| 140901 | ZORRO | McKenzie County, ND | Oil & Gas Property | Feb 2026 |
| 140902 | ZORRO | Washington County, PA | Gas Property | Feb 2026 |
| 140903 | ZORRO 16 | Major County, OK | Oil & Gas Property | Apr 2020 |
| 140904 | ZOS 1-26-35XH | Custer County, OK | Oil & Gas Property | Jan 2026 |
| 140905 | ZPZ 34-196 WRD UNIT | Ward County, TX | Oil & Gas Property | Feb 2026 |
| 140906 | ZPZ 34-211 UNIT | Ward County, TX | Oil & Gas Property | Feb 2026 |
| 140907 | ZPZ FEE | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 140908 | ZPZ FEE 10 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 140909 | ZPZ FEE 5406 | Upton County, TX | Oil & Gas Property | Feb 2026 |
| 140910 | ZR UNIT | McMullen County, TX | Oil & Gas Property | Feb 2026 |
| 140911 | ZRZAVY UNIT | Frio County, TX | Oil & Gas Property | Feb 2026 |
| 140912 | ZSCHECH C UNIT | Burleson County, TX | Oil Property | Jan 2026 |
| 140913 | ZSCHECH UNIT | Lee County, TX | Oil & Gas Property | Jan 2026 |
| 140914 | ZUBER | Jack County, TX | Oil & Gas Property | Feb 2026 |
| 140915 | ZUCINNI CS FED | Campbell County, WY | Gas Property | Feb 2012 |
| 140916 | ZUCK S.V. STATE A2796 | Webb County, TX | Oil & Gas Property | Feb 2026 |
| 140917 | ZUCKERMAN | San Joaquin County, CA | Gas Property | Mar 1990 |
| 140918 | ZUEB | Gray County, TX | Oil & Gas Property | Feb 2026 |
| 140919 | ZUEGE | Yuma County, CO | Gas Property | Jan 2026 |
| 140920 | ZUEHLKE UNIT | Fayette County, TX | Oil & Gas Property | Feb 2026 |
| 140921 | ZUERCHER | Edwards County, KS | Oil & Gas Property | Dec 2025 |
| 140922 | ZUERCHER | Edwards County, KS | Oil & Gas Property | Dec 2025 |
| 140923 | ZUGG | Pawnee County, KS | Oil & Gas Property | Nov 2025 |
| 140924 | ZUIDERVEEN | Missaukee County, MI | Oil & Gas Property | Jan 2026 |
| 140925 | ZULA 1 | Howard County, TX | Oil & Gas Property | Jan 2026 |
| 140926 | ZULA 18 | Roger Mills County, OK | Oil & Gas Property | Jan 2026 |
| 140927 | ZULCH, SALLY | Madison County, TX | Oil & Gas Property | Jan 2026 |
| 140928 | ZULETTE | Reagan County, TX | Oil & Gas Property | Jan 2026 |
| 140929 | ZULU | Mountrail County, ND | Oil & Gas Property | Feb 2026 |
| 140930 | ZUM 28-13-7 | Canadian County, OK | Oil & Gas Property | Feb 2026 |
| 140931 | ZUM MALLEN | Canadian County, OK | Oil & Gas Property | Feb 2021 |
| 140932 | ZUM MALLEN 1307 | Canadian County, OK | Oil & Gas Property | Jan 2026 |
| 140933 | ZUMA 3 | Loving County, TX | Oil & Gas Property | Feb 2026 |
| 140934 | ZUMA 57-T1-3X10 | Loving County, TX | Oil & Gas Property | Feb 2026 |
| 140935 | ZUMBACH UNIT | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 140936 | ZUMBRO | Franklin County, MS | Oil & Gas Property | Jul 2021 |
| 140937 | ZUMMALLEN | Kingfisher County, OK | Oil & Gas Property | Jan 2026 |
| 140938 | ZUMPETTA, LAWRENCE ET AL ZMBG | Wetzel County, WV | Oil & Gas Property | Dec 2021 |
| 140939 | ZUMWALT | Colusa County, CA | Gas Property | Mar 2026 |
| 140940 | ZUMWALT | Stephens County, OK | Oil & Gas Property | Jan 2026 |
| 140941 | ZUMWALT | Colusa County, CA | Gas Property | Jul 2005 |
| 140942 | ZUMWALT | Colusa County, CA | Gas Property | Jun 1988 |
| 140943 | ZUMWALT | Glenn County, CA | Gas Property | Sep 2009 |
| 140944 | ZUMWALT | Glenn County, CA | Gas Property | Sep 1988 |
| 140945 | ZUPSIC | Allegheny County, PA | Gas Property | Dec 2025 |
| 140946 | ZURBRUGG | Columbiana County, OH | Oil & Gas Property | Dec 2024 |
| 140947 | ZURICH | Seminole County, OK | Oil & Gas Property | Jan 2026 |
| 140948 | ZURICH TOWNSITE | Rooks County, KS | Oil Property | Aug 1999 |
| 140949 | ZUTZ 5693 44-12T | Mountrail County, ND | Oil & Gas Property | Feb 2026 |
| 140950 | ZVOLANEK | Ellsworth County, KS | Oil Property | Nov 2025 |
| 140951 | ZWAHLEN | Muskingum County, OH | Oil & Gas Property | Dec 2025 |
| 140952 | ZWEIG | Gray County, TX | Gas Property | Apr 2004 |
| 140953 | ZWENKE 34-11H | Dunn County, ND | Oil & Gas Property | Feb 2026 |
| 140954 | ZWERNEMANN | Jim Wells County, TX | Oil & Gas Property | Sep 2025 |
| 140955 | ZWEYGARDT | Cheyenne County, KS | Oil & Gas Property | Dec 2025 |
| 140956 | ZWEYGARDT | Cheyenne County, KS | Gas Property | Dec 2025 |
| 140957 | ZWEYGARDT | Cheyenne County, KS | Gas Property | Dec 2025 |
| 140958 | ZWICK | Rice County, KS | Oil Property | Nov 2025 |
| 140959 | ZWILLICH | Ellsworth County, KS | Oil Property | Dec 2025 |
| 140960 | ZWIRN | Yuma County, CO | Gas Property | Jan 2026 |
| 140961 | ZWIRN | Yuma County, CO | Gas Property | Jan 2026 |
| 140962 | ZYBACH | Wheeler County, TX | Oil & Gas Property | Feb 2026 |
| 140963 | ZYBACH | Wheeler County, TX | Oil & Gas Property | Feb 2026 |
| 140964 | ZYBACH 6 | Wheeler County, TX | Oil & Gas Property | Feb 2025 |
| 140965 | ZYBACH-T | Wheeler County, TX | Oil & Gas Property | Feb 2026 |
| 140966 | ZYSK FEDERAL 1-A | Campbell County, WY | Oil & Gas Property | Feb 2026 |
| 140967 | [14744] CASTLE BLACK 6 1 B2CD FEDERAL CO | Lea County, NM | Oil & Gas Property | Feb 2026 |
| 140968 | `IDEWATER OIL CO. FEE | Liberty County, TX | Oil & Gas Property | Jul 2025 |