| 1 | B & T Operating Co. | Dawson, TX 76639 | Oil & Gas Operator | Apr 2024 |
| 2 | Barnett Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 3 | Barrow-Shaver Resources Co. | Tyler, TX 75703 | Oil & Gas Operator | Apr 2024 |
| 4 | Basa Resources Inc | Dallas, TX 75254 | Oil & Gas Operator | Apr 2024 |
| 5 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Apr 2024 |
| 6 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 7 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 8 | Beehive Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 9 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 10 | Big Run Production Company | Tyler, TX 75701 | Oil & Gas Operator | Apr 2024 |
| 11 | Black Gold Energy LLC | Monroe, LA 71207 | Oil Operator | Aug 2023 |
| 12 | Boni Oil Incorporated | Nacogdoches, TX 75961 | Oil & Gas Operator | Apr 2024 |
| 13 | Booher Engineering, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Apr 2024 |
| 14 | Bowles Energy, Inc. | Longview, TX 75601 | Oil & Gas Operator | Apr 2024 |
| 15 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jan 2024 |
| 16 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 17 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2024 |
| 18 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2024 |
| 19 | Brandon Energy, Inc. | Bullard, TX 75757 | Oil & Gas Operator | Nov 2007 |
| 20 | Brangus Energy LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 21 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2024 |
| 22 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2024 |
| 23 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 24 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2023 |
| 25 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 26 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 27 | Buckhorn Oilfield Service Inc | Kilgore, TX 75663 | Oil Operator | Apr 2024 |
| 28 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2024 |
| 29 | Bull Oil Company, LLC | Livingston, TX 77351 | Oil & Gas Operator | Apr 2024 |
| 30 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 31 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |