| 2101 | Charter Petroleum Company | Abilene, TX 79605 | Oil & Gas Operator | Apr 2026 |
| 2102 | Chartex Petroleum Company | Houston, TX 77070 | Oil & Gas Operator | Aug 2000 |
| 2103 | Chase Avenue Corporation, The | Dallas, TX 75219 | Oil & Gas Operator | Jun 2003 |
| 2104 | Chase Energy, Inc. | Austin, TX 78763 | Oil & Gas Operator | Oct 2001 |
| 2105 | Chase Operating Company | Abilene, TX 79608 | Oil & Gas Operator | Feb 2016 |
| 2106 | Chase Production Company | Pampa, TX 79066 | Oil & Gas Operator | Apr 2026 |
| 2107 | Chasla Energy, LLC | Iowa Park, TX 76367 | Oil Operator | Apr 2026 |
| 2108 | Chass Production Co. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Nov 2020 |
| 2109 | Chateau Oil And Gas, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2017 |
| 2110 | CHB Interests, LLC | Kilgore, TX 75663 | Oil Operator | Oct 2011 |
| 2111 | CHB Investments | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2004 |
| 2112 | Cheatham Well Service, Inc. | Luling, TX 78648 | Oil Operator | Apr 2026 |
| 2113 | Cheatham, Joe R. Oil Co. | Lockhart, TX 78644 | Oil & Gas Operator | Dec 2018 |
| 2114 | Cheatham, W. C. | Olney, TX 76374 | Oil & Gas Operator | Feb 2002 |
| 2115 | Cheetah Investments, Inc. | Winters, TX 79567 | Oil & Gas Operator | Apr 2026 |
| 2116 | Chek Oil Co. | Midland, TX 79708 | Oil & Gas Operator | May 2019 |
| 2117 | Chek Oil Co., LLC | Midland, TX 79704 | Oil Operator | Apr 2026 |
| 2118 | Chemily Management Company | Cypress, TX 77429 | Oil & Gas Operator | Apr 2023 |
| 2119 | Chenango Oil And Gas Co. | Groves, TX 77619 | Oil & Gas Operator | Apr 2026 |
| 2120 | Chenoweth, Grover | Marble Falls, TX 78654 | Oil & Gas Operator | Dec 2024 |
| 2121 | Cherco Properties, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Nov 1999 |
| 2122 | Cherokee DRLG. & Dev. Corp. | Winnetka, IL 60093 | Oil & Gas Operator | Jan 2003 |
| 2123 | Cherokee Production Corp. | Greenville, TX 75401 | Oil & Gas Operator | Apr 2026 |
| 2124 | Cherry Oil & Gas | Luling, TX 78648 | Oil & Gas Operator | Dec 2000 |
| 2125 | Cherry, William H., Inc. | Oklahoma City, OK 73125 | Oil & Gas Operator | Mar 2015 |
| 2126 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2026 |
| 2127 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 2128 | Chesapeake Permian LP | Oklahoma City, OK 73118-1044 | Oil & Gas Operator | Feb 2015 |
| 2129 | Chesher Oil Company | Holliday, TX 76366 | Oil Operator | Apr 2026 |
| 2130 | Chesher, Robert | Holliday, TX 76366 | Oil & Gas Operator | Dec 1995 |
| 2131 | Chesnut Oil And Gas, Inc. | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Apr 2026 |
| 2132 | Chesnutt Oil & Gas, Inc. | Mineral, TX 78125 | Oil & Gas Operator | Apr 2026 |
| 2133 | Chessher, Otto Drilling Company | Kearney, MO 64060 | Oil & Gas Operator | Dec 2013 |
| 2134 | Chestnut Explor. And Prod., Inc. | Dallas, TX 75208 | Oil & Gas Operator | Apr 2026 |
| 2135 | Chestnut Mountain Energy, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2026 |
| 2136 | Chestnut Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 2137 | Chestnut Petroleum, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Nov 2011 |
| 2138 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 2139 | Chevron Pipe Line Company | Houston, TX 77001 | Oil Operator | Feb 2015 |
| 2140 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 2141 | Cheyenne Minerals, Inc. | Houston, TX 77030 | Oil & Gas Operator | Jun 2001 |
| 2142 | Cheyenne Petroleum Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2026 |
| 2143 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 2144 | Chicken Coop, Inc., The | Hondo, TX 78861 | Oil & Gas Operator | Jan 2015 |
| 2145 | Chico Production Corp. | Bowie, TX 76230 | Oil & Gas Operator | Apr 2026 |
| 2146 | Chief Oil & Gas LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2022 |
| 2147 | Chief Operating Company | Houston, TX 77070 | Oil & Gas Operator | Feb 2004 |
| 2148 | Chief Operating LLC | Dallas, TX 75225 | Gas Operator | Mar 2009 |
| 2149 | Chief Petroleum Company | Dallas, TX 75244 | Oil & Gas Operator | Jul 1997 |
| 2150 | Childers, J. C. | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |
| 2151 | Chiltipin Production Company | Corpus Chrsti, TX 78466 | Oil & Gas Operator | Apr 2026 |
| 2152 | Chilton Energy | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Sep 2006 |
| 2153 | China Star Oil Co., LLC | Woodway, TX 76712 | Oil & Gas Operator | Jun 2010 |
| 2154 | Chinn Exploration Company | Longview, TX 75605 | Oil & Gas Operator | Nov 2015 |
| 2155 | Chiodo Corp. | San Antonio, TX 78232 | Oil & Gas Operator | Apr 2026 |
| 2156 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 2157 | Chisholm Oil & Gas, LC | Buda, TX 78610 | Oil & Gas Operator | Apr 2026 |
| 2158 | Chisholm Oil Investments | Seabrook, TX 77586 | Oil & Gas Operator | Apr 2026 |
| 2159 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2026 |
| 2160 | Chisos Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 2161 | Chisos, LTD | Houston, TX 77098 | Oil & Gas Operator | Apr 2026 |
| 2162 | Chisum Resources | Shallowater, TX 79363 | Oil Operator | Apr 2026 |
| 2163 | Chital Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2000 |
| 2164 | Chittim Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Apr 2026 |
| 2165 | Chmelar, Eugene Oil & Gas | Caldwell, TX 77836 | Oil & Gas Operator | Apr 2026 |
| 2166 | Choctaw II Oil & Gas, LTD. | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 2167 | Choctaw Resources, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Dec 2019 |
| 2168 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Apr 2026 |
| 2169 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Apr 2026 |
| 2170 | CHP Oil & Gas Company, L.C. | El Campo, TX 77437 | Oil & Gas Operator | Apr 2026 |
| 2171 | Christensen & Matthews | Houston, TX 77040 | Oil & Gas Operator | Apr 2026 |
| 2172 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 2173 | Christian Energy, Inc. | Mandeville, LA 70470 | Oil & Gas Operator | Mar 2008 |
| 2174 | Christian Operating Company | Cypress, TX 77429 | Oil & Gas Operator | Dec 2014 |
| 2175 | Christico Petroleum Company | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2026 |
| 2176 | Christie Oil Co., Inc | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 1996 |
| 2177 | Christie, C. B., Jr. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2014 |
| 2178 | Christopher Oil & Gas Inc | Fulshear, TX 77441 | Oil & Gas Operator | Apr 2015 |
| 2179 | Chroma Operating, Inc. | Washington, DC 20036 | Oil & Gas Operator | Jun 2016 |
| 2180 | Chumley, George Estate Of | Alice, TX 78333 | Oil & Gas Operator | Apr 2026 |
| 2181 | Church Ranch, LLC | Lubbock, TX 79423 | Oil Operator | Apr 2026 |
| 2182 | Chuza Operating | Midland, TX 79710 | Oil & Gas Operator | Sep 2006 |
| 2183 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Apr 2026 |
| 2184 | Cibolo Production, LLC | Boerne, TX 78006 | Oil Operator | Jan 2020 |
| 2185 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 2186 | Ciervo Resources Asset Holding, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 2187 | Cig Exploration Inc | Houston, TX 77046 | Oil & Gas Operator | Nov 1999 |
| 2188 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 2189 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 2190 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 2191 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Apr 2026 |
| 2192 | Cimarron Properties, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Nov 1997 |
| 2193 | Cinco Natural Resources Corp | La Grange, TX 78945 | Oil & Gas Operator | Apr 2026 |
| 2194 | Cinco Oil & Gas, LLC | Irving, TX 75039 | Oil & Gas Operator | Apr 2026 |
| 2195 | Cinnabar Energy, LTD. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2018 |
| 2196 | Cinnabar Operating, LLC | Fort Worth, TX 76121 | Oil & Gas Operator | Apr 2026 |
| 2197 | Cinron Energy, LLC | Arp, TX 75750 | Oil & Gas Operator | Apr 2026 |
| 2198 | Cippele Resources Co. | Longview, TX 75608 | Oil & Gas Operator | May 1994 |
| 2199 | Circle "M" Energy Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 2003 |
| 2200 | Circle B Oil & Gas | Bowie, TX 76230 | Oil & Gas Operator | Dec 2021 |