| 2301 | Corona Operating, LLC | Midland, TX 79702 | Oil Operator | Apr 2025 |
| 2302 | Coronado Energy E&P Company, LLC | Houston, TX 77252 | Oil & Gas Operator | Dec 2010 |
| 2303 | Coronado Energy Partners LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 2304 | Coronado Great Plains LLC | Tulsa, OK 74137-2832 | Gas Operator | Apr 2013 |
| 2305 | Coronado Kansas, LLC | Tulsa, OK 74133 | Oil Operator | Oct 2009 |
| 2306 | Coronado Minerals, LLC | Houston, TX 77208 | Oil & Gas Operator | Apr 2025 |
| 2307 | Coronado Oil | Lindsborg, KS 67456 | Oil Operator | Sep 1985 |
| 2308 | Coronado Oil & G | | Oil Operator | Dec 1996 |
| 2309 | Coronado Oil & Gas, Inc. | Great Bend, KS 67530 | Oil Operator | Jul 2004 |
| 2310 | Coronado Oil & Minerals Co. | | Oil & Gas Operator | Sep 1980 |
| 2311 | Coronado Oil Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2019 |
| 2312 | Coronado Oil, Inc. | Salina, KS 67401 | Oil Operator | May 1990 |
| 2313 | Coronado Oklahoma LLC | Tulsa, OK 74133-7036 | Gas Operator | Apr 2020 |
| 2314 | Coronado Petroleum Corporation | Oklahoma City, OK 73102-4803 | Oil & Gas Operator | Jan 2025 |
| 2315 | Corpening, Joe F. | Bowie, TX 76230 | Oil & Gas Operator | Oct 2013 |
| 2316 | Corpus Christi Leaseholds, Inc. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 1996 |
| 2317 | Corpus Christi Oil & Gas Co. | | Oil & Gas Operator | Dec 1991 |
| 2318 | Correll, Spencer | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 2319 | Corrida Oil Inc | Denver, CO 80217 | Oil & Gas Operator | Jun 1990 |
| 2320 | Corriente Operating Company LLC | Taft, TX 78390 | Oil & Gas Operator | Apr 2025 |
| 2321 | Corsa Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 2322 | Corsair Energy, LC | Wichita, KS 67202 | Oil & Gas Operator | Apr 2004 |
| 2323 | Corsicana Crude Company, LLC | Denver, CO 80202 | Oil Operator | Apr 2025 |
| 2324 | Corsicana Crude Holdings, LLC | Denver, CO 80202 | Oil Operator | Apr 2025 |
| 2325 | Corsicana Field Fund | Corsicana, TX 75110 | Oil & Gas Operator | Dec 1993 |
| 2326 | Corsicana Oil & Gas | Corsicana, TX 75151 | Oil Operator | Apr 2025 |
| 2327 | Cortam, Inc. | Augusta, KS 67010 | Oil Operator | Dec 2024 |
| 2328 | Corterra Energy Operating LLC | Tulsa, OK 74119-4844 | Oil & Gas Operator | Aug 2021 |
| 2329 | Cortex Energy, Inc. | Wichita, KS 67217 | Oil & Gas Operator | Dec 2024 |
| 2330 | Cortez Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2016 |
| 2331 | Cortland Energy Co Inc | Worthington, OH 43085 | Oil & Gas Operator | Dec 2024 |
| 2332 | Corum Operating Company, LLC | Houston, TX 77055 | Oil & Gas Operator | Apr 2025 |
| 2333 | Corum Production Co.-Tepco | | Oil & Gas Operator | Dec 1989 |
| 2334 | Corum Production Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 2335 | Corvette Oil Corporation | Fort Worth, TX 76115 | Oil & Gas Operator | Mar 2008 |
| 2336 | Corvin Craig | Jenks, OK 74037-0516 | Oil Operator | Feb 2012 |
| 2337 | Corwin, B. V. | Enid, OK 73701 | Oil & Gas Operator | Apr 2017 |
| 2338 | Cory, Kenneth W. | Bellaire, TX 77401 | Oil & Gas Operator | Mar 2012 |
| 2339 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2025 |
| 2340 | Coseka Resources USA LTD | Denver, CO 80202-1602 | Oil & Gas Operator | Jun 1988 |
| 2341 | Cosgriff Joe | Detroit, MI 48208 | Oil & Gas Operator | Dec 1998 |
| 2342 | Coshocton Pipe Co | Columbus, OH 43229 | Oil & Gas Operator | Dec 1989 |
| 2343 | Costa Energy, LLC | Irving, TX 75063 | Oil & Gas Operator | Apr 2025 |
| 2344 | Costa Loma LTD. | | Oil & Gas Operator | Dec 2024 |
| 2345 | Costa Resources, Inc. | Dallas, TX 75209 | Oil & Gas Operator | Aug 2003 |
| 2346 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 2347 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 2348 | Coteau Energy LLC | | Oil & Gas Operator | Dec 2024 |
| 2349 | Coterra Energy Inc | Pittsburgh, PA 15275-1121 | Oil & Gas Operator | Feb 2025 |
| 2350 | Coterra Energy Operating Co. | Midland, TX 79706 | Oil & Gas Operator | Feb 2025 |
| 2351 | Cotiga Development Company, Limited Partnership | Williamson, WV 25661-0000 | Oil & Gas Operator | Dec 2021 |
| 2352 | Cotton County Ventures | Estes Park, CO 80517 | Oil Operator | Nov 2003 |
| 2353 | Cotton Petroleum | | Oil & Gas Operator | May 1988 |
| 2354 | Cotton Petroleum Corp/Apc | Denver, CO 80203-4549 | Oil & Gas Operator | Nov 1990 |
| 2355 | Cotton Petroleum Corporation | Tulsa, OK 74102 | Oil & Gas Operator | Jan 2005 |
| 2356 | Cotton Valley Operating Company | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2000 |
| 2357 | Cotton Valley Operations, Inc. | Longview, TX 75608 | Oil & Gas Operator | Apr 2025 |
| 2358 | Cotton Valley Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 2359 | Cotton Well Drilling Co Inc | Sheridan, NY 14135 | Oil & Gas Operator | Dec 2023 |
| 2360 | Cotton, W. L. | Hebbronville, TX 78361 | Oil & Gas Operator | Mar 1996 |
| 2361 | Cotton, W.L. Gems & Minerals LTD | Hebbronville, TX 78361 | Oil & Gas Operator | May 2000 |
| 2362 | Cottonmouth SWD LLC | Tulsa, OK 74103-3522 | Oil Operator | Oct 2024 |
| 2363 | Cottonwood Oil C | | Oil & Gas Operator | Oct 1988 |
| 2364 | Cottonwood Oil Inc | Worland, WY 82401 | Oil & Gas Operator | Jun 1988 |
| 2365 | Cottonwood Opr Corp | Dubois, PA 15801-0403 | Gas Operator | Dec 1989 |
| 2366 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 2367 | Cottonwood Prod Co Inc | Buffalo, NY 14202-2212 | Gas Operator | Dec 2002 |
| 2368 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 2369 | Couch Donald W | Marlow, OK 73055-5252 | Oil & Gas Operator | Feb 2025 |
| 2370 | Couch Fred J | Broken Arrow, OK 74012 | Oil Operator | Mar 2010 |
| 2371 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Apr 2025 |
| 2372 | Couch, Gilbert | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 2373 | Couch, Harry L. | Odessa, TX 79762 | Oil & Gas Operator | Nov 1994 |
| 2374 | Cougar Energies, Inc. | Oberlin, KS 67749 | Oil Operator | Jun 1996 |
| 2375 | Cougar Energy Inc | Oil City, PA 16301-4046 | Oil & Gas Operator | Dec 2013 |
| 2376 | Cougar Energy Investment LLC | Spring, TX 77387-7277 | Oil & Gas Operator | Sep 2014 |
| 2377 | Cougar Exploration, Inc. | | Oil & Gas Operator | Jun 1988 |
| 2378 | Cougar Oil & Gas Co., Inc. | Houston, TX 77269 | Oil & Gas Operator | Mar 2008 |
| 2379 | Cougar Oil, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Jun 2009 |
| 2380 | Coughlin Daniel | El Reno, OK 73036 | Oil Operator | Aug 2000 |
| 2381 | Coulthurst MGT & Inv Inc | Reno, NV 89504 | Oil Operator | Sep 2020 |
| 2382 | Council Oak Resources LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jan 2025 |
| 2383 | Country Boy Oil Co Inc | | Oil Operator | Nov 2017 |
| 2384 | Country Side Sand & Gravel, Inc | Collins, NY 14034 | Gas Operator | Dec 2023 |
| 2385 | Countrymark Energy Resources, LLC | MT Vernon, IN 47620 | Oil & Gas Operator | Dec 2023 |
| 2386 | County Line Resources LLC | Lancaster, TX 75146 | Oil Operator | Apr 2025 |
| 2387 | County Line Stone Co., Inc. | Akron, NY 14001 | Gas Operator | Dec 2023 |
| 2388 | County Line Stripper Wells LLC | Chelsea, OK 74016 | Oil & Gas Operator | Dec 2024 |
| 2389 | County Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 1993 |
| 2390 | Countyline Production Co LLC | Duncan, OK 73533 | Oil Operator | Feb 2025 |
| 2391 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 2392 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 2393 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 2394 | Courtland City Lights Assoc. | | Oil Operator | Dec 2005 |
| 2395 | Courtney Oil Co. | | Oil Operator | Dec 1998 |
| 2396 | Courtwright Management, Inc. | Bridgeport, WV 26330 | Gas Operator | Dec 2021 |
| 2397 | Coushatta Oil & Gas Inc. | | Oil & Gas Operator | Jan 2007 |
| 2398 | Cousins Exploration Co | Wichita Falls, TX 76307 | Oil Operator | Jun 1991 |
| 2399 | Covalent Exploration Incorporated | Houston, TX 77079 | Oil Operator | Apr 2025 |
| 2400 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |