| 1 | 3-M Energy Corporation | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2017 |
| 2 | 3-T Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 3 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 4 | Adair Resources Inc. | Ennis, TX 75120 | Oil & Gas Operator | Apr 2018 |
| 5 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 6 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 7 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 8 | Alpine Petroleum | Abilene, TX 79608 | Oil & Gas Operator | Jul 2018 |
| 9 | Amen Oil LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 10 | American Cascade Energy, Inc. | Barker, TX 77413 | Oil & Gas Operator | Apr 2024 |
| 11 | Anathema, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 1994 |
| 12 | Anderson, James K. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 13 | Antle Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 14 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 15 | Arnot Oil Company, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 16 | Arnot, W. G., Jr. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2017 |
| 17 | Ashtola Exploration Company,Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2024 |
| 18 | Atmos Pipeline - Texas | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 19 | Avips Petroleum, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Jun 1996 |
| 20 | Aztel Operating Inc. | Windthorst, TX 76389 | Oil Operator | Oct 2003 |
| 21 | B P Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Nov 2007 |
| 22 | Barbee, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 23 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Apr 2024 |
| 24 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 25 | Bayou Operating Company, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 26 | Beach Oil & Gas, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Apr 2024 |
| 27 | Benson & Schoen Oil Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2012 |
| 28 | Benson Mineral Group Inc | Denver, CO 80202 | Oil & Gas Operator | Apr 2022 |
| 29 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 30 | Bitter Creek Petroleum Co. | Knox City, TX 79529 | Oil & Gas Operator | Apr 2024 |
| 31 | Bluff Creek Petroleum, LLC | Abilene, TX 79603 | Oil & Gas Operator | Apr 2024 |
| 32 | Bob & Ted'S Operating | Lewisville, TX 75067 | Oil & Gas Operator | Apr 1993 |
| 33 | Bootstrap Exploration, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Jun 2021 |
| 34 | Borden, Roland Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 35 | Borderline Operating Corp. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 36 | Borders, Delbert L. Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2019 |
| 37 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 38 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 39 | Braden-Deem Inc | Wichita, KS 67226 | Oil & Gas Operator | Dec 2023 |
| 40 | Brandt, Bodie | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2024 |
| 41 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2023 |
| 42 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 43 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 44 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 45 | Brittany Drilling Co. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2000 |
| 46 | Brooks, E. B., Jr. | Dallas, TX 75206 | Oil & Gas Operator | May 2018 |
| 47 | Burger, F.W. Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 48 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 49 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 50 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 51 | Calhoun & Ellison Oil Co. | San Antonio, TX 78248 | Oil & Gas Operator | Dec 1997 |
| 52 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 53 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 54 | Cannon Operating Company LLC | Garland, TX 75043 | Oil Operator | Apr 2024 |
| 55 | Capco Resources Of Texas, Inc | Irving, TX 75063 | Oil & Gas Operator | Jun 2003 |
| 56 | CD Consulting & Operating Co. | Bridgeport, TX 76426 | Oil & Gas Operator | Apr 2024 |
| 57 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2024 |
| 58 | CH4 Energy Six, LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2024 |
| 59 | Chan West Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Apr 2024 |
| 60 | Chap Operating, Inc. | Knox City, TX 79529 | Oil & Gas Operator | Apr 2024 |
| 61 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 62 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 63 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 64 | China Star Oil Co., LLC | Woodway, TX 76712 | Oil & Gas Operator | Jun 2010 |
| 65 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2024 |
| 66 | Cholla Petroleum, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 67 | Cinnabar Energy, LTD. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2018 |
| 68 | Clark, John M., Inc. | Midland, TX 79704 | Oil & Gas Operator | Apr 2024 |
| 69 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 70 | Clide Oil Corp. | Iraan, TX 79744 | Oil & Gas Operator | Nov 2015 |
| 71 | Clifton, Joe B. Exploration, Inc | Pauls Valley, OK 73075 | Oil & Gas Operator | Mar 2008 |
| 72 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Apr 2024 |
| 73 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 74 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 75 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 76 | Continual Oil & Gas, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2024 |
| 77 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 78 | Corda Corporation | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 2024 |
| 79 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 80 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 81 | Cottonwood Petroleum Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2009 |
| 82 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Apr 2024 |
| 83 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2023 |
| 84 | Crown Equipment Co. | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2024 |
| 85 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 86 | Cucharas Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Dec 2000 |
| 87 | Culebra Oil & Gas LLC | Kerrville, TX 78028 | Oil & Gas Operator | Apr 2024 |
| 88 | D. A. B. Oil Service, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2012 |
| 89 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | Apr 2024 |
| 90 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Apr 2024 |
| 91 | Dakota Resources, Inc. (I) | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 92 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 93 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 94 | Defranco Oil Account | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2004 |
| 95 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2024 |
| 96 | Denton Exploration, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Apr 2024 |
| 97 | Desana Development Corporation | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 98 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 99 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 100 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Apr 2024 |