| 201 | HMT Pipeline Company, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Dec 2025 |
| 202 | Hobbs Energy Corporation | San Angelo, TX 76904 | Oil & Gas Operator | Mar 2008 |
| 203 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 204 | Hughey, W. R., Operating Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2005 |
| 205 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 206 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 207 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 208 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 209 | Independence Resources MGMT, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Mar 2021 |
| 210 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 211 | Irion Corporation, The | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2021 |
| 212 | Isom Energy, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | May 2018 |
| 213 | J & J Services Company | San Angelo, TX 76904 | Oil & Gas Operator | Dec 2025 |
| 214 | J.P. Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 215 | Jasper Resources, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 1996 |
| 216 | Jerry Hess Operating Company | Muenster, TX 76252 | Oil Operator | Dec 2008 |
| 217 | Jetta Operating Company, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 218 | Jim-Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Dec 2003 |
| 219 | JM Cox Resources LP | Midland, TX 79702 | Oil & Gas Operator | Apr 2019 |
| 220 | JTL Operating Co Inc | Katy, TX 77450 | Oil & Gas Operator | Dec 2025 |
| 221 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Oct 2025 |
| 222 | Kestrel Resources, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Sep 2015 |
| 223 | Keystone Petroleum NM LLC | Irving, TX 75039 | Oil & Gas Operator | Jan 2016 |
| 224 | Kodiak Productions LTD | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2014 |
| 225 | Kroh Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 226 | Kstone Energy, LLC | Oklahoma City, OK 73106 | Oil Operator | Dec 2025 |
| 227 | Ladd Oil & Gas Corporation | Midland, TX 79711 | Oil & Gas Operator | Dec 2021 |
| 228 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 229 | Laredo Petroleum - Dallas, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2014 |
| 230 | Laredo Petroleum Inc | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 231 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 232 | Lavanco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2006 |
| 233 | Lavanco Energy, LTD. | San Angelo, TX 76906 | Oil & Gas Operator | Feb 2024 |
| 234 | Lawrence, C. F. & Assoc. Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2025 |
| 235 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Dec 2025 |
| 236 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 237 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2025 |
| 238 | Limark Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2003 |
| 239 | Linco Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Dec 2025 |
| 240 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Jun 2025 |
| 241 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 242 | Linn Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 243 | Lipan Flats Production, L.L.C. | San Angelo, TX 76905 | Oil Operator | Dec 2025 |
| 244 | Live Oak Gas Company | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 245 | Llano Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 246 | Los Hijos De Sanchez J LLC | Beeville, TX 78102 | Oil Operator | Dec 2025 |
| 247 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 248 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 249 | Martin, Jimmy Inc | San Angelo, TX 76904 | Oil & Gas Operator | Dec 2025 |
| 250 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 251 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 252 | Mayne & Mertz, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2013 |
| 253 | McCammon Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2025 |
| 254 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Dec 2025 |
| 255 | McIver, Inc | San Angelo, TX 76903 | Oil & Gas Operator | Dec 2025 |
| 256 | MDM Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Dec 2025 |
| 257 | Meadco Properties | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 258 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 259 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 260 | Merit Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | May 1994 |
| 261 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Dec 2025 |
| 262 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Dec 2025 |
| 263 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 264 | Michaelson Producing Company | MC Camey, TX 79752 | Oil & Gas Operator | Dec 2025 |
| 265 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 266 | Mills, Pete | Midland, TX 79707 | Oil & Gas Operator | Sep 2005 |
| 267 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 268 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 269 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 270 | Molopo Energy Texas, LLC | Canada, 00100 | Oil & Gas Operator | Jan 2015 |
| 271 | Montgomery Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2007 |
| 272 | Moore, John D. | Midland, TX 79708 | Oil & Gas Operator | Mar 1995 |
| 273 | Moriah Operating,LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 274 | Morrow Resources, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2004 |
| 275 | Munson Operating, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 276 | Munson, David M. Inc. | Dallas, TX 75251 | Oil & Gas Operator | Dec 2025 |
| 277 | MV Purchasing LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 278 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 279 | Nadel And Gussman Permian,L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 280 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | Dec 2025 |
| 281 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 282 | North Lake Resources LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Dec 2025 |
| 283 | Northland Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2003 |
| 284 | Northstar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 285 | Norwood, A. N., Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 1997 |
| 286 | Nueces Minerals Company | Dallas, TX 75251 | Oil & Gas Operator | May 2021 |
| 287 | O'Neill Properties, LTD. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 288 | O.G.P. Operating, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2025 |
| 289 | Occidental Energy Marketing, Inc. | Houston, TX 77227 | Gas Operator | Sep 2015 |
| 290 | Occidental Permian LTD. | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 291 | Ogris Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 292 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 293 | Ovintiv USA Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 294 | Owl Ops LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 295 | Own Resources Operating LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Sep 2025 |
| 296 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 297 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 298 | P1 Energy, LLC | Judson, TX 75660 | Oil & Gas Operator | Dec 2025 |
| 299 | P4 Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 300 | Pace Production Co. | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2025 |