| 1 | 5H Oil Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2016 |
| 2 | A.C.T. Operating Company | Lubbock, TX 79401 | Oil & Gas Operator | Sep 2026 |
| 3 | Acoma Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Sep 2026 |
| 4 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Sep 2026 |
| 5 | Altura Energy LTD. | Houston, TX 77210 | Oil & Gas Operator | Apr 2000 |
| 6 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 7 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 8 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Sep 2026 |
| 9 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2026 |
| 10 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2026 |
| 11 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 12 | Ard Drilling Company Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2000 |
| 13 | Ard, Julian | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2002 |
| 14 | Aspect Energy, LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2026 |
| 15 | Aspect Resources LLC | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 16 | Aspen Energy, Inc. | Seguin, TX 78156 | Oil & Gas Operator | Jul 2019 |
| 17 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 18 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 19 | Augusta Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Nov 2002 |
| 20 | Aviator Energy, LLC | Plano, TX 75093 | Oil & Gas Operator | Sep 2026 |
| 21 | Azimuth Energy, LLC | Denver, CO 80203 | Oil & Gas Operator | Sep 2006 |
| 22 | B & B Farm Industries, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2002 |
| 23 | B & B Operating Company | Odessa, TX 79760 | Oil & Gas Operator | Sep 2026 |
| 24 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Sep 2026 |
| 25 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 26 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 27 | Baytech Inc | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 28 | BC Operating, Inc. | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 29 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 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 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 33 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 34 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 35 | Blackflat Oil Company LLC | Lubbock, TX 79424 | Oil Operator | Sep 2026 |
| 36 | Blackrock Operating, LLC | Tuscola, TX 79562 | Oil & Gas Operator | Sep 2026 |
| 37 | Bledsoe Partners, Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 1995 |
| 38 | Blue Ridge Resources, LLC | Midland, TX 79710 | Oil & Gas Operator | Sep 2026 |
| 39 | Boaz Energy II Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 40 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 41 | Breitburn Operating LP | Keithville, LA 71047 | Oil & Gas Operator | Sep 2026 |
| 42 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 43 | Broadway Operating Company Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Aug 2002 |
| 44 | Brock Oil & Gas Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2019 |
| 45 | Brock, J. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 46 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 47 | Brown, H.L. Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 48 | Browning Oil Company, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Sep 2026 |
| 49 | Bryant & White Oil Co. | Whiteface, TX 79379 | Oil & Gas Operator | Nov 2012 |
| 50 | Bryant Oil | Levelland, TX 79336 | Oil & Gas Operator | Sep 2026 |
| 51 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 52 | Bullin, R. E. Operating Inc. | Levelland, TX 79336 | Oil & Gas Operator | Sep 2026 |
| 53 | Bullin, R.E. | Levelland, TX 79336 | Oil & Gas Operator | May 1994 |
| 54 | Burgundy Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 55 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 56 | Burleson Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 57 | Burlington Resources O&G | Midland, TX 79710-1810 | Oil & Gas Operator | Mar 1997 |
| 58 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 59 | C & S Operating | Whiteface, TX 79379 | Oil & Gas Operator | Sep 2026 |
| 60 | Capataz Operating Inc | Midland, TX 79702 | Oil & Gas Operator | Sep 2020 |
| 61 | Castex Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 62 | CCF, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Apr 1998 |
| 63 | Cfo Resources, Inc. | Corpus Christ, TX 78412 | Oil & Gas Operator | Sep 2026 |
| 64 | CH-Seon Inc. | Dallas, TX 75251 | Oil & Gas Operator | Sep 2026 |
| 65 | Champlin Exploration, Inc. | Enid, OK 73702 | Oil & Gas Operator | Jun 2026 |
| 66 | Channa Operating, LLC | Houston, TX 77063 | Oil & Gas Operator | Jul 2021 |
| 67 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2026 |
| 68 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Sep 2026 |
| 69 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Sep 2026 |
| 70 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Sep 2026 |
| 71 | Cimarex Energy Co Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Jun 2026 |
| 72 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 73 | Cobalt Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Jun 2026 |
| 74 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 75 | Conoco Inc | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 76 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 77 | Consolidated Natural Res. Corp. | Kilgore, TX 75662 | Oil & Gas Operator | Jan 2016 |
| 78 | Copper Ridge Resources LLC | Midland, TX 79710 | Oil Operator | Jun 2026 |
| 79 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 80 | Cove Petroleum Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2020 |
| 81 | Cross Timbers Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 82 | Cross Timbers Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2026 |
| 83 | Crossroads Energy L.P. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 84 | Crossroads Energy Partners, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2018 |
| 85 | Crosstex Services, L.L.C. | Tuscola, TX 79562 | Oil Operator | Sep 2026 |
| 86 | Ctoc Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 87 | Culebra Oil & Gas, LLC | Shiner, TX 77984 | Oil & Gas Operator | Sep 2026 |
| 88 | D & D Enterprises | Post, TX 79356 | Oil & Gas Operator | Sep 2026 |
| 89 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Sep 2026 |
| 90 | Davcro Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Dec 2003 |
| 91 | Dekalb Energy Company | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 1996 |
| 92 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2026 |
| 93 | Desana Development Corporation | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 94 | Desert Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 95 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 96 | Diamondback E&P LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 97 | Dora Inc | Levelland, TX 79336 | Oil & Gas Operator | Jul 2019 |
| 98 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 99 | Double Barrel Oil LLC | Brenham, TX 77834 | Oil & Gas Operator | Sep 2026 |
| 100 | DP Permian Operator, LLC | Houston, TX 77024 | Oil & Gas Operator | Aug 2024 |