| 201 | Heights Energy Corporation | Plano, TX 75026 | Oil & Gas Operator | May 2024 |
| 202 | Helms Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 203 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 204 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | May 2024 |
| 205 | HGN Operating Co Inc | Abilene, TX 79604 | Oil & Gas Operator | Jul 2014 |
| 206 | Highpeak Energy Holdings, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | May 2024 |
| 207 | Hillin Prod. Co. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2002 |
| 208 | Hillside Oil & Gas, Inc. | Midland, TX 79708 | Oil & Gas Operator | Nov 1999 |
| 209 | Holly Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Nov 2008 |
| 210 | Honeck Oil Company | Austin, TX 78716 | Oil & Gas Operator | Mar 2008 |
| 211 | Honeck Oil Company, LP | Austin, TX 78716 | Oil & Gas Operator | Dec 2010 |
| 212 | Horizon Oil & Gas Co. | Dallas, TX 75221 | Oil & Gas Operator | Jan 2005 |
| 213 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 214 | Howell Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Oct 2015 |
| 215 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | May 2024 |
| 216 | Huffman, H. L., LTD. | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 1994 |
| 217 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 218 | HW Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2024 |
| 219 | Ingram, J. Oil & Gas, Inc. | Plano, TX 75074 | Oil & Gas Operator | May 2024 |
| 220 | Ira Testers | Ira, TX 79527 | Oil & Gas Operator | May 2024 |
| 221 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | May 2024 |
| 222 | Jla Resources Company | Austin, TX 78746 | Oil & Gas Operator | May 2024 |
| 223 | Jo Mill Oil Company LLC | Fort Worth, TX 76132 | Oil & Gas Operator | May 2024 |
| 224 | Journey Operating, L.L.C. | Sugar Land, TX 77496 | Oil & Gas Operator | Aug 2006 |
| 225 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 226 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2024 |
| 227 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 228 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2024 |
| 229 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2023 |
| 230 | Kerry Petroleum Co Inc | Midland, TX 79708 | Oil & Gas Operator | Jun 2010 |
| 231 | Kestrel Resources, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Jan 2017 |
| 232 | Kidd Oil & Gas, LC | Dallas, TX 75219 | Oil & Gas Operator | Apr 1999 |
| 233 | Killer Rabbit Fields LLC | Monahans, TX 79756 | Oil & Gas Operator | May 2024 |
| 234 | Kimball Production Co. | Houston, TX 77042 | Oil & Gas Operator | Jul 2002 |
| 235 | Kinder Morgan Co2 Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 236 | Kinder Morgan Production Co LLC | Midland, TX 79705 | Oil & Gas Operator | May 2024 |
| 237 | Kinder Morgan Production Co LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2007 |
| 238 | King Operating Corporation | Pampa, TX 79066 | Oil & Gas Operator | May 2024 |
| 239 | Knox Industries, Inc. | Arlington, TX 76012 | Oil & Gas Operator | May 2024 |
| 240 | Koch Exploration Company, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 241 | KRF Production Company LLC | Austin, TX 78746 | Oil & Gas Operator | May 2024 |
| 242 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | May 2024 |
| 243 | Laguna Petroleum Company | Casper, WY 82601 | Oil & Gas Operator | Dec 1982 |
| 244 | Laguna Petroleum Corporation | Houston, TX 77046 | Oil & Gas Operator | May 2024 |
| 245 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 246 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 247 | Laredo Petroleum, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 248 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | May 2024 |
| 249 | Legacy Reserves Operating LP | Denver, CO 80202 | Oil & Gas Operator | May 2024 |
| 250 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 251 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 252 | Lomak Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1998 |
| 253 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 254 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 255 | Lynx Operating Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | May 2024 |
| 256 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Jan 2024 |
| 257 | Magnum Engineering Company | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2024 |
| 258 | Manti Exploration Operating LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Feb 2015 |
| 259 | Manti Operating Company | Covington, LA 70435 | Oil & Gas Operator | May 2024 |
| 260 | Manzano LLC | Roswell, NM 88202 | Oil & Gas Operator | May 2024 |
| 261 | Manzano Oil Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2005 |
| 262 | Maralo, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1998 |
| 263 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Mar 2024 |
| 264 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 265 | Marshfield Oil & Gas, LLC | Houston, TX 77070 | Oil & Gas Operator | May 2024 |
| 266 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 267 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 268 | McAlester Fuel Co | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 269 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 270 | McBee Operating Company, L.L.C. | Dallas, TX 75209 | Oil & Gas Operator | May 2024 |
| 271 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 272 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 273 | McDonald Production, LLC | Lubbock, TX 79408 | Oil Operator | May 2024 |
| 274 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 275 | McShane, J. Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2004 |
| 276 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 277 | Meridian Interests, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Aug 2003 |
| 278 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 279 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | May 2024 |
| 280 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 281 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 282 | Middle Bay Oil Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 283 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 284 | Midland Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 285 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | May 2024 |
| 286 | Midland TMG Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2017 |
| 287 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 288 | Mna Enterprises LTD. Co. | Hobbs, NM 88242 | Oil & Gas Operator | May 2024 |
| 289 | Mobil Producing TX. & N.M. Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2024 |
| 290 | Montex Exploration Company | Houston, TX 77057 | Oil & Gas Operator | Mar 2011 |
| 291 | Moody Oil Co. | Pearsall, TX 78061 | Oil & Gas Operator | May 2024 |
| 292 | Morrow Resources, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2004 |
| 293 | Mosbacher Energy Company | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 294 | Mulloy Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2024 |
| 295 | Murchison Oil & Gas Inc | Plano, TX 75024 | Oil & Gas Operator | Feb 2024 |
| 296 | Murchison Oil And Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | May 2024 |
| 297 | Murjo Oil & Royalty Company | Fort Worth, TX 76121 | Oil & Gas Operator | Jan 2024 |
| 298 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | May 2024 |
| 299 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | May 2024 |
| 300 | NBL Permian LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2018 |