| 1 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 2 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2024 |
| 3 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 4 | Aggietech Oil, LTD. | Midland, TX 79701 | Oil & Gas Operator | Aug 2016 |
| 5 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2024 |
| 6 | Allegro Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 7 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 8 | Americo Energy Resources, LLC | Houston, TX 77063 | Oil & Gas Operator | Apr 2024 |
| 9 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 10 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jan 2024 |
| 11 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2024 |
| 12 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 13 | Arkoma Prod Co Of Texas, Inc. | Dallas, TX 75225 | Oil Operator | May 2004 |
| 14 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 15 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 16 | Atlas Energy Corporation (Del.) | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2024 |
| 17 | B-B Production | Ira, TX 79527 | Oil & Gas Operator | Apr 2024 |
| 18 | B. B. & C. | Big Spring, TX 79720 | Oil Operator | Apr 2024 |
| 19 | Banam Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2013 |
| 20 | Barbee, Bill J. | Amarillo, TX 79101 | Oil & Gas Operator | Dec 1994 |
| 21 | Barbee, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 22 | Basa Resources Inc | Dallas, TX 75254 | Oil & Gas Operator | Apr 2024 |
| 23 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 24 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 25 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 26 | Bayswater Operating Company LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2024 |
| 27 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 28 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 29 | Beasley, Kenneth | Abilene, TX 79602 | Oil & Gas Operator | Apr 2024 |
| 30 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 31 | Beekay Company | Dallas, TX 75219 | Oil & Gas Operator | Dec 1996 |
| 32 | Bep Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 33 | Berry Energy Companies | Abilene, TX 79608 | Oil & Gas Operator | Apr 2024 |
| 34 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 35 | Big D Energy Company | New Braunfels, TX 78132 | Oil & Gas Operator | Apr 2024 |
| 36 | Big Star Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2017 |
| 37 | Bishop, D. L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2012 |
| 38 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 39 | Blue Ridge Oil & Gas Exp., Inc. | Belleville, MI 48111 | Gas Operator | Jul 1994 |
| 40 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Apr 2024 |
| 41 | Bonfire Operating LLC | Cresson, TX 76035 | Oil & Gas Operator | Apr 2024 |
| 42 | Boss Services, L.L.C. | Ira, TX 79527 | Oil & Gas Operator | Aug 2019 |
| 43 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Apr 2024 |
| 44 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2023 |
| 45 | Breitburn Operating, LP | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 46 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Jan 2024 |
| 47 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 48 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 49 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 50 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 51 | Buccaneer Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 52 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 53 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 54 | C & S Operating | Whiteface, TX 79379 | Oil & Gas Operator | Apr 2024 |
| 55 | Cab Resources, LLC | Odessa, TX 79762 | Oil Operator | Apr 2024 |
| 56 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 57 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | Apr 2024 |
| 58 | Campana Petroleum Company | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 59 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 60 | Carpenter Services | Colorado City, TX 79512 | Oil & Gas Operator | May 1996 |
| 61 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Apr 2024 |
| 62 | Cedar Bend Oil Company | Colorado City, TX 79512 | Oil & Gas Operator | Apr 2024 |
| 63 | Celero Energy LP | Midland, TX 79701 | Oil & Gas Operator | May 2011 |
| 64 | Chalk, Otis, Estate | Big Spring, TX 79721 | Oil & Gas Operator | Jan 2006 |
| 65 | Chambers Operating, Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Mar 2006 |
| 66 | Chambers, R. H. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2006 |
| 67 | Chambers, R. H. LLC | Abilene, TX 79606 | Oil & Gas Operator | Apr 2024 |
| 68 | Chancellor, Earl Sales Co., Inc. | Sweetwater, TX 79556 | Oil & Gas Operator | Apr 2024 |
| 69 | Chandler & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | May 1997 |
| 70 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 71 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 72 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 73 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 74 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Apr 2024 |
| 75 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 76 | Circle H Oil Company | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2020 |
| 77 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Apr 2024 |
| 78 | Coalinga Corporation | Houston, TX 77002 | Oil & Gas Operator | May 1999 |
| 79 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 80 | Cockrell Production Co., Inc. | Irving, TX 75014 | Oil & Gas Operator | Apr 2024 |
| 81 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 82 | Cole, John Otis | Big Spring, TX 79721 | Oil & Gas Operator | Jan 1999 |
| 83 | Compass Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 84 | Comstock Energy, LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2024 |
| 85 | Concho Oilfield Serv & Oper Co. | Eden, TX 76837 | Oil & Gas Operator | Apr 2024 |
| 86 | Concho Resources Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2004 |
| 87 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 88 | Corona Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 89 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 90 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 91 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 92 | Cowboys Resources Corp. | New Braunfels, TX 78132 | Oil Operator | Jan 2008 |
| 93 | Cox, Robert G. & Associates,Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 1994 |
| 94 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | Apr 2024 |
| 95 | Crownquest Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 96 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2024 |
| 97 | D.J.F. Services, Inc. | Holdenville, OK 74848 | Oil & Gas Operator | Apr 2024 |
| 98 | D.O.E. Energy | Palestine, TX 75801 | Oil & Gas Operator | Apr 2024 |
| 99 | Decleva, Paul | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2020 |
| 100 | Dedica Energy Corporation | Mattoon, IL 61938 | Oil & Gas Operator | Mar 2008 |