| 201 | Orsburn, Wade Inc. | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2002 |
| 202 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | May 2025 |
| 203 | P-R-O Management, Inc. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 204 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 205 | Panther Creek Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2012 |
| 206 | Payson Operating, LLC | Argyle, TX 76226 | Oil & Gas Operator | Mar 2018 |
| 207 | Pendragon Oil Co. | Fort Worth, TX 76116 | Oil & Gas Operator | May 2025 |
| 208 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 209 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |
| 210 | Peterson Oil And Gas LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | May 2025 |
| 211 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 212 | Petro-Guard Company, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2014 |
| 213 | Petrocorp Incorporated,A TX.Corp | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2005 |
| 214 | Phoenix Petrocorp, Inc. | McKinney, TX 75070 | Oil & Gas Operator | Mar 2025 |
| 215 | Pikeco Inc | Whitesboro, TX 76273 | Oil & Gas Operator | Nov 2001 |
| 216 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 217 | Precision Operating Inc. | Richardson, TX 75080 | Oil & Gas Operator | Jul 2014 |
| 218 | Price, W. H. & Sons | Granbury, TX 76048 | Oil & Gas Operator | Nov 1997 |
| 219 | Quanico Oil & Gas, Inc. | El Dorado, AR 71730 | Oil & Gas Operator | May 2025 |
| 220 | Reese Wellsite Supervision, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 221 | Regal Energy Operating, L.L.C. | Plano, TX 75024 | Oil & Gas Operator | May 2025 |
| 222 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 223 | Robertson-Bryce Management, LLC | Tyler, TX 75701 | Oil & Gas Operator | May 2025 |
| 224 | Roff Operating Company LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 225 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | May 2025 |
| 226 | Rowland Tank Truck Company | Sherman, TX 75090 | Oil & Gas Operator | May 2025 |
| 227 | RPM Petroleum, LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2013 |
| 228 | Ryder Scott Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 229 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 230 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 231 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 232 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 233 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 234 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 235 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 236 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 237 | Sauder Management Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 238 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 239 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 240 | Seitz, J. R. & Adam | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2008 |
| 241 | Seitz, J. R. & Adam, LTD. | Wichita Falls, TX 76307 | Oil Operator | May 2025 |
| 242 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 243 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | May 2025 |
| 244 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | May 2025 |
| 245 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 246 | Silver Spike Energy Oper, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2015 |
| 247 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 248 | Snuggs Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Jan 2024 |
| 249 | Southstar Energy Corporation | Ardmore, OK 73401 | Gas Operator | Aug 1990 |
| 250 | Spence Energy Company | Dallas, TX 75360 | Oil & Gas Operator | May 2025 |
| 251 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | May 2025 |
| 252 | St. Cajetan Oil Company, LLC | Gainesville, TX 76240 | Oil & Gas Operator | May 2025 |
| 253 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 254 | Star-Jet Co. | Gainesville, TX 76240 | Oil Operator | May 2025 |
| 255 | Starlight Ridge | Whitesboro, TX 76273 | Oil & Gas Operator | May 2025 |
| 256 | Staub, Larry | Richardson, TX 75080 | Oil & Gas Operator | Aug 2003 |
| 257 | Staub, Larry, Inc. | Azle, TX 76020 | Oil & Gas Operator | May 2025 |
| 258 | STB Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2008 |
| 259 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 260 | Street, Spencer B., Jr. | Graham, TX 76450 | Oil & Gas Operator | Mar 1998 |
| 261 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 262 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 263 | Tatanka Operating, LLC | Whitesboro, TX 76273 | Oil & Gas Operator | May 2025 |
| 264 | Taylor & Smith | Gainesville, TX 76240 | Oil & Gas Operator | May 2025 |
| 265 | TC Energy LLC | Covington, OK 73730-2116 | Oil & Gas Operator | Sep 2014 |
| 266 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | May 2025 |
| 267 | Texas Exploration & Prod. Co. | Gainesville, TX 76240 | Oil & Gas Operator | Apr 1996 |
| 268 | Texas Land & Petro Co., LLC | Carrollton, TX 75010 | Oil & Gas Operator | May 2025 |
| 269 | Texcel Exploration, Inc. | Colorado SPGS, CO 80960 | Oil & Gas Operator | May 2025 |
| 270 | The Cornell Corporation | Fort Worth, TX 76109 | Oil & Gas Operator | Sep 1993 |
| 271 | Trail Ridge Energy Partners, LLC | Grapevine, TX 76051 | Oil & Gas Operator | Mar 2025 |
| 272 | Trinity Bay Oil & Gas, Inc. | Lubbock, TX 79416 | Oil & Gas Operator | May 2025 |
| 273 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 274 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | May 2025 |
| 275 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | May 2025 |
| 276 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Jan 2025 |
| 277 | Venoco, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 278 | Vincus Investment Company | Dallas, TX 75225 | Oil & Gas Operator | Apr 2004 |
| 279 | Viola Production Inc | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 280 | W.R. Guffey LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2020 |
| 281 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 282 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 283 | Walsh, F H Jr. Operating Co. Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2019 |
| 284 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Feb 2025 |
| 285 | Westbrook Oil & Gas Co. Inc. | Gainesville, TX 76240 | Oil & Gas Operator | May 2025 |
| 286 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 287 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 288 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | May 2025 |
| 289 | White Marlin Operating Company, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 290 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 291 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 292 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 293 | Withrow Engineering, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2000 |
| 294 | Wolsey Well Service, Inc. | Windthorst, TX 76389 | Oil & Gas Operator | Jul 2006 |
| 295 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2025 |
| 296 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | May 2025 |