| 101 | ANTELOPE | Converse County, WY | Gas Property | Nov 2009 |
| 102 | ANTELOPE BUTTE 4174-32-29-1NH | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 103 | ANTICLINE UNIT | Big Horn County, WY | Oil & Gas Property | Sep 2025 |
| 104 | ANTLER CS FEDERAL | Campbell County, WY | Gas Property | Sep 2018 |
| 105 | ANTON | Campbell County, WY | Oil Property | Jan 2025 |
| 106 | APEX | Niobrara County, WY | Oil & Gas Property | Nov 2024 |
| 107 | APOCH CS FEDERAL | Campbell County, WY | Gas Property | Aug 2018 |
| 108 | APPALOOSA CS FED | Campbell County, WY | Gas Property | Jul 2015 |
| 109 | APPEL | Campbell County, WY | Gas Property | Nov 2007 |
| 110 | APPEL | Campbell County, WY | Oil & Gas Property | Nov 2009 |
| 111 | APPEL FEDERAL | Campbell County, WY | Gas Property | Dec 2008 |
| 112 | APPLEGATE 56-77-2 | Sheridan County, WY | Gas Property | Oct 2013 |
| 113 | APPLING ST | Weston County, WY | Oil Property | Aug 2018 |
| 114 | AR FEDERAL 1 | Carbon County, WY | Gas Property | May 2025 |
| 115 | AR FEDERAL 1 | Carbon County, WY | Gas Property | Apr 2019 |
| 116 | AR FEE 1 | Carbon County, WY | Gas Property | May 2025 |
| 117 | AR FEE 1791 | Carbon County, WY | Gas Property | May 2025 |
| 118 | ARAPAHOE 3526 | Campbell County, WY | Oil & Gas Property | Aug 2025 |
| 119 | ARBALEST | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 120 | ARBALEST | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 121 | ARCH | Campbell County, WY | Gas Property | Dec 2009 |
| 122 | ARCH COAL FED | Campbell County, WY | Gas Property | Dec 2009 |
| 123 | ARCH UNIT | Sweetwater County, WY | Oil & Gas Property | Sep 2025 |
| 124 | ARCH UNIT | Sweetwater County, WY | Oil & Gas Property | Jan 1983 |
| 125 | ARCO | Campbell County, WY | Oil & Gas Property | Jul 2025 |
| 126 | ARCOL | Crook County, WY | Oil & Gas Property | Jul 2015 |
| 127 | ARFEDERAL 1591 | Carbon County, WY | Gas Property | Apr 2019 |
| 128 | ARFEDERAL 1791 | Carbon County, WY | Gas Property | May 2025 |
| 129 | ARFEE 1791 | Carbon County, WY | Gas Property | May 2025 |
| 130 | ARGO | Niobrara County, WY | Oil & Gas Property | Aug 2025 |
| 131 | ARGOS FE | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 132 | ARIEL FED 3571-1301 | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 133 | ARIES | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 134 | ARK LAND 02-114372 | Campbell County, WY | Oil & Gas Property | Sep 2025 |
| 135 | ARK LAND FED | Campbell County, WY | Oil & Gas Property | Sep 2025 |
| 136 | ARKLAND | Campbell County, WY | Gas Property | Jan 2010 |
| 137 | ARLINE | Campbell County, WY | Gas Property | Oct 2018 |
| 138 | ARMONDO | Campbell County, WY | Gas Property | Apr 2012 |
| 139 | ARMOUR | Laramie County, WY | Oil & Gas Property | Sep 2025 |
| 140 | ARMY MULE FED 3976-2-11-1FH | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 141 | ASPEN | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 142 | ASPEN 2 | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 143 | ASPEN CREEK UNIT | Hot Springs County, WY | Oil Property | Jul 1994 |
| 144 | ATCHISON 1 | Laramie County, WY | Oil & Gas Property | Aug 2019 |
| 145 | ATHENA | Converse County, WY | Oil & Gas Property | Sep 2025 |
| 146 | ATHERLY | Park County, WY | Oil & Gas Property | Aug 2025 |
| 147 | ATKINS | Campbell County, WY | Gas Property | Mar 2004 |
| 148 | ATLAS 1-19H | Laramie County, WY | Oil & Gas Property | Aug 2025 |
| 149 | ATLAS FED 4271-32 | Campbell County, WY | Oil & Gas Property | Aug 2025 |
| 150 | ATWOOD | Campbell County, WY | Gas Property | Oct 2013 |
| 151 | ATWOOD | Campbell County, WY | Oil & Gas Property | Aug 2025 |
| 152 | ATWOOD LAUR | Campbell County, WY | Oil & Gas Property | Aug 2025 |
| 153 | AUGUSTA | Campbell County, WY | Oil & Gas Property | Aug 2025 |
| 154 | AURORA METAL | Crook County, WY | Oil Property | Dec 2001 |
| 155 | AVERY 26-14 | Campbell County, WY | Oil Property | Sep 2025 |
| 156 | AVERY DRAW | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 157 | AXEL FED 3572-1 | Converse County, WY | Oil & Gas Property | Aug 2025 |
| 158 | AXIOM FEDERAL | Johnson County, WY | Oil & Gas Property | Sep 2025 |
| 159 | AZTEC FED | Niobrara County, WY | Oil & Gas Property | Sep 2016 |
| 160 | AZTEC W-043930 | Campbell County, WY | Oil & Gas Property | Aug 2025 |