| 40301 | UL MAYFLOWER 42-18 | Ward County, TX | Oil & Gas Property | May 2024 |
| 40302 | UL MCNASSER 0201-17 | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 40303 | UL MILL 3427-21 | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 40304 | UL MOCKINGBIRD 13-2 | Martin County, TX | Oil & Gas Property | Jun 2026 |
| 40305 | UL MONTGOMERY 1003-21 | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 40306 | UL MS HZ BLK 6 | Martin County, TX | Oil & Gas Property | Jun 2026 |
| 40307 | UL MUSTANG 13 | Martin County, TX | Oil & Gas Property | Jun 2026 |
| 40308 | UL NAVY SOUTH | Ward County, TX | Oil & Gas Property | May 2026 |
| 40309 | UL OG EAST | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 40310 | UL PAGE 41-44 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40311 | UL PAHASKA | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 40312 | UL PITCHFORK | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 40313 | UL POWDERHORN 8 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40314 | UL RATTLE | Ward County, TX | Oil & Gas Property | Nov 2021 |
| 40315 | UL REAGAN | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 40316 | UL ROY | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 40317 | UL SASQUATCH 1-37 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40318 | UL SITKA 12 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40319 | UL SPRINTER | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 40320 | UL SPRUCE 1621-21 | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 40321 | UL STANOLIND 30-27 | Martin County, TX | Oil & Gas Property | Jun 2026 |
| 40322 | UL STATE LINDSEY DIXON | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 40323 | UL SUGARLOAF | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 40324 | UL SUNSHINE MESA 2 | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 40325 | UL TALLEY B | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 40326 | UL TAWNY UNIT 8-12 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40327 | UL TENTH CAVALRY | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 40328 | UL THE MACHINE | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 40329 | UL TIFFANY | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 40330 | UL TILDEN 16-31-32 | Ward County, TX | Oil & Gas Property | May 2026 |
| 40331 | UL URAD 1609-21 | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 40332 | UL WASH PARK 2 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40333 | UL WAYLON | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 40334 | UL WILLIE | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 40335 | UL WILLOW 383633-16 | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 40336 | UL WOLVERINE 22507 | Crane County, TX | Oil & Gas Property | Jun 2026 |
| 40337 | UL WTG 3-233 | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 40338 | UL YELLOWTAIL | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 40339 | UL13 KEENE | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40340 | ULANDS 48 | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 40341 | ULLMAN | Gonzales County, TX | Oil & Gas Property | Jun 2026 |
| 40342 | ULLRICH 'A' | Lee County, TX | Oil & Gas Property | Jun 2026 |
| 40343 | ULRICH | Dewitt County, TX | Oil & Gas Property | Jun 2026 |
| 40344 | ULRICH A - WILLIAMS A SA 1 1H | Dewitt County, TX | Oil & Gas Property | Jun 2026 |
| 40345 | ULS 4 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40346 | ULS 4 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40347 | ULS 5 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40348 | ULS 5-9 UNIT | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40349 | ULS 6-3 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40350 | ULS A | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40351 | ULS B | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40352 | ULS CDU | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40353 | ULS CDU 4-1 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40354 | ULVESTAD | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 40355 | ULVESTAD-BIRKHEAD E20 | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 40356 | UMA UNIT | Hill County, TX | Oil & Gas Property | Jun 2026 |
| 40357 | UMBERSON | Montague County, TX | Oil & Gas Property | Jun 2026 |
| 40358 | UMBRELLA POINT UNIT | Chambers County, TX | Oil & Gas Property | Jul 2013 |
| 40359 | UMBRIEL B | Lavaca County, TX | Oil & Gas Property | Jun 2026 |
| 40360 | UMIVERSITY BLOCK 46 | Crockett County, TX | Oil & Gas Property | Jun 2026 |
| 40361 | UMLANG-LEHMANN UNIT | Lee County, TX | Oil & Gas Property | Jun 2026 |
| 40362 | UNA HYRAL | Johnson County, TX | Gas Property | Jun 2026 |
| 40363 | UNBRIDLED 36 | Culberson County, TX | Oil & Gas Property | Apr 2026 |
| 40364 | UNCLE BILL 1 | Lipscomb County, TX | Oil & Gas Property | Jun 2026 |
| 40365 | UNCLE CECIL | Terrell County, TX | Oil & Gas Property | Jun 2026 |
| 40366 | UNCOMPAGHRE STATE UNIT | Reeves County, TX | Oil & Gas Property | Jun 2026 |
| 40367 | UNDER THE BRIDGE 452 | Yoakum County, TX | Oil & Gas Property | Jun 2026 |
| 40368 | UNDERWOOD | Harrison County, TX | Oil & Gas Property | Jun 2026 |
| 40369 | UNDERWOOD | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40370 | UNDERWOOD | Milam County, TX | Oil & Gas Property | Jun 2026 |
| 40371 | UNDERWOOD | Red River County, TX | Oil & Gas Property | Jun 2026 |
| 40372 | UNDERWOOD | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 40373 | UNDERWOOD | Howard County, TX | Oil & Gas Property | Jun 2026 |
| 40374 | UNDERWOOD | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 40375 | UNDERWOOD-BREEN | Denton County, TX | Oil & Gas Property | Jun 2026 |
| 40376 | UNDERWOOD-JOHNSON 1 | Hutchinson County, TX | Oil & Gas Property | May 2026 |
| 40377 | UNDINE | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40378 | UNFORGIVEN 34 113-114 | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 40379 | UNICORN | Johnson County, TX | Gas Property | Jun 2026 |
| 40380 | UNICORN UNIT | Borden County, TX | Oil & Gas Property | Jun 2026 |
| 40381 | UNIMIN UNIT | Somervell County, TX | Oil & Gas Property | Jun 2026 |
| 40382 | UNION | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40383 | UNION CENT | Nueces County, TX | Oil & Gas Property | May 2026 |
| 40384 | UNION CENTRAL | Denton County, TX | Oil & Gas Property | Jun 2026 |
| 40385 | UNION CENTRAL LIFE INS | Nueces County, TX | Gas Property | Jun 2026 |
| 40386 | UNION CENTRAL-CONDEE WELCH (SA) 1H | Denton County, TX | Oil & Gas Property | Jun 2026 |
| 40387 | UNION HILL | Washington County, TX | Oil & Gas Property | Jun 2026 |
| 40388 | UNION PACIFIC | Crockett County, TX | Oil & Gas Property | Jun 2026 |
| 40389 | UNION PACIFIC 7 | Crockett County, TX | Oil & Gas Property | Jun 2026 |
| 40390 | UNION RANCH | Webb County, TX | Oil & Gas Property | May 2026 |
| 40391 | UNION VALLEY A | Dawson County, TX | Oil & Gas Property | Jun 2026 |
| 40392 | UNION-STATE | Crockett County, TX | Oil & Gas Property | Jun 2026 |
| 40393 | UNISON | Tarrant County, TX | Gas Property | Jun 2026 |
| 40394 | UNIT | Wood County, TX | Oil Property | Jun 2026 |
| 40395 | UNITED 1 | Moore County, TX | Gas Property | May 2026 |
| 40396 | UNITED PRESBYTERIAN CHURCH | Dawson County, TX | Oil & Gas Property | Aug 2015 |
| 40397 | UNIV | Crockett County, TX | Oil & Gas Property | Apr 2026 |
| 40398 | UNIV | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 40399 | UNIV. 11 SEC. 1 | Andrews County, TX | Oil & Gas Property | Jun 2026 |
| 40400 | UNIV. CONSOLIDATED X | Andrews County, TX | Oil & Gas Property | Jun 2026 |