| 2301 | Click Energy Company | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 2302 | Clide Oil Corp. | Iraan, TX 79744 | Oil & Gas Operator | Nov 2015 |
| 2303 | Cliffwood Production Co. | Houston, TX 77090 | Oil & Gas Operator | Aug 2013 |
| 2304 | Clifton Oil | Muenster, TX 76252 | Oil & Gas Operator | Mar 2006 |
| 2305 | Clifton, B.W. | Graham, TX 76450 | Oil & Gas Operator | Mar 2000 |
| 2306 | Clifton, Joe B. Exploration, Inc | Pauls Valley, OK 73075 | Oil & Gas Operator | Mar 2008 |
| 2307 | Clipper Operating Co., Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 2000 |
| 2308 | CLM Operating | Graham, TX 76450 | Oil & Gas Operator | Aug 2017 |
| 2309 | Close, Bryan H. | Shamrock, TX 79079 | Gas Operator | Apr 2025 |
| 2310 | Clover Production Company | Sourlake, TX 77659 | Oil & Gas Operator | Apr 2025 |
| 2311 | CLR Gauging Corp. | Tuleta, TX 78162 | Oil & Gas Operator | Apr 2025 |
| 2312 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Apr 2025 |
| 2313 | CLS Interests, Incorporated | Austin, TX 78734 | Oil & Gas Operator | Jan 1997 |
| 2314 | CLS Petroleum Holdings LLC | Iowa Park, TX 76367 | Oil Operator | Apr 2025 |
| 2315 | Clsog L.C. | Houston, TX 77024 | Gas Operator | Jun 2008 |
| 2316 | CM Oil Co. | FT Stockton, TX 79735 | Oil & Gas Operator | Apr 2025 |
| 2317 | CM TX Production, LLC | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2023 |
| 2318 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2025 |
| 2319 | CMR Energy, L.P. | Houston, TX 77077 | Oil & Gas Operator | Apr 2025 |
| 2320 | CMS Nomeco Oil & Gas Co. | Jackson, MI 49201 | Oil & Gas Operator | Jan 2015 |
| 2321 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 2322 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 2323 | CNS Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2010 |
| 2324 | Co Energy | Benbrook, TX 76126 | Oil & Gas Operator | Apr 2025 |
| 2325 | Co-Co Oil, Inc. | Lubbock, TX 79407 | Oil & Gas Operator | Aug 2003 |
| 2326 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 2327 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 2328 | Coastal Bend Petroleum Corp. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Dec 2002 |
| 2329 | Coastal Derby Refining Co | Houston, TX 77046 | Oil Operator | Feb 1994 |
| 2330 | Coastal Expanse Oil & Gas | Austin, TX 78704 | Oil & Gas Operator | Apr 2025 |
| 2331 | Coastal Investments Inc. | El Campo, TX 77437 | Oil & Gas Operator | Apr 2025 |
| 2332 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 2333 | Coastal New Mexico MGMT LLC | Carlsbad, NM 88220 | Oil & Gas Operator | Apr 2025 |
| 2334 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 2335 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2025 |
| 2336 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | Apr 2025 |
| 2337 | Coastal Production Company, Inc. | El Campo, TX 77437 | Oil & Gas Operator | Aug 1995 |
| 2338 | Coastal Shoreline Corp. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Aug 2003 |
| 2339 | Coastland Operations, LLC | Dallas, TX 75287 | Oil & Gas Operator | Apr 2025 |
| 2340 | Coastline Exploration, Inc. | Stafford, TX 77477 | Oil & Gas Operator | Apr 2025 |
| 2341 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 2342 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 2343 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 2344 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Dec 2024 |
| 2345 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2025 |
| 2346 | Cobbs Brothers Oil & Gas | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Jun 2009 |
| 2347 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 2348 | Cobra Operating Company | Houston, TX 77002 | Oil & Gas Operator | Sep 2003 |
| 2349 | Cochise Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 2350 | Cockburn Oil Corporation | Lubbock, TX 79493 | Oil & Gas Operator | Jul 2005 |
| 2351 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Apr 2025 |
| 2352 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 2353 | Cody Company | Amarillo, TX 79121 | Oil & Gas Operator | Mar 2020 |
| 2354 | Cody Energy LLC | Houston, TX 77024 | Oil & Gas Operator | Jun 2020 |
| 2355 | Cody Energy, Inc. | Houston, TX 77077 | Oil & Gas Operator | Feb 2025 |
| 2356 | Cody Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Sep 2002 |
| 2357 | Coenergy Operating Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 2358 | Coert Holdings 1 LLC | Greenwich, CT 06830 | Oil & Gas Operator | Dec 2021 |
| 2359 | Cofer & Crawford | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 2360 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 2361 | COG Production LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2025 |
| 2362 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 2363 | Cohort Energy Company | Centennial, CO 80112 | Oil & Gas Operator | Feb 2007 |
| 2364 | Coker, Jonathan C., Inc. | Austin, TX 78746 | Oil Operator | Mar 2011 |
| 2365 | Coker, Nel Rey Daws | Throckmorton, TX 76483 | Oil & Gas Operator | Mar 2008 |
| 2366 | Coker, Tom | Seymour, TX 76380 | Oil & Gas Operator | Sep 2006 |
| 2367 | Cokinos, Inc. | Beaumont, TX 77701 | Oil & Gas Operator | Aug 2003 |
| 2368 | Colby Production Resources, LLC | Granbury, TX 76048 | Oil Operator | Apr 2025 |
| 2369 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 2370 | Cole, John Otis | Big Spring, TX 79721 | Oil & Gas Operator | Jan 1999 |
| 2371 | Coleman & Johnson Oil Company | Brownwood, TX 76801 | Oil & Gas Operator | Apr 2025 |
| 2372 | Coleman County Project | Coleman, TX 76834 | Oil & Gas Operator | Oct 2012 |
| 2373 | Coleman Oil & Gas Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2025 |
| 2374 | Coleman Oil & Gas Inc | Farmington, NM 87499 | Oil & Gas Operator | Jan 2023 |
| 2375 | Colemanite, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2025 |
| 2376 | Coleville Petroleum Company | McAllen, TX 78503 | Oil & Gas Operator | Mar 1996 |
| 2377 | Coley, H. B. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2000 |
| 2378 | Coley, Thomas | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 2379 | Colgate Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 2380 | Collier Oil Field Services Inc | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2025 |
| 2381 | Collier, Scott Inc. | Holliday, TX 76366 | Oil Operator | May 2003 |
| 2382 | Collier, W. D. Ranch | Post, TX 79356 | Oil & Gas Operator | Jan 2012 |
| 2383 | Collins & Ware, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 2384 | Collins Resources, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Mar 2011 |
| 2385 | Colo Construction Co., Inc. | Abilene, TX 79602 | Oil Operator | Apr 2004 |
| 2386 | Colo Exploration Company, Inc. | Benbrook, TX 76126 | Oil & Gas Operator | Apr 2025 |
| 2387 | Cologne Production Company | San Antonio, TX 78209 | Oil & Gas Operator | Nov 2014 |
| 2388 | Colorado Bluebonnet Energy Corp. | Englewood, CO 80112 | Oil & Gas Operator | Feb 2001 |
| 2389 | Colorado-Swanson Landing Oil & Gas, LLC | Kilgore, TX 75663 | Oil Operator | Apr 2025 |
| 2390 | Colotex Operating, LLC | Aurora, CO 80015 | Oil & Gas Operator | Apr 2025 |
| 2391 | Colt Oil & Gas Co. | Abilene, TX 79601 | Oil Operator | Apr 2004 |
| 2392 | Colt Oil Company | Andrews, TX 79714 | Oil & Gas Operator | Feb 1996 |
| 2393 | Colt Operating Corporation | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 2394 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
| 2395 | Columbia Energy Properties, Inc. | Baytown, TX 77521 | Oil & Gas Operator | Jul 2004 |
| 2396 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 2397 | Columbia Production Company | Edmond, OK 73083 | Oil & Gas Operator | May 2020 |
| 2398 | Columbus Energy Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2008 |
| 2399 | Columbus Energy, LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 2400 | Comac Well Service, Inc. | Borger, TX 79008 | Oil & Gas Operator | Mar 2008 |