| 18301 | C. S. HIGH 1 | Seward County, KS | Gas Property | Apr 2025 |
| 18302 | C. S. NORTON | Finney County, KS | Gas Property | Apr 2025 |
| 18303 | C. S. UNDERWOOD | Greenwood County, KS | Oil Property | Sep 2022 |
| 18304 | C. SMITH | Montgomery County, KS | Oil & Gas Property | Jun 2020 |
| 18305 | C. SOLBERG | Sheridan County, MT | Oil & Gas Property | May 2025 |
| 18306 | C. TUCKER | Montgomery County, KS | Gas Property | Apr 2025 |
| 18307 | C. W. A 1 | Wise County, TX | Oil & Gas Property | Apr 2025 |
| 18308 | C. W. A 2 | Wise County, TX | Oil & Gas Property | Apr 2025 |
| 18309 | C. W. A 3 | Wise County, TX | Oil & Gas Property | Apr 2025 |
| 18310 | C. W. B 2 | Wise County, TX | Oil & Gas Property | Apr 2025 |
| 18311 | C. W. B 3 | Wise County, TX | Oil & Gas Property | Apr 2025 |
| 18312 | C. W. LOGSDON -A | Andrews County, TX | Oil & Gas Property | May 2025 |
| 18313 | C. WINGER | Stanton County, KS | Gas Property | Apr 2025 |
| 18314 | C. WINNEY | Payne County, OK | Oil & Gas Property | Apr 2025 |
| 18315 | C.A. 2820 | Woods County, OK | Oil & Gas Property | May 2025 |
| 18316 | C.A. DYER-PUMA | Newton County, TX | Oil & Gas Property | May 2025 |
| 18317 | C.A. WEST ESTATE | Westmoreland County, PA | Gas Property | Dec 2024 |
| 18318 | C.B. MORGAN | Choctaw County, AL | Oil Property | Aug 1978 |
| 18319 | C.B. STODDARD | Colusa County, CA | Gas Property | Feb 2012 |
| 18320 | C.C. CARTER | Hughes County, OK | Gas Property | Apr 2025 |
| 18321 | C.C. CITIES SERVICE | Andrews County, TX | Oil & Gas Property | May 2025 |
| 18322 | C.C. CURTIS | Athens County, OH | Oil & Gas Property | Dec 2024 |
| 18323 | C.C. LOCKHART & BROWN | Andrews County, TX | Oil & Gas Property | May 2025 |
| 18324 | C.C. NIX-FUHRMAN | Andrews County, TX | Oil & Gas Property | May 2025 |
| 18325 | C.C.CHERRY | Pottawatomie County, OK | Oil Property | May 2025 |
| 18326 | C.C.M.O | Kern County, CA | Oil & Gas Property | Aug 1984 |
| 18327 | C.C.M.O | Kings County, CA | Oil & Gas Property | Aug 2024 |
| 18328 | C.D.M. A COM | Eddy County, NM | Oil & Gas Property | May 2025 |
| 18329 | C.D.SMITH | Carter County, OK | Oil Property | Jun 2021 |
| 18330 | C.D.U. 'A' | Yoakum County, TX | Oil & Gas Property | May 2025 |
| 18331 | C.E. CALVERT | Stanton County, KS | Gas Property | Apr 2025 |
| 18332 | C.E. HEARD B | Bee County, TX | Oil & Gas Property | May 2025 |
| 18333 | C.E. SMITH | Washington County, PA | Oil Property | Dec 2024 |
| 18334 | C.E. STROH 4A MBH-ULW | Dunn County, ND | Oil & Gas Property | May 2025 |
| 18335 | C.G. HOOKS ET AL | Harris County, TX | Gas Property | May 2025 |
| 18336 | C.G. LUDEMAN B | Loving County, TX | Oil & Gas Property | Apr 2025 |
| 18337 | C.H. BINNEY | Grant County, KS | Gas Property | Apr 2025 |
| 18338 | C.H. ESSE UNIT | Live Oak County, TX | Oil & Gas Property | May 2025 |
| 18339 | C.H. KNIGHT | Reeves County, TX | Oil & Gas Property | May 2025 |
| 18340 | C.H. RAMIREZ MINERALS LTD | Webb County, TX | Oil & Gas Property | Dec 2024 |
| 18341 | C.H. TAYLOR UNIT A | Live Oak County, TX | Oil & Gas Property | May 2025 |
| 18342 | C.H.BRAY ET | Santa Rosa County, FL | Oil & Gas Property | Dec 2024 |
| 18343 | C.J. IVERSON | Liberty County, MT | Oil & Gas Property | Apr 2025 |
| 18344 | C.J.RICKER ESTATE | Haskell County, KS | Gas Property | Apr 2025 |
| 18345 | C.M. ABNEY A HV UNIT | Harrison County, TX | Oil & Gas Property | May 2025 |
| 18346 | C.M. HALL A 2 | Starr County, TX | Oil & Gas Property | May 2025 |
| 18347 | C.M. RACKEL | Milam County, TX | Oil & Gas Property | Apr 2025 |
| 18348 | C.N. KING | Grant County, KS | Gas Property | Apr 2025 |
| 18349 | C.NOBLE | Payne County, OK | Oil Property | Dec 2024 |
| 18350 | C.O. & W.H. OSWELL #3 | Baldwin County, AL | Oil Property | Apr 2025 |
| 18351 | C.O. 34-20H | Dunn County, ND | Oil & Gas Property | May 2025 |
| 18352 | C.O. MCELROY | Ashtabula County, OH | Oil & Gas Property | Dec 1990 |
| 18353 | C.O. OSWELL | Baldwin County, AL | Oil Property | Oct 2023 |
| 18354 | C.O. SPECK 262 | Dawson County, TX | Oil & Gas Property | May 2025 |
| 18355 | C.O.BURK | Pontotoc County, OK | Oil Property | Apr 2025 |
| 18356 | C.O.P. TRACT 25 | Centre County, PA | Oil & Gas Property | Dec 2024 |
| 18357 | C.P. CLAYTON | Palo Pinto County, TX | Oil & Gas Property | Feb 2021 |
| 18358 | C.P. DICKERSON | Henderson County, TX | Oil & Gas Property | May 2025 |
| 18359 | C.P. NEWMAN | Mobile County, AL | Oil & Gas Property | Nov 2008 |
| 18360 | C.PFEIL-C.KELLNER-C.HUMMEL PSA | Atascosa County, TX | Oil & Gas Property | May 2025 |
| 18361 | C.R. JR. & A.H. HAGEDORN HEAVEN HILL | Marshall County, WV | Oil & Gas Property | Dec 2021 |
| 18362 | C.S.-STATE | Ward County, TX | Oil & Gas Property | Mar 2021 |
| 18363 | C.S.O. 1 | Los Angeles County, CA | Oil & Gas Property | Aug 1989 |
| 18364 | C.S.O. 2 | Los Angeles County, CA | Oil & Gas Property | Aug 1989 |
| 18365 | C.V.G.S | Colusa County, CA | Gas Property | Jun 2025 |
| 18366 | C.V.MOORE | Tarrant County, TX | Oil & Gas Property | May 2025 |
| 18367 | C.W. HAHN UNIT A | Dewitt County, TX | Oil & Gas Property | May 2025 |
| 18368 | C.W. MCCONAUGHEY JR & HEIRS | Indiana County, PA | Gas Property | Dec 2024 |
| 18369 | C.W.O.D | Los Angeles County, CA | Oil & Gas Property | May 2025 |
| 18370 | C4 RANCH | La Salle County, TX | Oil & Gas Property | May 2025 |
| 18371 | CA 8 | Montezuma County, CO | Oil & Gas Property | Jun 2025 |
| 18372 | CA C 158-93-21-23 | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 18373 | CA S 158-93-21-23 | Mountrail County, ND | Oil & Gas Property | May 2025 |
| 18374 | CA-ANDERSON SMITH | Williams County, ND | Oil & Gas Property | May 2025 |
| 18375 | CA-E BURDICK | Williams County, ND | Oil & Gas Property | May 2025 |
| 18376 | CA-FERGUSON SMITH | Williams County, ND | Oil & Gas Property | May 2025 |
| 18377 | CA-HALVERSON 154-95-0409H | Williams County, ND | Oil & Gas Property | May 2025 |
| 18378 | CA-RUSSELL SMITH- 155-96-2425H | Williams County, ND | Oil & Gas Property | May 2025 |
| 18379 | CA-STANGELAND- 155-95-2128H | Williams County, ND | Oil & Gas Property | May 2025 |
| 18380 | CAB -A | Gray County, TX | Oil & Gas Property | May 2025 |
| 18381 | CAB HUGHES | Pittsburg County, OK | Gas Property | Apr 2025 |
| 18382 | CABALLO | Campbell County, WY | Gas Property | Nov 2008 |
| 18383 | CABALLO | Campbell County, WY | Gas Property | Mar 2007 |
| 18384 | CABALLO | Campbell County, WY | Gas Property | May 2011 |
| 18385 | CABALLO | Campbell County, WY | Gas Property | Jul 2005 |
| 18386 | CABALLO | Campbell County, WY | Gas Property | Jul 2011 |
| 18387 | CABALLO | Brazos County, TX | Oil & Gas Property | May 2025 |
| 18388 | CABALLO | San Juan County, UT | Oil & Gas Property | May 2011 |
| 18389 | CABALLO | Campbell County, WY | Oil & Gas Property | May 2025 |
| 18390 | CABALLO 23 FEDERAL | Lea County, NM | Oil & Gas Property | May 2025 |
| 18391 | CABALLO AZUL 28-33 | Dawson County, TX | Oil & Gas Property | May 2025 |
| 18392 | CABALLO COAL FEDERAL | Campbell County, WY | Gas Property | Dec 2006 |
| 18393 | CABE | Lafayette County, AR | Oil Property | Mar 1971 |
| 18394 | CABE TROY | Hemphill County, TX | Oil & Gas Property | May 2025 |
| 18395 | CABEEN | Pecos County, TX | Oil & Gas Property | May 2025 |
| 18396 | CABELL, ALBERT | Logan County, WV | Gas Property | Dec 2021 |
| 18397 | CABERNET | Martin County, TX | Oil & Gas Property | May 2025 |
| 18398 | CABEZON | Webb County, TX | Oil & Gas Property | May 2025 |
| 18399 | CABIN | Okmulgee County, OK | Oil & Gas Property | May 2012 |
| 18400 | CABIN CR | Fallon County, MT | Oil & Gas Property | May 2025 |