| 901 | AFTON 12-16H | Adams County, CO | Oil & Gas Property | Mar 2019 |
| 902 | AFTON COMMUNITY | Glenn County, CA | Gas Property | May 1995 |
| 903 | AFTON SH | Indiana County, PA | Gas Property | Dec 2018 |
| 904 | AFWDU | Leon County, TX | Oil & Gas Property | Mar 2019 |
| 905 | AG 32 | Weld County, CO | Oil & Gas Property | Mar 2019 |
| 906 | AG 5N-31A-L | Weld County, CO | Oil & Gas Property | Mar 2019 |
| 907 | AG OIL | Lasalle Parish, LA | Oil Property | Sep 2018 |
| 908 | AG SPARKS | La Plata County, CO | Gas Property | Mar 2019 |
| 909 | AG STATE | Weld County, CO | Oil & Gas Property | Mar 2019 |
| 910 | AGAPE | Tarrant County, TX | Gas Property | Mar 2019 |
| 911 | AGARITTA | Concho County, TX | Oil & Gas Property | Feb 2019 |
| 912 | AGASSIZ, MABEL S | Martin County, KY | Gas Property | Dec 2015 |
| 913 | AGASTI 27 FEDERAL | Eddy County, NM | Oil & Gas Property | Jan 2019 |
| 914 | AGATE | Sherman County, TX | Gas Property | Mar 2019 |
| 915 | AGATE 1 | Reeves County, TX | Oil & Gas Property | Mar 2019 |
| 916 | AGATE PWU 21 | Eddy County, NM | Oil & Gas Property | Jan 2019 |
| 917 | AGATHA | Roberts County, TX | Gas Property | Mar 2019 |
| 918 | AGAVE 149-93 06C-4H TF | Dunn County, ND | Oil & Gas Property | Apr 2019 |
| 919 | AGAVE AAJ STATE | Eddy County, NM | Oil & Gas Property | Jan 2019 |
| 920 | AGEE | Montague County, TX | Oil & Gas Property | Mar 2019 |
| 921 | AGEE J. N. WATERFLOOD UNIT | Montague County, TX | Oil & Gas Property | Jan 2019 |
| 922 | AGEE, LEWIS | Clinton County, KY | Oil Property | Nov 2014 |
| 923 | AGEE, ROBERT | Pike County, KY | Gas Property | Dec 2015 |
| 924 | AGEMA 1-2 | Missaukee County, MI | Oil Property | Apr 2018 |
| 925 | AGEN STATE | Toole County, MT | Oil Property | Mar 2019 |
| 926 | AGF RANCH | Denton County, TX | Gas Property | Mar 2019 |
| 927 | AGFC 10-16 | Van Buren County, AR | Gas Property | Mar 2019 |
| 928 | AGGIE | Weston County, WY | Oil & Gas Property | Apr 2019 |
| 929 | AGGIE | Hughes County, OK | Gas Property | Mar 2019 |
| 930 | AGGIE 542 | Yoakum County, TX | Oil Property | Mar 2019 |
| 931 | AGGIE STATE 32 | San Juan County, NM | Oil & Gas Property | Jan 2019 |
| 932 | AGGIE STATE AA17-6 | Weld County, CO | Oil & Gas Property | Feb 2019 |
| 933 | AGGIE UNIT 75-67-66 | Loving County, TX | Oil & Gas Property | Mar 2019 |
| 934 | AGGREGATE | Weld County, CO | Oil & Gas Property | Mar 2019 |
| 935 | AGHORN AB FEE | Ector County, TX | Oil & Gas Property | Feb 2019 |
| 936 | AGLE | Erie County, NY | Gas Property | Dec 2017 |
| 937 | AGNELL | Stephens County, TX | Oil & Gas Property | Mar 2019 |
| 938 | AGNELL W.A | Eastland County, TX | Gas Property | Mar 2019 |
| 939 | AGNES | Pittsburg County, OK | Gas Property | Mar 2019 |
| 940 | AGNES | Reeves County, TX | Oil & Gas Property | Dec 2018 |
| 941 | AGNES 1 | Blaine County, OK | Gas Property | Feb 2004 |
| 942 | AGNES 1-22H | Divide County, ND | Oil & Gas Property | Apr 2019 |
| 943 | AGNES 80 | Hemphill County, TX | Gas Property | Mar 2019 |
| 944 | AGNES BROWN | Meigs County, OH | Gas Property | Dec 2016 |
| 945 | AGNES BURIAN 1-15-3A | Billings County, ND | Oil & Gas Property | Apr 2019 |
| 946 | AGNES JESKE | Young County, TX | Oil Property | Mar 2019 |
| 947 | AGNES TANTLINGER | Westmoreland County, PA | Gas Property | Dec 2018 |
| 948 | AGNES WEST | Victoria County, TX | Oil & Gas Property | Dec 2018 |
| 949 | AGNEW | Eastland County, TX | Oil & Gas Property | Mar 2017 |
| 950 | AGNEW | Crawford County, PA | Oil & Gas Property | Dec 2018 |
| 951 | AGNEW | Eastland County, TX | Oil & Gas Property | Mar 2019 |
| 952 | AGNOR | Harrison County, TX | Gas Property | Mar 2019 |
| 953 | AGOSTINELLI MASE | Clinton County, PA | Gas Property | Dec 2018 |
| 954 | AGRIBANK 157-101-34C-27-1H | Williams County, ND | Oil & Gas Property | Apr 2019 |
| 955 | AGRICULTURAL PROD | Weld County, CO | Oil & Gas Property | Feb 2019 |
| 956 | AGRICULTURAL PROD | Weld County, CO | Oil & Gas Property | Mar 2017 |
| 957 | AGRO-DYNAMICS | Liberty County, TX | Gas Property | May 2014 |
| 958 | AGUILAR | Bexar County, TX | Oil & Gas Property | Mar 2019 |
| 959 | AGUIRRE | Palo Pinto County, TX | Oil & Gas Property | Mar 2019 |
| 960 | AGUIRRE 20 | Ventura County, CA | Oil & Gas Property | Feb 2018 |
| 961 | AGUIRRE, L | Atascosa County, TX | Oil & Gas Property | Oct 2018 |
| 962 | AGURS | Caddo Parish, LA | Oil & Gas Property | Sep 2018 |
| 963 | AGURS | Panola County, TX | Oil & Gas Property | Mar 2019 |
| 964 | AHC-RDR CARTER GAS UNIT | Solano County, CA | Oil & Gas Property | Oct 2003 |
| 965 | AHEARN | Loving County, TX | Oil & Gas Property | Mar 2019 |
| 966 | AHERN 34-19H | Dunn County, ND | Oil & Gas Property | Apr 2019 |
| 967 | AHERN, MARY O. ET AL | Cass County, TX | Gas Property | May 2015 |
| 968 | AHLDEN | Kingfisher County, OK | Gas Property | Dec 2015 |
| 969 | AHLHORN NAJVAR UNIT | Gonzales County, TX | Oil & Gas Property | Mar 2019 |
| 970 | AHLSCHWEDE | Cheyenne County, NE | Oil Property | Dec 2018 |
| 971 | AHLSTROM UNIT | Karnes County, TX | Oil & Gas Property | Mar 2019 |
| 972 | AHOUSE HE | Doddridge County, WV | Oil Property | Feb 2017 |
| 973 | AHRENS | Archer County, TX | Oil & Gas Property | Oct 2016 |
| 974 | AHRENS | Venango County, PA | Oil Property | Dec 2018 |
| 975 | AHRENS STANLEY | Guadalupe County, TX | Oil & Gas Property | Jan 2019 |
| 976 | AHRENS UNIT | Atascosa County, TX | Oil & Gas Property | Mar 2019 |
| 977 | AID 24 | Eddy County, NM | Oil & Gas Property | Dec 2018 |
| 978 | AID STATE | Eddy County, NM | Oil & Gas Property | Jan 2019 |
| 979 | AIDEN 3 | McKenzie County, ND | Oil & Gas Property | Apr 2019 |
| 980 | AIELLO | Elk County, PA | Oil & Gas Property | Dec 2018 |
| 981 | AIGNER | Noble County, OK | Oil & Gas Property | Nov 1990 |
| 982 | AIKEN | Fisher County, TX | Oil & Gas Property | Mar 2019 |
| 983 | AIKEN EDWIN | Fisher County, TX | Oil & Gas Property | Mar 2019 |
| 984 | AIKEN I | McKean County, PA | Oil & Gas Property | Dec 2018 |
| 985 | AIKENS | Bradford County, PA | Gas Property | Mar 2019 |
| 986 | AIKENS 5 | Westmoreland County, PA | Gas Property | Apr 2019 |
| 987 | AIKENS 5 AIKENS5 | Westmoreland County, PA | Gas Property | Apr 2019 |
| 988 | AIKMAN BDK STATE COM | Chaves County, NM | Gas Property | Jan 2019 |
| 989 | AIKMAN STATE COM | Chaves County, NM | Oil & Gas Property | Jan 2019 |
| 990 | AIMONETTO | Weston County, WY | Oil Property | Apr 2019 |
| 991 | AINSLIE | Calhoun County, MI | Oil & Gas Property | Aug 2017 |
| 992 | AINSWORTH | Scurry County, TX | Oil & Gas Property | Mar 2019 |
| 993 | AINSWORTH | Cochran County, TX | Oil & Gas Property | Feb 2019 |
| 994 | AINSWORTH | Big Horn County, WY | Oil & Gas Property | Apr 2019 |
| 995 | AINSWORTH | Cochran County, TX | Gas Property | Mar 2019 |
| 996 | AINSWORTH | Simpson County, MS | Oil & Gas Property | Feb 1995 |
| 997 | AINSWORTH | Scurry County, TX | Oil & Gas Property | Mar 2019 |
| 998 | AINSWORTH | Lea County, NM | Oil & Gas Property | Dec 2018 |
| 999 | AIRACUDA FEDERAL | Lea County, NM | Oil & Gas Property | Jan 2019 |
| 1000 | AIRBONITA 12 FEDERAL | Lea County, NM | Oil & Gas Property | Jan 2019 |