| 2301 | Civron Petroleum Res., LLC | San Antonio, TX 78229 | Oil & Gas Operator | Feb 2026 |
| 2302 | CJRW Oil & Gas | MC Camey, TX 79752 | Oil Operator | Feb 2026 |
| 2303 | CK Operating Company, LLC | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 2304 | CK5 Services LLC | Zephyr, TX 76890 | Oil & Gas Operator | Sep 2025 |
| 2305 | CKB Corporation | Borger, TX 79008 | Oil & Gas Operator | Aug 1997 |
| 2306 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 2307 | Clamp Operating | San Antonio, TX 78264 | Oil & Gas Operator | Apr 2002 |
| 2308 | Clamp Operating Incorporated | San Antonio, TX 78264 | Oil & Gas Operator | Mar 2011 |
| 2309 | Clark Oil Co. | Dallas, TX 75360 | Oil & Gas Operator | Feb 2026 |
| 2310 | Clark Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 2311 | Clark Operating Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 2312 | Clark, B. C. | Cross Plains, TX 76443 | Oil Operator | Dec 2007 |
| 2313 | Clark, G. A., Trustee | San Antonio, TX 78210 | Oil & Gas Operator | Nov 2017 |
| 2314 | Clark, John M. | Midland, TX 79701 | Oil & Gas Operator | Dec 1993 |
| 2315 | Clark, John M., Inc. | Midland, TX 79704 | Oil & Gas Operator | Feb 2026 |
| 2316 | Clark, Richard E., Inc. | Longview, TX 75604 | Oil & Gas Operator | May 2001 |
| 2317 | Claron Corporation | Houston, TX 77219 | Oil & Gas Operator | Feb 2026 |
| 2318 | Classic Energy Incorporated | Tyler, TX 75701 | Oil & Gas Operator | Jul 2005 |
| 2319 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 2320 | Classic Operating Co. LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 2321 | Classic Petroleum Partners, Inc. | Whitehouse, TX 75791 | Oil & Gas Operator | Feb 2026 |
| 2322 | Claude-Maggie Co. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 2323 | Clausen, A. G. | Cross Plains, TX 76443 | Oil & Gas Operator | Feb 2026 |
| 2324 | Clavo Oil, LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 2325 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 2326 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 2327 | Clay, Charles E. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2010 |
| 2328 | Clay, Jerry H. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2006 |
| 2329 | Clayton Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | May 2004 |
| 2330 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 2331 | CLC Operations Inc | Midland, TX 79701 | Oil & Gas Operator | Mar 1997 |
| 2332 | Cleantex Oilfield Services, LLC | Tyler, TX 75702 | Oil Operator | Feb 2026 |
| 2333 | Clear Brooke Ranches, LLC | Fort Worth, TX 76179 | Oil & Gas Operator | Feb 2026 |
| 2334 | Clear Fork Gas Company | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 2335 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 2336 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 2337 | Clearfork Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2011 |
| 2338 | Clearfork Petroleum Inc. (A) | Lubbock, TX 79408 | Oil & Gas Operator | Feb 2026 |
| 2339 | Clearfork Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 2340 | Clearly Petroleum, LLC | Houston, TX 77086 | Oil & Gas Operator | Jun 2020 |
| 2341 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 2342 | Clements Exploration Co | Oklahoma City, OK 73132-5922 | Oil & Gas Operator | Jan 2006 |
| 2343 | Clements Operating Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 2344 | Clemons, Tony W. | Minden, LA 71055 | Oil & Gas Operator | Dec 2016 |
| 2345 | Cleo Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 1997 |
| 2346 | Cleveland Oil & Gas | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 2347 | Cleveland Oil Company,L.L.C.,The | Midland, TX 79702 | Oil & Gas Operator | Sep 1999 |
| 2348 | Cleveland Production Company | Summit, MS 39666 | Oil & Gas Operator | Jul 1999 |
| 2349 | Click Corp | Monroe, LA 71207 | Oil & Gas Operator | Jan 2025 |
| 2350 | Click Energy Company | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 2351 | Clide Oil Corp. | Iraan, TX 79744 | Oil & Gas Operator | Nov 2015 |
| 2352 | Cliffwood Production Co. | Houston, TX 77090 | Oil & Gas Operator | Aug 2013 |
| 2353 | Clifton Oil | Muenster, TX 76252 | Oil & Gas Operator | Mar 2006 |
| 2354 | Clifton, B.W. | Graham, TX 76450 | Oil & Gas Operator | Mar 2000 |
| 2355 | Clifton, Joe B. Exploration, Inc | Pauls Valley, OK 73075 | Oil & Gas Operator | Mar 2008 |
| 2356 | Clipper Operating Co., Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 2000 |
| 2357 | CLM Operating | Graham, TX 76450 | Oil & Gas Operator | Aug 2017 |
| 2358 | Close, Bryan H. | Shamrock, TX 79079 | Gas Operator | Feb 2026 |
| 2359 | Clover Production Company | Sourlake, TX 77659 | Oil & Gas Operator | Feb 2026 |
| 2360 | CLR Gauging Corp. | Tuleta, TX 78162 | Oil & Gas Operator | Feb 2026 |
| 2361 | CLR Secondary Recovery, LLC | Wichita Falls, TX 76306 | Oil & Gas Operator | Feb 2026 |
| 2362 | CLS Interests, Incorporated | Austin, TX 78734 | Oil & Gas Operator | Jan 1997 |
| 2363 | CLS Petroleum Holdings LLC | Iowa Park, TX 76367 | Oil Operator | Feb 2026 |
| 2364 | Clsog L.C. | Houston, TX 77024 | Gas Operator | Jun 2008 |
| 2365 | CM Oil Co. | FT Stockton, TX 79735 | Oil & Gas Operator | Feb 2026 |
| 2366 | CM TX Production, LLC | Lakewood, CO 80228 | Oil & Gas Operator | Feb 2023 |
| 2367 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 2368 | CMR Energy, L.P. | Houston, TX 77077 | Oil & Gas Operator | Feb 2026 |
| 2369 | CMR Oil, LLC | McKinney, TX 75072 | Oil Operator | Feb 2026 |
| 2370 | CMS Nomeco Oil & Gas Co. | Jackson, MI 49201 | Oil & Gas Operator | Jan 2015 |
| 2371 | CMS Oil And Gas Company | Jackson, MI 49201 | Oil & Gas Operator | Oct 2002 |
| 2372 | CNG Producing Company | New Orleans, LA 70112 | Oil & Gas Operator | Dec 2015 |
| 2373 | CNS Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2010 |
| 2374 | Co Energy | Benbrook, TX 76126 | Oil & Gas Operator | Feb 2026 |
| 2375 | Co-Co Oil, Inc. | Lubbock, TX 79407 | Oil & Gas Operator | Aug 2003 |
| 2376 | Co-Sha Investments | Fritch, TX 79036 | Oil & Gas Operator | Feb 2026 |
| 2377 | Coal Creek Energy, LLC | Overland Park, KS 66221 | Oil Operator | Dec 2019 |
| 2378 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 2379 | Coastal Bend Petroleum Corp. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Dec 2002 |
| 2380 | Coastal Expanse Oil & Gas | Austin, TX 78704 | Oil & Gas Operator | Feb 2026 |
| 2381 | Coastal Investments Inc. | El Campo, TX 77437 | Oil & Gas Operator | Feb 2026 |
| 2382 | Coastal Management Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 2383 | Coastal New Mexico MGMT LLC | Carlsbad, NM 88220 | Oil & Gas Operator | Feb 2026 |
| 2384 | Coastal Oil & Gas Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 2385 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2026 |
| 2386 | Coastal Plains Exploration, LLC | Port Lavaca, TX 77979 | Oil & Gas Operator | Feb 2026 |
| 2387 | Coastal Production Company, Inc. | El Campo, TX 77437 | Oil & Gas Operator | Aug 1995 |
| 2388 | Coastal Shoreline Corp. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Aug 2003 |
| 2389 | Coastland Operations, LLC | Dallas, TX 75287 | Oil & Gas Operator | Feb 2026 |
| 2390 | Coastline Exploration, Inc. | Stafford, TX 77477 | Oil & Gas Operator | Feb 2026 |
| 2391 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 2392 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 2393 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 2394 | Cobalt Energy LLC | Wichita, KS 67202 | Oil & Gas Operator | Sep 2025 |
| 2395 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Feb 2025 |
| 2396 | Cobbs Brothers Oil & Gas | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Jun 2009 |
| 2397 | Coblan Operating Company | Midland, TX 79705 | Oil & Gas Operator | Jul 1996 |
| 2398 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 2399 | Cobra Operating Company | Houston, TX 77002 | Oil & Gas Operator | Sep 2003 |
| 2400 | Cochise Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |