| 1 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Oct 2025 |
| 2 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 3 | B.P. Productions Inc. | Victoria, TX 77904 | Oil & Gas Operator | Oct 2025 |
| 4 | Bailey, L. J. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2003 |
| 5 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 6 | Battlecat Operating Company, LLC | Houston, TX 77082 | Oil & Gas Operator | Jul 2019 |
| 7 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 8 | Bayshore Operating Co. | Ingleside, TX 78362 | Oil & Gas Operator | Mar 2009 |
| 9 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Oct 2025 |
| 10 | Bellows, Dewey Oper. Co., LTD. | Refugio, TX 78377 | Oil & Gas Operator | Jul 2013 |
| 11 | Bellows, Richard | Three Rivers, TX 78071 | Oil & Gas Operator | Nov 2008 |
| 12 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 13 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 14 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 15 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 16 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2025 |
| 17 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 18 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 19 | BLS Resources, Inc. | Rosharon, TX 77583 | Oil & Gas Operator | Feb 2001 |
| 20 | Blue Wing Energy, Inc. | Portland, TX 78374 | Oil & Gas Operator | Oct 2025 |
| 21 | Bluebonnet Oil & Gas | Three Rivers, TX 78071 | Oil & Gas Operator | Oct 2025 |
| 22 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 23 | Bluestone Natural Resources, LLC | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2015 |
| 24 | Bluestone Production Company LP | Tulsa, OK 74105 | Oil & Gas Operator | Jun 2007 |
| 25 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Oct 2025 |
| 26 | Borden, Inc. | Columbus, OH 43215 | Oil & Gas Operator | May 1990 |
| 27 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 28 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 29 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 30 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 31 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 32 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 33 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | Oct 2025 |
| 34 | Broad Oak Energy, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Jul 2011 |
| 35 | Brown, Russell Operator, Inc. | Alice, TX 78333 | Oil & Gas Operator | Oct 2025 |
| 36 | Brush Country Energy, L.L.C. | Reno, NV 89503 | Oil & Gas Operator | Nov 1998 |
| 37 | Brymer Contracting Incorporated | Pleasanton, TX 78064 | Oil & Gas Operator | Oct 2025 |
| 38 | Buffalo Oil Corp. | Cotulla, TX 78014 | Oil & Gas Operator | Oct 2025 |
| 39 | Bull Oil Company, LLC | Livingston, TX 77351 | Oil & Gas Operator | Oct 2025 |
| 40 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 41 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 42 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |