| 1 | 1776 Energy Operators, LLC | Houston, TX 77070 | Oil & Gas Operator | Feb 2025 |
| 2 | 4J Energy LLC | Houston, TX 77079 | Oil & Gas Operator | Aug 2022 |
| 3 | 5H Oil Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 4 | Acorn Oil & Gas, Inc. | Orchard, TX 77464 | Oil Operator | Sep 2017 |
| 5 | Acorn Oil & Gas, LLC | Iraan, TX 79744 | Oil & Gas Operator | Feb 2025 |
| 6 | Activa Resources, LLC | San Antonio, TX 78205 | Oil & Gas Operator | Feb 2025 |
| 7 | Ageron Energy, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2025 |
| 8 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 9 | Alcor Energy, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Feb 2025 |
| 10 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 11 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 12 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 13 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Feb 2025 |
| 14 | Anadarko Minerals Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 15 | Arrco Operating, LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Feb 2025 |
| 16 | Arrowhead Enterprises, Inc. | Baton Rouge, LA 70816 | Oil & Gas Operator | Apr 2001 |
| 17 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2025 |
| 18 | Austin Resources Corporation | Houston, TX 77027 | Oil & Gas Operator | Mar 2008 |
| 19 | Av-Tech Resources Corporation | Kerrville, TX 78028 | Oil & Gas Operator | Jul 2022 |
| 20 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Feb 2025 |
| 21 | Ayers Oil Co. | Crystal City, TX 78839 | Oil & Gas Operator | Sep 1995 |
| 22 | Barnett Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Feb 2025 |
| 23 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 24 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Feb 2025 |
| 25 | Beachtex Oil Company, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Feb 2025 |
| 26 | Bennett, R. C., Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2019 |
| 27 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Jan 2025 |
| 28 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 29 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Feb 2025 |
| 30 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Feb 2025 |
| 31 | Blue Star Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2025 |
| 32 | Bogey Oil & Gas | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Sep 2003 |
| 33 | Bollinger Drilling Co. | Del Rio, TX 78840 | Oil Operator | Feb 2025 |
| 34 | Bommer Engineering Co. | San Antonio, TX 78260 | Oil & Gas Operator | Feb 2025 |
| 35 | Botasch Operating, LLC | Dilley, TX 78017 | Oil & Gas Operator | Feb 2025 |
| 36 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2024 |
| 37 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Feb 2025 |
| 38 | BP Products North America Inc | Chicago, IL 60606 | Gas Operator | Jan 2017 |
| 39 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 40 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2025 |
| 41 | Bridger Oil Inc. | Richmond, TX 77406 | Oil & Gas Operator | Feb 2025 |
| 42 | Brooks, E. B., Jr. | Dallas, TX 75206 | Oil & Gas Operator | May 2018 |
| 43 | Brown, C. Douglas, LLC | Dallas, TX 75209 | Oil & Gas Operator | Dec 2005 |
| 44 | Brown, John Oil Co. | Eagle Pass, TX 78852 | Oil & Gas Operator | Feb 2025 |
| 45 | Brymer Contracting Incorporated | Pleasanton, TX 78064 | Oil & Gas Operator | Feb 2025 |
| 46 | Brymer, Jack Contr. Serv. | George West, TX 78022 | Oil Operator | Feb 2025 |
| 47 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Feb 2025 |
| 48 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 49 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Feb 2025 |
| 50 | C And S Oil & Gas | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1998 |
| 51 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Nov 2024 |
| 52 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | Feb 2025 |
| 53 | Callon (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2023 |
| 54 | Caribbean Energy, L.L.C. | Cotulla, TX 78014 | Oil & Gas Operator | Nov 2019 |
| 55 | Carrizo (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jan 2020 |
| 56 | Carrizo Exploration, Inc. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Aug 2016 |
| 57 | Carter E&P, LLC | Johnson City, TX 78636 | Oil & Gas Operator | Dec 2016 |
| 58 | Castle Gas Corporation | San Angelo, TX 76902 | Oil & Gas Operator | Oct 2014 |
| 59 | Catarina Petroleum L. C. | Dallas, TX 75228 | Oil & Gas Operator | Jun 2008 |
| 60 | Cavalier Oil & Gas, Inc. | Buchanan Dam, TX 78609 | Oil & Gas Operator | Feb 2025 |
| 61 | Ceniza Petroleum, Inc. | Portland, TX 78374 | Oil & Gas Operator | Feb 2025 |
| 62 | Centaur Exploration LLC | Evanston, WY 82931 | Oil & Gas Operator | Feb 2025 |
| 63 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2025 |
| 64 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2024 |
| 65 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2025 |
| 66 | Christico Petroleum Company | San Antonio, TX 78216 | Oil & Gas Operator | Feb 2025 |
| 67 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Feb 2025 |
| 68 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 69 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Feb 2025 |
| 70 | Civron Petroleum Res., LLC | San Antonio, TX 78229 | Oil & Gas Operator | Feb 2025 |
| 71 | Clark, John M. | Midland, TX 79701 | Oil & Gas Operator | Dec 1993 |
| 72 | Clipper Operating Co., Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 2000 |
| 73 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Feb 2025 |
| 74 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 75 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 76 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 77 | Colt Operating Corporation | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 78 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 79 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Feb 2025 |
| 80 | Contango Resources LLC | Andrews, TX 79714 | Oil & Gas Operator | Feb 2025 |
| 81 | Contango Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 82 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 83 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 84 | Conway Energy Oper Services Inc. | San Diego, TX 78384 | Oil & Gas Operator | Feb 2025 |
| 85 | Core E & P Corp. | Victoria, TX 77902 | Oil & Gas Operator | Feb 2025 |
| 86 | Cornerstone E & P Company, LP | Irving, TX 75038 | Oil & Gas Operator | Nov 2010 |
| 87 | Crimson Energy Partners, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2009 |
| 88 | Crimson Exploration Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2006 |
| 89 | Crimson Exploration Oper., Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2019 |
| 90 | Cuatro Petro Corp. | Richardson, TX 75080 | Oil & Gas Operator | Feb 2025 |
| 91 | CW Dalcan Management SVCS, LTD. | Frisco, TX 75033 | Oil Operator | Feb 2025 |
| 92 | Dantex Oil & Gas, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 93 | Dawsey Operating Company | Georgetown, TX 78628 | Oil & Gas Operator | Mar 2016 |
| 94 | Dewbre Petroleum Corporation | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Feb 2025 |
| 95 | Diamond Energy Services, LP | Tulsa, OK 74103 | Oil Operator | Feb 2025 |
| 96 | Diamond Energy, Inc. | Sherman, TX 75091 | Oil & Gas Operator | Feb 2025 |
| 97 | Dinero Oil Corporation | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Nov 1999 |
| 98 | Dirnett, Inc. | Tuleta, TX 78162 | Oil & Gas Operator | Feb 2025 |
| 99 | DKW Energy, Inc. | Sherman Oaks, CA 91403 | Oil & Gas Operator | Feb 2025 |
| 100 | Dolphin Petroleum | Alice, TX 78333 | Oil & Gas Operator | Jun 2008 |