| 101 | Gas Resources, Inc. | Southern Pine, NC 28387 | Oil & Gas Operator | Mar 2004 |
| 102 | Gas Resources, Limited | | Oil & Gas Operator | Dec 2024 |
| 103 | Gas Transportation Corporation | | Oil & Gas Operator | Aug 1995 |
| 104 | Gator Hawk Gas Co. | | Gas Operator | Dec 2024 |
| 105 | Gedco Oil & Gas, Inc. | | Gas Operator | May 1992 |
| 106 | Getty Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 107 | Glenda Petroleum Corp. | | Gas Operator | Oct 1991 |
| 108 | Godfrey & Riley | | Gas Operator | May 1988 |
| 109 | Goldsberry Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Aug 2020 |
| 110 | Grand Operating, Inc. | Addison, TX 75001 | Oil & Gas Operator | Oct 2025 |
| 111 | Greystone Oil & Gas, LLP | Houston, TX 77057 | Oil & Gas Operator | Dec 2015 |
| 112 | H. & H. Development Co. | | Gas Operator | Aug 2019 |
| 113 | H. E. Sutton | | Oil & Gas Operator | Jan 1990 |
| 114 | H. L. McKee & J. P. McKee Jr. | | Gas Operator | Mar 2023 |
| 115 | H. Proler-Luffey Gas Corp. | | Gas Operator | Apr 1979 |
| 116 | Haddox Petroleum Corp | | Gas Operator | Dec 2010 |
| 117 | Hargraves Production, LLC | | Oil Operator | Jan 2025 |
| 118 | Hawkins Oil & Gas Inc | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2016 |
| 119 | Herbst Resources, Inc. | Mandeville, LA 70448 | Oil & Gas Operator | Aug 2003 |
| 120 | Herd Producing Company, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2025 |
| 121 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 122 | Homer D. Oliver | | Gas Operator | Sep 1998 |
| 123 | Hootkins-Smith,La LTD. | | Gas Operator | Jun 1985 |
| 124 | Inabnet Est., H. Inabnet, Agt. | | Gas Operator | Jul 2005 |
| 125 | Inactive Operator | | Oil Operator | Dec 1982 |
| 126 | Indian Exploration, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Dec 2025 |
| 127 | Investment Trends Corp. | | Gas Operator | Mar 1988 |
| 128 | J. E. Farrell | | Gas Operator | Nov 1990 |
| 129 | J. H. Wilkins | | Gas Operator | Dec 2024 |
| 130 | J.R.W. Oil & Gas | | Gas Operator | Sep 2021 |
| 131 | Jae Exploration & Development | | Oil & Gas Operator | Sep 1993 |
| 132 | James A. Noe Et Al | | Gas Operator | Nov 1996 |
| 133 | James Exploration, Inc. | | Gas Operator | Feb 1999 |
| 134 | Jan-Mar Oil Company Inc. | | Oil & Gas Operator | Jan 2025 |
| 135 | JCB II Enterprises LLC | Perryton, TX 79070 | Oil & Gas Operator | Jun 2023 |
| 136 | Jim V. Haddox | | Gas Operator | Dec 2010 |
| 137 | Joe G. Strahan | | Gas Operator | Oct 1983 |
| 138 | John H. McCarter, Jr. | | Gas Operator | Nov 1990 |
| 139 | John P. Castleman, Jr. | | Oil & Gas Operator | Nov 2020 |
| 140 | K. D. Lankford, Jr & L&N DRLG Co | | Gas Operator | Dec 2010 |
| 141 | K. D. Lankford, Jr., Et Al | | Gas Operator | Dec 2010 |
| 142 | Kaiser Oil (U.S.) LTD. | | Oil & Gas Operator | Apr 1983 |
| 143 | Kelley Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 144 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Oct 2025 |
| 145 | Kerr-McGee Oil & Gas Corp. | Houston, TX 77251 | Oil & Gas Operator | Sep 2006 |
| 146 | Kewanee Oil Company | Houston, TX 77001 | Oil & Gas Operator | Aug 1978 |
| 147 | Keystone Productions, LLC | | Gas Operator | Dec 2024 |
| 148 | Kilco, Inc. | | Gas Operator | Sep 1996 |
| 149 | L P C Energy, Inc. | | Oil & Gas Operator | Mar 1985 |
| 150 | L&N DRLG Co&K.D. Lankford, Jr | | Gas Operator | Aug 2006 |
| 151 | L'Oil Operating & Management Co., Inc. | | Oil & Gas Operator | Nov 2024 |
| 152 | L'Oil Operating And MGMT. Co. | | Oil & Gas Operator | Dec 2008 |
| 153 | L. D. McMullan | | Oil Operator | Jun 2023 |
| 154 | L. E. Hester | | Gas Operator | Oct 2004 |
| 155 | L. R. Resources II | | Oil & Gas Operator | Feb 1991 |
| 156 | La. Fete Oil & Gas, Inc. | | Oil & Gas Operator | May 1995 |
| 157 | La. Gas Production, L.C. | | Gas Operator | Sep 2018 |
| 158 | La. Land & Expl. Co. | | Oil & Gas Operator | Dec 2010 |
| 159 | Lahoma Gas Company | | Gas Operator | Dec 1980 |
| 160 | Lankford & Nance | | Gas Operator | Dec 2010 |
| 161 | Laster Welding And Well Serv, Inc. | | Gas Operator | Jul 2020 |
| 162 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 163 | Lear Gas Transmission | | Oil Operator | Aug 1989 |
| 164 | Lear Petroleum Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 165 | Legacy Energy, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 166 | Linville Natural Gas Co. Inc. | | Gas Operator | Sep 2000 |
| 167 | Long Oil & Natural Gas Corp. | | Oil & Gas Operator | Feb 1996 |
| 168 | Lotter Gas Co., Inc. | | Gas Operator | Apr 2009 |
| 169 | Louisiana Crude Oil&Gas Co Inc | | Oil & Gas Operator | Mar 1984 |
| 170 | Louisiana Gas Production Co | | Gas Operator | Dec 1996 |
| 171 | Louisiana Operating Co., Inc. | | Oil & Gas Operator | Aug 1994 |
| 172 | Luffey Gas Corp. | | Gas Operator | Dec 2008 |
| 173 | Luffey Gas Corp.-Graff | | Gas Operator | Oct 1994 |
| 174 | Luffey-Stinson Gas Corporation | | Gas Operator | Sep 2018 |
| 175 | M & M Drilling And Development | | Gas Operator | Dec 1988 |
| 176 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2025 |
| 177 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
| 178 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Oct 2025 |
| 179 | Mark V Petroleum Company | | Oil & Gas Operator | Feb 2020 |
| 180 | Mass Resources, Inc. | | Oil Operator | Jan 2025 |
| 181 | McConathy Production Co.,Inc. | | Oil & Gas Operator | Jun 1990 |
| 182 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 183 | McMullan Oil Company | San Antonio, TX 78212 | Oil & Gas Operator | Jun 2023 |
| 184 | McRae Exploration, Inc. | | Oil & Gas Operator | Mar 1984 |
| 185 | McRae Exploration, Inc. & Herd | | Oil & Gas Operator | Mar 1984 |
| 186 | McRae Oil Corporation | | Oil & Gas Operator | Mar 1984 |
| 187 | Mid Louisiana Gas Company | | Oil & Gas Operator | Oct 2002 |
| 188 | Midroc Operating Company | | Oil & Gas Operator | Apr 2013 |
| 189 | Midway Production Co. | | Gas Operator | May 1990 |
| 190 | Minatome Corpora | | Oil & Gas Operator | Sep 1987 |
| 191 | Mineral Ventures, Inc. | | Oil & Gas Operator | Dec 2024 |
| 192 | Miss Chub LLC | | Gas Operator | Dec 2024 |
| 193 | Mobley Oil Company, Inc. | | Oil & Gas Operator | Feb 1990 |
| 194 | Monroe Gas Associates-1 | | Gas Operator | Mar 2000 |
| 195 | Monroe Gas Joint Venture | | Gas Operator | Sep 2011 |
| 196 | Morgan Enterprises | | Oil & Gas Operator | Aug 1997 |
| 197 | N. W. Corporation | | Gas Operator | Jan 1989 |
| 198 | Nadel & Gussman-Jetta Oper. Co. | | Oil & Gas Operator | Mar 2012 |
| 199 | Navarro Gas Production Company | | Gas Operator | Dec 1996 |
| 200 | Nemours Corporation | | Gas Operator | Jan 1986 |