| 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 | Sep 2025 |
| 3 | 7S Oil & Gas, LLC | Midland, TX 79706 | Oil & Gas Operator | Dec 2019 |
| 4 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Sep 2025 |
| 5 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 6 | Aethon I LP | Dallas, TX 75206 | Oil & Gas Operator | Mar 2015 |
| 7 | Allied Energy Operating, LLC | McKinney, TX 75071 | Oil Operator | Sep 2025 |
| 8 | Alpine Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 9 | Alps Oil Company | Odessa, TX 79760 | Oil & Gas Operator | Aug 1999 |
| 10 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 11 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 12 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Sep 2025 |
| 13 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2025 |
| 14 | Antelope Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2024 |
| 15 | Antelope Production Co. | Midland, TX 79701 | Oil & Gas Operator | Oct 1995 |
| 16 | Anthony, Bob G. Inc. | Brookhaven, MS 39601 | Oil & Gas Operator | Sep 2025 |
| 17 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2025 |
| 18 | Apv McCamey LLC | MC Camey, TX 79752 | Oil & Gas Operator | Sep 2025 |
| 19 | Ausland Production Company | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 20 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Sep 2025 |
| 21 | B & S Salvage | Post, TX 79356 | Oil & Gas Operator | Sep 2025 |
| 22 | B C & D Oil & Gas Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Sep 2025 |
| 23 | Bandera Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2017 |
| 24 | Barnett Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Sep 2025 |
| 25 | Baron Energy Inc. | San Marcos, TX 78666 | Oil & Gas Operator | Sep 2025 |
| 26 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 27 | Baxter, D. B. Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2025 |
| 28 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 29 | BBS Oil Field Services Inc | Post, TX 79356 | Oil & Gas Operator | Sep 2025 |
| 30 | Bee-Jay Energy | Whiteface, TX 79379 | Oil & Gas Operator | Nov 1993 |
| 31 | Bee-Jay Petro, Inc. | Levelland, TX 79336 | Oil & Gas Operator | Jun 2024 |
| 32 | Beekay Company | Dallas, TX 75219 | Oil & Gas Operator | Dec 1996 |
| 33 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 34 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 35 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 36 | Bevers SWD, Inc. | Lubbock, TX 79453 | Oil & Gas Operator | Sep 2025 |
| 37 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 38 | Big Star Oil & Gas, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2017 |
| 39 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 40 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 41 | Blue Ridge Resources, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2025 |
| 42 | Boaz Energy II Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 43 | Bond Operating Company | Dallas, TX 75219 | Oil & Gas Operator | Jan 2025 |
| 44 | Boone & Moore Oil Co. | Lubbock, TX 79453 | Oil & Gas Operator | Mar 1995 |
| 45 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 46 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2025 |
| 47 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 48 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 49 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 50 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2025 |
| 51 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 52 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 53 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Sep 2025 |
| 54 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 55 | Brown, Geo. R Partnership,LP,The | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 56 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 57 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Sep 2025 |
| 58 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 59 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2025 |
| 60 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 61 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 62 | Burns, Bill C. | Midland, TX 79701 | Oil & Gas Operator | Dec 1997 |
| 63 | C & S Operating | Whiteface, TX 79379 | Oil & Gas Operator | Sep 2025 |
| 64 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 65 | Cada Operating, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2004 |
| 66 | Cal Oil Company | Missouri City, TX 77459 | Oil Operator | May 2022 |
| 67 | Callaway Production Co., Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 1996 |
| 68 | Canyon Exploration Co. | Amarillo, TX 79105 | Oil & Gas Operator | May 2025 |
| 69 | Carrland Oil & Gas Inc. | Prosper, TX 75078 | Oil & Gas Operator | Sep 2025 |
| 70 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 71 | Cawell Energy, LLC | Spring, TX 77379 | Oil Operator | Sep 2025 |
| 72 | Centaur Petroleum Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2025 |
| 73 | Cesinger Exploration Service, In | Dallas, TX 75208 | Oil & Gas Operator | Mar 2006 |
| 74 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 75 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2025 |
| 76 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 77 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Sep 2025 |
| 78 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Sep 2025 |
| 79 | Cimarex Energy Co. | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 80 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Sep 2025 |
| 81 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | Sep 2025 |
| 82 | Clearfork Petroleum Inc. (A) | Lubbock, TX 79408 | Oil & Gas Operator | Sep 2025 |
| 83 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Sep 2025 |
| 84 | Co-Co Oil, Inc. | Lubbock, TX 79407 | Oil & Gas Operator | Aug 2003 |
| 85 | Coastal Oil & Gas Corporation | Houston, TX 77252 | Oil & Gas Operator | Dec 2009 |
| 86 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2025 |
| 87 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 88 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 89 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 90 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 91 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2025 |
| 92 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 93 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Sep 2025 |
| 94 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 95 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 96 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 97 | Cox, John L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 98 | Cross Cut Petroleum, LLC | Abilene, TX 79602 | Oil Operator | Sep 2025 |
| 99 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2025 |
| 100 | Cross Timbers Operating Co | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |