| 5201 | Cavillo Oil Corporation | Marshall, TX 75670 | Oil & Gas Operator | Jun 1998 |
| 5202 | Cavins Oilfield Services, LLC. | | Oil Operator | Apr 2006 |
| 5203 | Caw Prop LP | Dayton, PA 16222-1624 | Gas Operator | Dec 2024 |
| 5204 | Cawell Energy, LLC | Spring, TX 77379 | Oil Operator | Dec 2025 |
| 5205 | Cayman Exploration Corp | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 5206 | Cayman Resources Corporation | Tulsa, OK 74119-1323 | Oil & Gas Operator | Jun 2001 |
| 5207 | Caza Exploration Company | | Oil Operator | Nov 1991 |
| 5208 | Caza Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 5209 | Cazador Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 5210 | Cazar Energy Inc | Austin, TX 78734 | Oil & Gas Operator | Dec 2025 |
| 5211 | CB Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2017 |
| 5212 | CB Oil Company | Drumright, OK 74030 | Oil & Gas Operator | Jul 2025 |
| 5213 | Cbase Corporation | | Oil & Gas Operator | Sep 2025 |
| 5214 | CBL Resources LLC | Tulsa, OK 74136-6308 | Oil & Gas Operator | Oct 2025 |
| 5215 | CBM Gas Company LLC | Dewey, OK 74029 | Oil & Gas Operator | Aug 2020 |
| 5216 | CBM Partners Corporation | Overland Park, KS 66221 | Oil Operator | Aug 2015 |
| 5217 | Cbmoncrief Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 5218 | CBN Operating Corp. | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 5219 | Cbo Oil And Gas, LLC | Stillwater, OK 74075-8793 | Oil & Gas Operator | Oct 2025 |
| 5220 | CBR Oil Company | Lytle, TX 78052 | Oil & Gas Operator | Jul 1997 |
| 5221 | CBS Energy LLC | Oklahoma City, OK 73142-4437 | Oil & Gas Operator | Oct 2025 |
| 5222 | CBS Operating Corp | Midland, TX 79702 | Oil & Gas Operator | Aug 2012 |
| 5223 | CCF, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Apr 1998 |
| 5224 | CCGM Exploration & Prod.,L.C. | Austin, TX 78738 | Oil & Gas Operator | Dec 2025 |
| 5225 | Cci East Texas Upstream LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2021 |
| 5226 | Cci Gulf Coast Upstream LLC | Teague, TX 75860 | Oil & Gas Operator | Mar 2021 |
| 5227 | Cci Robinson'S Bend LLC | | Gas Operator | Sep 2025 |
| 5228 | CCM Enterprises, Inc | | Oil & Gas Operator | Oct 1985 |
| 5229 | CCRP Operating Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2024 |
| 5230 | CCS Investments Inc | Bartlesville, OK 74006-1941 | Oil Operator | Aug 2025 |
| 5231 | CCV, Inc. | Houston, TX 77019 | Oil & Gas Operator | Sep 1994 |
| 5232 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Dec 2025 |
| 5233 | CD Resources Company | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2002 |
| 5234 | CDC Operating Company | Dallas, TX 75218 | Oil & Gas Operator | Dec 2025 |
| 5235 | CDG Inc | Sapulpa, OK 74066-6339 | Oil Operator | Oct 2020 |
| 5236 | CDJ Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Jul 2025 |
| 5237 | CDM Oil & Gas | | Oil & Gas Operator | Apr 2017 |
| 5238 | CDS Oil Company | Tulsa, OK 74147-1514 | Oil & Gas Operator | Mar 2015 |
| 5239 | CDX Gas, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2009 |
| 5240 | CDX Rio, LLC | Farmington, NM 87401 | Oil & Gas Operator | Aug 2009 |
| 5241 | Cec Operations LLC | Udall, KS 67146 | Oil & Gas Operator | Jun 2025 |
| 5242 | Cecil Brand | | Oil & Gas Operator | Mar 2002 |
| 5243 | Cecil Lee'S Co | Tatum, NM 88267 | Oil Operator | Jan 2003 |
| 5244 | Cedar Bend Oil Company | Colorado City, TX 79512 | Oil & Gas Operator | Dec 2025 |
| 5245 | Cedar Creek Consulting Inc | | Oil Operator | Jan 2025 |
| 5246 | Cedar Grove Energy Corp. | | Oil Operator | Sep 2009 |
| 5247 | Cedar Grove Missionary Baptist Church | Cheektowaga, NY 14225 | Gas Operator | Dec 2024 |
| 5248 | Cedar Oil Company | Midland, TX 79707 | Oil & Gas Operator | Dec 2025 |
| 5249 | Cedar Point Oil Company | Baytown, TX 77520 | Oil & Gas Operator | Aug 2003 |
| 5250 | Cedar Resources Corporation | Gillette, WY 82717 | Gas Operator | Dec 2010 |
| 5251 | Cedar Ridge Energy, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 5252 | Cedar Ridge Operating Co LLC | Durango, CO 81303 | Gas Operator | Dec 2009 |
| 5253 | Cedar Valley Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2021 |
| 5254 | Cedarhill Operating Company, L.L.C. | | Oil Operator | Dec 2007 |
| 5255 | Cedyco Corporation | Houston, TX 77227 | Oil & Gas Operator | Nov 2008 |
| 5256 | Cegx Of Texas LLC | Eastland, TX 76448 | Oil Operator | Mar 2018 |
| 5257 | Ceh Operating LLC | | Oil & Gas Operator | Sep 2025 |
| 5258 | Cei Operating LLC | Katy, TX 77449 | Oil & Gas Operator | Dec 2025 |
| 5259 | Cei Petroleum Inc | Tulsa, OK 74103-4141 | Oil & Gas Operator | Jul 2016 |
| 5260 | Cei Production Company | Dallas, TX 75225 | Oil & Gas Operator | Sep 1998 |
| 5261 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Oct 2025 |
| 5262 | Ceka Gas, Div Of GTC | | Oil & Gas Operator | May 1988 |
| 5263 | Cel Properties LLC | | Oil & Gas Operator | Jan 2025 |
| 5264 | Celero Energy II, LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 5265 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 5266 | Celeron Oil & Gas Company | | Oil & Gas Operator | Dec 1987 |
| 5267 | Celsius Energy Company | Denver, CO 80202-1558 | Oil & Gas Operator | Mar 2000 |
| 5268 | Celt Oil, Inc. | | Oil & Gas Operator | Jun 1986 |
| 5269 | Cemco Oil | Corsicana, TX 75110 | Oil & Gas Operator | Dec 2025 |
| 5270 | Cemco Operating Inc | Bartlet, OH 45713 | Oil & Gas Operator | Dec 2005 |
| 5271 | Cemco-Edison No. 1 (F.R.) Partnership | | Oil & Gas Operator | Dec 2000 |
| 5272 | Cement Oil Company | Cement, OK 73017-9234 | Oil & Gas Operator | Sep 2025 |
| 5273 | Cemoil Inc | Cement, OK 73017-0563 | Oil & Gas Operator | Sep 2025 |
| 5274 | Cen Cal Drilling Inc. | | Oil & Gas Operator | Dec 1994 |
| 5275 | Cenco, Inc. | | Oil & Gas Operator | Mar 2022 |
| 5276 | Cenergy Exploration Company | Dallas, TX 75231 | Oil & Gas Operator | Sep 2000 |
| 5277 | Cenergy Resources LLC | | Oil & Gas Operator | Oct 2025 |
| 5278 | Cenestia Energy Inc | | Oil & Gas Operator | Dec 1998 |
| 5279 | Cenex | | Oil & Gas Operator | Dec 1996 |
| 5280 | Cenex Inc. | | Oil & Gas Operator | Dec 1994 |
| 5281 | Ceniza Petroleum, Inc. | Portland, TX 78374 | Oil & Gas Operator | Dec 2025 |
| 5282 | Cenla Oil Company, LLC | | Oil Operator | Dec 2024 |
| 5283 | Cenpat Operating LLC | Houston, TX 77042-3044 | Oil & Gas Operator | Sep 2025 |
| 5284 | Centaur Exploration LLC | Evanston, WY 82931 | Oil & Gas Operator | Dec 2025 |
| 5285 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2025 |
| 5286 | Centaur Resources Inc | Oklahoma City, OK 73142-6804 | Oil & Gas Operator | Oct 2025 |
| 5287 | Centennial Energy | Thermopolis, WY 82443 | Oil & Gas Operator | Sep 2025 |
| 5288 | Centennial Energy Company | Torrance, CA 90503 | Oil Operator | Jan 2000 |
| 5289 | Centennial Energy Corp. | Big Lake, TX 76932 | Oil & Gas Operator | Jan 1997 |
| 5290 | Centennial Exploration, Inc. | | Oil & Gas Operator | Dec 1985 |
| 5291 | Centennial Resource Prod, LLC | Denver, CO 80202 | Oil & Gas Operator | Aug 2023 |
| 5292 | Centennial Resources Inc | Drumright, OK 74030-1234 | Oil & Gas Operator | Dec 2007 |
| 5293 | Center Dean Dba Center Operating Co | | Oil & Gas Operator | Jul 2003 |
| 5294 | Center Junction Corp | | Oil Operator | Mar 2009 |
| 5295 | Center Oil Company | Ada, OK 74821-0584 | Oil Operator | May 2003 |
| 5296 | Center Production Company LLC | Ada, OK 74820 | Oil Operator | Aug 2025 |
| 5297 | Center Start, LC | Kilgore, TX 75663 | Oil & Gas Operator | May 2008 |
| 5298 | Centerfire Resources | Springerville, AZ 85938 | Oil & Gas Operator | Dec 2025 |
| 5299 | Centergate Resources LLC | | Oil & Gas Operator | Dec 2024 |
| 5300 | Centerpoint Energy FLD Ser Inc | | Oil Operator | Feb 2011 |