| 1 | 84 Energy LLC | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 2025 |
| 2 | Acock Operating Limited | San Antonio, TX 78270 | Oil & Gas Operator | Oct 2025 |
| 3 | Ada Belle Oil & Gas Company | Sourlake, TX 77659 | Oil Operator | Dec 2023 |
| 4 | Aj'S Pump Truck Service, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Oct 2025 |
| 5 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | Oct 2025 |
| 6 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Oct 2025 |
| 7 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 8 | Alltex Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 9 | Alpine Exploration Co, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Nov 2017 |
| 10 | Alpine Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 11 | Alta Mesa Services, LP | Houston, TX 77084 | Oil & Gas Operator | Oct 2025 |
| 12 | Altex Resources, Inc. | Carney, OK 74832 | Oil & Gas Operator | Mar 2015 |
| 13 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 14 | Amend Energy Company | Houston, TX 77227 | Oil & Gas Operator | Apr 2002 |
| 15 | American Cascade Energy, Inc. | Barker, TX 77413 | Oil & Gas Operator | Oct 2025 |
| 16 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 17 | American Energy Op. Corp.,The | Houston, TX 77099 | Oil & Gas Operator | Oct 2025 |
| 18 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 19 | Anderson Producing, Inc. | Houston, TX 77057 | Oil & Gas Operator | Sep 2013 |
| 20 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 21 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 22 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 23 | Apb Oil Corporation | Houston, TX 77052 | Oil & Gas Operator | Apr 1996 |
| 24 | Arcadia Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Oct 2025 |
| 25 | Arco Oil & Gas Co.-Silsbee | Lafayette, LA 70505 | Oil & Gas Operator | Jul 1993 |
| 26 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 27 | Arista Novelty, Inc. | Houston, TX 77256 | Oil & Gas Operator | Feb 1995 |
| 28 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Oct 2025 |
| 29 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 30 | Aspect Resources LLC | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 31 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 32 | Atp Oil & Gas Corporation | Houston, TX 77027 | Oil & Gas Operator | Jun 2008 |
| 33 | Auden Oil Inc. | Hardin, TX 77561 | Oil Operator | Oct 2025 |
| 34 | Austin Energy Operations, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Oct 2025 |
| 35 | Austral Oil Company Incorporated | Sulphur, LA 70663 | Oil & Gas Operator | Mar 2008 |
| 36 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |
| 37 | B & B Oil, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Oct 2025 |
| 38 | B & G Energy Corporation | Dallas, TX 75214 | Oil & Gas Operator | Oct 2025 |
| 39 | B A C O, LTD. | Hardin, TX 77561 | Oil & Gas Operator | Apr 2003 |
| 40 | B.O. Oil Company | Houston, TX 77089 | Oil & Gas Operator | Oct 2025 |
| 41 | Bagley, Roy | Magnolia, TX 77354 | Oil & Gas Operator | Oct 2025 |
| 42 | Balcones Production Company | Houston, TX 77002 | Oil & Gas Operator | Feb 1996 |
| 43 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 44 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 45 | Bear Of Texas, Inc. | Grand Rapids, MI 49546 | Oil & Gas Operator | Mar 2008 |
| 46 | Beckham Resources, Inc. | Houston, TX 77010 | Oil & Gas Operator | Mar 2011 |
| 47 | Bejo Corporation | Richmond, TX 77407 | Oil & Gas Operator | Oct 2025 |
| 48 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 49 | Benchmark Oil & Gas Co. | Houston, TX 77282 | Oil & Gas Operator | Oct 2025 |
| 50 | Bennett, Mills Estate | Houston, TX 77057 | Oil & Gas Operator | Sep 1995 |
| 51 | Bent Wing Energy, LLC | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 52 | Bepco Operating Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2006 |
| 53 | BHB Operating Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Oct 2025 |
| 54 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 55 | Big Wells Energy Corp | Katy, TX 77494 | Oil & Gas Operator | Sep 2019 |
| 56 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Oct 2025 |
| 57 | Black Pearl Exploration, L.L.C. | Houston, TX 77095 | Oil & Gas Operator | May 2015 |
| 58 | Black Stone Energy Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 59 | Black Stone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | Feb 1997 |
| 60 | Black Water Environmental L.L.C. | Texas City, TX 77590 | Oil Operator | Oct 2025 |
| 61 | Bledsoe Petro Corporation | Dallas, TX 75201 | Oil & Gas Operator | Dec 2000 |
| 62 | Block "T" Petroleum, Inc. | Tyler, TX 75707 | Oil & Gas Operator | Oct 2025 |
| 63 | Block T Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 64 | Blue Ridge Group, Inc. | Bowling Green, KY 42101 | Oil & Gas Operator | Dec 2023 |
| 65 | Bluebonnet Energy Corporation | Englewood, CO 80112 | Oil & Gas Operator | Sep 2015 |
| 66 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Oct 2025 |
| 67 | Boothe Oil Company | Batson, TX 77519 | Oil & Gas Operator | Feb 2014 |
| 68 | Boothe, H. E., Jr. | Liberty, TX 77575 | Oil & Gas Operator | Dec 1996 |
| 69 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 70 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 71 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 72 | Brandes Petroleum, B.P.C.,Inc. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 73 | Brangus Energy LLC | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 74 | Branta Production Company LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 75 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 76 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 77 | Brown, C. Douglas, LLC | Dallas, TX 75209 | Oil & Gas Operator | Dec 2005 |
| 78 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 79 | Bull Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Oct 2025 |
| 80 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Oct 2025 |
| 81 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 82 | Camden Resources, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Apr 2008 |
| 83 | Camden Resources, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Dec 2015 |
| 84 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 85 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 86 | Cashco Oil Company | Houston, TX 77024 | Oil & Gas Operator | Aug 2003 |
| 87 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 88 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 89 | Cavalry Resources LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2010 |
| 90 | Century Exploration Houston, Inc | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2011 |
| 91 | Century Royalty 2000 GP, LLC | Conroe, TX 77301 | Oil & Gas Operator | Jun 2020 |
| 92 | Chain Oil & Gas, Inc. | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 93 | Chartex Petroleum Company | Houston, TX 77070 | Oil & Gas Operator | Aug 2000 |
| 94 | Chenango Oil And Gas Co. | Groves, TX 77619 | Oil & Gas Operator | Oct 2025 |
| 95 | Chesapeake Operating LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Oct 2025 |
| 96 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2025 |
| 97 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Oct 2025 |
| 98 | Choctaw Resources, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Dec 2019 |
| 99 | Choice Exploration, Inc. | Irving, TX 75063 | Oil & Gas Operator | Oct 2025 |
| 100 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |