| 1 | A & C Gas Productions, Inc. | | Gas Operator | Mar 2012 |
| 2 | Annona Productions, Inc. | | Gas Operator | May 2019 |
| 3 | Arkla Energy Resources | Shreveport, LA 71151 | Oil & Gas Operator | Mar 2015 |
| 4 | Ascot Oils, Inc. | | Oil & Gas Operator | Jul 1993 |
| 5 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 6 | Ashland Oil, Inc | | Oil & Gas Operator | Dec 2023 |
| 7 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Jul 2026 |
| 8 | Bayou Drilling Fluids, Inc. | | Gas Operator | Jul 2020 |
| 9 | Bethlan Production Corporation | | Oil & Gas Operator | Dec 1994 |
| 10 | Bryant Oil & Gas Corporation | | Oil & Gas Operator | Mar 1987 |
| 11 | Calpetco-Herbst Expl. Inc. | | Gas Operator | Jan 1990 |
| 12 | Capital Gas, Inc. | | Gas Operator | Jan 1998 |
| 13 | Cargas Operating Company | | Oil & Gas Operator | Dec 2024 |
| 14 | Ceka Gas, Div Of GTC | | Oil & Gas Operator | May 1988 |
| 15 | Ciera Resources, Inc. | | Gas Operator | Nov 1998 |
| 16 | Clements-B & MCK - Luffey | | Gas Operator | Apr 1979 |
| 17 | Coho Louisiana Production Co | | Gas Operator | Dec 1998 |
| 18 | Commonwealth Energy, Inc. | Weston, WV 26452-0000 | Oil & Gas Operator | Dec 2021 |
| 19 | D-Ram Construction Co., Inc. | | Gas Operator | Dec 1990 |
| 20 | D. J. Simmons & Co. Of La. | | Gas Operator | Nov 1996 |
| 21 | Daleco Resources | | Gas Operator | Dec 2000 |
| 22 | David L. Whittington | | Gas Operator | Dec 1998 |
| 23 | David L. Whittington Inc | | Gas Operator | Sep 2022 |
| 24 | DCP Midstream, LLC | | Oil Operator | Jun 2016 |
| 25 | Delta Oil Corp | | Oil & Gas Operator | Dec 2005 |
| 26 | Drum Energy, L.L.C. | | Gas Operator | Dec 2016 |
| 27 | Duke Energy Field Services LLC | | Oil Operator | Dec 2006 |
| 28 | Enerco Exploration & MGMT. Co. | | Oil & Gas Operator | Aug 1981 |
| 29 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 30 | Enervest Production Partners, LTD. | | Gas Operator | Nov 2024 |
| 31 | Ensource Inc | Midland, TX 79705 | Oil & Gas Operator | Aug 1998 |
| 32 | Equitable Petroleum Corp. | | Oil & Gas Operator | Jan 1999 |
| 33 | Fifty Third Corp. & K.M.O.C. | | Gas Operator | Jul 1994 |
| 34 | Frankrich Operating Company | | Gas Operator | May 2007 |
| 35 | Gas Investments, Inc. | | Gas Operator | Dec 1982 |
| 36 | Gas Masters Of America, Inc. | | Oil & Gas Operator | Nov 2024 |
| 37 | Gas Resources, Inc. | Southern Pine, NC 28387 | Oil & Gas Operator | Mar 2004 |
| 38 | Gas Resources, Limited | | Oil & Gas Operator | Dec 2024 |
| 39 | Gas Transportation Corporation | | Oil & Gas Operator | Aug 1995 |
| 40 | Gedco Oil & Gas, Inc. | | Gas Operator | May 1992 |
| 41 | Georgia-Pacific Corp. | Atlanta, GA 30348 | Gas Operator | May 1986 |
| 42 | Glenda Petroleum Corp. | | Gas Operator | Oct 1991 |
| 43 | H. J. Bonner | | Oil & Gas Operator | Aug 1991 |
| 44 | Headington Oil Company | Dallas, TX 75231 | Oil & Gas Operator | Dec 2016 |
| 45 | Herbst Resources, Inc. | Mandeville, LA 70448 | Oil & Gas Operator | Aug 2003 |
| 46 | Homer D. Oliver | | Gas Operator | Sep 1998 |
| 47 | J. E. Farrell | | Gas Operator | Nov 1990 |
| 48 | J.R.W. Oil & Gas | | Gas Operator | Sep 2021 |
| 49 | Jae Exploration & Development | | Oil & Gas Operator | Sep 1993 |
| 50 | James A. Perry | | Gas Operator | Nov 2024 |
| 51 | Jimmy D Berry | | Gas Operator | Mar 1983 |
| 52 | Joe G. Strahan | | Gas Operator | Oct 1983 |
| 53 | K. D. Lankford, Jr & L&N DRLG Co | | Gas Operator | Dec 2010 |
| 54 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Feb 2026 |
| 55 | Keystone Fuel Oil Co | | Gas Operator | Nov 1997 |
| 56 | Keystone Productions, LLC | | Gas Operator | Dec 2024 |
| 57 | L L & H E Kidd | | Gas Operator | Sep 1990 |
| 58 | L. E. Hester | | Gas Operator | Oct 2004 |
| 59 | La. Fete Oil & Gas, Inc. | | Oil & Gas Operator | May 1995 |
| 60 | La.Gas Service Expl. Program | | Gas Operator | Dec 1989 |
| 61 | Laster Welding And Well Serv, Inc. | | Gas Operator | Jul 2020 |
| 62 | Lear Gas Transmission | | Oil Operator | Aug 1989 |
| 63 | Loe Oil & Gas Corporation | | Gas Operator | Dec 1977 |
| 64 | Lotter Gas Co., Inc. | | Gas Operator | Apr 2009 |
| 65 | Louisiana Crude Oil&Gas Co Inc | | Oil & Gas Operator | Mar 1984 |
| 66 | Louisiana Gas Production Co | | Gas Operator | Dec 1996 |
| 67 | Luffey Gas Corp. | | Gas Operator | Dec 2008 |
| 68 | Luffey-Stinson Gas Corporation | | Gas Operator | Sep 2018 |
| 69 | M & M Drilling And Development | | Gas Operator | Dec 1988 |
| 70 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | May 2026 |
| 71 | McElroy Drilling Co., Inc. | | Gas Operator | Dec 1987 |
| 72 | Melren Oil & Gas Expl., Inc. | | Gas Operator | Nov 1989 |
| 73 | Mid Louisiana Gas Company | | Oil & Gas Operator | Oct 2002 |
| 74 | Mississippi River Transm. Corp | | Oil & Gas Operator | Sep 2002 |
| 75 | Mississippi Ventures | | Gas Operator | Feb 1992 |
| 76 | MLGW | | Gas Operator | Sep 1984 |
| 77 | Monroe Gas Associates-1 | | Gas Operator | Mar 2000 |
| 78 | Navarro Gas Production Company | | Gas Operator | Dec 1996 |
| 79 | Nemours Corporation | | Gas Operator | Jan 1986 |
| 80 | Newhaven Operating Inc | | Oil & Gas Operator | Dec 1998 |
| 81 | Nip-N-Tuck Minerals, Inc. | | Gas Operator | Feb 1988 |
| 82 | Oliditt Corporation | | Gas Operator | Mar 2022 |
| 83 | Oliditt Production Inc. | | Gas Operator | Sep 1998 |
| 84 | Pacific Atlantic Oil Co. | | Oil & Gas Operator | Dec 2003 |
| 85 | Panenergy La Intrastate Co | | Oil Operator | Mar 2000 |
| 86 | Par Expl Co & Taurus Petroleum | | Gas Operator | Mar 1984 |
| 87 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 88 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 89 | Primos Production | | Oil & Gas Operator | Dec 2024 |
| 90 | Primos-Pennzoil JV | | Gas Operator | Feb 2005 |
| 91 | Red Rooster Gas Corporation | | Gas Operator | Sep 1993 |
| 92 | Relco Exploration Co., Inc. | | Gas Operator | Aug 1987 |
| 93 | Republic Gas Gathering Sys Inc | | Oil & Gas Operator | Nov 1981 |
| 94 | Richard T. Perry | | Gas Operator | May 1993 |
| 95 | River Energy Co., Inc. | | Gas Operator | Dec 2012 |
| 96 | Roy M. Teel | | Oil & Gas Operator | Nov 1983 |
| 97 | Saxon Oil & Gas Expl., Inc. | | Gas Operator | Nov 1989 |
| 98 | Segars Operating | | Gas Operator | Apr 2014 |
| 99 | Shiloh Creek Resources, Inc. | | Gas Operator | Nov 2024 |
| 100 | Southern Natural Gas Co | Houston, TX 77001 | Oil & Gas Operator | Dec 2011 |