| 1 | 3-M Energy Corporation | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2017 |
| 2 | 3turtle Oil & Gas, LLC | San Angelo, TX 76904 | Oil Operator | Apr 2024 |
| 3 | 7S Oil & Gas, LLC | Midland, TX 79706 | Oil & Gas Operator | Dec 2019 |
| 4 | Aaron & Jeter | Seminole, TX 79360 | Oil & Gas Operator | Jan 2003 |
| 5 | Accell Natural Gas Company | Houston, TX 77042 | Oil & Gas Operator | Sep 1998 |
| 6 | Acoma Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Apr 2024 |
| 7 | Adams Fee Properties Inc. | Midland, TX 79701 | Gas Operator | May 1999 |
| 8 | Adventure Exploration PTRS, LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2012 |
| 9 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 10 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 11 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 12 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 13 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 14 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 15 | American Energy Partners Inc | Boerne, TX 78006 | Oil & Gas Operator | Dec 2011 |
| 16 | American Energy-Perm Basin, LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | May 2016 |
| 17 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 18 | Amistad Energy Services, LLC | Katy, TX 77450 | Oil & Gas Operator | Oct 2017 |
| 19 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 20 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 21 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 22 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jan 2024 |
| 23 | Anderson Energy Corporation | Arvada, CO 80004 | Oil & Gas Operator | Apr 2024 |
| 24 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 25 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 26 | Approach Operating LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Sep 2020 |
| 27 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2024 |
| 28 | Aratex Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2003 |
| 29 | Araxas Exploration, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 1998 |
| 30 | Arch Oil & Gas LLC | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 31 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 32 | Area Pipe And Equipment | Midland, TX 79702 | Oil & Gas Operator | Apr 2003 |
| 33 | Arkoma Prod Co Of Texas, Inc. | Dallas, TX 75225 | Oil Operator | May 2004 |
| 34 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 35 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 36 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Apr 2024 |
| 37 | Atropos Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 38 | Austin Production Company, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Mar 2015 |
| 39 | Austral Oil Company Incorporated | Sulphur, LA 70663 | Oil & Gas Operator | Mar 2008 |
| 40 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 41 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 42 | B.P. Oil Company | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 43 | Badger Oil Company | Midland, TX 79701 | Oil & Gas Operator | Jun 1996 |
| 44 | Baker Resources | San Angelo, TX 76902 | Oil & Gas Operator | Aug 2021 |
| 45 | Baker Resources, LLC | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2024 |
| 46 | Balcones Production Company | Houston, TX 77002 | Oil & Gas Operator | Feb 1996 |
| 47 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 48 | Barnett Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 49 | Barron Petroleum LLC | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2024 |
| 50 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Apr 2024 |
| 51 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 52 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 53 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2024 |
| 54 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 55 | Bayou Bend Petroleum Corporation | Austin, TX 78734 | Oil & Gas Operator | Sep 2006 |
| 56 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 57 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 58 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 59 | Bean & Bean Inc. | Houston, TX 77269 | Oil & Gas Operator | Jan 2023 |
| 60 | Beaver Oil & Gas Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 61 | Bedrock Production, LLC | Katy, TX 77449 | Oil & Gas Operator | Apr 2024 |
| 62 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 63 | Belvan Corp. | Midland, TX 79701 | Oil & Gas Operator | Jun 1998 |
| 64 | Bennett, R. C., Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2019 |
| 65 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 66 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 67 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 68 | Bishop, D. L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2012 |
| 69 | BKM Production | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2024 |
| 70 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 71 | Blackstone Energy Services LLC | Christoval, TX 76935 | Oil & Gas Operator | Apr 2024 |
| 72 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 73 | Blanco Oil Company | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2010 |
| 74 | Bledsoe Partners, Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 1995 |
| 75 | Blue Ridge Oil & Gas Exp., Inc. | Belleville, MI 48111 | Gas Operator | Jul 1994 |
| 76 | Bluegrass Energy Inc | Houston, TX 77057 | Oil & Gas Operator | Jan 2024 |
| 77 | Boaz Energy II Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 78 | Bob Hughes Oil Company, LLC | San Angelo, TX 76901 | Oil & Gas Operator | Apr 2024 |
| 79 | Bodark Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Jul 2009 |
| 80 | Bolding Energy, LLC | Sterling City, TX 76951 | Oil & Gas Operator | Apr 2024 |
| 81 | Bomar Operating Co., LC | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2024 |
| 82 | Bonfire Operating LLC | Cresson, TX 76035 | Oil & Gas Operator | Apr 2024 |
| 83 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 84 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 85 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Apr 2024 |
| 86 | Brahaney Drilling Co. | Midland, TX 79702 | Oil & Gas Operator | Feb 2014 |
| 87 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 88 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2023 |
| 89 | Breeze Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1993 |
| 90 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 91 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 92 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 93 | Bright Oil Company | Cumming, GA 30028 | Oil & Gas Operator | Apr 2024 |
| 94 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 95 | Brody Oil & Gas Services, Inc. | Kermit, TX 79745 | Oil & Gas Operator | Apr 2024 |
| 96 | Broman Oil & Gas LP | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2017 |
| 97 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 98 | Brotherton Production Co. | Spokane, WA 99216 | Oil & Gas Operator | Apr 2024 |
| 99 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 100 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |