| 101 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | Mar 2025 |
| 102 | Black Bayou Gas Processing, Inc. | | Oil Operator | Dec 2024 |
| 103 | Black Bayou Gas Systems, Inc. | | Oil Operator | Feb 2009 |
| 104 | Black Bayou Management Co Inc. | | Oil & Gas Operator | Aug 1980 |
| 105 | Black Bayou Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 106 | Black Bayou Petroleum | | Oil Operator | Jul 1999 |
| 107 | Black Bayou Resources, Inc. | | Oil & Gas Operator | Jun 1992 |
| 108 | Black Gold Resources LLC | Houston, TX 77056 | Oil Operator | Sep 2013 |
| 109 | Blanco Oil Co. | San Antonio, TX 78230 | Oil & Gas Operator | Feb 2004 |
| 110 | Blocker Exploration Company | | Oil & Gas Operator | Apr 1983 |
| 111 | Blue Creek Resources, Inc. | | Oil & Gas Operator | May 1990 |
| 112 | Blue Diamond Drilling, Inc. | | Oil Operator | Nov 1995 |
| 113 | Blue Dome Operating, LLC | Tulsa, OK 74119 | Gas Operator | Mar 2025 |
| 114 | Bo Luvan | | Oil & Gas Operator | Oct 2003 |
| 115 | Bob Sibley | | Oil & Gas Operator | Jan 2025 |
| 116 | Bobby G. Martin Oil & Gas Co. | | Oil Operator | Nov 1990 |
| 117 | Bobby R. Hale | | Oil Operator | Dec 1992 |
| 118 | Bonner & Carter | | Oil & Gas Operator | Sep 1988 |
| 119 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 120 | Bowie Operating Company, LLC | Graham, TX 76450 | Oil & Gas Operator | Mar 2011 |
| 121 | Boyter Brothers | | Oil Operator | Jul 1995 |
| 122 | BPX (KCS Resources), LLC | | Oil & Gas Operator | Feb 2022 |
| 123 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 124 | Brad Acree Pet. Consultants | | Oil & Gas Operator | Apr 1986 |
| 125 | Bradford Oil Company | Denver, CO 80249 | Oil & Gas Operator | Feb 2025 |
| 126 | Brammer Engineering, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2025 |
| 127 | Brasseaux Oil Company | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2008 |
| 128 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2024 |
| 129 | Bridges Drilling | | Oil & Gas Operator | Jan 2025 |
| 130 | Bridges Oil Co Etal | | Oil Operator | Dec 1996 |
| 131 | Briggs Properties, L.L.C. | | Oil Operator | Mar 2015 |
| 132 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 133 | Brooks And Lee | | Oil & Gas Operator | Dec 1994 |
| 134 | Brooks Oil Company | Kilgore, TX 75662 | Oil & Gas Operator | Mar 2025 |
| 135 | Brookston Energy, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2025 |
| 136 | Brown Operating & MGMT Corp. | | Oil & Gas Operator | Feb 1991 |
| 137 | Bruce H. Weaver & Sons | | Oil Operator | Jan 2025 |
| 138 | Bruce H. Weaver Prod. | | Oil Operator | Nov 1987 |
| 139 | Bruce N. Lynn | | Oil & Gas Operator | Sep 1994 |
| 140 | Brumar, Inc. | | Oil Operator | Dec 1995 |
| 141 | Brumley Prod. | | Oil & Gas Operator | Jun 2006 |
| 142 | Bruxoil Inc | | Oil & Gas Operator | Nov 2024 |
| 143 | Burnham & Browning DRLG Co. | | Oil Operator | Oct 1990 |
| 144 | Burns Oil & Gas Expl. | | Oil & Gas Operator | Jan 1985 |
| 145 | Byargeon & Sons Oil Co. | | Oil Operator | Nov 2000 |
| 146 | C & B Exploration Company, Inc. | | Oil & Gas Operator | Oct 2008 |
| 147 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | Mar 2025 |
| 148 | C & C Oil & Gas | Ranger, TX 76470 | Oil & Gas Operator | Mar 2025 |
| 149 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 150 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | Mar 2025 |
| 151 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2024 |
| 152 | C & N Royalties, L.L.C. | | Oil & Gas Operator | Oct 2015 |
| 153 | C & S Properties | | Oil & Gas Operator | Jun 1996 |
| 154 | C G Davis, Et Al | | Oil & Gas Operator | Mar 1986 |
| 155 | C. H. C. Gerard | | Oil & Gas Operator | Jan 2025 |
| 156 | C. J. Broome Oil Company | | Oil & Gas Operator | Jan 2020 |
| 157 | C. L. Morris | | Oil Operator | Feb 2004 |
| 158 | C. L. Morris, Inc. | | Oil & Gas Operator | Feb 2004 |
| 159 | C. M. Frizzell | | Oil & Gas Operator | Mar 2014 |
| 160 | C. W. Brumley | | Oil & Gas Operator | Jun 2006 |
| 161 | C. Wayland Brooks | | Oil & Gas Operator | Dec 1987 |
| 162 | C.J. Oil Company | Iowa Park, TX 76367 | Oil Operator | Jul 2024 |
| 163 | C.P.I. | | Oil & Gas Operator | Oct 2007 |
| 164 | Caddeaux Gathering, LLC | | Oil Operator | Dec 2024 |
| 165 | Caddo Gas Processing L.L.C. | | Oil Operator | Aug 2012 |
| 166 | Caddo Oil & Gas Co., Inc. | | Oil Operator | Jul 1990 |
| 167 | Caddo Oil Co.,Inc. | | Oil & Gas Operator | Apr 1987 |
| 168 | Caddo Parish Holdings LLC | | Oil & Gas Operator | Jul 2020 |
| 169 | Caddo Petroleum Dev., Inc. | | Oil Operator | Aug 1986 |
| 170 | Caddo Pine Island Corp. | | Oil & Gas Operator | Sep 1997 |
| 171 | Caddo Pine Island Operating Co | | Oil & Gas Operator | Aug 1998 |
| 172 | Caddo Resources Inc | | Oil & Gas Operator | Dec 1986 |
| 173 | Caddo Western Development, Inc | | Oil & Gas Operator | Aug 1984 |
| 174 | Cadillac Operating Company, LLC | | Oil Operator | Jan 2025 |
| 175 | Caldwell & Self | | Oil Operator | Dec 2024 |
| 176 | Caldwell & Trahan | | Oil Operator | Dec 2024 |
| 177 | Caldwell Oil Company | | Oil Operator | Jul 2012 |
| 178 | Caldwell Operating, L.L.C. | | Oil Operator | Dec 2024 |
| 179 | Caldwell Production | | Oil Operator | Dec 2024 |
| 180 | Caldwell-Bayou State | | Oil Operator | Dec 2024 |
| 181 | Calumet Lubricants Company | | Oil Operator | Dec 1993 |
| 182 | Calumet Refining Co. | | Oil Operator | May 1991 |
| 183 | Camar Exploration | | Oil Operator | Jan 1989 |
| 184 | Camco Resources, Inc. | | Oil Operator | Aug 1991 |
| 185 | Camterra Resources, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Mar 2025 |
| 186 | Cannon Operating Company LLC | Garland, TX 75043 | Oil Operator | Mar 2025 |
| 187 | Canstar Oil & Gas, Inc. | | Oil & Gas Operator | Dec 1994 |
| 188 | Cap Production | | Oil Operator | Dec 2024 |
| 189 | Carder Oil Company | | Oil & Gas Operator | Dec 2024 |
| 190 | Carter & Rorex | | Oil Operator | Dec 1991 |
| 191 | Caruthers Producing Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2019 |
| 192 | Cathey Oil, Inc. | | Oil & Gas Operator | Aug 2009 |
| 193 | Cecil Brand | | Oil & Gas Operator | Mar 2002 |
| 194 | Centerpoint Energy FLD Ser Inc | | Oil Operator | Feb 2011 |
| 195 | Century Energy, Inc. | | Oil & Gas Operator | Aug 1989 |
| 196 | Century Oil, Inc. | | Oil Operator | Apr 2022 |
| 197 | Chanse Energy Corporation | Shreveport, LA 71165-1572 | Oil & Gas Operator | Sep 2021 |
| 198 | Chaparral Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Dec 2009 |
| 199 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 200 | Chaparral Expl & C L Morris In | | Oil & Gas Operator | Nov 1994 |