| 28301 | CSF 2 | Garfield County, CO | Oil & Gas Property | May 2026 |
| 28302 | CSF 3 | Garfield County, CO | Oil & Gas Property | May 2026 |
| 28303 | CSF 4 | Garfield County, CO | Oil & Gas Property | May 2026 |
| 28304 | CSFED 1 | Sweetwater County, WY | Oil & Gas Property | Jul 2026 |
| 28305 | CSI 2H | Bradford County, PA | Gas Property | Jun 2026 |
| 28306 | CSI 5H | Bradford County, PA | Gas Property | Jun 2026 |
| 28307 | CSPC | Guernsey County, OH | Oil & Gas Property | Dec 2025 |
| 28308 | CST UNIT | Gonzales County, TX | Oil & Gas Property | Jun 2026 |
| 28309 | CSTSU | Rosebud County, MT | Oil Property | Jul 2025 |
| 28310 | CT 35 | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 28311 | CT 39 | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 28312 | CTA STATE COM | Eddy County, NM | Oil & Gas Property | Jul 2026 |
| 28313 | CTC UNIT | Stephens County, TX | Oil & Gas Property | Jun 2026 |
| 28314 | CTF 32-13-4 | Carroll County, OH | Oil & Gas Property | Jun 2026 |
| 28315 | CTL OBRIEN ET AL | Dawson County, TX | Oil & Gas Property | Jun 2026 |
| 28316 | CTLC 2 | Lee County, FL | Oil & Gas Property | May 2018 |
| 28317 | CTU-FEE | Weston County, WY | Oil & Gas Property | Aug 1997 |
| 28318 | CU DOWNS FED | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 28319 | CU DOWNS FED 28 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 28320 | CU DOWNS FED 3 | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 28321 | CU REPP FED 09-213769-1XTPH | Converse County, WY | Oil & Gas Property | Jul 2026 |
| 28322 | CUADRILLA | Grady County, OK | Oil & Gas Property | Jun 2026 |
| 28323 | CUADRITO AZO FEDERAL | Eddy County, NM | Oil & Gas Property | Jul 2026 |
| 28324 | CUATRO HIJOS FEE | Lea County, NM | Oil & Gas Property | Jun 2026 |
| 28325 | CUB 56-2-33 1H | Reeves County, TX | Oil & Gas Property | Jun 2026 |
| 28326 | CUB CREEK COAL CO. A | Wyoming County, WV | Gas Property | Dec 2021 |
| 28327 | CUB FE | Johnson County, WY | Oil & Gas Property | Jul 2026 |
| 28328 | CUBBISON | Guernsey County, OH | Oil Property | Dec 2025 |
| 28329 | CUBBON | Venango County, PA | Oil Property | Dec 1997 |
| 28330 | CUBBON | Venango County, PA | Gas Property | Dec 2025 |
| 28331 | CUBBON | Venango County, PA | Oil & Gas Property | Dec 2025 |
| 28332 | CUBBON LUMBER CO | Warren County, PA | Gas Property | Dec 2025 |
| 28333 | CUBINE | Gray County, TX | Gas Property | Jun 2026 |
| 28334 | CUBINE | Clay County, TX | Oil & Gas Property | Jun 2026 |
| 28335 | CUCCIA COM | San Juan County, NM | Oil & Gas Property | Jun 2026 |
| 28336 | CUCCIA STATE COM | San Juan County, NM | Gas Property | Jun 2026 |
| 28337 | CUCCIA-U.S.L | Kern County, CA | Oil & Gas Property | Jul 2025 |
| 28338 | CUCH 10-17-2-1E | Uintah County, UT | Oil & Gas Property | Jun 2026 |
| 28339 | CUDA 1 | Williams County, ND | Oil & Gas Property | Jun 2026 |
| 28340 | CUDAHY | Kent County, MI | Oil Property | Jun 2026 |
| 28341 | CUDD | Ochiltree County, TX | Oil & Gas Property | May 2026 |
| 28342 | CUDE | Chautauqua County, KS | Oil & Gas Property | Jul 2014 |
| 28343 | CUDE A | Wise County, TX | Oil & Gas Property | Jun 2026 |
| 28344 | CUDE W.T | Caldwell County, TX | Oil & Gas Property | May 2026 |
| 28345 | CUDJO | Seminole County, OK | Oil Property | Mar 2025 |
| 28346 | CUDJO | Seminole County, OK | Oil Property | Jun 2026 |
| 28347 | CUDJO-PALMER 1 | Seminole County, OK | Oil Property | Jun 2026 |
| 28348 | CUDNEY | Edwards County, KS | Oil & Gas Property | May 2026 |
| 28349 | CUELLAR | Zapata County, TX | Oil & Gas Property | Jun 2026 |
| 28350 | CUELLAR | Zapata County, TX | Oil & Gas Property | Jun 2026 |
| 28351 | CUELLAR | Zapata County, TX | Oil & Gas Property | Jun 2026 |
| 28352 | CUELLAR | Atascosa County, TX | Oil & Gas Property | Jun 2026 |
| 28353 | CUELLAR | Zapata County, TX | Oil & Gas Property | Jun 2026 |
| 28354 | CUELLAR FERNA | Zapata County, TX | Oil & Gas Property | Jun 2026 |
| 28355 | CUELLAR MA | Zapata County, TX | Oil & Gas Property | Jun 2026 |
| 28356 | CUELLAR-GRAVES GAS UNIT | Zapata County, TX | Oil & Gas Property | Jun 2026 |
| 28357 | CUERNO | Lea County, NM | Oil & Gas Property | Jul 2026 |
| 28358 | CUERVO FEDERAL | Lea County, NM | Oil & Gas Property | Jun 2026 |
| 28359 | CUFFMAN | Denton County, TX | Oil & Gas Property | Jun 2026 |
| 28360 | CUGNINI A | La Plata County, CO | Gas Property | May 2026 |
| 28361 | CUL-RAY | Wise County, TX | Oil & Gas Property | May 2026 |
| 28362 | CULBERSON | Brown County, TX | Oil & Gas Property | May 2026 |
| 28363 | CULBERSON | Culberson County, TX | Oil & Gas Property | Jun 2026 |
| 28364 | CULBERSON-HUGHES UNIT | Karnes County, TX | Oil & Gas Property | Jun 2026 |
| 28365 | CULBERSON-PATTESON UNIT | Karnes County, TX | Oil & Gas Property | Jun 2026 |
| 28366 | CULBERT | Ventura County, CA | Oil & Gas Property | Jul 2026 |
| 28367 | CULBERTSON | Clarion County, PA | Oil & Gas Property | Dec 2025 |
| 28368 | CULBERTSON | Carson County, TX | Gas Property | Jun 2026 |
| 28369 | CULBERTSON | Hitchcock County, NE | Oil Property | Dec 2025 |
| 28370 | CULBERTSON | Terrell County, TX | Oil & Gas Property | Jun 2026 |
| 28371 | CULBERTSON | Bienville Parish, LA | Oil & Gas Property | Dec 2024 |
| 28372 | CULBERTSON | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 28373 | CULBERTSON | Armstrong County, PA | Gas Property | Dec 2025 |
| 28374 | CULBERTSON | Jones County, TX | Oil & Gas Property | Sep 2023 |
| 28375 | CULBREATH | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 28376 | CULBREATH, BOB | Warren County, KY | Oil & Gas Property | Dec 2023 |
| 28377 | CULEBRA BLV FEDERAL COM | Eddy County, NM | Oil & Gas Property | Jul 2026 |
| 28378 | CULLAR UNIT | Grayson County, TX | Oil & Gas Property | Jun 2026 |
| 28379 | CULLEN | Holmes County, OH | Oil & Gas Property | Dec 2025 |
| 28380 | CULLEN | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 28381 | CULLEN | Harrison County, TX | Oil & Gas Property | Jun 2026 |
| 28382 | CULLEN | Alfalfa County, OK | Oil & Gas Property | Jul 2026 |
| 28383 | CULLEN | Okmulgee County, OK | Gas Property | Nov 2014 |
| 28384 | CULLEN | Colorado County, TX | Oil & Gas Property | Jun 2026 |
| 28385 | CULLEN | Washington County, OH | Oil & Gas Property | Dec 2025 |
| 28386 | CULLEN L | Washington County, OH | Gas Property | Dec 2025 |
| 28387 | CULLEN UNIT A | Live Oak County, TX | Oil & Gas Property | Jun 2026 |
| 28388 | CULLEN-H | Colorado County, TX | Oil & Gas Property | Jun 2026 |
| 28389 | CULLER | Gray County, TX | Oil & Gas Property | Jun 2026 |
| 28390 | CULLER I | Ashland County, OH | Oil Property | Dec 2025 |
| 28391 | CULLERS | Young County, TX | Oil & Gas Property | Feb 2005 |
| 28392 | CULLERS J. EDGAR GAS UNIT | Rusk County, TX | Oil & Gas Property | Jun 2026 |
| 28393 | CULLEY | Seminole County, OK | Oil Property | Nov 2019 |
| 28394 | CULLEY | Graham County, KS | Oil Property | Mar 2026 |
| 28395 | CULLI | Bee County, TX | Oil & Gas Property | Mar 2019 |
| 28396 | CULLINAN FEE | Caddo Parish, LA | Oil & Gas Property | Jan 2025 |
| 28397 | CULLINS FEDERAL | Rio Arriba County, NM | Oil & Gas Property | Jun 2026 |
| 28398 | CULLISON | Johnson County, TX | Gas Property | Apr 2026 |
| 28399 | CULLISON | Stevens County, KS | Oil & Gas Property | Mar 2026 |
| 28400 | CULLISON | Licking County, OH | Oil & Gas Property | Dec 2025 |