| 2301 | Cotton, W.L. Gems & Minerals LTD | Hebbronville, TX 78361 | Oil & Gas Operator | May 2000 |
| 2302 | Cottonmouth SWD LLC | Tulsa, OK 74103-3522 | Oil Operator | Apr 2026 |
| 2303 | Cottonwood Oil C | | Oil & Gas Operator | Oct 1988 |
| 2304 | Cottonwood Oil Inc | Worland, WY 82401 | Oil & Gas Operator | Jun 1988 |
| 2305 | Cottonwood Opr Corp | | Gas Operator | Dec 1989 |
| 2306 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 2307 | Cottonwood Prod Co Inc | Buffalo, NY 14202-2212 | Gas Operator | Dec 2002 |
| 2308 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 2309 | Cotula Oil & Gas Co., Inc. | Cross Plains, TX 76443 | Oil Operator | Jul 2026 |
| 2310 | Couch Donald W | Marlow, OK 73055 | Oil & Gas Operator | Apr 2026 |
| 2311 | Couch Fred J | Broken Arrow, OK 74012 | Oil Operator | Mar 2010 |
| 2312 | Couch Oil & Gas, Inc. | Dallas, TX 75229 | Oil & Gas Operator | Jul 2026 |
| 2313 | Couch, Gilbert | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2026 |
| 2314 | Couch, Harry L. | Odessa, TX 79762 | Oil & Gas Operator | Nov 1994 |
| 2315 | Cougar Energies, Inc. | Oberlin, KS 67749 | Oil Operator | Jun 1996 |
| 2316 | Cougar Energy Inc | Oil City, PA 16301-4046 | Oil & Gas Operator | Dec 2013 |
| 2317 | Cougar Energy Investment LLC | Spring, TX 77387-7277 | Oil & Gas Operator | Sep 2014 |
| 2318 | Cougar Exploration, Inc. | | Oil & Gas Operator | Jun 1988 |
| 2319 | Cougar Oil | | Oil Operator | Jan 2026 |
| 2320 | Cougar Oil & Gas Co., Inc. | Houston, TX 77269 | Oil & Gas Operator | Mar 2008 |
| 2321 | Cougar Oil, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Jun 2009 |
| 2322 | Coughlin, Daniel L | | Oil Operator | Aug 2000 |
| 2323 | Coulthurst MGT & Inv Inc | Reno, NV 89504 | Oil Operator | Sep 2020 |
| 2324 | Council Oak Resources LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Dec 2025 |
| 2325 | Country Boy Oil Co Inc | | Oil Operator | Nov 2017 |
| 2326 | Country Side Sand & Gravel, Inc | Collins, NY 14034 | Gas Operator | Dec 2025 |
| 2327 | Countrymark Energy Resources L L C | MT Vernon, IN 47620 | Oil & Gas Operator | Dec 2024 |
| 2328 | County Line Stone Co., Inc. | Akron, NY 14001 | Gas Operator | Dec 2025 |
| 2329 | County Line Stripper Wells LLC | Chelsea, OK 74016 | Oil & Gas Operator | Apr 2026 |
| 2330 | County Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Apr 1993 |
| 2331 | Countyline Production Co LLC | Duncan, OK 73533 | Oil Operator | Apr 2026 |
| 2332 | Couroil, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2000 |
| 2333 | Courson Oil & Gas, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2026 |
| 2334 | Courson, Harold D. | Perryton, TX 79070 | Oil & Gas Operator | Aug 1998 |
| 2335 | Courtland City Lights Assoc. | | Oil Operator | Dec 2005 |
| 2336 | Courtney Oil Co. | | Oil Operator | Dec 1998 |
| 2337 | Coushatta Oil & Gas Inc. | | Oil & Gas Operator | Jan 2007 |
| 2338 | Cousins Exploration Co | Wichita Falls, TX 76307 | Oil Operator | Jun 1991 |
| 2339 | Covalence Operating Company LLC | | Oil & Gas Operator | May 2026 |
| 2340 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 2341 | Covenant Oil & Gas, L.P. | Houston, TX 77057 | Oil & Gas Operator | Dec 2006 |
| 2342 | Covenant Oil Company | Houma, LA 70360 | Oil & Gas Operator | Dec 2015 |
| 2343 | Covenant Oil Corp | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 2344 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | Jul 2026 |
| 2345 | Covenant Production Co., L.C. | Midland, TX 79702 | Oil & Gas Operator | Nov 2002 |
| 2346 | Covert, Christopher P. | Auburn, NY 13021 | Gas Operator | Dec 2025 |
| 2347 | Covey Energy, Inc. | | Oil & Gas Operator | Jun 1998 |
| 2348 | Covey Park Gas LLC | | Oil & Gas Operator | Aug 2019 |
| 2349 | Covey Park Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Aug 2019 |
| 2350 | Covey Park Resources LLC | Frisco, TX 75034 | Oil & Gas Operator | Aug 2019 |
| 2351 | Covington Oil Company Inc | Nichols Hills, OK 73116 | Oil & Gas Operator | Apr 2026 |
| 2352 | Cow Creek Resources Inc | Ponca City, OK 74601-7815 | Oil & Gas Operator | Apr 2026 |
| 2353 | Cow Run LTD Liability Company | Davidson, NC 28036 | Oil & Gas Operator | Nov 2018 |
| 2354 | Cowan Oil Company | | Oil Operator | Sep 1990 |
| 2355 | Cowboy Clean Fuels LLC | Laramie, WY 82072 | Gas Operator | Apr 2026 |
| 2356 | Cowboy Oil & Gas | Bristow, OK 74010-0057 | Oil & Gas Operator | Jul 2018 |
| 2357 | Cowboy Operating LLC | Oklahoma City, OK 73120 | Oil Operator | Mar 2026 |
| 2358 | Cowboys Resources Corp. | New Braunfels, TX 78132 | Oil Operator | Jan 2008 |
| 2359 | Cowden SR Lester L | Oklahoma City, OK 73118-4011 | Oil & Gas Operator | Sep 1999 |
| 2360 | Cowen Michael T | | Oil & Gas Operator | Dec 2009 |
| 2361 | Cowles James C | Muskogee, OK 74401-5262 | Oil Operator | Mar 2026 |
| 2362 | Cowley Energy Associates, LLC | Plano, TX 75093 | Gas Operator | Dec 2009 |
| 2363 | Cowrie Energy LLC | Austin, TX 78703 | Oil & Gas Operator | Jul 2026 |
| 2364 | Cowry Enterprises, LTD. | Littleton, CO 80161-3310 | Oil & Gas Operator | Mar 2022 |
| 2365 | Cox & Perkins Exploration, Inc. | Houston, TX 77057 | Oil & Gas Operator | Jul 2026 |
| 2366 | Cox Edwin L & Be | | Oil & Gas Operator | Nov 1989 |
| 2367 | Cox Edwin L & Berry R | | Oil & Gas Operator | Oct 1987 |
| 2368 | Cox Edwin L & R Berry | Dallas, TX 75202 | Oil & Gas Operator | Apr 2015 |
| 2369 | Cox Elmer N | Irving, TX 75181 | Oil Operator | Aug 2013 |
| 2370 | Cox Engineering, LLC | Abilene, TX 79605 | Oil Operator | Mar 2006 |
| 2371 | Cox Exploration, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Nov 1999 |
| 2372 | Cox Gas Corporation | Dallas, TX 75201-7306 | Oil & Gas Operator | Apr 2015 |
| 2373 | Cox Kendall Jay | Recluse, WY 28775 | Oil & Gas Operator | Aug 2016 |
| 2374 | Cox Linda | Bristow, OK 74010-0808 | Oil & Gas Operator | Jan 2018 |
| 2375 | Cox Oil & Gas Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2014 |
| 2376 | Cox Operating Co. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jun 2000 |
| 2377 | Cox Operating, L.L.C. | | Oil & Gas Operator | Jan 2024 |
| 2378 | Cox P D Inc | Bristow, OK 74010 | Oil & Gas Operator | May 1993 |
| 2379 | Cox Resources Corporation | Dallas, TX 75244 | Oil & Gas Operator | Mar 2015 |
| 2380 | Cox Robert L | Blackwell, OK 74631 | Oil & Gas Operator | Apr 2026 |
| 2381 | Cox, Gary L | | Oil Operator | Mar 2022 |
| 2382 | Cox, H. L. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jan 2011 |
| 2383 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 2384 | Cox, Lee Investments Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | Jul 2026 |
| 2385 | Cox, Martin Regan | Irving, TX 75014 | Oil & Gas Operator | Jul 2026 |
| 2386 | Cox, Robert G. & Associates,Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 1994 |
| 2387 | Cox, Wayne D. | Eureka, KS 67045 | Oil Operator | Sep 1991 |
| 2388 | Coy W. Hale | | Oil Operator | Nov 2024 |
| 2389 | Coyote Oil Company | Lufkin, TX 75915 | Oil & Gas Operator | Sep 1996 |
| 2390 | Coyote Oil Company. LTD. | | Oil & Gas Operator | Dec 1997 |
| 2391 | Coyote Oil LLC | | Oil Operator | Jan 2018 |
| 2392 | Coyote Oil, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Jul 2026 |
| 2393 | Coyote Operating, LLC | Graham, TX 76450 | Oil Operator | Jul 2026 |
| 2394 | Coyote Services, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Mar 2002 |
| 2395 | Cozart Producers | | Oil Operator | Dec 2025 |
| 2396 | CP Energy, LLC | Edmond, OK 73034 | Oil Operator | Jul 2025 |
| 2397 | CP Exploration III Operating,LLC | Lafayette, LA 70505 | Oil & Gas Operator | Sep 2023 |
| 2398 | CP Exploration TX Operating LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2017 |
| 2399 | CPBG, LLC | | Oil Operator | Oct 2019 |
| 2400 | Cpi 5, L.L.C | | Oil Operator | Dec 2023 |