| 1 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Oct 2025 |
| 2 | B.N.B. Production | Corpus Chrsti, TX 78403 | Oil & Gas Operator | May 1993 |
| 3 | B.N.B. Production Inc. | Austin, TX 78720 | Oil & Gas Operator | May 1996 |
| 4 | B.P. Productions Inc. | Victoria, TX 77904 | Oil & Gas Operator | Oct 2025 |
| 5 | Bandera Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2017 |
| 6 | Barbee, R.L. Operating, Inc. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Oct 2025 |
| 7 | Barrett Brothers Oil And Gas | San Antonio, TX 78217 | Oil & Gas Operator | Mar 1995 |
| 8 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 9 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Oct 2025 |
| 10 | BB-Southtex, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2024 |
| 11 | Beachtex Oil Company, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Oct 2025 |
| 12 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Oct 2025 |
| 13 | Bellows, Dewey Oper. Co., LTD. | Refugio, TX 78377 | Oil & Gas Operator | Jul 2013 |
| 14 | Bennett, Mills Estate | Houston, TX 77057 | Oil & Gas Operator | Sep 1995 |
| 15 | Beta Oil Corporation | San Antonio, TX 78232 | Oil & Gas Operator | Oct 2025 |
| 16 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 17 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 18 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 19 | Billington Oil & Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 20 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | Oct 2025 |
| 21 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 22 | Blanco Oil Co. | San Antonio, TX 78230 | Oil & Gas Operator | Feb 2004 |
| 23 | Block "T" Petroleum, Inc. | Tyler, TX 75707 | Oil & Gas Operator | Oct 2025 |
| 24 | Blue Wing Energy, Inc. | Portland, TX 78374 | Oil & Gas Operator | Oct 2025 |
| 25 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Oct 2025 |
| 26 | Bodden Production | Poth, TX 78147 | Oil & Gas Operator | Oct 2025 |
| 27 | Botasch Operating, LLC | Dilley, TX 78017 | Oil & Gas Operator | Oct 2025 |
| 28 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 29 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 30 | Bralex Operating LLC | Dallas, TX 75367 | Oil & Gas Operator | Oct 2025 |
| 31 | Braman, D. H., Jr. | Victoria, TX 77901 | Oil & Gas Operator | Dec 2008 |
| 32 | Brayton Oil Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 33 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 34 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 35 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 36 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | Oct 2025 |
| 37 | Brown, Russell Operator, Inc. | Alice, TX 78333 | Oil & Gas Operator | Oct 2025 |
| 38 | Buccaneer Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 39 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 40 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 41 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 42 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 43 | Burton, V.C. Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2016 |
| 44 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Oct 2025 |