| 901 | Barnes, Larry Petroleum, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Jul 1996 |
| 902 | Barnett Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Mar 2025 |
| 903 | Barnett Oil Investments, Inc. | Hobbs, NM 88240 | Oil & Gas Operator | Mar 1999 |
| 904 | Barnett Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 1999 |
| 905 | Barnett, G. | Graham, TX 76450 | Oil Operator | Mar 2025 |
| 906 | Barnhart Co LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 907 | Barnhart Co. | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 908 | Barnhill, Monte | Muenster, TX 76252 | Oil Operator | Mar 2025 |
| 909 | Baron Energy Inc. | San Marcos, TX 78666 | Oil & Gas Operator | Mar 2025 |
| 910 | Baron Energy LTD. | Midland, TX 79702 | Oil & Gas Operator | Oct 2005 |
| 911 | Baron Exploration Company | Edmond, OK 73034 | Oil & Gas Operator | Mar 2025 |
| 912 | Barrett Brothers Oil & Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2020 |
| 913 | Barrett Brothers Oil And Gas | San Antonio, TX 78217 | Oil & Gas Operator | Mar 1995 |
| 914 | Barrett Oil Co. | White Oak, TX 75693 | Oil & Gas Operator | Jan 2022 |
| 915 | Barrett Resources Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 916 | Barrier Resources,L.L.C. | Cedar Park, TX 78613 | Oil & Gas Operator | Aug 2003 |
| 917 | Barron Operating LLC | Midland, TX 79703 | Oil & Gas Operator | Jun 2011 |
| 918 | Barron Petroleum LLC | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2025 |
| 919 | Barrow Petroleum LLC | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 920 | Barrow-Shaver Resources Co. | Tyler, TX 75703 | Oil & Gas Operator | Mar 2025 |
| 921 | Barry Rock Oil Co. Inc. | Plain Dealing, LA 71064 | Oil & Gas Operator | Dec 2024 |
| 922 | Bartex Energy Corporation | Irving, TX 75060 | Oil & Gas Operator | Apr 1994 |
| 923 | Barton Oil Co. | Baird, TX 79504 | Oil Operator | Jun 2004 |
| 924 | Barton, Howard | Archer City, TX 76351 | Gas Operator | Mar 2025 |
| 925 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Mar 2025 |
| 926 | Basal Corporation | Cleburne, TX 76033 | Oil & Gas Operator | Mar 2025 |
| 927 | Base Petroleum | Houston, TX 77096 | Oil & Gas Operator | Jul 1994 |
| 928 | Baseline Oil & Gas Corp. | Houston, TX 77267 | Oil & Gas Operator | Oct 2010 |
| 929 | Basic Earth Science Systems, Inc. | Austin, TX 78714 | Oil & Gas Operator | Apr 2010 |
| 930 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Mar 2025 |
| 931 | Basin Oil & Gas Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2025 |
| 932 | Basin Operating Inc. | Albany, TX 76430 | Oil & Gas Operator | Mar 2025 |
| 933 | Basin Well Service Of Odessa,Inc | Odessa, TX 79768 | Oil & Gas Operator | Mar 2025 |
| 934 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 935 | Bass Operating Co., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 1999 |
| 936 | Bass Petroleum | Austin, TX 78720 | Oil & Gas Operator | Aug 2004 |
| 937 | Bass Petroleum Inc | Austin, TX 78716 | Oil & Gas Operator | Mar 2025 |
| 938 | Bastrop Energy Group | San Antonio, TX 78231 | Oil & Gas Operator | Mar 2025 |
| 939 | Bataa Oil Inc | Greeley, CO 80634 | Oil & Gas Operator | Jan 2025 |
| 940 | Bateman'S Bay Exploration, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Dec 2024 |
| 941 | Batie, Patricia | Odessa, TX 79764 | Oil Operator | Nov 2024 |
| 942 | Batson Ent Ventures L.L.C. | Batson, TX 77519 | Oil Operator | Mar 2025 |
| 943 | Battlecat Oil & Gas, LLC | Houston, TX 77082 | Oil & Gas Operator | Jul 2017 |
| 944 | Battlecat Operating Company, LLC | Houston, TX 77082 | Oil & Gas Operator | Jul 2019 |
| 945 | Batton Oil & Gas, LLC | Spearman, TX 79081 | Oil & Gas Operator | Mar 2025 |
| 946 | Baxter Casing Pullers, Inc. | Midland, TX 79703 | Gas Operator | Mar 2025 |
| 947 | Baxter, D. B. Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2025 |
| 948 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 949 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 950 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 951 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2025 |
| 952 | Bay Tan Operating, LP | Odessa, TX 79765 | Oil & Gas Operator | Mar 2025 |
| 953 | Bay-Tech Operating Co., Inc. | Tyler, TX 75713 | Oil & Gas Operator | Mar 2024 |
| 954 | Bayer, Arthur | Muenster, TX 76252 | Oil & Gas Operator | Nov 2016 |
| 955 | Bayer, J.H. & Sons Inc | Gainesville, TX 76240 | Oil & Gas Operator | Mar 2008 |
| 956 | Baylor Operating, LLC | Austin, TX 78766 | Oil & Gas Operator | Mar 2025 |
| 957 | Bayou Bend Petroleum Corporation | Austin, TX 78734 | Oil & Gas Operator | Sep 2006 |
| 958 | Bayou Company, The | Refugio, TX 78377 | Oil & Gas Operator | Mar 2025 |
| 959 | Bayou Oil Co. | Los Angeles, CA 90036 | Gas Operator | Nov 1996 |
| 960 | Bayou Operating Company, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2025 |
| 961 | Bayridge Texas Corp. | Big Spring, TX 79720 | Oil & Gas Operator | Jul 2004 |
| 962 | Bayshore Exploration LLC | Bellville, TX 77418 | Oil & Gas Operator | Dec 2016 |
| 963 | Bayshore Operating Co. | Ingleside, TX 78362 | Oil & Gas Operator | Mar 2009 |
| 964 | Bayshore Operating Corp., L.L.C. | Luling, TX 78648 | Oil Operator | Mar 2025 |
| 965 | Bayswater Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 966 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 967 | Baytex Energy USA, Inc. | Houston, TX 77084 | Oil & Gas Operator | Mar 2025 |
| 968 | Baytex USA Development, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2017 |
| 969 | Baytide Petr. Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 1997 |
| 970 | BB & D Exploration, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jan 2009 |
| 971 | BB-Southtex, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2024 |
| 972 | BBC Production Company Inc. | Pottstown, PA 19464 | Oil Operator | Mar 2025 |
| 973 | BBC&D Enterprises, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2024 |
| 974 | Bbe Production Co. | Haskell, TX 79521 | Oil & Gas Operator | May 1997 |
| 975 | Bbe Production, LLC | Haskell, TX 79521 | Oil Operator | Mar 2025 |
| 976 | BBHP Oilfield Services LLC | Kilgore, TX 75662 | Oil Operator | Mar 2025 |
| 977 | BBL Operating Company LLC | Colleyville, TX 76034 | Oil & Gas Operator | Mar 2025 |
| 978 | BBS Oil Field Services Inc | Post, TX 79356 | Oil & Gas Operator | Mar 2025 |
| 979 | BBX Operating, L.L.C. | Austin, TX 78738 | Oil & Gas Operator | Mar 2025 |
| 980 | BC Exploration, LLC | Dallas, TX 75201 | Gas Operator | Mar 2025 |
| 981 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 982 | Bce-Mach II LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 983 | Bce-Mach III LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |
| 984 | BCL Operating, LLC | Houston, TX 77269 | Oil & Gas Operator | Mar 2025 |
| 985 | BCM Energy Operating LLC | Lafayette, LA 70503 | Oil Operator | Jun 2015 |
| 986 | BCP Resources, LLC | Midland, TX 79705 | Oil & Gas Operator | Mar 2025 |
| 987 | Bde Energy Solutions LLC | Bedford, TX 76021 | Oil Operator | Mar 2025 |
| 988 | BDH Technology, Inc. | Conroe, TX 77304 | Oil & Gas Operator | Mar 2001 |
| 989 | Bdi Operating, LLC | Addison, TX 75001 | Oil Operator | Mar 2025 |
| 990 | BDR Energy Corporation | Corpus Chrsti, TX 78463 | Oil & Gas Operator | Mar 1998 |
| 991 | Be Anadarko II, LLC | Austin, TX 78731 | Oil & Gas Operator | Mar 2025 |
| 992 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 993 | Beach Oil & Gas, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Mar 2025 |
| 994 | Beachtex Oil Company, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Mar 2025 |
| 995 | Beacon E&P Company, LLC | Denver, CO 80202 | Gas Operator | Feb 2016 |
| 996 | Beacon Energy Corporation (1) | Fredericksbrg, TX 78624 | Gas Operator | Sep 2002 |
| 997 | Beacon Petroleum MGMT.,Inc. | Dallas, TX 75244 | Oil & Gas Operator | Oct 2014 |
| 998 | Beaird, R.A. Oil Operating Co. | Merkel, TX 79536 | Oil & Gas Operator | Mar 2025 |
| 999 | Bean & Bean Inc. | Houston, TX 77269 | Oil & Gas Operator | Jan 2023 |
| 1000 | Bear Creek Energy, LLC | Sealy, TX 77474 | Oil Operator | Mar 2025 |