| 4201 | SHINNECOCK | Kiowa County, CO | Gas Property | Jun 2003 |
| 4202 | SHIVELY | Adams County, CO | Oil & Gas Property | Sep 2021 |
| 4203 | SHIVELY | Yuma County, CO | Gas Property | Feb 2025 |
| 4204 | SHIVERS | Weld County, CO | Oil & Gas Property | Dec 2017 |
| 4205 | SHOEMAKER | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4206 | SHOEMAKER 01-34 | La Plata County, CO | Gas Property | Feb 2025 |
| 4207 | SHOENEMAN | Weld County, CO | Oil & Gas Property | Sep 2014 |
| 4208 | SHOOK 3-10 | Adams County, CO | Oil & Gas Property | Feb 2025 |
| 4209 | SHORE 16 | Garfield County, CO | Oil & Gas Property | Feb 2025 |
| 4210 | SHORT | Yuma County, CO | Oil & Gas Property | Feb 2025 |
| 4211 | SHORTY | Morgan County, CO | Oil & Gas Property | May 2023 |
| 4212 | SHOVELER FED | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4213 | SHOVELER GOLDENEYE FED 21-16-1HN | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4214 | SHOVELER HUNT FED 19-24-16HN | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4215 | SHOWERS | Weld County, CO | Oil & Gas Property | Apr 2021 |
| 4216 | SHUFLY STATE Y34-7 | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4217 | SHULL | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4218 | SHULTZ | Weld County, CO | Oil & Gas Property | Apr 2023 |
| 4219 | SHULTZ | Weld County, CO | Oil & Gas Property | Nov 2018 |
| 4220 | SHUPE 13 | Weld County, CO | Oil & Gas Property | Jan 2023 |
| 4221 | SHUR VIEW | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4222 | SHUTT | Weld County, CO | Oil & Gas Property | Aug 2014 |
| 4223 | SICKLER | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4224 | SIDNEY STREAR | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4225 | SIDWELL | Weld County, CO | Oil & Gas Property | Dec 2015 |
| 4226 | SIEBRING | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4227 | SIERRA M | Arapahoe County, CO | Oil & Gas Property | Feb 2025 |
| 4228 | SIEVERS | Weld County, CO | Oil & Gas Property | Mar 2024 |
| 4229 | SIEVERS | Weld County, CO | Oil & Gas Property | Sep 2020 |
| 4230 | SIGG | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4231 | SILT VALLEY | Garfield County, CO | Oil & Gas Property | Feb 2025 |
| 4232 | SILVA | Weld County, CO | Oil & Gas Property | Aug 2019 |
| 4233 | SILVER | Las Animas County, CO | Gas Property | Feb 2025 |
| 4234 | SILVERTON 5 | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4235 | SIMINOE | Mesa County, CO | Oil & Gas Property | Jul 2017 |
| 4236 | SIMMONS | Yuma County, CO | Gas Property | Feb 2025 |
| 4237 | SIMMONS | Yuma County, CO | Gas Property | Feb 2025 |
| 4238 | SIMMONS | Weld County, CO | Oil & Gas Property | Feb 2023 |
| 4239 | SIMMONS | La Plata County, CO | Gas Property | Feb 2025 |
| 4240 | SIMMS | La Plata County, CO | Gas Property | Feb 2025 |
| 4241 | SIMON LAND & CATTLE | La Plata County, CO | Gas Property | Feb 2025 |
| 4242 | SIMONSEN | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4243 | SIMONSEN-SCHAEFER 7 | Weld County, CO | Oil & Gas Property | Jan 2025 |
| 4244 | SIMPSON | Adams County, CO | Oil & Gas Property | Jan 2025 |
| 4245 | SIMPSON | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4246 | SIMPSON | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4247 | SIMPSON 2 | Moffat County, CO | Gas Property | Dec 2024 |
| 4248 | SIMPSON MD 2 | Boulder County, CO | Oil & Gas Property | May 2023 |
| 4249 | SINDT 1 | Logan County, CO | Oil Property | Feb 2025 |
| 4250 | SINGER E 34 | Weld County, CO | Oil & Gas Property | Aug 2016 |
| 4251 | SINGLE EAGLE | San Miguel County, CO | Oil & Gas Property | Dec 2024 |
| 4252 | SINJIN | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4253 | SIRIOS | Weld County, CO | Oil & Gas Property | May 2013 |
| 4254 | SIRIOS BROTHERS | Weld County, CO | Oil & Gas Property | Sep 2015 |
| 4255 | SITTON | La Plata County, CO | Gas Property | Feb 2025 |
| 4256 | SITTON FEDERAL | La Plata County, CO | Gas Property | Feb 2025 |
| 4257 | SITZMAN | Weld County, CO | Oil & Gas Property | Dec 2017 |
| 4258 | SITZMAN | Weld County, CO | Oil & Gas Property | May 2017 |
| 4259 | SITZMAN | Weld County, CO | Oil & Gas Property | Oct 2016 |
| 4260 | SITZMAN | Weld County, CO | Oil & Gas Property | Apr 2013 |
| 4261 | SKAER | Larimer County, CO | Oil & Gas Property | Jun 2017 |
| 4262 | SKI 3 | Rio Blanco County, CO | Oil Property | Apr 2009 |
| 4263 | SKIM | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4264 | SKIM STATE | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4265 | SKINNER RIDGE | Garfield County, CO | Oil & Gas Property | Feb 2025 |
| 4266 | SKR 59 | Garfield County, CO | Oil & Gas Property | Feb 2025 |
| 4267 | SKR 698 | Garfield County, CO | Oil & Gas Property | Feb 2025 |
| 4268 | SKURICH | Weld County, CO | Oil & Gas Property | Mar 2019 |
| 4269 | SKY RANCH 4-65 | Arapahoe County, CO | Oil & Gas Property | Feb 2025 |
| 4270 | SKYWAY | Weld County, CO | Oil & Gas Property | Aug 2019 |
| 4271 | SLANOVICH | Fremont County, CO | Oil Property | Oct 2022 |
| 4272 | SLATER | Weld County, CO | Oil & Gas Property | Jul 2018 |
| 4273 | SLEDGE C 9 | Weld County, CO | Oil & Gas Property | Sep 2016 |
| 4274 | SLEEPING UTE | Montezuma County, CO | Oil & Gas Property | Feb 2025 |
| 4275 | SLICK ROCK | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4276 | SLUGGER | La Plata County, CO | Gas Property | Mar 2025 |
| 4277 | SLW GREEN STATE BB 18 | Weld County, CO | Oil & Gas Property | Feb 2021 |
| 4278 | SLW RANCH | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4279 | SLW STATE | Weld County, CO | Oil & Gas Property | Jun 2021 |
| 4280 | SMALL | Washington County, CO | Gas Property | Feb 2025 |
| 4281 | SMART | Logan County, CO | Oil & Gas Property | Feb 2009 |
| 4282 | SMITH | Yuma County, CO | Oil & Gas Property | Feb 2025 |
| 4283 | SMITH | Weld County, CO | Oil & Gas Property | Oct 2016 |
| 4284 | SMITH 2 | Yuma County, CO | Gas Property | Feb 2025 |
| 4285 | SMITH A 1 | La Plata County, CO | Gas Property | Feb 2025 |
| 4286 | SMITH FEDERAL | La Plata County, CO | Gas Property | Feb 2025 |
| 4287 | SMITH STATE LD12-7 | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4288 | SMITH-WOLTER | La Plata County, CO | Gas Property | Feb 2025 |
| 4289 | SMITS | Weld County, CO | Oil & Gas Property | Apr 2020 |
| 4290 | SNIFF | Bent County, CO | Oil & Gas Property | Feb 2025 |
| 4291 | SNOOK | La Plata County, CO | Gas Property | Feb 2025 |
| 4292 | SNOOKS A | La Plata County, CO | Gas Property | Feb 2025 |
| 4293 | SNOW KING | Lincoln County, CO | Oil & Gas Property | Feb 2025 |
| 4294 | SNOWBIRD | Lincoln County, CO | Oil & Gas Property | Feb 2025 |
| 4295 | SNOWMASS | Weld County, CO | Oil & Gas Property | Feb 2025 |
| 4296 | SNYDER | Garfield County, CO | Oil & Gas Property | Feb 2025 |
| 4297 | SNYDER | Garfield County, CO | Oil & Gas Property | Feb 2025 |
| 4298 | SO UTE | La Plata County, CO | Gas Property | Feb 2025 |
| 4299 | SO UTE | La Plata County, CO | Gas Property | Feb 2025 |
| 4300 | SO UTE | La Plata County, CO | Gas Property | Feb 2025 |