| 28101 | CTF 32-13-4 | Carroll County, OH | Oil & Gas Property | Dec 2025 |
| 28102 | CTL OBRIEN ET AL | Dawson County, TX | Oil & Gas Property | Feb 2026 |
| 28103 | CTLC 2 | Lee County, FL | Oil & Gas Property | May 2018 |
| 28104 | CTU-FEE | Weston County, WY | Oil & Gas Property | Aug 1997 |
| 28105 | CU DOWNS FED | Converse County, WY | Oil & Gas Property | Feb 2026 |
| 28106 | CU DOWNS FED 28 | Converse County, WY | Oil & Gas Property | Feb 2026 |
| 28107 | CU DOWNS FED 3 | Converse County, WY | Oil & Gas Property | Feb 2026 |
| 28108 | CU REPP FED 09-213769-1XTPH | Converse County, WY | Oil & Gas Property | Feb 2026 |
| 28109 | CUADRILLA | Grady County, OK | Oil & Gas Property | Feb 2026 |
| 28110 | CUADRITO AZO FEDERAL | Eddy County, NM | Oil & Gas Property | Feb 2026 |
| 28111 | CUATRO 21 | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 28112 | CUATRO HIJOS FEE | Lea County, NM | Oil & Gas Property | Feb 2026 |
| 28113 | CUB 56-2-33 1H | Reeves County, TX | Oil & Gas Property | Feb 2026 |
| 28114 | CUB CREEK COAL CO. A | Wyoming County, WV | Gas Property | Dec 2021 |
| 28115 | CUB FE | Johnson County, WY | Oil & Gas Property | Feb 2026 |
| 28116 | CUBBISON | Guernsey County, OH | Oil Property | Dec 2024 |
| 28117 | CUBBON | Venango County, PA | Oil Property | Dec 1997 |
| 28118 | CUBBON | Venango County, PA | Gas Property | Dec 2025 |
| 28119 | CUBBON | Venango County, PA | Oil & Gas Property | Dec 2025 |
| 28120 | CUBBON LUMBER CO | Warren County, PA | Gas Property | Dec 2025 |
| 28121 | CUBINE | Gray County, TX | Gas Property | Feb 2026 |
| 28122 | CUBINE | Clay County, TX | Oil & Gas Property | Feb 2026 |
| 28123 | CUCCIA COM | San Juan County, NM | Oil & Gas Property | Feb 2026 |
| 28124 | CUCCIA STATE COM | San Juan County, NM | Gas Property | Feb 2026 |
| 28125 | CUCCIA-U.S.L | Kern County, CA | Oil & Gas Property | Jul 2025 |
| 28126 | CUCH 10-17-2-1E | Uintah County, UT | Oil & Gas Property | Mar 2026 |
| 28127 | CUDA 1 | Williams County, ND | Oil & Gas Property | Mar 2026 |
| 28128 | CUDAHY | Kent County, MI | Oil Property | Feb 2026 |
| 28129 | CUDD | Ochiltree County, TX | Oil & Gas Property | Feb 2026 |
| 28130 | CUDE | Chautauqua County, KS | Oil & Gas Property | Jul 2014 |
| 28131 | CUDE A | Wise County, TX | Oil & Gas Property | Feb 2026 |
| 28132 | CUDE W.T | Caldwell County, TX | Oil & Gas Property | Jan 2026 |
| 28133 | CUDJO | Seminole County, OK | Oil Property | Mar 2025 |
| 28134 | CUDJO | Seminole County, OK | Oil Property | Jan 2026 |
| 28135 | CUDJO-PALMER 1 | Seminole County, OK | Oil Property | Jan 2026 |
| 28136 | CUDNEY | Edwards County, KS | Oil & Gas Property | Jan 2026 |
| 28137 | CUELLAR | Zapata County, TX | Oil & Gas Property | Feb 2026 |
| 28138 | CUELLAR | Zapata County, TX | Oil & Gas Property | Feb 2026 |
| 28139 | CUELLAR | Zapata County, TX | Oil & Gas Property | Feb 2026 |
| 28140 | CUELLAR | Atascosa County, TX | Oil & Gas Property | Feb 2026 |
| 28141 | CUELLAR | Zapata County, TX | Oil & Gas Property | Jan 2026 |
| 28142 | CUELLAR FERNA | Zapata County, TX | Oil & Gas Property | Feb 2026 |
| 28143 | CUELLAR MA | Zapata County, TX | Oil & Gas Property | Feb 2026 |
| 28144 | CUELLAR-GRAVES GAS UNIT | Zapata County, TX | Oil & Gas Property | Feb 2026 |
| 28145 | CUERNO | Lea County, NM | Oil & Gas Property | Feb 2026 |
| 28146 | CUERVO FEDERAL | Lea County, NM | Oil & Gas Property | Feb 2026 |
| 28147 | CUFFMAN | Denton County, TX | Oil & Gas Property | Feb 2026 |
| 28148 | CUGNINI A | La Plata County, CO | Gas Property | Feb 2026 |
| 28149 | CUL-RAY | Wise County, TX | Oil & Gas Property | Feb 2026 |
| 28150 | CULBERSON | Brown County, TX | Oil & Gas Property | Jan 2026 |
| 28151 | CULBERSON | Culberson County, TX | Oil & Gas Property | Feb 2026 |
| 28152 | CULBERSON-HUGHES UNIT | Karnes County, TX | Oil & Gas Property | Feb 2026 |
| 28153 | CULBERSON-PATTESON UNIT | Karnes County, TX | Oil & Gas Property | Feb 2026 |
| 28154 | CULBERT | Ventura County, CA | Oil & Gas Property | Mar 2026 |
| 28155 | CULBERTSON | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 28156 | CULBERTSON | Carson County, TX | Gas Property | Feb 2026 |
| 28157 | CULBERTSON | Hitchcock County, NE | Oil Property | Dec 2024 |
| 28158 | CULBERTSON | Terrell County, TX | Oil & Gas Property | Feb 2026 |
| 28159 | CULBERTSON | Bienville Parish, LA | Oil & Gas Property | Dec 2024 |
| 28160 | CULBERTSON | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 28161 | CULBERTSON | Armstrong County, PA | Gas Property | Dec 2025 |
| 28162 | CULBERTSON | Jones County, TX | Oil & Gas Property | Sep 2023 |
| 28163 | CULBREATH | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 28164 | CULBREATH, BOB | Warren County, KY | Oil & Gas Property | Dec 2023 |
| 28165 | CULEBRA BLV FEDERAL COM | Eddy County, NM | Oil & Gas Property | Feb 2026 |
| 28166 | CULHANE | La Plata County, CO | Gas Property | Feb 2026 |
| 28167 | CULLAR UNIT | Grayson County, TX | Oil & Gas Property | Feb 2026 |
| 28168 | CULLEN | Holmes County, OH | Oil & Gas Property | Dec 2025 |
| 28169 | CULLEN | Andrews County, TX | Oil & Gas Property | Feb 2026 |
| 28170 | CULLEN | Harrison County, TX | Oil & Gas Property | Feb 2026 |
| 28171 | CULLEN | Alfalfa County, OK | Oil & Gas Property | Feb 2026 |
| 28172 | CULLEN | Okmulgee County, OK | Gas Property | Nov 2014 |
| 28173 | CULLEN | Colorado County, TX | Oil & Gas Property | Feb 2026 |
| 28174 | CULLEN | Washington County, OH | Oil & Gas Property | Dec 2025 |
| 28175 | CULLEN UNIT A | Live Oak County, TX | Oil & Gas Property | Feb 2026 |
| 28176 | CULLEN-H | Colorado County, TX | Oil & Gas Property | Feb 2026 |
| 28177 | CULLER | Gray County, TX | Oil & Gas Property | Feb 2026 |
| 28178 | CULLER I | Ashland County, OH | Oil Property | Dec 2025 |
| 28179 | CULLERS | Young County, TX | Oil & Gas Property | Feb 2005 |
| 28180 | CULLERS J. EDGAR GAS UNIT | Rusk County, TX | Oil & Gas Property | Feb 2026 |
| 28181 | CULLEY | Seminole County, OK | Oil Property | Nov 2019 |
| 28182 | CULLEY | Graham County, KS | Oil Property | Oct 2025 |
| 28183 | CULLI | Bee County, TX | Oil & Gas Property | Mar 2019 |
| 28184 | CULLINAN FEE | Caddo Parish, LA | Oil & Gas Property | Jan 2025 |
| 28185 | CULLINS FEDERAL | Rio Arriba County, NM | Oil & Gas Property | Feb 2026 |
| 28186 | CULLISON | Johnson County, TX | Gas Property | Dec 2023 |
| 28187 | CULLISON | Stevens County, KS | Oil & Gas Property | Jan 2026 |
| 28188 | CULLISON | Licking County, OH | Oil & Gas Property | Dec 2024 |
| 28189 | CULLISON | Licking County, OH | Oil & Gas Property | Dec 2010 |
| 28190 | CULLISON | Coshocton County, OH | Oil & Gas Property | Dec 2024 |
| 28191 | CULLISON 2 | Stevens County, KS | Oil Property | Jul 2025 |
| 28192 | CULLUM | Wichita County, TX | Oil Property | Feb 2026 |
| 28193 | CULLUM | Gray County, TX | Oil & Gas Property | Feb 2026 |
| 28194 | CULLUM | Wheeler County, TX | Oil & Gas Property | Feb 2026 |
| 28195 | CULLUM | Freestone County, TX | Oil & Gas Property | Feb 2026 |
| 28196 | CULLY | Seminole County, OK | Oil & Gas Property | Feb 2026 |
| 28197 | CULLY | Ellis County, OK | Oil & Gas Property | Jan 2026 |
| 28198 | CULLY | Sumner County, KS | Oil Property | Dec 2025 |
| 28199 | CULP | Noble County, OK | Oil & Gas Property | Oct 2016 |
| 28200 | CULP | Caddo County, OK | Oil & Gas Property | Jan 2026 |