| 18101 | C. A. MILLER | Kiowa County, KS | Oil & Gas Property | Oct 2017 |
| 18102 | C. A. VOSHELL | Haskell County, KS | Gas Property | May 2026 |
| 18103 | C. BATES | Trumbull County, OH | Oil & Gas Property | Dec 2025 |
| 18104 | C. C. BETTS | Finney County, KS | Oil & Gas Property | May 2026 |
| 18105 | C. C. PARKER A 3 | San Patricio County, TX | Oil & Gas Property | Jul 2025 |
| 18106 | C. C. WHEATLEY 1 | Meade County, KS | Oil & Gas Property | Dec 2019 |
| 18107 | C. D. DAY | Seward County, KS | Gas Property | May 2026 |
| 18108 | C. E. BOYD | Nolan County, TX | Oil & Gas Property | Sep 2015 |
| 18109 | C. E. DOWNING | Stevens County, KS | Gas Property | Aug 2020 |
| 18110 | C. E. HOLT UNIT | Wise County, TX | Oil & Gas Property | Jun 2026 |
| 18111 | C. E. HOUCHIN ET AL | Kern County, CA | Oil Property | May 1998 |
| 18112 | C. E. MOORE UNIT | Panola County, TX | Oil & Gas Property | Jun 2026 |
| 18113 | C. E. WOOLDRIDGE | Meade County, KS | Oil & Gas Property | May 2026 |
| 18114 | C. F. PATTERSON | Grant County, KS | Gas Property | May 2026 |
| 18115 | C. H. MAGIE | Lane County, KS | Oil Property | Mar 2026 |
| 18116 | C. H. SUGG | Reagan County, TX | Oil & Gas Property | May 2026 |
| 18117 | C. I. BELL GAS UNIT NO. 1 | Panola County, TX | Oil & Gas Property | Feb 2025 |
| 18118 | C. J. DABOVAL -A | Wharton County, TX | Oil & Gas Property | Nov 2025 |
| 18119 | C. J. EDWARDS | Parker County, TX | Oil & Gas Property | Jun 2026 |
| 18120 | C. JOSH | Yuma County, CO | Gas Property | May 2026 |
| 18121 | C. L. DAVIDSON 1 | Meade County, KS | Oil & Gas Property | May 2026 |
| 18122 | C. L. DEW | Grant County, KS | Gas Property | May 2026 |
| 18123 | C. L. GRIGSBY ESTATE | Stevens County, KS | Gas Property | May 2026 |
| 18124 | C. L. HINSHAW GAS UNIT | Morton County, KS | Gas Property | May 2026 |
| 18125 | C. L. HUXMAN | Haskell County, KS | Gas Property | May 2026 |
| 18126 | C. L. LADNER | Grant County, KS | Gas Property | May 2026 |
| 18127 | C. L. YORK | Van Zandt County, TX | Oil & Gas Property | May 2026 |
| 18128 | C. LEE REEVE | Finney County, KS | Oil Property | Sep 2019 |
| 18129 | C. LEWIS | Jack County, TX | Oil & Gas Property | Jun 2026 |
| 18130 | C. LOVAAS | McKenzie County, ND | Oil & Gas Property | Oct 2017 |
| 18131 | C. M. LOOMER | McKenzie County, ND | Oil & Gas Property | Jul 2019 |
| 18132 | C. M. REIQUAM | Renville County, ND | Oil & Gas Property | Dec 2011 |
| 18133 | C. M. WELLS | Simpson County, MS | Oil & Gas Property | Jun 2026 |
| 18134 | C. MATTHEWS | Logan County, OK | Oil & Gas Property | Jun 2026 |
| 18135 | C. N. WILLIFORD | Freestone County, TX | Oil & Gas Property | Jun 2026 |
| 18136 | C. O. & G. CO | Harris County, TX | Oil & Gas Property | May 2026 |
| 18137 | C. P. KELLOGG UNIT 1 | Meade County, KS | Oil & Gas Property | May 2026 |
| 18138 | C. PEPPER UNIT | Bradford County, PA | Gas Property | Jun 2026 |
| 18139 | C. R. ALDRICH | Ness County, KS | Oil Property | May 2026 |
| 18140 | C. R. FISCHER 'D' | Kearny County, KS | Oil Property | May 2026 |
| 18141 | C. R. JONES G | Moore County, TX | Gas Property | Jun 2026 |
| 18142 | C. R. SHELBY UNIT | Hill County, TX | Oil & Gas Property | Jun 2026 |
| 18143 | C. RASMUSSEN 1-23-14H | Williams County, ND | Oil & Gas Property | Jun 2026 |
| 18144 | C. REDDIG | Valley County, MT | Oil & Gas Property | Aug 2013 |
| 18145 | C. S. CARPENTER | Stevens County, KS | Gas Property | May 2026 |
| 18146 | C. S. HIGH 1 | Seward County, KS | Gas Property | May 2026 |
| 18147 | C. S. NORTON | Finney County, KS | Gas Property | May 2026 |
| 18148 | C. S. UNDERWOOD | Greenwood County, KS | Oil Property | Sep 2022 |
| 18149 | C. SMITH | Montgomery County, KS | Oil & Gas Property | Jun 2020 |
| 18150 | C. SOLBERG | Sheridan County, MT | Oil & Gas Property | Feb 2026 |
| 18151 | C. TUCKER | Montgomery County, KS | Gas Property | May 2026 |
| 18152 | C. W. A 14 | Wise County, TX | Oil & Gas Property | Apr 2026 |
| 18153 | C. W. A 2 | Wise County, TX | Oil & Gas Property | Apr 2026 |
| 18154 | C. W. A 3 | Wise County, TX | Oil & Gas Property | Apr 2026 |
| 18155 | C. W. B 18 | Wise County, TX | Oil & Gas Property | May 2026 |
| 18156 | C. W. B 2 | Wise County, TX | Oil & Gas Property | Apr 2026 |
| 18157 | C. W. B 3 | Wise County, TX | Oil & Gas Property | Apr 2026 |
| 18158 | C. W. LOGSDON -A | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 18159 | C. WELLS | Ashland County, OH | Oil & Gas Property | Dec 2025 |
| 18160 | C. WINGER | Stanton County, KS | Gas Property | May 2026 |
| 18161 | C. WINNEY | Payne County, OK | Oil & Gas Property | Jun 2026 |
| 18162 | C.A. 2820 | Woods County, OK | Oil & Gas Property | Jun 2026 |
| 18163 | C.A. DYER-PUMA | Newton County, TX | Oil & Gas Property | Jun 2026 |
| 18164 | C.A. NEWSOM ESTATE | Freestone County, TX | Oil & Gas Property | Jun 2026 |
| 18165 | C.A. WEST ESTATE | Westmoreland County, PA | Gas Property | Dec 2025 |
| 18166 | C.B. MORGAN | Choctaw County, AL | Oil Property | Aug 1978 |
| 18167 | C.B. STODDARD | Colusa County, CA | Gas Property | Feb 2012 |
| 18168 | C.C. CARTER | Hughes County, OK | Gas Property | Jun 2026 |
| 18169 | C.C. CITIES SERVICE | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 18170 | C.C. CURTIS | Athens County, OH | Oil & Gas Property | Dec 2025 |
| 18171 | C.C. LOCKHART & BROWN | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 18172 | C.C. NIX-FUHRMAN | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 18173 | C.C. THOMPSON | Freestone County, TX | Oil & Gas Property | Jun 2026 |
| 18174 | C.C.CHERRY | Pottawatomie County, OK | Oil Property | Jun 2026 |
| 18175 | C.C.M.O | Kern County, CA | Oil & Gas Property | Aug 1984 |
| 18176 | C.C.M.O | Kings County, CA | Oil & Gas Property | Aug 2024 |
| 18177 | C.D.M. A COM | Eddy County, NM | Oil & Gas Property | Jul 2026 |
| 18178 | C.D.SMITH | Carter County, OK | Oil Property | Jun 2021 |
| 18179 | C.D.U. 'A' | Yoakum County, TX | Oil & Gas Property | Jun 2026 |
| 18180 | C.E. CALVERT | Stanton County, KS | Gas Property | May 2026 |
| 18181 | C.E. HEARD B | Bee County, TX | Oil & Gas Property | Jun 2026 |
| 18182 | C.E. SMITH | Washington County, PA | Oil Property | Dec 2025 |
| 18183 | C.E. STROH 4A MBH-ULW | Dunn County, ND | Oil & Gas Property | Jun 2026 |
| 18184 | C.G. HOOKS ET AL | Harris County, TX | Gas Property | Jun 2026 |
| 18185 | C.G. LUDEMAN 'B' | Loving County, TX | Oil & Gas Property | May 2026 |
| 18186 | C.H. BINNEY | Grant County, KS | Gas Property | May 2026 |
| 18187 | C.H. ESSE UNIT | Live Oak County, TX | Oil & Gas Property | Jun 2026 |
| 18188 | C.H. KNIGHT | Reeves County, TX | Oil & Gas Property | Jun 2026 |
| 18189 | C.H. RAMIREZ MINERALS LTD | Webb County, TX | Oil & Gas Property | Apr 2026 |
| 18190 | C.J. IVERSON | Liberty County, MT | Oil & Gas Property | Apr 2026 |
| 18191 | C.J.RICKER ESTATE | Haskell County, KS | Gas Property | May 2026 |
| 18192 | C.M. ABNEY A HV UNIT | Harrison County, TX | Oil & Gas Property | Jun 2026 |
| 18193 | C.M. HALL A 2 | Starr County, TX | Oil & Gas Property | Apr 2026 |
| 18194 | C.M. RACKEL | Milam County, TX | Oil & Gas Property | Apr 2026 |
| 18195 | C.N. KING | Grant County, KS | Gas Property | May 2026 |
| 18196 | C.NOBLE | Payne County, OK | Oil Property | Dec 2024 |
| 18197 | C.O. 34-20H | Dunn County, ND | Oil & Gas Property | Jun 2026 |
| 18198 | C.O. MCELROY | Ashtabula County, OH | Oil & Gas Property | Dec 1990 |
| 18199 | C.O. OSWELL | Baldwin County, AL | Oil Property | Oct 2023 |
| 18200 | C.O.BURK | Pontotoc County, OK | Oil Property | Jun 2026 |