| 1 | Bachtell Oil & Gas, LTD. | Longview, TX 75605 | Oil & Gas Operator | Oct 2025 |
| 2 | Backus & Lanford | | Oil Operator | Aug 1985 |
| 3 | Barco Co. | | Oil & Gas Operator | Dec 2000 |
| 4 | Barry Rock Oil Co. Inc. | Plain Dealing, LA 71064 | Oil & Gas Operator | Dec 2024 |
| 5 | Bayou Production Company, Inc. | | Oil & Gas Operator | Apr 1993 |
| 6 | Bayou South Gas Gather. Co L C | | Oil Operator | Oct 2002 |
| 7 | Bayou State Oil Corporation | | Oil & Gas Operator | Dec 2024 |
| 8 | BCF Operating, LLC | | Oil & Gas Operator | Nov 2024 |
| 9 | Berkshire Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 10 | Betsy Production Company, Inc. | Magnolia, AR 71753 | Oil & Gas Operator | Jul 2025 |
| 11 | BHP Billiton Petro (KCS Resources), LLC | | Oil & Gas Operator | Jul 2019 |
| 12 | BHP Billiton Petro (Txla Operating) Co. | | Gas Operator | Jul 2019 |
| 13 | BHP Billiton Petro (WSF Operating), Inc. | | Oil & Gas Operator | Jul 2019 |
| 14 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 15 | Big Pine Petroleum Inc. | | Oil & Gas Operator | Dec 2024 |
| 16 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 17 | Bob Sibley | | Oil & Gas Operator | Jan 2025 |
| 18 | Bodcaw Company | | Oil & Gas Operator | Oct 1979 |
| 19 | Bolinger Oil L.L.C. | | Oil Operator | Dec 2024 |
| 20 | Bomar Oil & Gas, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2020 |
| 21 | BPX (KCS Resources), LLC | | Oil & Gas Operator | Feb 2022 |
| 22 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 23 | Brammer-Keystone Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 24 | Branch Investment Corporation | | Oil & Gas Operator | Jan 2025 |
| 25 | Broad Oak Energy, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Jul 2011 |
| 26 | Broad Street Financial Co. | | Oil & Gas Operator | Nov 1998 |
| 27 | Bruxoil Inc | | Oil & Gas Operator | Jun 2025 |
| 28 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Oct 2025 |