| 601 | STREETER | Johnson County, WY | Gas Property | Feb 2016 |
| 602 | STREETER | Johnson County, WY | Oil & Gas Property | Dec 1993 |
| 603 | STREETER FED | Johnson County, WY | Gas Property | Nov 2015 |
| 604 | STRICKLING | Weston County, WY | Oil & Gas Property | Aug 2024 |
| 605 | STRIKE | Sweetwater County, WY | Oil & Gas Property | Oct 2024 |
| 606 | STRIPE CS FED | Campbell County, WY | Gas Property | Feb 2012 |
| 607 | STUART | Campbell County, WY | Gas Property | Aug 2011 |
| 608 | STUART | Campbell County, WY | Oil & Gas Property | Oct 2024 |
| 609 | STUART | Campbell County, WY | Oil & Gas Property | Oct 2024 |
| 610 | STUART FEDERAL | Campbell County, WY | Gas Property | Jun 2012 |
| 611 | STUART FEDERAL | Campbell County, WY | Gas Property | Jul 2011 |
| 612 | STUART FEDERAL | Campbell County, WY | Gas Property | Jan 2010 |
| 613 | STUD HORSE | Sublette County, WY | Oil & Gas Property | Oct 2024 |
| 614 | STUD HORSE BUTTE | Sublette County, WY | Oil & Gas Property | Oct 2024 |
| 615 | STUDHORSE BUTTE RAIN 311-04-500H | Sublette County, WY | Oil & Gas Property | Oct 2024 |
| 616 | SUBTHRUST C | Hot Springs County, WY | Oil & Gas Property | Oct 2024 |
| 617 | SUCHAN | Campbell County, WY | Oil & Gas Property | Oct 2024 |
| 618 | SUEDKAMP | Campbell County, WY | Gas Property | May 2012 |
| 619 | SUGAR LOAF | Sublette County, WY | Oil & Gas Property | Nov 2021 |
| 620 | SUGARLOAF | Sweetwater County, WY | Oil & Gas Property | Aug 2017 |
| 621 | SUKEY CS STATE | Johnson County, WY | Gas Property | Apr 2014 |
| 622 | SULTANA 23-62 23-14 | Goshen County, WY | Oil & Gas Property | Nov 2024 |
| 623 | SUMMERFIELD | Campbell County, WY | Oil & Gas Property | Dec 2022 |
| 624 | SUN DOG UNIT | Carbon County, WY | Gas Property | Oct 2024 |
| 625 | SUN DOG UNIT 1691 | Carbon County, WY | Gas Property | Dec 2016 |
| 626 | SUN RANCH | Natrona County, WY | Oil & Gas Property | Sep 2024 |
| 627 | SUNDQUIST 9-34-71 USA A | Converse County, WY | Oil & Gas Property | Nov 2024 |
| 628 | SUNDQUIST FLATS | Converse County, WY | Oil & Gas Property | Sep 1981 |
| 629 | SUNDQUIST FLATS UNIT 34-72 1 | Converse County, WY | Oil & Gas Property | Nov 2024 |
| 630 | SUNRISE CS FED | Campbell County, WY | Gas Property | Sep 2014 |
| 631 | SUNRISE FED | Campbell County, WY | Oil & Gas Property | Oct 2024 |
| 632 | SUPER BEE | Laramie County, WY | Oil & Gas Property | Sep 2024 |
| 633 | SUPERHORNET | Campbell County, WY | Oil Property | Apr 2010 |
| 634 | SUPERIOR | Campbell County, WY | Oil Property | Jan 1990 |
| 635 | SURANYI | Sheridan County, WY | Gas Property | May 2012 |
| 636 | SUSSEX | Johnson County, WY | Oil & Gas Property | Oct 2024 |
| 637 | SUSSEX UNIT | Johnson County, WY | Oil & Gas Property | Apr 1986 |
| 638 | SUSSEX WEST | Johnson County, WY | Oil & Gas Property | Nov 2024 |
| 639 | SUSSEX WEST UNIT | Johnson County, WY | Oil Property | Oct 1986 |
| 640 | SVALINA | Campbell County, WY | Oil & Gas Property | Apr 2010 |
| 641 | SVALINA FED 14-17 | Campbell County, WY | Oil Property | Oct 2024 |
| 642 | SWAN SOUTH | Sweetwater County, WY | Oil & Gas Property | Oct 2024 |
| 643 | SWANSON | Campbell County, WY | Gas Property | Jan 2007 |
| 644 | SWANSONG | Campbell County, WY | Gas Property | Nov 2013 |
| 645 | SWINGHOLM FEDERAL | Campbell County, WY | Gas Property | Dec 2011 |
| 646 | SWINYER 1 | Sheridan County, WY | Gas Property | Mar 2014 |
| 647 | SYMONS | Sheridan County, WY | Gas Property | Mar 2014 |