| 40201 | UL MONTGOMERY 1003-21 | Winkler County, TX | Oil & Gas Property | Jan 2026 |
| 40202 | UL MS HZ BLK 6 | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 40203 | UL MUSTANG 13 | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 40204 | UL NAVY SOUTH | Ward County, TX | Oil & Gas Property | Dec 2025 |
| 40205 | UL OG EAST | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 40206 | UL PAGE 41-44 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40207 | UL PAHASKA | Winkler County, TX | Oil & Gas Property | Jan 2026 |
| 40208 | UL PITCHFORK | Winkler County, TX | Oil & Gas Property | Jan 2026 |
| 40209 | UL PITCHFORK B 20-35-26 | Winkler County, TX | Oil & Gas Property | Jan 2026 |
| 40210 | UL POWDERHORN 8 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40211 | UL RATTLE | Ward County, TX | Oil & Gas Property | Nov 2021 |
| 40212 | UL REAGAN | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 40213 | UL ROY | Ward County, TX | Oil & Gas Property | Jan 2026 |
| 40214 | UL SITKA 12 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40215 | UL SPRINTER | Ward County, TX | Oil & Gas Property | Jan 2026 |
| 40216 | UL SPRUCE 1621-21 | Winkler County, TX | Oil & Gas Property | Jan 2026 |
| 40217 | UL STANOLIND 30-27 | Martin County, TX | Oil & Gas Property | Jan 2026 |
| 40218 | UL STATE LINDSEY DIXON | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 40219 | UL SUGARLOAF | Ward County, TX | Oil & Gas Property | Jan 2026 |
| 40220 | UL SUNSHINE MESA 2 | Winkler County, TX | Oil & Gas Property | Jan 2026 |
| 40221 | UL TALLEY B | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 40222 | UL TAWNY UNIT 8-12 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40223 | UL TENTH CAVALRY | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 40224 | UL THE MACHINE | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 40225 | UL TIFFANY | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 40226 | UL TILDEN 16-31-32 | Ward County, TX | Oil & Gas Property | Dec 2025 |
| 40227 | UL URAD 1609-21 | Winkler County, TX | Oil & Gas Property | Jan 2026 |
| 40228 | UL WASH PARK 2 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40229 | UL WAYLON | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 40230 | UL WILLIE | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 40231 | UL WILLOW 383633-16 | Ward County, TX | Oil & Gas Property | Jan 2026 |
| 40232 | UL WTG 3-233 | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 40233 | UL YANKEE BOY 18-17 | Ward County, TX | Oil & Gas Property | Jan 2026 |
| 40234 | UL YELLOWTAIL | Winkler County, TX | Oil & Gas Property | Jan 2026 |
| 40235 | UL13 KEENE | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40236 | ULANDS 48 | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 40237 | ULLMAN | Gonzales County, TX | Oil & Gas Property | Jan 2026 |
| 40238 | ULLRICH 'A' | Lee County, TX | Oil & Gas Property | Jan 2026 |
| 40239 | ULRICH | Dewitt County, TX | Oil & Gas Property | Jan 2026 |
| 40240 | ULRICH A - WILLIAMS A SA 1 1H | Dewitt County, TX | Oil & Gas Property | Jan 2026 |
| 40241 | ULS 4 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40242 | ULS 4 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40243 | ULS 5 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40244 | ULS 6-3 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40245 | ULS A | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40246 | ULS B | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40247 | ULS CDU | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40248 | ULS CDU 4-1 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40249 | ULVESTAD | Midland County, TX | Oil & Gas Property | Dec 2025 |
| 40250 | ULVESTAD-BIRKHEAD E20 | Midland County, TX | Oil & Gas Property | Jan 2026 |
| 40251 | UMA UNIT | Hill County, TX | Oil & Gas Property | Jan 2026 |
| 40252 | UMBERSON | Montague County, TX | Oil & Gas Property | Jan 2026 |
| 40253 | UMBRELLA POINT UNIT | Chambers County, TX | Oil & Gas Property | Jul 2013 |
| 40254 | UMBRIEL B | Lavaca County, TX | Oil & Gas Property | Jan 2026 |
| 40255 | UMIVERSITY BLOCK 46 | Crockett County, TX | Oil & Gas Property | Jan 2026 |
| 40256 | UMLANG-LEHMANN UNIT | Lee County, TX | Oil & Gas Property | Jan 2026 |
| 40257 | UNA HYRAL | Johnson County, TX | Gas Property | Nov 2025 |
| 40258 | UNBRIDLED 36 | Culberson County, TX | Oil & Gas Property | Jan 2026 |
| 40259 | UNCLE BILL 1 | Lipscomb County, TX | Oil & Gas Property | Jan 2026 |
| 40260 | UNCLE CECIL | Terrell County, TX | Oil & Gas Property | Jan 2026 |
| 40261 | UNCOMPAGHRE STATE UNIT | Reeves County, TX | Oil & Gas Property | Jan 2026 |
| 40262 | UNDER THE BRIDGE 452 | Yoakum County, TX | Oil & Gas Property | Jan 2026 |
| 40263 | UNDERWOOD | Harrison County, TX | Oil & Gas Property | Jan 2026 |
| 40264 | UNDERWOOD | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40265 | UNDERWOOD | Milam County, TX | Oil & Gas Property | Dec 2025 |
| 40266 | UNDERWOOD | Red River County, TX | Oil & Gas Property | Jan 2026 |
| 40267 | UNDERWOOD | Ward County, TX | Oil & Gas Property | Jan 2026 |
| 40268 | UNDERWOOD | Howard County, TX | Oil & Gas Property | Jan 2026 |
| 40269 | UNDERWOOD | Winkler County, TX | Oil & Gas Property | Jan 2026 |
| 40270 | UNDERWOOD ESTATE 1 | Lavaca County, TX | Oil & Gas Property | Dec 2025 |
| 40271 | UNDERWOOD-BREEN | Denton County, TX | Oil & Gas Property | Jan 2026 |
| 40272 | UNDERWOOD-JOHNSON 1 | Hutchinson County, TX | Oil & Gas Property | Jan 2026 |
| 40273 | UNDINE | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40274 | UNFORGIVEN 34 113-114 | Ward County, TX | Oil & Gas Property | Jan 2026 |
| 40275 | UNICORN | Johnson County, TX | Gas Property | Jan 2026 |
| 40276 | UNICORN UNIT | Borden County, TX | Oil & Gas Property | Jan 2026 |
| 40277 | UNIMIN UNIT | Somervell County, TX | Oil & Gas Property | Jan 2026 |
| 40278 | UNION | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40279 | UNION CENT | Nueces County, TX | Oil & Gas Property | Jan 2026 |
| 40280 | UNION CENTRAL | Denton County, TX | Oil & Gas Property | Dec 2025 |
| 40281 | UNION CENTRAL LIFE INS | Nueces County, TX | Gas Property | Jan 2026 |
| 40282 | UNION CENTRAL-CONDEE WELCH (SA) 1H | Denton County, TX | Oil & Gas Property | Dec 2025 |
| 40283 | UNION HILL | Washington County, TX | Oil & Gas Property | Jan 2026 |
| 40284 | UNION PACIFIC | Crockett County, TX | Oil & Gas Property | Jan 2026 |
| 40285 | UNION PACIFIC 7 | Crockett County, TX | Oil & Gas Property | Jan 2026 |
| 40286 | UNION RANCH | Webb County, TX | Oil & Gas Property | Jan 2026 |
| 40287 | UNION VALLEY A | Dawson County, TX | Oil & Gas Property | Jan 2026 |
| 40288 | UNION-STATE | Crockett County, TX | Oil & Gas Property | Jan 2026 |
| 40289 | UNISON | Tarrant County, TX | Gas Property | Jan 2026 |
| 40290 | UNIT | Wood County, TX | Oil Property | Jan 2026 |
| 40291 | UNITED 1 | Moore County, TX | Gas Property | Jan 2026 |
| 40292 | UNITED PRESBYTERIAN CHURCH | Dawson County, TX | Oil & Gas Property | Aug 2015 |
| 40293 | UNIV | Crockett County, TX | Oil & Gas Property | Dec 2025 |
| 40294 | UNIV | Ward County, TX | Oil & Gas Property | Jan 2026 |
| 40295 | UNIV. 11 SEC. 1 | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40296 | UNIV. CONSOLIDATED X | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40297 | UNIV2 HR | Andrews County, TX | Oil & Gas Property | Jan 2026 |
| 40298 | UNIV3 VINCENT2 | Upton County, TX | Oil & Gas Property | Jan 2026 |
| 40299 | UNIV5 | Upton County, TX | Oil & Gas Property | Sep 2022 |
| 40300 | UNIV6 | Crockett County, TX | Oil & Gas Property | Jan 2026 |