| 1 | 20TH Century Pipe & Equip.Co.Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 2 | 3 S Production, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Apr 2024 |
| 3 | 3-L Drilling | Abilene, TX 79605 | Oil & Gas Operator | Apr 2024 |
| 4 | 86-Oil & Gas | Hamlin, TX 79520 | Oil & Gas Operator | Oct 2003 |
| 5 | A D D Productions | Sweetwater, TX 79556 | Oil & Gas Operator | Jul 2019 |
| 6 | A.C.T. Operating Company | Lubbock, TX 79401 | Oil & Gas Operator | Apr 2024 |
| 7 | A.E.N. Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jan 1996 |
| 8 | Abernathy Auto, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 9 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2024 |
| 10 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 11 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 12 | Aethon I LP | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 13 | Alegre Energy Operating, LP | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2005 |
| 14 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2024 |
| 15 | Allegro Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 16 | Alpine Petroleum | Abilene, TX 79608 | Oil & Gas Operator | Jul 2018 |
| 17 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 18 | Amen Oil LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 19 | American Cascade Energy, Inc. | Barker, TX 77413 | Oil & Gas Operator | Apr 2024 |
| 20 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 21 | Amerind Oil Company, LTD. | Midland, TX 79701 | Oil & Gas Operator | Nov 2004 |
| 22 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Apr 2024 |
| 23 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 24 | Anderson, James K. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 25 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 26 | Aransas DRLG & Workover Co Inc | Corpus Chrsti, TX 78409 | Oil & Gas Operator | Jul 2019 |
| 27 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 28 | Arkland Producing Co Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2023 |
| 29 | Arleand Resources | Overton, TX 75684 | Oil & Gas Operator | Apr 2024 |
| 30 | Arrington Oil & Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 31 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 32 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 33 | Augusta Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Nov 2002 |
| 34 | Avips Petroleum, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Jun 1996 |
| 35 | B & G Energy Corporation | Dallas, TX 75214 | Oil & Gas Operator | Apr 2024 |
| 36 | B. & L. Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Apr 2024 |
| 37 | Banam Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2013 |
| 38 | Barbee, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 39 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 40 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 41 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2024 |
| 42 | Bayridge Texas Corp. | Big Spring, TX 79720 | Oil & Gas Operator | Jul 2004 |
| 43 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 44 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 45 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 46 | Bell, Johnny Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 47 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 48 | Betwell Oil & Gas Company | Hialeah, FL 33002 | Oil & Gas Operator | Apr 2024 |
| 49 | Blake Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | May 2004 |
| 50 | Bloomer & Associates, Inc. | Lago VIsta, TX 78645 | Oil & Gas Operator | Jul 2002 |
| 51 | Bootstrap Exploration, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Jun 2021 |
| 52 | Borden, Roland Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 53 | Borderline Operating Corp. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 54 | Bowles Energy, Inc. | Longview, TX 75601 | Oil & Gas Operator | Apr 2024 |
| 55 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 56 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2024 |
| 57 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 58 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2023 |
| 59 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 60 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 61 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 62 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Apr 2024 |
| 63 | Bryant & Carr, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1994 |
| 64 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 65 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 66 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 67 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 68 | Caddo Corporation | Austin, TX 78731 | Oil & Gas Operator | Apr 2024 |
| 69 | Calhoun & Ellison Oil Co. | San Antonio, TX 78248 | Oil & Gas Operator | Dec 1997 |
| 70 | Calto Operating Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2004 |
| 71 | Caminar Oil & Gas, LLC | Abilene, TX 79602 | Oil & Gas Operator | Apr 2024 |
| 72 | Campana Petroleum Company | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 73 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Apr 2024 |
| 74 | Carroll Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | Feb 2022 |
| 75 | Cascade Resources LLC | Edmond, OK 73083 | Oil & Gas Operator | Dec 2023 |
| 76 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 77 | CCF, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Apr 1998 |
| 78 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2024 |
| 79 | Central Texas Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 80 | Centurion Oil & Gas Op. Co. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 1998 |
| 81 | Chalmers Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 1997 |
| 82 | Chambers, R. H. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2006 |
| 83 | Chambers, R. H. LLC | Abilene, TX 79606 | Oil & Gas Operator | Apr 2024 |
| 84 | Chancellor, Earl Sales Co., Inc. | Sweetwater, TX 79556 | Oil & Gas Operator | Apr 2024 |
| 85 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 86 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 87 | Charter Petroleum Company | Abilene, TX 79605 | Oil & Gas Operator | Apr 2024 |
| 88 | Chase Operating Company | Abilene, TX 79608 | Oil & Gas Operator | Feb 2016 |
| 89 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 90 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2024 |
| 91 | Cholla Petroleum, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 92 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 93 | Clark, John M., Inc. | Midland, TX 79704 | Oil & Gas Operator | Apr 2024 |
| 94 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 95 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 96 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 97 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Apr 2024 |
| 98 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 99 | Condor Petroleum, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 100 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |