| 601 | STUART FEDERAL | Campbell County, WY | Gas Property | Jan 2010 |
| 602 | STUD HORSE | Sublette County, WY | Oil & Gas Property | Feb 2024 |
| 603 | STUD HORSE BUTTE | Sublette County, WY | Oil & Gas Property | Feb 2024 |
| 604 | STUDHORSE BUTTE RAIN 311-04-500H | Sublette County, WY | Oil & Gas Property | Feb 2024 |
| 605 | SUCHAN | Campbell County, WY | Oil & Gas Property | Feb 2024 |
| 606 | SUEDKAMP | Campbell County, WY | Gas Property | May 2012 |
| 607 | SUGAR LOAF | Sublette County, WY | Oil & Gas Property | Nov 2021 |
| 608 | SUGARLOAF | Sweetwater County, WY | Oil & Gas Property | Aug 2017 |
| 609 | SUKEY CS STATE | Johnson County, WY | Gas Property | Apr 2014 |
| 610 | SULTANA 23-62 23-14 | Goshen County, WY | Oil & Gas Property | Mar 2024 |
| 611 | SUMMERFIELD | Campbell County, WY | Oil & Gas Property | Dec 2022 |
| 612 | SUN DOG UNIT | Carbon County, WY | Gas Property | Feb 2024 |
| 613 | SUN DOG UNIT 1691 | Carbon County, WY | Gas Property | Oct 2016 |
| 614 | SUN RANCH | Natrona County, WY | Oil & Gas Property | Feb 2024 |
| 615 | SUNDQUIST 9-34-71 USA A | Converse County, WY | Oil & Gas Property | Feb 2024 |
| 616 | SUNDQUIST FLATS | Converse County, WY | Oil & Gas Property | Sep 1981 |
| 617 | SUNDQUIST FLATS UNIT 34-72 1 | Converse County, WY | Oil & Gas Property | Feb 2024 |
| 618 | SUNLIGHT 41-20 1H | Laramie County, WY | Oil & Gas Property | Feb 2024 |
| 619 | SUNRISE CS FED | Campbell County, WY | Gas Property | Sep 2014 |
| 620 | SUNRISE FED | Campbell County, WY | Oil & Gas Property | Feb 2024 |
| 621 | SUPER BEE | Laramie County, WY | Oil & Gas Property | Jan 2024 |
| 622 | SUPERHORNET | Campbell County, WY | Oil Property | Apr 2010 |
| 623 | SUPERIOR | Campbell County, WY | Oil Property | Jan 1990 |
| 624 | SURANYI | Sheridan County, WY | Gas Property | May 2012 |
| 625 | SUSSEX | Johnson County, WY | Oil & Gas Property | Mar 2024 |
| 626 | SUSSEX UNIT | Johnson County, WY | Oil & Gas Property | Apr 1986 |
| 627 | SUSSEX WEST | Johnson County, WY | Oil & Gas Property | Mar 2024 |
| 628 | SUSSEX WEST UNIT | Johnson County, WY | Oil Property | Oct 1986 |
| 629 | SVALINA | Campbell County, WY | Oil & Gas Property | Apr 2010 |
| 630 | SVALINA FED 14-17 | Campbell County, WY | Oil Property | Feb 2024 |
| 631 | SWAN SOUTH | Sweetwater County, WY | Oil & Gas Property | Feb 2024 |
| 632 | SWANSON | Campbell County, WY | Gas Property | Dec 2006 |
| 633 | SWANSONG | Campbell County, WY | Gas Property | Nov 2013 |
| 634 | SWINGHOLM FEDERAL | Campbell County, WY | Gas Property | Nov 2011 |
| 635 | SWINYER 1 | Sheridan County, WY | Gas Property | Feb 2014 |
| 636 | SYMONS | Sheridan County, WY | Gas Property | Mar 2014 |