| 201 | Mustang Energy Inc. | Porter, TX 77365 | Oil & Gas Operator | Mar 2008 |
| 202 | Mustang Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2006 |
| 203 | Nadel & Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 204 | Nadel And Gussman LLC | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2026 |
| 205 | Neumin Production Company | Point Comfort, TX 77978 | Oil & Gas Operator | Apr 2026 |
| 206 | Nitro Oil & Gas, LLC | Cuero, TX 77954 | Oil & Gas Operator | Apr 2026 |
| 207 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 208 | Noe, T. C. Oil Acct. | Selman City, TX 75689 | Oil & Gas Operator | May 1996 |
| 209 | Nolte, Mike E., Inc. | Longview, TX 75606 | Oil & Gas Operator | Feb 2006 |
| 210 | North American Resources Company | Billings, MT 59101 | Oil & Gas Operator | Dec 2019 |
| 211 | North Central Oil Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 212 | Ocean Energy Inc | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 213 | Odegard Energy, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2020 |
| 214 | Oily Dog Operators Texas, LLC | Allen, TX 75002 | Oil Operator | Apr 2026 |
| 215 | Orion Oil & Gas Properties | Amarillo, TX 79109 | Gas Operator | Oct 2000 |
| 216 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 217 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Apr 2026 |
| 218 | Palmer Petroleum, Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 219 | Panther Creek Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2012 |
| 220 | Patara Andover I LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2014 |
| 221 | Patara Oil & Gas LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2018 |
| 222 | Patterson, Ben M., Jr. | San Antonio, TX 78216 | Oil & Gas Operator | Mar 2003 |
| 223 | Peak Energy Corporation | Plano, TX 75093 | Oil & Gas Operator | Oct 2018 |
| 224 | Petralis Energy Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 225 | Petro-Guard Company, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2014 |
| 226 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 227 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 228 | Powco Oil & Gas Co. | Athens, TX 75751 | Oil & Gas Operator | Feb 1995 |
| 229 | Powell, Gene Investments, Inc. | Longview, TX 75608 | Oil & Gas Operator | Apr 2024 |
| 230 | Prime Natural Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jun 2007 |
| 231 | Princess Three Operating, LLC | Henderson, TX 75653 | Oil & Gas Operator | Apr 2026 |
| 232 | Prudent Resources LLC | Houston, TX 77042 | Oil & Gas Operator | Apr 2026 |
| 233 | Psi Production, Inc. | Tyler, TX 75702 | Gas Operator | Jan 1994 |
| 234 | PXP Gulf Coast Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 235 | PXP Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2007 |
| 236 | Quantum Resources Management LLC | Houston, TX 77010 | Oil & Gas Operator | Jan 2026 |
| 237 | Quitman Construction Co., Inc. | Quitman, TX 75783 | Oil & Gas Operator | May 2011 |
| 238 | R2Q Operating LLC | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2026 |
| 239 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | Apr 2026 |
| 240 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 241 | Rheata Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 242 | Roach, R. Byron Trustee | Judson, TX 75660 | Oil & Gas Operator | Mar 1999 |
| 243 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 244 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 245 | Roosth Production Co. | Tyler, TX 75711 | Oil & Gas Operator | Apr 2026 |
| 246 | Rose City Resources, LLC | Tyler, TX 75703 | Oil & Gas Operator | Apr 2026 |
| 247 | S N D Energy Company, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Apr 2026 |
| 248 | S.E.D.I. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2015 |
| 249 | Sabine Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Jul 1996 |
| 250 | Sabine Energy Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 251 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 252 | Sabine Pipe & Supply Co. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2004 |
| 253 | Sabine Pipe, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 254 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 255 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 256 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 257 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 258 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2026 |
| 259 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 260 | SDG Operating Company, Inc | Tyler, TX 75701 | Oil & Gas Operator | Apr 2026 |
| 261 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 262 | Setex Oil And Gas Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2012 |
| 263 | Shaida, John H. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2026 |
| 264 | Sheer Energy, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 265 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 266 | Sigmon Production Company, Inc. | Longview, TX 75608 | Oil & Gas Operator | Dec 2013 |
| 267 | Signal Oil Company, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 268 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2026 |
| 269 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 270 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 271 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 272 | Southwestern Electric Power Co | Dallas, TX 75266 | Oil & Gas Operator | Dec 1989 |
| 273 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 274 | Spicewood Operating Company, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2026 |
| 275 | Stetson Petroleum Corp. | Rollins, MT 59931 | Oil & Gas Operator | Apr 2026 |
| 276 | Stonewall Production Company Inc | Tyler, TX 75702 | Oil & Gas Operator | Aug 2009 |
| 277 | Stratco, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 278 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Apr 2026 |
| 279 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | Apr 2026 |
| 280 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Apr 2026 |
| 281 | T & G Oil, Inc. | White Oak, TX 75693 | Oil & Gas Operator | Dec 2010 |
| 282 | T M Hopkins Operating Co | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2002 |
| 283 | Tanos Exploration II, LLC | Tyler, TX 75701 | Oil & Gas Operator | Sep 2023 |
| 284 | Tanos Exploration IV, LLC | Tyler, TX 75703 | Oil & Gas Operator | Apr 2026 |
| 285 | Tanos Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2018 |
| 286 | Tate, Larry V. Operating, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Apr 2002 |
| 287 | TDX Energy, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 288 | Teco Operating Company | Athens, TX 75751 | Oil & Gas Operator | Jun 2001 |
| 289 | Tex-Ok Energy, LTD Partnership | Cody, WY 82414 | Oil & Gas Operator | Apr 2026 |
| 290 | Texaco E & P Inc. | Houston, TX 77099 | Oil & Gas Operator | Apr 2026 |
| 291 | Texas Energy Operations, LC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2026 |
| 292 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 293 | TGNR East Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 294 | TGNR Gulf Coast LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2026 |
| 295 | Thomas, B. K. | Plano, TX 75093 | Oil & Gas Operator | Jan 2008 |
| 296 | Tischer Energy, LLC | Colleyville, TX 76034 | Oil & Gas Operator | Apr 2026 |
| 297 | Total E&P USA, Inc. | Houston, TX 77210 | Oil & Gas Operator | May 2025 |
| 298 | Total Minatome Corporation | Houston, TX 77210 | Oil & Gas Operator | Dec 1998 |
| 299 | Tracer Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 1998 |
| 300 | Trivium Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2026 |