| 1 | A & P Oil & Gas | Leona, TX 75850 | Oil Operator | Apr 2024 |
| 2 | Aber Oil & Gas Co. | Tyler, TX 75702 | Oil & Gas Operator | Nov 2013 |
| 3 | Ac Exploration, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 4 | Activa Resources, LLC | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2024 |
| 5 | Af Operating, LLC | Tuscaloosa, AL 35404 | Oil Operator | Sep 2012 |
| 6 | Allied Operating Texas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 7 | Allison/Hobbs Inc. | Alba, TX 75410 | Oil & Gas Operator | Apr 2024 |
| 8 | Alltex Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 9 | Alpine Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 10 | Alta Mesa Services, LP | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 11 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 12 | American Cascade Energy, Inc. | Barker, TX 77413 | Oil & Gas Operator | Apr 2024 |
| 13 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 14 | American Energy Op. Corp.,The | Houston, TX 77099 | Oil & Gas Operator | Apr 2024 |
| 15 | American Energy Partners Inc | Boerne, TX 78006 | Oil & Gas Operator | Dec 2011 |
| 16 | American Oilfield Systems, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Jun 2001 |
| 17 | American Royalty | Caldwell, TX 77836 | Oil & Gas Operator | Oct 2005 |
| 18 | Amerril Energy LLC | Houston, TX 77042 | Oil & Gas Operator | Apr 2024 |
| 19 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 20 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 21 | Amx Energy, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Apr 2024 |
| 22 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 23 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 24 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jan 2024 |
| 25 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 26 | Arbol Resources, Inc. | Houston, TX 77079 | Oil & Gas Operator | Apr 2024 |
| 27 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 28 | Argent Energy, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 29 | Aroc (Texas) Inc | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 30 | Arrowhead Energy Exp., LLC | Baton Rouge, LA 70816 | Oil & Gas Operator | Nov 2006 |
| 31 | Arrowhead Enterprises, Inc. | Baton Rouge, LA 70816 | Oil & Gas Operator | Apr 2001 |
| 32 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 33 | Asm Oil & Gas Company, Inc. | Dallas, TX 75367 | Oil & Gas Operator | May 2020 |
| 34 | Aspen Energy Group, Inc. | Santa Ynez, CA 93460 | Oil & Gas Operator | Mar 2015 |
| 35 | Atkinson Energy Corporation | Giddings, TX 78942 | Oil & Gas Operator | Jan 2010 |
| 36 | Atlantis Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Apr 2024 |
| 37 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 38 | B.W.O.C., Inc. | Plano, TX 75026 | Oil & Gas Operator | Apr 2024 |
| 39 | Balance Production Corporation | Temple, TX 76503 | Oil & Gas Operator | Apr 2024 |
| 40 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 41 | Barrow-Shaver Resources Co. | Tyler, TX 75703 | Oil & Gas Operator | Apr 2024 |
| 42 | Basa Resources Inc | Dallas, TX 75254 | Oil & Gas Operator | Apr 2024 |
| 43 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 44 | Bechtel Energy Resources Corp. | Houston, TX 77210 | Oil & Gas Operator | Jun 1996 |
| 45 | Bell & Kinley Company | Piedmont, OK 73078 | Oil & Gas Operator | Aug 2017 |
| 46 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 47 | Berkshire Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 48 | Berkshire Woodlawn Field, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2007 |
| 49 | Big Run Production Company | Tyler, TX 75701 | Oil & Gas Operator | Apr 2024 |
| 50 | Blackwell Operating Company | Houston, TX 77227 | Oil & Gas Operator | Jun 2007 |
| 51 | Bledsoe Petro Corporation | Dallas, TX 75201 | Oil & Gas Operator | Dec 2000 |
| 52 | Blue Star Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 53 | Bowles Energy, Inc. | Longview, TX 75601 | Oil & Gas Operator | Apr 2024 |
| 54 | Bozeman, John F. | Rosenberg, TX 77471 | Oil & Gas Operator | Sep 2005 |
| 55 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 56 | Bralex Operating LLC | Dallas, TX 75367 | Oil & Gas Operator | Apr 2024 |
| 57 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Apr 2024 |
| 58 | Brandon Energy, Inc. | Bullard, TX 75757 | Oil & Gas Operator | Nov 2007 |
| 59 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2024 |
| 60 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 61 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2023 |
| 62 | Brooks Petroleum Company | Tyler, TX 75703 | Oil & Gas Operator | Apr 2024 |
| 63 | Brooks Petroleum Inc | Kilgore, TX 75663 | Oil & Gas Operator | May 1999 |
| 64 | Brothers Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Jan 2004 |
| 65 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 66 | Brown, H.L. Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 67 | Bryant & Carr, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1994 |
| 68 | Bryant - Chase Energy Corp. | Tyler, TX 75701 | Oil & Gas Operator | Aug 2004 |
| 69 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Apr 2024 |
| 70 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Apr 2024 |
| 71 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 72 | Buttes Resources Company | Houston, TX 77056 | Oil & Gas Operator | May 2007 |
| 73 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2024 |
| 74 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Apr 2024 |
| 75 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Apr 2024 |
| 76 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 77 | Calistoga Energy Reserves, LLC | Houston, TX 77063 | Oil & Gas Operator | Apr 2024 |
| 78 | Calto Operating Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | May 2004 |
| 79 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Apr 2024 |
| 80 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Apr 2024 |
| 81 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 82 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 83 | Cape Operating, Inc. | Longview, TX 75608 | Oil & Gas Operator | Nov 2007 |
| 84 | Cape, Randy | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 85 | Carr Resources, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Apr 2024 |
| 86 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | Apr 2024 |
| 87 | Cci Gulf Coast Upstream LLC | Teague, TX 75860 | Oil & Gas Operator | Mar 2021 |
| 88 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2024 |
| 89 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 90 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2024 |
| 91 | Cheyenne Minerals, Inc. | Houston, TX 77030 | Oil & Gas Operator | Jun 2001 |
| 92 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 93 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | Apr 2024 |
| 94 | Classic Oil & Gas, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jan 2004 |
| 95 | CLR Secondary Recovery, LLC | Mabank, TX 75147 | Oil & Gas Operator | Apr 2024 |
| 96 | CMS Nomeco Oil & Gas Co. | Jackson, MI 49201 | Oil & Gas Operator | Jan 2015 |
| 97 | Coastal Expanse Oil & Gas | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 98 | Comstock Oil & Gas, LLC | Frisco, TX 75034 | Oil & Gas Operator | Apr 2024 |
| 99 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 100 | Consolidated Oil & Gas Inc | Wichita, KS 67202 | Oil & Gas Operator | Dec 2012 |