| 5201 | HRH Energy Group Incorporated | Carrollton, TX 75006 | Oil & Gas Operator | Nov 2009 |
| 5202 | Hronek, Kenneth | Caldwell, TX 77836 | Oil & Gas Operator | Oct 2025 |
| 5203 | Hrubetz Oil Co. | Dallas, TX 75225 | Oil Operator | Sep 1986 |
| 5204 | Hrubetz Operating Company | Dallas, TX 75225 | Oil & Gas Operator | Feb 1999 |
| 5205 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 5206 | Hub-Cap Oil Company | Arlington, TX 76016 | Oil & Gas Operator | Dec 2013 |
| 5207 | Hubbard Operating | Ozona, TX 76943 | Gas Operator | Oct 2025 |
| 5208 | Hubcap Oil, LLC | Boerne, TX 78015 | Oil Operator | Oct 2025 |
| 5209 | Hubco Exploration Inc. | Houston, TX 77073 | Oil & Gas Operator | Sep 2002 |
| 5210 | Huber Energy L.P. | Houston, TX 77079 | Oil & Gas Operator | Feb 2007 |
| 5211 | Huber Energy Panhandle LP | Houston, TX 77079 | Oil & Gas Operator | Oct 2005 |
| 5212 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Oct 2025 |
| 5213 | Hudgens Operating Co., Inc. | Abilene, TX 79603 | Oil & Gas Operator | Jul 1995 |
| 5214 | Hudson Brothers Mining Co., Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jun 1994 |
| 5215 | Hudson, Comer Oil & Gas | Cisco, TX 76437 | Oil & Gas Operator | Jan 2003 |
| 5216 | Huff Minerals, LTD. | Amarillo, TX 79101 | Gas Operator | Oct 2025 |
| 5217 | Huff, Jack | Midland, TX 79710 | Oil & Gas Operator | Dec 2004 |
| 5218 | Huffman, H. L., LTD. | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 1994 |
| 5219 | Hufo Production Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2002 |
| 5220 | Huggs Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2003 |
| 5221 | Hughes & Patterson Oper. Corp. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 5222 | Hughes & Shawver | Olney, TX 76374 | Oil & Gas Operator | Aug 1996 |
| 5223 | Hughes Legacy LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2022 |
| 5224 | Hughes Oil Company Inc | Odessa, TX 79765 | Oil & Gas Operator | Feb 2004 |
| 5225 | Hughes Supplies, Inc. | Greenwood, LA 71033 | Oil & Gas Operator | Jul 2019 |
| 5226 | Hughes, Bill Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 5227 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 5228 | Hughes, Dan A. Company | Beeville, TX 78104 | Oil & Gas Operator | May 2006 |
| 5229 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | Oct 2025 |
| 5230 | Hughey, Gaylord T. SR. Oper. Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 1998 |
| 5231 | Hughey, W. R., Operating Co. | Tyler, TX 75711 | Oil & Gas Operator | Feb 2005 |
| 5232 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 5233 | Hugoton Operating Company, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 5234 | Hugus Investment Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |
| 5235 | Hulen Operating Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Oct 2025 |
| 5236 | Hull Oil Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2021 |
| 5237 | Hulse, J. T. | Archer City, TX 76351 | Oil & Gas Operator | Oct 2025 |
| 5238 | Hulse, Tommy P. | Archer City, TX 76351 | Oil & Gas Operator | Feb 2009 |
| 5239 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 5240 | Hulsey Oil Company | Dallas, TX 75205 | Oil & Gas Operator | Aug 1999 |
| 5241 | Humak Processors, Inc. | Tyler, TX 75710 | Oil & Gas Operator | Aug 2005 |
| 5242 | Humber Oil Company | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 5243 | Humble Oil & Refining Co. | Houston, TX 77252 | Oil & Gas Operator | Jan 2000 |
| 5244 | Humphrey, Thos.D. Oil Prop.,Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Aug 1999 |
| 5245 | Humphrey-Bashford Oil, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2010 |
| 5246 | Hunt Cimarron LTD. Partnership | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |
| 5247 | Hunt Industries, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2000 |
| 5248 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 5249 | Hunt Operating, LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 5250 | Hunt Petroleum (Aec), Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 5251 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 5252 | Hunt, Hassie Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 5253 | Hunt, WM. Herbert, Trust Est. | Dallas, TX 75201 | Oil & Gas Operator | Sep 1998 |
| 5254 | Hunter & Hedrick Production, Inc | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Dec 1995 |
| 5255 | Hunter & McDonald | Wichita Falls, TX 76309 | Oil & Gas Operator | Jul 2001 |
| 5256 | Hunter Brothers | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2007 |
| 5257 | Hunter Energy, Inc. | Hurst, TX 76053 | Oil & Gas Operator | Oct 2025 |
| 5258 | Hunter Oil & Gas Co. | Bangs, TX 76823 | Oil & Gas Operator | Oct 2025 |
| 5259 | Hunter Oil Corporation | Gruver, TX 79040 | Gas Operator | Oct 2025 |
| 5260 | Hunter Petroleum Inc. | Alice, TX 78333 | Oil & Gas Operator | May 2014 |
| 5261 | Hunter, Rocquelle | Coleman, TX 76834 | Oil Operator | Oct 2025 |
| 5262 | Hunters Creek Oil & Gas | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 5263 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Oct 2025 |
| 5264 | Huntington Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2006 |
| 5265 | Huntland Properties, LTD. | Santa Anna, TX 76878 | Oil & Gas Operator | Oct 2025 |
| 5266 | Huntwood Resources, LLC | Huntsville, TX 77340 | Oil Operator | Oct 2025 |
| 5267 | Hurd Ent.LTD/U.S.Enercorp,LLC | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2002 |
| 5268 | Hurd Enterprises, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 5269 | Hurley Petroleum Corporation | Baton Rouge, LA 70821 | Oil & Gas Operator | Feb 2000 |
| 5270 | Hurricane Oil And Gas Co., Inc. | Houston, TX 77057 | Oil & Gas Operator | Mar 2008 |
| 5271 | Hurst Oil & Gas, Inc. | Hillsboro, TX 76645 | Oil & Gas Operator | Dec 2024 |
| 5272 | Husfeld, Rose Marie | Bowie, TX 76230 | Oil & Gas Operator | Aug 2017 |
| 5273 | Husfeld, Walter H. | Bowie, TX 76230 | Oil & Gas Operator | Jun 2007 |
| 5274 | Huson Corp. | Albany, TX 76430 | Oil & Gas Operator | May 2003 |
| 5275 | Huston Minerals LP | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 5276 | Huston Oil | Woodson, TX 76491 | Oil & Gas Operator | Oct 2010 |
| 5277 | HW Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 5278 | HWH Production, LLC | Muenster, TX 76252 | Oil Operator | Oct 2025 |
| 5279 | Hy-Tech, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Feb 2017 |
| 5280 | Hyalite Energy Corporation | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 5281 | Hybrid Operating, Incorporated | Carlsbad, CA 92009 | Oil & Gas Operator | Oct 2025 |
| 5282 | Hydroc Oil Company | Borger, TX 79007 | Oil & Gas Operator | May 2012 |
| 5283 | Hydrocarbon Horizons, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Jun 2023 |
| 5284 | Hydrocarbon Lease Management LTD | Addison, TX 75001 | Oil & Gas Operator | Jul 2002 |
| 5285 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 5286 | Hydrocarbon Operating, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 5287 | Hydrogeo, L.L.C. | Houston, TX 77074 | Oil & Gas Operator | Oct 2025 |
| 5288 | Hyer,Na & CJ Aldenhoven Trusts | Lipan, TX 76462 | Gas Operator | Oct 2017 |
| 5289 | Hyperion Energy LP | Dallas, TX 75206 | Oil & Gas Operator | May 2014 |
| 5290 | Hyperion Oil & Gas LLC | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 5291 | Hyquest Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2015 |
| 5292 | I & L Development Co. | Dallas, TX 75219 | Oil & Gas Operator | Mar 1996 |
| 5293 | I.T. Corporation | Arlington, TX 76016 | Oil & Gas Operator | Oct 2025 |
| 5294 | Ibc Petroleum, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Oct 2025 |
| 5295 | Ibex Resources I, L.P. | Midland, TX 79701 | Oil & Gas Operator | Jul 1999 |
| 5296 | Ibex Resources Operating LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2007 |
| 5297 | Ibex Resources, LLC | Austin, TX 78751 | Oil & Gas Operator | Jul 1999 |
| 5298 | Ica Energy Operating, L.L.C. | Odessa, TX 79760 | Oil & Gas Operator | Oct 2025 |
| 5299 | Icarus Operating Corporation | Spring, TX 77393 | Oil & Gas Operator | Oct 2025 |
| 5300 | Ice Brothers, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Jul 2024 |