| 1 | 2 D Oil & Gas LLC | Refugio, TX 78377 | Oil & Gas Operator | Dec 2020 |
| 2 | 3-M Energy Corporation | San Angelo, TX 76902-3986 | Oil & Gas Operator | Jun 2017 |
| 3 | 324 Oil & Gas, LTD. | Goliad, TX 77963 | Oil & Gas Operator | Dec 2020 |
| 4 | 324 Ranch Oil | | Oil & Gas Operator | Jun 2004 |
| 5 | 801 LLC | Artesia, NM 88210 | Oil & Gas Operator | Oct 2020 |
| 6 | A & D Exploration Company | Rockport, TX 78381 | Oil & Gas Operator | Dec 2020 |
| 7 | A A Production Inc. | | Oil & Gas Operator | Mar 1998 |
| 8 | A T M Corporation | | Oil & Gas Operator | Oct 2002 |
| 9 | A.O.E. Operators, Inc. | Fulshear, TX 77441-550 | Oil & Gas Operator | Dec 2020 |
| 10 | Abaco Operating, LLC | San Antonio, TX 78209-1223 | Oil & Gas Operator | Dec 2020 |
| 11 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 12 | Abraxas Petroleum Corporation | San Antonio, TX 78258 | Oil & Gas Operator | Dec 2020 |
| 13 | Abraxas Production Corporation | San Antonio, TX 78209 | Oil & Gas Operator | Mar 1996 |
| 14 | Acock Engineering & Assoc., Inc. | | Oil & Gas Operator | Jul 2002 |
| 15 | Acock Operating Limited | San Antonio, TX 78270 | Oil & Gas Operator | Dec 2020 |
| 16 | Acock/Anaqua Operating Co., LC | | Oil & Gas Operator | Apr 2004 |
| 17 | Acock/Anaqua Operating Co., LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2020 |
| 18 | Advantage Oil & Gas, Inc. | Pinehurst, TX 77362-3917 | Oil & Gas Operator | Dec 2020 |
| 19 | Agape Energy Inc. | | Oil Operator | Dec 2020 |
| 20 | Alamo Operating Company, L. C. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2020 |
| 21 | Albrecht, Phil A., Jr. | | Oil & Gas Operator | Jun 2005 |
| 22 | Alcorn Prod Co. | | Oil & Gas Operator | Mar 1997 |
| 23 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2020 |
| 24 | Allegro Investments, Inc. | Victoria, TX 77903-4085 | Oil & Gas Operator | Dec 2020 |
| 25 | Alta Mesa Services, LP | Houston, TX 77084 | Oil & Gas Operator | Dec 2020 |
| 26 | Alyndson Oil & Gas Inc. | | Oil & Gas Operator | Jun 2000 |
| 27 | Amax Oil & Gas Inc. | Houston, TX BAD ADDR | Oil & Gas Operator | Mar 2009 |
| 28 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 29 | Amerac Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2000 |
| 30 | American Coastal Energy, Inc. | | Oil & Gas Operator | May 2008 |
| 31 | American Exploration Company | Houston, TX 77010-3088 | Oil & Gas Operator | Jan 2000 |
| 32 | American Int'L Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Nov 2015 |
| 33 | American Pumping & Trucking | New Braunfels, TX 78131-2580 | Oil & Gas Operator | Dec 2020 |
| 34 | American Shoreline, Inc. | Corpus Chrsti, TX 78401-19 | Oil & Gas Operator | Dec 2020 |
| 35 | Americo Energy Resources, LLC | Houston, TX 77063 | Oil & Gas Operator | Dec 2020 |
| 36 | Amoco Production Co. | Chicago, IL 60601-7125 | Oil & Gas Operator | Jun 2015 |
| 37 | Ampak Oil Company | Plano, TX 75074-6764 | Oil & Gas Operator | Dec 2020 |
| 38 | Anadarko E&P Company LP | Houston, TX 77251-1330 | Oil & Gas Operator | Oct 2014 |
| 39 | Anaqua Oil & Gas, Inc. | | Oil & Gas Operator | Mar 2008 |
| 40 | Anderson Oil Corporation | Corpus Chrsti, TX 78403-2524 | Oil & Gas Operator | Nov 1999 |
| 41 | Anderson Oil LTD. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2020 |
| 42 | Anderson, Steven C. | Victoria, TX 77902 | Gas Operator | Jun 2004 |
| 43 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Dec 2020 |
| 44 | Apex Energy, Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Dec 2020 |
| 45 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Dec 2020 |
| 46 | Aransas DRLG & Workover Co Inc | | Oil & Gas Operator | Jul 2019 |
| 47 | Aransas Resources, Inc | | Gas Operator | Dec 2005 |
| 48 | Aransas Resources, LP | Houston, TX 77094 | Gas Operator | Oct 2006 |
| 49 | Arco Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2006 |
| 50 | Armour Resource Holdings, LTD. | | Oil & Gas Operator | Nov 1994 |
| 51 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 52 | Atapco | | Oil & Gas Operator | Feb 1999 |
| 53 | Atasca Resources, Inc. | Houston, TX 77219 | Oil & Gas Operator | Dec 2020 |
| 54 | Atkinson Energy Corporation | Giddings, TX 78942 | Oil & Gas Operator | Jan 2010 |
| 55 | Atkinson, Clifford III | | Gas Operator | Dec 1996 |
| 56 | Atoka Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | Dec 2020 |
| 57 | Aurora Resources Corporation | Corpus Chrsti, TX 78401-682 | Oil & Gas Operator | Dec 2020 |
| 58 | Austin Energy Operations, Inc. | | Oil & Gas Operator | Dec 2020 |
| 59 | Averill, W. M. Inc. | | Oil & Gas Operator | Jun 2003 |
| 60 | Awp Operating Company | San Antonio, TX 78209-4551 | Oil & Gas Operator | Dec 2020 |
| 61 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Dec 2020 |
| 62 | B.N.B. Production | | Oil & Gas Operator | May 1993 |
| 63 | B.N.B. Production Inc. | | Oil & Gas Operator | May 1996 |
| 64 | B.P. Productions Inc. | Victoria, TX 77904 | Oil & Gas Operator | Dec 2020 |
| 65 | Ballard Exploration Company,Inc. | Houston, TX 77002-6602 | Oil & Gas Operator | Dec 2020 |
| 66 | Bammert, H. L. | | Gas Operator | Sep 2013 |
| 67 | Bandera Exploration Company | | Oil & Gas Operator | Jan 2017 |
| 68 | Barbee, R.L. Operating, Inc. | Corpus Chrsti, TX 78427-1091 | Oil & Gas Operator | Dec 2020 |
| 69 | Basa Resources, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Dec 2020 |
| 70 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Dec 2020 |
| 71 | Bastrop Energy Group | San Antonio, TX 78231 | Oil & Gas Operator | Dec 2020 |
| 72 | Battlecat Operating Company, LLC | Houston, TX 77082 | Oil & Gas Operator | Jul 2019 |
| 73 | Bay Rock Operating Company | San Antonio, TX 78212-468 | Oil & Gas Operator | Dec 2020 |
| 74 | Bayou Company, The | Refugio, TX 78377 | Gas Operator | Dec 2020 |
| 75 | Bayshore Exploration LLC | Bellville, TX 77418 | Oil & Gas Operator | Dec 2016 |
| 76 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 77 | Beach Oil & Gas, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Dec 2020 |
| 78 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2004 |
| 79 | Bell, O. M. | | Oil & Gas Operator | Mar 2008 |
| 80 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Dec 2020 |
| 81 | Bellows, Dewey Oper. Co., LTD. | | Oil & Gas Operator | Jul 2013 |
| 82 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Dec 2020 |
| 83 | Bexco Operating, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Dec 2020 |
| 84 | Bishop, J. E., Inc. | | Gas Operator | Jul 2012 |
| 85 | Blackbrush O & G, Inc. | San Antonio, TX 78258-3505 | Oil & Gas Operator | Apr 2012 |
| 86 | Blackbrush O & G, LLC | San Antonio, TX 78258 | Oil & Gas Operator | Dec 2020 |
| 87 | Blakenergy Operating, LLC | Spring, TX 77386 | Oil & Gas Operator | Dec 2020 |
| 88 | Bledsoe, R.K. Trust Oil Operator | | Oil & Gas Operator | Dec 2020 |
| 89 | Block "T" Petroleum, Inc. | Tyler, TX 75710-2080 | Oil & Gas Operator | Dec 2020 |
| 90 | Blue Wing Energy, Inc. | Portland, TX 78374 | Oil & Gas Operator | Dec 2020 |
| 91 | Bluefin Resources LLC | Houston, TX 77046 | Oil & Gas Operator | Dec 2020 |
| 92 | Bluejay Energy Corporation | Waxahachie, TX 75168 | Oil Operator | Feb 2008 |
| 93 | Bluestone Natural Resources, LLC | | Oil & Gas Operator | Jan 2015 |
| 94 | Bluestone Production Company LP | | Oil & Gas Operator | Jun 2007 |
| 95 | Boester, H. F. | | Oil & Gas Operator | Aug 2003 |
| 96 | Boss Expl & Prod Corporation | | Oil & Gas Operator | Apr 2008 |
| 97 | Bounty Production Company | | Oil & Gas Operator | Dec 2005 |
| 98 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 99 | BP America Production Company | Houston, TX 77079 | Oil & Gas Operator | Dec 2020 |
| 100 | Braman, D. H., Jr. | Victoria, TX 77901 | Oil & Gas Operator | Dec 2008 |