| 1 | 1776 Energy Operators, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2026 |
| 2 | Ace Drilling Services, Inc. | | Oil & Gas Operator | Sep 1987 |
| 3 | Addie, James & John Thornton | | Oil & Gas Operator | Dec 2024 |
| 4 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Mar 2026 |
| 5 | Apollo Petroleum Corporation | | Oil & Gas Operator | Dec 2012 |
| 6 | Arkla Energy Resources | Shreveport, LA 71151 | Oil & Gas Operator | Mar 2015 |
| 7 | B. G. Denton | | Oil & Gas Operator | Dec 2023 |
| 8 | B. J. Long | | Oil & Gas Operator | Nov 1989 |
| 9 | Black Bayou Management Co Inc. | | Oil & Gas Operator | Aug 1980 |
| 10 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2026 |
| 11 | Celeron Oil & Gas Company | | Oil & Gas Operator | Dec 1987 |
| 12 | Channel Exploration Company | | Oil & Gas Operator | Feb 1997 |
| 13 | Comstock Oil & Gas--La, LLC | | Oil & Gas Operator | Dec 2024 |
| 14 | D & T Company | | Oil & Gas Operator | Jun 1983 |
| 15 | D. A. Milton | | Oil & Gas Operator | Dec 2016 |
| 16 | Day Dreams Resources, LLC | | Oil & Gas Operator | Dec 2025 |
| 17 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2026 |
| 18 | Devon SFS Operating Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2008 |
| 19 | E. Conway Butts, Inc. | | Oil & Gas Operator | Apr 1991 |
| 20 | Ensight Energy Management, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2005 |
| 21 | Fair Oil, LC | Tyler, TX 75710 | Oil & Gas Operator | Oct 2001 |
| 22 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Jun 2026 |
| 23 | Frank Spooner | | Oil & Gas Operator | Mar 1984 |
| 24 | Gas Transportation Corporation | | Oil & Gas Operator | Aug 1995 |
| 25 | Genmar Oil & Gas, Inc. | | Oil & Gas Operator | May 1986 |
| 26 | Haddox Petroleum Corp | | Gas Operator | Dec 2010 |
| 27 | Harvey Broyles | | Oil & Gas Operator | May 2012 |
| 28 | Harvey Broyles, Et Al | | Gas Operator | Nov 1985 |
| 29 | Hogan Drilling Company, Inc. | | Oil & Gas Operator | Mar 1981 |
| 30 | Hogan Exploration, Inc. | | Oil & Gas Operator | Mar 2000 |
| 31 | Houston Oil & Minerals Corp. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 32 | Jackie D Nelson | | Oil & Gas Operator | Sep 1983 |
| 33 | James C. Storm | | Gas Operator | Oct 1991 |
| 34 | James Drilling Co., Inc. | | Oil & Gas Operator | Dec 2024 |
| 35 | Jim V. Haddox | | Gas Operator | Dec 2010 |
| 36 | John O. Clay Exploration, Inc. | | Oil & Gas Operator | Apr 2005 |
| 37 | JSB, LLC | | Oil & Gas Operator | Dec 2024 |
| 38 | Justiss Oil Company, Inc. | Jena, LA 71342 | Oil & Gas Operator | Feb 2026 |
| 39 | Justiss-Mears Oil Co. | | Oil & Gas Operator | Feb 1981 |
| 40 | Keystone Exploration, Inc | College Sta, TX 77845 | Oil & Gas Operator | Jun 2026 |
| 41 | Kmi Continental Off. Prod. Co. | | Oil & Gas Operator | Jan 1988 |
| 42 | L. R. Resources II | | Oil & Gas Operator | Feb 1991 |
| 43 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |
| 44 | Lyons Petroleum, Inc. | | Oil & Gas Operator | Oct 1988 |
| 45 | M. W. Maxwell | | Oil & Gas Operator | Apr 1990 |
| 46 | Mark V Petroleum Company | | Oil & Gas Operator | Feb 2020 |
| 47 | Marlin Exploration, Inc. | | Oil & Gas Operator | Oct 2006 |
| 48 | MBM Partnership | | Gas Operator | Nov 1991 |
| 49 | McRae Exploration, Inc. | | Oil & Gas Operator | Mar 1984 |
| 50 | Mid South Oil & Gas Expl Inc | | Oil & Gas Operator | Jan 1992 |
| 51 | Miles Oil & Gas Co. | | Oil & Gas Operator | Feb 1988 |
| 52 | Osr Oil & Gas Corp | Midland, TX 79710 | Oil & Gas Operator | Dec 2024 |
| 53 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2026 |
| 54 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jun 2026 |
| 55 | Primary Energy Co. | | Gas Operator | Jul 1999 |
| 56 | Quiet Sun Investments, Inc. | | Oil & Gas Operator | Sep 2012 |
| 57 | Ransom Horne,Jr. | | Oil & Gas Operator | Dec 1991 |
| 58 | Riley Exploration, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Jun 2026 |
| 59 | Rosamond Drilling Co., Inc. | | Gas Operator | Nov 1984 |
| 60 | Samson Contour Energy E&P, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2017 |
| 61 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 62 | Santa Fe Snyder Corporation | Houston, TX 77024 | Oil & Gas Operator | Oct 2000 |
| 63 | Saye Petroleum, Inc. | | Oil & Gas Operator | Apr 1995 |
| 64 | Shell Oil Company | Houston, TX 77210 | Oil & Gas Operator | Apr 2015 |
| 65 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 66 | Slapco - Emerald Exploration | | Gas Operator | Sep 1979 |
| 67 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 68 | South La. Production Co., Inc. | | Oil & Gas Operator | Jun 1982 |
| 69 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 70 | Spirit Petroleum Company | | Oil & Gas Operator | Apr 1999 |
| 71 | Spooner Petroleum Company | | Oil & Gas Operator | Mar 2026 |
| 72 | Stenco | | Oil & Gas Operator | Apr 1994 |
| 73 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 74 | Texas Gas Transmission Corp. | | Oil Operator | Aug 2003 |
| 75 | Texas Gas Transmission, LLC | Owensboro, KY 42301 | Oil & Gas Operator | Dec 2024 |
| 76 | The Maurice L. Brown Company | | Oil & Gas Operator | Aug 1987 |
| 77 | Thomas Turman | | Oil & Gas Operator | Dec 1991 |
| 78 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 79 | Trichel Contracting Company | | Oil & Gas Operator | Sep 1987 |
| 80 | Trident Oil & Gas Corp. | | Oil & Gas Operator | Sep 2000 |
| 81 | Vista Investments | | Gas Operator | Nov 1998 |
| 82 | Wayne J. Spears | | Oil & Gas Operator | Sep 2005 |
| 83 | Wicker Oil Co | | Oil & Gas Operator | Feb 1992 |
| 84 | Witt Oil Production, Inc. | | Oil & Gas Operator | Nov 1984 |
| 85 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Jun 2026 |