| 4301 | SMITH STATE LD12-7 | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4302 | SMITH-WOLTER | La Plata County, CO | Gas Property | Jan 2025 |
| 4303 | SMITS | Weld County, CO | Oil & Gas Property | Apr 2020 |
| 4304 | SNIFF | Bent County, CO | Oil & Gas Property | Jan 2025 |
| 4305 | SNOOK | La Plata County, CO | Gas Property | Jan 2025 |
| 4306 | SNOOKS A | La Plata County, CO | Gas Property | Jan 2025 |
| 4307 | SNOW KING | Lincoln County, CO | Oil & Gas Property | Jan 2025 |
| 4308 | SNOWBIRD | Lincoln County, CO | Oil & Gas Property | Jan 2025 |
| 4309 | SNOWMASS | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4310 | SNYDER | Garfield County, CO | Oil & Gas Property | Jan 2025 |
| 4311 | SNYDER | Garfield County, CO | Oil & Gas Property | Jan 2025 |
| 4312 | SO UTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4313 | SO UTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4314 | SO UTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4315 | SO UTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4316 | SO UTE 3 | La Plata County, CO | Gas Property | Jan 2025 |
| 4317 | SO UTE FC 34 | La Plata County, CO | Gas Property | Jan 2025 |
| 4318 | SO.UTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4319 | SO.UTE FC 33-11 1 | La Plata County, CO | Gas Property | Dec 2024 |
| 4320 | SOC STATE 145 | Yuma County, CO | Oil & Gas Property | Jan 2025 |
| 4321 | SOCO 20 | Weld County, CO | Oil & Gas Property | Jul 2019 |
| 4322 | SOCO 29 | Weld County, CO | Oil & Gas Property | Jan 2020 |
| 4323 | SOEHNER | Yuma County, CO | Gas Property | Jan 2025 |
| 4324 | SOEHNER | Yuma County, CO | Gas Property | Jan 2025 |
| 4325 | SOLDIER CANYON | Garfield County, CO | Gas Property | Jan 2025 |
| 4326 | SOLMAN/CALPHA | Yuma County, CO | Gas Property | Jan 2025 |
| 4327 | SOLVAY CHEMICALS | Garfield County, CO | Oil & Gas Property | Jan 2025 |
| 4328 | SOLVAY GM | Garfield County, CO | Oil & Gas Property | Jan 2025 |
| 4329 | SONIC STAR | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4330 | SOONER | Weld County, CO | Oil & Gas Property | Jul 2019 |
| 4331 | SORENSSON | Weld County, CO | Oil & Gas Property | Mar 2023 |
| 4332 | SORIN NATURAL RESOURCES 2 | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4333 | SOSA | Weld County, CO | Oil & Gas Property | May 2018 |
| 4334 | SOURS | Garfield County, CO | Oil & Gas Property | Jan 2025 |
| 4335 | SOUTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4336 | SOUTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4337 | SOUTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4338 | SOUTE | La Plata County, CO | Oil & Gas Property | Jan 2025 |
| 4339 | SOUTE 32 | La Plata County, CO | Gas Property | Sep 2016 |
| 4340 | SOUTE 32-1 | La Plata County, CO | Gas Property | May 2019 |
| 4341 | SOUTE FC 3 | La Plata County, CO | Gas Property | Jan 2025 |
| 4342 | SOUTE FC 34 | La Plata County, CO | Gas Property | Jan 2025 |
| 4343 | SOUTH 6-2 | Weld County, CO | Oil & Gas Property | Jun 2017 |
| 4344 | SOUTH BAXTER PASS | Garfield County, CO | Gas Property | May 2009 |
| 4345 | SOUTH CANYON-FEDERAL | Garfield County, CO | Oil & Gas Property | Jan 2025 |
| 4346 | SOUTH DOUGLAS CREEK | Rio Blanco County, CO | Gas Property | Jan 2025 |
| 4347 | SOUTH GATE 8-4 | Weld County, CO | Oil & Gas Property | Jun 2022 |
| 4348 | SOUTH LEVERICH 1 | Garfield County, CO | Oil & Gas Property | Jan 2025 |
| 4349 | SOUTH LOST CREEK | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4350 | SOUTH SHALE RIDGE | Mesa County, CO | Gas Property | Jan 2025 |
| 4351 | SOUTHARD | Weld County, CO | Oil & Gas Property | Dec 2020 |
| 4352 | SOUTHERN | La Plata County, CO | Oil & Gas Property | Jan 2025 |
| 4353 | SOUTHERN FC 33-6 6-1 | La Plata County, CO | Gas Property | Jan 2025 |
| 4354 | SOUTHERN U | La Plata County, CO | Oil & Gas Property | Jan 2025 |
| 4355 | SOUTHERN UT | La Plata County, CO | Oil & Gas Property | Jan 2025 |
| 4356 | SOUTHERN UTE | La Plata County, CO | Oil & Gas Property | Jan 2025 |
| 4357 | SOUTHERN UTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4358 | SOUTHERN UTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4359 | SOUTHERN UTE | La Plata County, CO | Gas Property | Jan 2025 |
| 4360 | SOUTHERN UTE F.C 34-9 31-9 | La Plata County, CO | Gas Property | Jan 2025 |
| 4361 | SOUTHWEST RANGELY | Rio Blanco County, CO | Gas Property | Oct 2024 |
| 4362 | SOWER FEDERAL | La Plata County, CO | Gas Property | Jan 2025 |
| 4363 | SPADAFORA 1190 20-21 | Gunnison County, CO | Gas Property | Jan 2025 |
| 4364 | SPADE | Weld County, CO | Oil & Gas Property | Jul 2024 |
| 4365 | SPANISH FORK | La Plata County, CO | Gas Property | Jan 2025 |
| 4366 | SPARBOE | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4367 | SPARGO | Dolores County, CO | Oil & Gas Property | Jan 2025 |
| 4368 | SPARKS B | La Plata County, CO | Gas Property | Jan 2025 |
| 4369 | SPAULDING PEAK 1294 2 | Delta County, CO | Oil & Gas Property | Sep 2008 |
| 4370 | SPAULDING, MARGARET | Jackson County, CO | Oil Property | Oct 2013 |
| 4371 | SPAUR | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4372 | SPAUR 31 | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4373 | SPAUR BROTHERS EH 31 | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4374 | SPAYD | Weld County, CO | Oil & Gas Property | Jun 2020 |
| 4375 | SPEAK FED | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4376 | SPEAKER | Cheyenne County, CO | Oil & Gas Property | Jan 2025 |
| 4377 | SPEAKER | Weld County, CO | Oil & Gas Property | Oct 2024 |
| 4378 | SPECIALTY | Garfield County, CO | Oil & Gas Property | Jan 2025 |
| 4379 | SPECIALTY RESTAUR | Garfield County, CO | Oil & Gas Property | Jan 2025 |
| 4380 | SPEED GOAT FED 343 | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4381 | SPENCER 21 | Weld County, CO | Oil & Gas Property | Nov 2019 |
| 4382 | SPIKE | Weld County, CO | Oil & Gas Property | Nov 2016 |
| 4383 | SPIKE ST | Weld County, CO | Oil & Gas Property | Nov 2020 |
| 4384 | SPIKE ST | Weld County, CO | Oil & Gas Property | Aug 2022 |
| 4385 | SPIKE ST | Weld County, CO | Oil & Gas Property | Jan 2024 |
| 4386 | SPIKE STATE CC 6 | Weld County, CO | Oil & Gas Property | Oct 2016 |
| 4387 | SPINNEY 0 | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4388 | SPOMER | Weld County, CO | Oil & Gas Property | Jul 2019 |
| 4389 | SPOTTED | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4390 | SPRAGUE | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4391 | SPUR | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4392 | SPURLING | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4393 | SQUAW CANYON | Dolores County, CO | Oil & Gas Property | Aug 2016 |
| 4394 | SQUIRES | La Plata County, CO | Gas Property | Dec 2024 |
| 4395 | SRC 3 | Weld County, CO | Oil & Gas Property | Jul 2017 |
| 4396 | SRC AIMS | Weld County, CO | Oil & Gas Property | May 2017 |
| 4397 | SRC BESTWAY | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4398 | SRC CANNON | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4399 | SRC GCC | Weld County, CO | Oil & Gas Property | Jun 2017 |
| 4400 | SRC GEIS T-15-22NHZ | Weld County, CO | Oil & Gas Property | Jan 2025 |