| 1 | A J Ferguson | | Oil Operator | Apr 1988 |
| 2 | A. T. Teague, Jr. | | Oil Operator | Aug 1993 |
| 3 | Abco Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |
| 4 | Acadian Land & Expl., Inc. | | Oil & Gas Operator | May 1992 |
| 5 | Achilles Oil, LLC | | Oil & Gas Operator | Sep 2024 |
| 6 | Aldridge Operating Co., LLC | | Oil & Gas Operator | Aug 2019 |
| 7 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 8 | American Trading & Prod Corp | Houston, TX 77040-6471 | Oil & Gas Operator | Nov 2014 |
| 9 | Arbor Petroleum Corporation | Oklahoma City, OK 73102-4003 | Oil & Gas Operator | Mar 2011 |
| 10 | Arco O & G Co-Div Atl Rich Co | | Oil & Gas Operator | Feb 1994 |
| 11 | Arnold & Assoc-D&D-Coquina | | Oil Operator | Oct 1985 |
| 12 | Aspen Oil & Gas LLC | | Oil Operator | Jul 2014 |
| 13 | Atkins Production | | Oil Operator | Dec 2008 |
| 14 | Axis Onshore, LLC | | Oil & Gas Operator | Apr 2008 |
| 15 | Axis Onshore, LP | | Oil & Gas Operator | Dec 2010 |
| 16 | B & M Oilfield Service, Inc. | | Oil Operator | Mar 1999 |
| 17 | B & R Operating Service | | Oil Operator | Jan 1990 |
| 18 | Bay Gas, LLC | | Oil & Gas Operator | Oct 2024 |
| 19 | Beard And Ganey | | Oil & Gas Operator | Oct 1986 |
| 20 | Bech Oil & Gas, Inc. | | Oil & Gas Operator | Mar 1994 |
| 21 | Ben Carroll | | Oil Operator | Dec 1985 |
| 22 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 23 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 24 | Big Joe Operating Company, Inc. | | Oil & Gas Operator | May 2017 |
| 25 | Big Pine Petroleum Inc. | | Oil & Gas Operator | Jun 2024 |
| 26 | Big River Oil Field Services, LLC | | Oil Operator | Mar 2017 |
| 27 | Biglane Operating Company | | Oil & Gas Operator | Sep 2024 |
| 28 | Billingsley Engineering Co. | | Oil & Gas Operator | May 1994 |
| 29 | Billy P. Bullock-Production | | Oil Operator | Jan 1991 |
| 30 | Bob Bertolet | | Oil & Gas Operator | Dec 2001 |
| 31 | Bob Bertolet, J Dale IV,Munoco | | Oil Operator | Sep 1991 |
| 32 | Bradford Oil LLC | | Oil Operator | Jun 2024 |
| 33 | Brookwater Energy Services, LLC | | Oil & Gas Operator | Jun 2024 |
| 34 | Bud'S Pumping Service Inc. | | Oil Operator | Dec 1997 |
| 35 | C & F Oil Company, Inc. | | Oil Operator | Jun 2024 |
| 36 | C. A. Cardneaux, Inc. | | Oil & Gas Operator | Apr 1990 |
| 37 | C. L. Morris, Inc. | | Oil & Gas Operator | Feb 2004 |
| 38 | C.T.R. Oil, Inc. | | Oil & Gas Operator | Jun 2024 |
| 39 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | Dec 2024 |
| 40 | Campbell & Assoc.-Ring | | Oil Operator | Nov 1980 |
| 41 | Cardneaux Inc. | | Oil & Gas Operator | Aug 2009 |
| 42 | Castle Exploration Company Inc | Blue Bell, PA 19422 | Oil & Gas Operator | May 2018 |
| 43 | Cat-Oil Inc. | | Oil Operator | Nov 2015 |
| 44 | Charles M. Nolan | | Oil Operator | Aug 1984 |
| 45 | Chester Floyd | | Oil Operator | Feb 1996 |
| 46 | Chevron USA Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
| 47 | Christeve Oil Company, Inc. | Houston, TX 77068 | Oil & Gas Operator | Dec 2022 |
| 48 | Clarence F. Routon, Jr. | | Oil Operator | Apr 1990 |
| 49 | Clayton W. Williams, Jr. | | Oil & Gas Operator | Sep 1986 |
| 50 | Consolidated Energy Res., Inc. | | Oil Operator | Jun 1992 |
| 51 | Crystal Oil & Land Company | | Oil & Gas Operator | Apr 2002 |
| 52 | D & D Exploration Co. | | Oil & Gas Operator | Nov 1986 |
| 53 | D & J Producing Company | | Oil Operator | Sep 2006 |
| 54 | Dale Expl Co & R. A. Campbell | | Oil Operator | Nov 1995 |
| 55 | Dale Exploration Company | | Oil & Gas Operator | May 2004 |
| 56 | David New Operating Co., Inc. | | Oil & Gas Operator | Feb 1999 |
| 57 | Davis & Kaiser Operating, Inc. | | Oil Operator | May 2004 |
| 58 | Deblin Operating LTD | | Oil & Gas Operator | Jan 1997 |
| 59 | Decker & Associates | | Oil & Gas Operator | Mar 1991 |
| 60 | Delta Petroleum Corp Of Co | | Oil & Gas Operator | Oct 2010 |
| 61 | Devon Energy Production Company LP | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 62 | Dixie Operating Company | Spring, TX 77379 | Oil & Gas Operator | Dec 2002 |
| 63 | Domestic Oil Producers,Inc. | | Oil Operator | Oct 1998 |
| 64 | Duer Wagner & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1998 |
| 65 | El Toro Production Co., Inc. | | Oil & Gas Operator | Jan 2016 |
| 66 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 67 | Eram, Inc. | | Oil & Gas Operator | Jul 2024 |
| 68 | Est. Of H. L. Hunt | | Oil & Gas Operator | Jun 1983 |
| 69 | Ethyl Properties Inc. | | Oil & Gas Operator | Aug 1989 |
| 70 | Eurovest Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 71 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 72 | Fletcher Operating Co. | | Oil & Gas Operator | May 1989 |
| 73 | Four Rivers Exploration, Inc. | | Oil & Gas Operator | Sep 2002 |
| 74 | Fun Investments, L.L.C. | | Oil & Gas Operator | May 2024 |
| 75 | G M Piggott, Jr | | Oil & Gas Operator | Nov 1985 |
| 76 | Ganco, Inc. | | Oil Operator | Mar 2003 |
| 77 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 78 | Geodyne Resources Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2010 |
| 79 | George Barron | | Oil & Gas Operator | Jan 1998 |
| 80 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 81 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 82 | Gravtro, Inc. | | Oil Operator | Apr 1986 |
| 83 | Great West Energy & Expl., Inc. | Addison, TX 75001 | Oil & Gas Operator | Mar 2008 |
| 84 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2024 |
| 85 | Grigsby-McCord Joint Account | | Oil Operator | Apr 1984 |
| 86 | Grigsby-McCord Joint Acct Etal | | Oil Operator | Apr 1984 |
| 87 | Guernsey/Rosbottom | | Oil Operator | Apr 1989 |
| 88 | Gulf Oil Corp. | Denver, CO 80201-0599 | Oil & Gas Operator | Dec 2014 |
| 89 | H. & N. Operating Co., Inc. | | Oil & Gas Operator | Oct 1997 |
| 90 | H. A. Harper | | Oil Operator | Dec 1982 |
| 91 | Hansen Oil Corporation | Shreveport, LA 71106 | Oil Operator | Apr 2003 |
| 92 | Hassie Hunt Expl. Company | Dallas, TX 75201 | Oil & Gas Operator | Aug 2008 |
| 93 | Hogan Exploration, Inc. | | Oil & Gas Operator | Mar 2000 |
| 94 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 95 | Hughes & Hughes | | Oil & Gas Operator | May 1984 |
| 96 | Hughes & New-D. Braswell | | Oil & Gas Operator | Jun 1983 |
| 97 | Hughes Denny Offshore Expl Inc | | Oil & Gas Operator | Nov 1988 |
| 98 | Hughes Eastern Corporation | Ridgeland, MS 39157 | Oil & Gas Operator | Jul 2024 |
| 99 | Hughes Eastern Petroleum, LTD. | | Oil & Gas Operator | Jun 1986 |
| 100 | Hughes-Denny Petroleum Co.,Inc | | Oil & Gas Operator | Dec 1987 |