| 18001 | C. BLIKRE | Williams County, ND | Oil & Gas Property | Feb 2025 |
| 18002 | C. C. BETTS | Finney County, KS | Oil & Gas Property | Dec 2024 |
| 18003 | C. C. PARKER A 3 | San Patricio County, TX | Oil & Gas Property | Dec 2024 |
| 18004 | C. C. THOMPSON GAS UNIT | Freestone County, TX | Oil & Gas Property | Jan 2025 |
| 18005 | C. C. WHEATLEY 1 | Meade County, KS | Oil & Gas Property | Dec 2019 |
| 18006 | C. D. DAY | Seward County, KS | Gas Property | Dec 2024 |
| 18007 | C. E. DOWNING | Stevens County, KS | Gas Property | Aug 2020 |
| 18008 | C. E. HOLT UNIT | Wise County, TX | Oil & Gas Property | Jan 2025 |
| 18009 | C. E. HOUCHIN ET AL | Kern County, CA | Oil Property | May 1998 |
| 18010 | C. E. MOORE UNIT | Panola County, TX | Oil & Gas Property | Dec 2024 |
| 18011 | C. E. WOOLDRIDGE | Meade County, KS | Oil & Gas Property | Dec 2024 |
| 18012 | C. F. PATTERSON | Grant County, KS | Gas Property | Dec 2024 |
| 18013 | C. H. LEWIS 30-19H | Amite County, MS | Oil & Gas Property | Jan 2025 |
| 18014 | C. H. MAGIE | Lane County, KS | Oil Property | Jan 2024 |
| 18015 | C. H. SUGG | Reagan County, TX | Oil & Gas Property | Jan 2025 |
| 18016 | C. H. WYLIE GU 1H | Wise County, TX | Oil & Gas Property | Jan 2025 |
| 18017 | C. I. BELL GAS UNIT NO. 1 | Panola County, TX | Oil & Gas Property | Jan 2025 |
| 18018 | C. J. DABOVAL -A | Wharton County, TX | Oil & Gas Property | Jan 2025 |
| 18019 | C. J. EDWARDS | Parker County, TX | Oil & Gas Property | Jan 2025 |
| 18020 | C. JOSH | Yuma County, CO | Gas Property | Feb 2025 |
| 18021 | C. L. DAVIDSON 1 | Meade County, KS | Oil & Gas Property | Dec 2024 |
| 18022 | C. L. DEW | Grant County, KS | Gas Property | Dec 2024 |
| 18023 | C. L. GRIGSBY ESTATE | Stevens County, KS | Gas Property | Dec 2024 |
| 18024 | C. L. HINSHAW GAS UNIT | Morton County, KS | Gas Property | Apr 2024 |
| 18025 | C. L. HUXMAN | Haskell County, KS | Gas Property | Dec 2024 |
| 18026 | C. L. LADNER | Grant County, KS | Gas Property | Dec 2024 |
| 18027 | C. L. YORK | Van Zandt County, TX | Oil & Gas Property | Dec 2024 |
| 18028 | C. LEE REEVE | Finney County, KS | Oil Property | Sep 2019 |
| 18029 | C. LEWIS | Jack County, TX | Oil & Gas Property | Jan 2025 |
| 18030 | C. LOVAAS | McKenzie County, ND | Oil & Gas Property | Oct 2017 |
| 18031 | C. M. LOOMER | McKenzie County, ND | Oil & Gas Property | Jul 2019 |
| 18032 | C. M. REIQUAM | Renville County, ND | Oil & Gas Property | Jan 2012 |
| 18033 | C. M. WELLS | Simpson County, MS | Oil & Gas Property | Nov 2024 |
| 18034 | C. MATTHEWS | Logan County, OK | Oil & Gas Property | Jan 2025 |
| 18035 | C. N. WILLIFORD | Freestone County, TX | Oil & Gas Property | Jan 2025 |
| 18036 | C. O. & G. CO | Harris County, TX | Oil & Gas Property | Nov 2024 |
| 18037 | C. P. KELLOGG UNIT 1 | Meade County, KS | Oil & Gas Property | Dec 2024 |
| 18038 | C. PEPPER UNIT | Bradford County, PA | Gas Property | Feb 2025 |
| 18039 | C. R. ALDRICH | Ness County, KS | Oil Property | Dec 2024 |
| 18040 | C. R. FISCHER 'D' | Kearny County, KS | Oil Property | Dec 2024 |
| 18041 | C. R. JONES G | Moore County, TX | Gas Property | Jan 2025 |
| 18042 | C. R. SHELBY UNIT | Hill County, TX | Oil & Gas Property | Jan 2025 |
| 18043 | C. REDDIG | Valley County, MT | Oil & Gas Property | Aug 2013 |
| 18044 | C. S. CARPENTER | Stevens County, KS | Gas Property | Dec 2024 |
| 18045 | C. S. HIGH 1 | Seward County, KS | Gas Property | Dec 2024 |
| 18046 | C. S. NORTON | Finney County, KS | Gas Property | Dec 2024 |
| 18047 | C. S. UNDERWOOD | Greenwood County, KS | Oil Property | Sep 2022 |
| 18048 | C. SMITH | Montgomery County, KS | Oil & Gas Property | Jun 2020 |
| 18049 | C. SOLBERG | Sheridan County, MT | Oil & Gas Property | Dec 2024 |
| 18050 | C. TUCKER | Montgomery County, KS | Gas Property | Dec 2024 |
| 18051 | C. W. A 1 | Wise County, TX | Oil & Gas Property | Dec 2024 |
| 18052 | C. W. A 2 | Wise County, TX | Oil & Gas Property | Jan 2025 |
| 18053 | C. W. A 3 | Wise County, TX | Oil & Gas Property | Jan 2025 |
| 18054 | C. W. B 2 | Wise County, TX | Oil & Gas Property | Jan 2025 |
| 18055 | C. W. B 3 | Wise County, TX | Oil & Gas Property | Jan 2025 |
| 18056 | C. W. DAY | Chautauqua County, KS | Oil Property | Nov 2024 |
| 18057 | C. W. LOGSDON -A | Andrews County, TX | Oil & Gas Property | Jan 2025 |
| 18058 | C. WINGER | Stanton County, KS | Gas Property | Dec 2024 |
| 18059 | C. WINNEY | Payne County, OK | Oil & Gas Property | Jan 2025 |
| 18060 | C.A. 2820 | Woods County, OK | Oil & Gas Property | Feb 2025 |
| 18061 | C.A. DYER-PUMA | Newton County, TX | Oil & Gas Property | Jan 2025 |
| 18062 | C.A. WEST ESTATE | Westmoreland County, PA | Gas Property | Dec 2024 |
| 18063 | C.B. MORGAN | Choctaw County, AL | Oil Property | Aug 1978 |
| 18064 | C.B. STODDARD | Colusa County, CA | Gas Property | Feb 2012 |
| 18065 | C.C. CARTER | Hughes County, OK | Gas Property | Jan 2025 |
| 18066 | C.C. CITIES SERVICE | Andrews County, TX | Oil & Gas Property | Jan 2025 |
| 18067 | C.C. CURTIS | Athens County, OH | Oil & Gas Property | Dec 2023 |
| 18068 | C.C. LOCKHART & BROWN | Andrews County, TX | Oil & Gas Property | Jan 2025 |
| 18069 | C.C. NIX-FUHRMAN | Andrews County, TX | Oil & Gas Property | Jan 2025 |
| 18070 | C.C.M.O | Kern County, CA | Oil & Gas Property | Aug 1984 |
| 18071 | C.C.M.O | Kings County, CA | Oil & Gas Property | Aug 2024 |
| 18072 | C.D.M. A COM | Eddy County, NM | Oil & Gas Property | Feb 2025 |
| 18073 | C.D.U. 'A' | Yoakum County, TX | Oil & Gas Property | Jan 2025 |
| 18074 | C.E. CALVERT | Stanton County, KS | Gas Property | Dec 2024 |
| 18075 | C.E. HEARD B | Bee County, TX | Oil & Gas Property | Jan 2025 |
| 18076 | C.E. SMITH | Washington County, PA | Oil Property | Dec 2024 |
| 18077 | C.E. STROH 4A MBH-ULW | Dunn County, ND | Oil & Gas Property | Feb 2025 |
| 18078 | C.G. HOOKS ET AL | Harris County, TX | Gas Property | Jan 2025 |
| 18079 | C.G. LUDEMAN B | Loving County, TX | Oil & Gas Property | Jan 2025 |
| 18080 | C.H. BINNEY | Grant County, KS | Gas Property | Dec 2024 |
| 18081 | C.H. ESSE UNIT | Live Oak County, TX | Oil & Gas Property | Jan 2025 |
| 18082 | C.H. KNIGHT | Reeves County, TX | Oil & Gas Property | Jan 2025 |
| 18083 | C.H. RAMIREZ MINERALS LTD | Webb County, TX | Oil & Gas Property | Nov 2024 |
| 18084 | C.H. TAYLOR UNIT A | Live Oak County, TX | Oil & Gas Property | Jan 2025 |
| 18085 | C.H.BRAY ET | Santa Rosa County, FL | Oil & Gas Property | Dec 2024 |
| 18086 | C.J. IVERSON | Liberty County, MT | Oil & Gas Property | Dec 2024 |
| 18087 | C.J.RICKER ESTATE | Haskell County, KS | Gas Property | Dec 2024 |
| 18088 | C.M. ABNEY A HV UNIT | Harrison County, TX | Oil & Gas Property | Jan 2025 |
| 18089 | C.M. HALL A 2 | Starr County, TX | Oil & Gas Property | Jan 2025 |
| 18090 | C.M. RACKEL | Milam County, TX | Oil & Gas Property | Jan 2025 |
| 18091 | C.M.SMITH | Indiana County, PA | Gas Property | Dec 2024 |
| 18092 | C.N. KING | Grant County, KS | Gas Property | Dec 2024 |
| 18093 | C.O. 34-20H | Dunn County, ND | Oil & Gas Property | Feb 2025 |
| 18094 | C.O. MCELROY | Ashtabula County, OH | Oil & Gas Property | Dec 1990 |
| 18095 | C.O. OSWELL | Baldwin County, AL | Oil Property | Oct 2023 |
| 18096 | C.O.BURK | Pontotoc County, OK | Oil Property | Jan 2025 |
| 18097 | C.O.P. TRACT 25 | Centre County, PA | Oil & Gas Property | Dec 2024 |
| 18098 | C.P. CLAYTON | Palo Pinto County, TX | Oil & Gas Property | Feb 2021 |
| 18099 | C.P. DICKERSON | Henderson County, TX | Oil & Gas Property | Jan 2025 |
| 18100 | C.P. NEWMAN | Mobile County, AL | Oil & Gas Property | Nov 2008 |