 |
| 206 | Gala Resources, LTD. | Graham, TX 76450 | Oil & Gas Operator | Jan 2025 |
| 207 | Gaylyn, Inc. | Comanche, TX 76442 | Oil & Gas Operator | Apr 2025 |
| 208 | GBF Operating LLC | Morrison, CO 80465 | Oil & Gas Operator | Apr 2025 |
| 209 | Genecov Group, Inc. The | Tyler, TX 75713 | Oil & Gas Operator | Dec 2002 |
| 210 | Geosurveys, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 211 | Gerry-Mac Oil, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 212 | Giant Energy Corp. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2019 |
| 213 | Giant NRG Co., LP | Dallas, TX 75230 | Oil & Gas Operator | Apr 2025 |
| 214 | Gil-John Oil Co. | Alamogordo, NM 88310 | Oil & Gas Operator | Jan 2009 |
| 215 | Global Drilling, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 216 | Gordon B Services LLC | Eastland, TX 76448 | Oil & Gas Operator | Apr 2025 |
| 217 | Great American Resources Inc. | Bowie, TX 76230 | Oil & Gas Operator | Apr 2025 |
| 218 | Great West Operating Co., Inc. | Dallas, TX 75240 | Oil & Gas Operator | Aug 2003 |
| 219 | Greenhaw, Morris R Oil & Gas Inc | Desdemona, TX 76445 | Oil & Gas Operator | May 2006 |
| 220 | Greenhaw, Morris R. | Desdemona, TX 76445 | Oil & Gas Operator | Apr 2025 |
| 221 | Griffin Resources | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2003 |
| 222 | Grothe Bros. | Albany, TX 76430 | Oil & Gas Operator | May 2011 |
| 223 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 224 | GT Productions | Euless, TX 76040 | Oil & Gas Operator | Jan 1997 |
| 225 | Guidance Oil Developers | Boerne, TX 78006 | Oil & Gas Operator | Apr 2025 |
| 226 | Guidance Oil Developers, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 227 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 228 | H. Bryan Poff, LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Oct 2018 |
| 229 | Hailey Energy Corporation | Wesson, MS 39191 | Gas Operator | May 2013 |
| 230 | Hanvey Production Co., Inc. | Roanoke, TX 76262 | Oil & Gas Operator | Nov 2012 |
| 231 | Hanvey, Don H. Oil Interests Inc | Ranger, TX 76470 | Oil & Gas Operator | Apr 2025 |
| 232 | Hardrock Operating Company, Inc. | Fort Worth, TX 76161 | Oil & Gas Operator | Apr 2025 |
| 233 | Harvest Operating Company, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Dec 1997 |
| 234 | Harvick, George R. | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |
| 235 | Hayes Oil & Gas Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2005 |
| 236 | HD Special-Situations, LP | San Francisco, CA 94111 | Oil & Gas Operator | Feb 2014 |
| 237 | Heflin, Bryan Exploration, Inc. | Strawn, TX 76475 | Oil & Gas Operator | Mar 2008 |
| 238 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | Apr 2025 |
| 239 | Heritage Petroleum Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Apr 2025 |
| 240 | Herod Investments, Inc. | Ranger, TX 76470 | Oil & Gas Operator | Jul 1999 |
| 241 | Herod, Bill | Ranger, TX 76470 | Oil & Gas Operator | Apr 2022 |
| 242 | Herzfeld Fabricators Inc | Wichita Falls, TX 76307 | Oil & Gas Operator | Aug 2017 |
| 243 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 244 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 245 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Apr 2025 |
| 246 | Hill Operating LLC | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 2023 |
| 247 | Hill, Charles Drilling, Inc. | Grand Prairie, TX 75052 | Oil & Gas Operator | Apr 2025 |
| 248 | Hill-Lake Gas Storage, L.P. | Houston, TX 77057 | Oil & Gas Operator | Aug 2010 |
| 249 | Hill-Lake Gas Storage, LLC | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2025 |
| 250 | Hipp Oil And Gas Inc. | Big Spring, TX 79720 | Oil & Gas Operator | Apr 2025 |
| 251 | Hodges & Rister | Abilene, TX 79603 | Oil & Gas Operator | Apr 2016 |
| 252 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 253 | Hoffmann Oil Company | Eastland, TX 76448 | Oil & Gas Operator | Apr 2025 |
| 254 | Horn Energy | Eastland, TX 76448 | Oil & Gas Operator | Apr 2025 |
| 255 | Houtchens, D. D. | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2025 |
| 256 | Huber Energy L.P. | Houston, TX 77079 | Oil & Gas Operator | Feb 2007 |
| 257 | Huber Energy Panhandle LP | Houston, TX 77079 | Oil & Gas Operator | Oct 2005 |
| 258 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Apr 2025 |
| 259 | Hudson Brothers Mining Co., Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jun 1994 |
| 260 | Hudson, Comer Oil & Gas | Cisco, TX 76437 | Oil & Gas Operator | Jan 2003 |
| 261 | Hunter Brothers | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2007 |
| 262 | Hunter Oil & Gas Co. | Bangs, TX 76823 | Oil & Gas Operator | Apr 2025 |
| 263 | Ice Well Services, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Apr 2025 |
| 264 | Ics Energy LLC | Stamford, TX 79553 | Oil & Gas Operator | Apr 2025 |
| 265 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 266 | International Basic Res., Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 1996 |
| 267 | International Oil&Gas Consultant | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 268 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | Apr 2025 |
| 269 | Isbell, Bob G. Operating | Cisco, TX 76437 | Oil & Gas Operator | Mar 2015 |
| 270 | Iva Oil | Cisco, TX 76437 | Oil & Gas Operator | Apr 2025 |
| 271 | J & J Operating | Graford, TX 76449 | Oil & Gas Operator | Apr 2025 |
| 272 | J & J Whiteside Inc. | Comanche, TX 76442 | Oil & Gas Operator | Apr 2025 |
| 273 | J & TG, LLC | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |
| 274 | J & W Oil Co.-W. F. | Eastland, TX 76448 | Oil & Gas Operator | Apr 2025 |
| 275 | J G Oil & Gas | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |
| 276 | J R Investments | Cisco, TX 76437 | Oil & Gas Operator | Aug 2003 |
| 277 | J.W.S. | Talpa, TX 76882 | Oil & Gas Operator | Apr 2025 |
| 278 | Jackson Energy Development, Inc. | Cedar Park, TX 78613 | Oil & Gas Operator | Apr 2025 |
| 279 | Jaco, Troy Inc. | Sherman, TX 75091 | Oil & Gas Operator | Apr 2025 |
| 280 | JD Operating | Eastland, TX 76448 | Oil & Gas Operator | Apr 2025 |
| 281 | JD Production Co | Waco, TX 76702 | Oil & Gas Operator | Dec 2009 |
| 282 | JM Investments, L.L.C. | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2025 |
| 283 | Jobe, B. M. | El Paso, TX 79930 | Oil & Gas Operator | Apr 2025 |
| 284 | Johnco Petroleum, Inc. | Granbury, TX 76048 | Oil & Gas Operator | Mar 2008 |
| 285 | Johnson, William D. | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2008 |
| 286 | Joint Resources Company | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 287 | Jones Company, LTD. | Albany, TX 76430 | Oil & Gas Operator | May 1999 |
| 288 | Keating Energy, Inc. | Ambler, PA 19002 | Oil & Gas Operator | Apr 2025 |
| 289 | Kennedy, Joseph D. | Stephenville, TX 76401 | Oil & Gas Operator | Jun 1995 |
| 290 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jan 2025 |
| 291 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 292 | Keystone Operating Co. | Round Rock, TX 78681 | Oil & Gas Operator | Apr 2025 |
| 293 | Killion Well Service Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2014 |
| 294 | Kimble Oil Company, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2006 |
| 295 | King Energy Resources | Kerrville, TX 78029 | Oil & Gas Operator | Apr 2025 |
| 296 | King Oil & Gas Co. | Cisco, TX 76437 | Oil & Gas Operator | Apr 2025 |
| 297 | King Operating Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2025 |
| 298 | Klingberg, Roger | Cross Plains, TX 76443 | Oil & Gas Operator | Jan 2017 |
| 299 | Ko Operating | Merkel, TX 79536 | Oil & Gas Operator | Apr 2025 |
| 300 | Kokomo Energy, Inc. | Gorman, TX 76454 | Oil & Gas Operator | Apr 2025 |