| 2201 | Christian Operating Company | Cypress, TX 77429 | Oil & Gas Operator | Dec 2014 |
| 2202 | Christico Petroleum Company | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2025 |
| 2203 | Christie Oil Co., Inc | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1996 |
| 2204 | Christie, C. B., Jr. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 2205 | Christopher Oil & Gas Inc | Fulshear, TX 77441 | Oil & Gas Operator | Apr 2015 |
| 2206 | Chroma Operating, Inc. | Washington, DC 20036 | Oil & Gas Operator | Jun 2016 |
| 2207 | Chumley, George Estate Of | Alice, TX 78333 | Oil & Gas Operator | Apr 2025 |
| 2208 | Church Ranch, LLC | Lubbock, TX 79423 | Oil Operator | Apr 2025 |
| 2209 | Churchill Operating, LLC | Houston, TX 77007 | Oil & Gas Operator | Apr 2025 |
| 2210 | Chuza Operating | Midland, TX 79710 | Oil & Gas Operator | Sep 2006 |
| 2211 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Apr 2025 |
| 2212 | Cibolo Production, LLC | Boerne, TX 78006 | Oil Operator | Jan 2020 |
| 2213 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 2214 | Ciervo Resources Asset Holding, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 2215 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 2216 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 2217 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2025 |
| 2218 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 2219 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Apr 2025 |
| 2220 | Cimarron Properties, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Nov 1997 |
| 2221 | Cinco Natural Resources Corp | La Grange, TX 78945 | Oil & Gas Operator | Apr 2025 |
| 2222 | Cinco Oil & Gas, LLC | Dallas, TX 75204 | Oil & Gas Operator | Apr 2025 |
| 2223 | Cinnabar Energy, LTD. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2018 |
| 2224 | Cinnabar Operating, LLC | Fort Worth, TX 76121 | Oil & Gas Operator | Apr 2025 |
| 2225 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | Apr 2025 |
| 2226 | Cippele Resources Co. | Longview, TX 75608 | Oil & Gas Operator | May 1994 |
| 2227 | Circle "M" Energy Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2003 |
| 2228 | Circle B Oil & Gas | Bowie, TX 76230 | Oil & Gas Operator | Dec 2021 |
| 2229 | Circle C Operations | Winnsboro, TX 75494 | Oil Operator | Apr 2025 |
| 2230 | Circle D Oil & Gas, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Apr 2025 |
| 2231 | Circle H Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2020 |
| 2232 | Circle Ridge Production, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 2233 | Circle W Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 2234 | Circle W Operating, Inc. | Mertzon, TX 76941 | Oil & Gas Operator | Apr 2025 |
| 2235 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Apr 2025 |
| 2236 | Cirrus Exploration Company | Prosper, TX 75078 | Oil & Gas Operator | Apr 2025 |
| 2237 | Cirrus Production Company | Enid, OK 73702 | Oil & Gas Operator | Jan 2025 |
| 2238 | Cisco Operating LLC | Plano, TX 75024 | Oil & Gas Operator | Feb 2025 |
| 2239 | Cisco Production Company, LLC | Victoria, TX 77902 | Oil & Gas Operator | May 2012 |
| 2240 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 2241 | Citori Oil Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2004 |
| 2242 | Citori Oil Company, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2014 |
| 2243 | Citrus Energy Corporation | Castle Rock, CO 80104 | Oil & Gas Operator | Mar 2020 |
| 2244 | City Of Brady | Brady, TX 76825 | Gas Operator | Feb 1998 |
| 2245 | City Of Dumas | Dumas, TX 79029 | Gas Operator | Apr 2025 |
| 2246 | City Of McLean | McLean, TX 79057 | Gas Operator | Apr 2025 |
| 2247 | City Of Sunray Utilities | Sunray, TX 79086 | Oil & Gas Operator | Apr 2025 |
| 2248 | City Of White Deer | White Deer, TX 79097 | Gas Operator | May 2017 |
| 2249 | Civitas Permian Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2025 |
| 2250 | Civron Petroleum Res., LLC | San Antonio, TX 78229 | Oil & Gas Operator | Apr 2025 |
| 2251 | CJ Tejas Energy, LLC | Pearland, TX 77581 | Oil Operator | Apr 2025 |
| 2252 | CJRW Oil & Gas | MC Camey, TX 79752 | Oil Operator | Apr 2025 |
| 2253 | CJW Operating Co. | Tucson, AZ 85718 | Oil Operator | Mar 2024 |
| 2254 | CK Operating Company, LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 2255 | CK5 Services LLC | Zephyr, TX 76890 | Oil & Gas Operator | Apr 2025 |
| 2256 | CKB Corporation | Borger, TX 79008 | Oil & Gas Operator | Aug 1997 |
| 2257 | CL&F Operating LLC | Spring, TX 77389 | Oil & Gas Operator | Dec 2022 |
| 2258 | Clamp Operating | San Antonio, TX 78264 | Oil & Gas Operator | Apr 2002 |
| 2259 | Clamp Operating Incorporated | San Antonio, TX 78264 | Oil & Gas Operator | Mar 2011 |
| 2260 | Clark Oil Co. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 2261 | Clark Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 2262 | Clark Operating Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 2263 | Clark, B. C. | Cross Plains, TX 76443 | Oil Operator | Dec 2007 |
| 2264 | Clark, G. A., Trustee | San Antonio, TX 78210 | Oil & Gas Operator | Nov 2017 |
| 2265 | Clark, John M. | Midland, TX 79701 | Oil & Gas Operator | Dec 1993 |
| 2266 | Clark, John M., Inc. | Midland, TX 79704 | Oil & Gas Operator | Apr 2025 |
| 2267 | Clark, Richard E., Inc. | Longview, TX 75604 | Oil & Gas Operator | May 2001 |
| 2268 | Claron Corporation | Houston, TX 77219 | Oil & Gas Operator | Apr 2025 |
| 2269 | Classic Energy Incorporated | Tyler, TX 75701 | Oil & Gas Operator | Jul 2005 |
| 2270 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 2271 | Classic Operating Co. LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 2272 | Classic Petroleum Partners, Inc. | Whitehouse, TX 75791 | Oil & Gas Operator | Apr 2025 |
| 2273 | Claude-Maggie Co. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 2274 | Clausen, A. G. | Cross Plains, TX 76443 | Oil & Gas Operator | Apr 2025 |
| 2275 | Clavo Oil, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 2276 | Clay Exploration, Inc. | Spring, TX 77387 | Oil & Gas Operator | Jun 2019 |
| 2277 | Clay Petroleum | Prosper, TX 75078 | Oil & Gas Operator | Feb 2023 |
| 2278 | Clay, Charles E. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2010 |
| 2279 | Clay, Jerry H. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2006 |
| 2280 | Clayton Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | May 2004 |
| 2281 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 2282 | CLC Operations Inc | Midland, TX 79701 | Oil & Gas Operator | Mar 1997 |
| 2283 | Cleantex Oilfield Services, LLC | Tyler, TX 75702 | Oil Operator | Apr 2025 |
| 2284 | Clear Brooke Ranches, LLC | Fort Worth, TX 76179 | Oil & Gas Operator | Apr 2025 |
| 2285 | Clear Fork Gas Company | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |
| 2286 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Apr 2025 |
| 2287 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 2288 | Clearfork Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2011 |
| 2289 | Clearfork Petroleum Inc. (A) | Lubbock, TX 79408 | Oil & Gas Operator | Apr 2025 |
| 2290 | Clearfork Production, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2018 |
| 2291 | Clearly Petroleum, LLC | Houston, TX 77086 | Oil & Gas Operator | Jun 2020 |
| 2292 | Cleary Petroleum Corporation | Edmond, OK 73083 | Oil & Gas Operator | Jul 2019 |
| 2293 | Clements Exploration Co | Oklahoma City, OK 73132-5922 | Oil & Gas Operator | Jan 2006 |
| 2294 | Clements Operating Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 2295 | Clemons, Tony W. | Minden, LA 71055 | Oil & Gas Operator | Dec 2016 |
| 2296 | Cleo Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | May 1997 |
| 2297 | Cleveland Oil & Gas | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 2298 | Cleveland Oil Company,L.L.C.,The | Midland, TX 79702 | Oil & Gas Operator | Sep 1999 |
| 2299 | Cleveland Production Company | Summit, MS 39666 | Oil & Gas Operator | Jul 1999 |
| 2300 | Click Corp | Monroe, LA 71207 | Oil & Gas Operator | Jan 2025 |