| 1 | 19TH Hole Production, LLC | Humble, TX 77346 | Oil & Gas Operator | Feb 2025 |
| 2 | Acco Oil & Gas Company | Houston, TX 77056 | Oil & Gas Operator | Sep 2001 |
| 3 | Acierto Resources Company, LLC | Houston, TX 77070 | Oil & Gas Operator | Feb 2025 |
| 4 | Acoma Oil Corporation | Saint Paul, MN 55102 | Oil & Gas Operator | Feb 2025 |
| 5 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Apr 2020 |
| 6 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 7 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | Feb 2025 |
| 8 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 9 | Alltex Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2025 |
| 10 | Alpine Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 11 | Altman Energy, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Feb 2025 |
| 12 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 13 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 14 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 15 | American Energy Op. Corp.,The | Houston, TX 77099 | Oil & Gas Operator | Feb 2025 |
| 16 | American Energy Sources, Inc. | Spring, TX 77388 | Oil & Gas Operator | Dec 2008 |
| 17 | Anadarko Austin Chalk Company | Houston, TX 77251 | Oil & Gas Operator | Feb 2006 |
| 18 | Anaqua Oil & Gas, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2008 |
| 19 | Anschutz Exploration Corporation | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 20 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Feb 2025 |
| 21 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 22 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2025 |
| 23 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2025 |
| 24 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 25 | Aspect Energy, LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 26 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 27 | Atlas Oil & Gas Exploration, LLC | Cedar Park, TX 78613 | Oil & Gas Operator | Aug 2003 |
| 28 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2025 |
| 29 | Atmic, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jun 2008 |
| 30 | Aurora Resources Corporation | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Feb 2025 |
| 31 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Feb 2025 |
| 32 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 33 | Barnhart Co. | Houston, TX 77056 | Oil & Gas Operator | Feb 2025 |
| 34 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 35 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 36 | Bejo Corporation | Richmond, TX 77407 | Oil & Gas Operator | Feb 2025 |
| 37 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 38 | Big Creek Energy LLC | Kingfisher, OK 73750-3102 | Oil & Gas Operator | Dec 2024 |
| 39 | Big Creek Operating Company LLC | Houston, TX 77065 | Oil & Gas Operator | Feb 2025 |
| 40 | Bluco Production Co., Inc. | Austin, TX 78716 | Oil & Gas Operator | Feb 2025 |
| 41 | Blue Ridge Operating Company,Inc | Ashland, OR 97520 | Oil & Gas Operator | Oct 1998 |
| 42 | Blue Ridge Operating LLC | Willis, TX 77378 | Oil Operator | Feb 2025 |
| 43 | Boling Production Company, Inc. | Boling, TX 77420 | Oil & Gas Operator | Feb 2025 |
| 44 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Feb 2025 |
| 45 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2024 |
| 46 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Feb 2025 |
| 47 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 48 | Bray-Conn Resources, LLC | Wichita Falls, TX 76307 | Oil Operator | Dec 2011 |
| 49 | Brayton Operating Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Sep 2009 |
| 50 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 51 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 52 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2025 |
| 53 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Feb 2025 |
| 54 | Bruington Operating, L.L.C. | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2015 |
| 55 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Feb 2025 |
| 56 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Feb 2025 |
| 57 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Feb 2025 |
| 58 | Camden Oil & Gas, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Dec 2005 |
| 59 | Camden Resources, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Apr 2008 |
| 60 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 61 | Camoil, Inc. | Columbus, TX 78934 | Oil & Gas Operator | Feb 2025 |
| 62 | Carter-Langham, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Feb 2025 |
| 63 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | Feb 2025 |
| 64 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 65 | Cavalry Resources LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2010 |
| 66 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 67 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Feb 2025 |
| 68 | Chemily Management Company | Cypress, TX 77429 | Oil & Gas Operator | Apr 2023 |
| 69 | Chevron Midcontinent, L.P. | Midland, TX 79706 | Oil & Gas Operator | Feb 2025 |
| 70 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Feb 2025 |
| 71 | Chief Operating Company | Houston, TX 77070 | Oil & Gas Operator | Feb 2004 |
| 72 | Christensen & Matthews | Houston, TX 77040 | Oil & Gas Operator | Feb 2025 |
| 73 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 74 | Cico Oil & Gas Company | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 75 | Cimarex Energy Co | Midland, TX 79706 | Oil & Gas Operator | Feb 2025 |
| 76 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Feb 2025 |
| 77 | Clipper Operating Co., Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jan 2000 |
| 78 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | Feb 2025 |
| 79 | Coastal Plains Energy Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2025 |
| 80 | Coastline Exploration, Inc. | Stafford, TX 77477 | Oil & Gas Operator | Feb 2025 |
| 81 | Coastline Operating, L.L.C. | Houston, TX 77027 | Oil & Gas Operator | Dec 2006 |
| 82 | Coates Energy Interests, LTD. | San Antonio, TX 78217 | Oil & Gas Operator | Aug 1997 |
| 83 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2025 |
| 84 | Colorado Bluebonnet Energy Corp. | Englewood, CO 80112 | Oil & Gas Operator | Feb 2001 |
| 85 | Common Resources L.L.C. | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 86 | ConocoPhillips Company | Midland, TX 79701 | Oil & Gas Operator | Feb 2025 |
| 87 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 88 | Continental Trend Resources, Inc | Oklahoma City, OK 73126 | Oil & Gas Operator | Feb 2025 |
| 89 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 90 | Cook Marshall Operating, Inc. | Austin, TX 78746 | Oil & Gas Operator | Mar 1995 |
| 91 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 92 | Cottonwood Resources, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2003 |
| 93 | Crest Resources & Expl. Corp. | Houston, TX 77079 | Oil & Gas Operator | Dec 1998 |
| 94 | Crest Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 95 | Crusader Resources LC | Sugar Land, TX 77479 | Oil Operator | Feb 2025 |
| 96 | Cwoc | Big Spring, TX 79721 | Oil & Gas Operator | Feb 2025 |
| 97 | Cxy Energy, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Nov 2000 |
| 98 | Cypress E & P Corporation | Leander, TX 78646 | Oil & Gas Operator | Sep 2016 |
| 99 | D J Production | Pasadena, TX 77502 | Oil & Gas Operator | Feb 2025 |
| 100 | Daniel Explorations Inc | Georgetown, TX 78627 | Oil & Gas Operator | Apr 2009 |