| 101 | BCM Energy Louisiana LLC | | Oil Operator | May 2014 |
| 102 | BCM Energy Operating LLC | Lafayette, LA 70503 | Oil Operator | Jun 2015 |
| 103 | Beach-Hollenshead TSTG & SVCS Inc. | | Oil Operator | Jan 2004 |
| 104 | Beacon Petroleum Corporation | | Oil & Gas Operator | Jan 1992 |
| 105 | Bean Energy, Inc. | | Oil & Gas Operator | Dec 1986 |
| 106 | Bean Resources, Inc. | | Oil & Gas Operator | Aug 2006 |
| 107 | Bear Creek Env. Systems, LLC | | Oil Operator | Dec 2008 |
| 108 | Bear Creek Services, LLC | | Oil Operator | Dec 2024 |
| 109 | Bear Minerals LLC | Dallas, TX 75214 | Oil Operator | Jan 2025 |
| 110 | Beard And Ganey | | Oil & Gas Operator | Oct 1986 |
| 111 | Beard Oil Company | Oklahoma City, OK 73102 | Oil & Gas Operator | Aug 2013 |
| 112 | Beau Coup Oil& Gas Corporation | | Oil & Gas Operator | Feb 1986 |
| 113 | Beauregard Production Co Inc | | Oil Operator | Dec 2014 |
| 114 | Beavers' Production | | Oil Operator | May 1997 |
| 115 | Bech Oil & Gas, Inc. | | Oil & Gas Operator | Mar 1994 |
| 116 | Bechtel Energy PTNR LTD PRTNRS | | Oil & Gas Operator | Jan 1996 |
| 117 | Bechtel Energy Resources Corp. | Houston, TX 77210 | Oil & Gas Operator | Jun 1996 |
| 118 | Beck Oil Company | | Oil Operator | Sep 1996 |
| 119 | Beck Oil Inc | | Oil & Gas Operator | Jan 2025 |
| 120 | Beebe And Beebe | | Oil & Gas Operator | Jun 2000 |
| 121 | Beem Oil & Gas Company | | Oil & Gas Operator | Dec 1994 |
| 122 | Bel Oil Corporation | Jenks, OK 74037 | Oil & Gas Operator | Jun 2005 |
| 123 | Bel Oil Corporation, Etal | | Oil & Gas Operator | May 1987 |
| 124 | Belco Development Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 1994 |
| 125 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 126 | Belco Operating Corp. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 127 | Belco Petroleum Corp | Grand Junction, CO | Oil & Gas Operator | Dec 1983 |
| 128 | Belden & Blake Corporation | North Canton, OH 44720-0500-0500 | Oil & Gas Operator | Dec 2016 |
| 129 | Belle Exploration, Inc. | | Oil & Gas Operator | Jun 2021 |
| 130 | Belle Oil, Inc. | | Oil & Gas Operator | Mar 2025 |
| 131 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 132 | Belnorth Petroleum Corporation | Midland, TX 79701 | Oil & Gas Operator | Feb 1991 |
| 133 | Ben Carroll | | Oil Operator | Dec 1985 |
| 134 | Bengal Oil & Gas, Inc. | | Gas Operator | Mar 2006 |
| 135 | Benton Oil & Gas Company Of La | | Oil & Gas Operator | Apr 1997 |
| 136 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 137 | Bering Operating Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | May 2001 |
| 138 | Berkshire Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 139 | Bert & Glen Loe | | Oil Operator | Jul 1979 |
| 140 | Bert Fields, Jr. | | Oil & Gas Operator | Nov 1986 |
| 141 | Beta Oil Inc | | Oil Operator | Feb 1986 |
| 142 | Beta Operating, Inc | | Oil & Gas Operator | May 2001 |
| 143 | Bethlan Production Corporation | | Oil & Gas Operator | Dec 1994 |
| 144 | Betsy Production Company, Inc. | Magnolia, AR 71753 | Oil & Gas Operator | Mar 2025 |
| 145 | Beusa Energy, Inc. | Spring, TX 77380 | Oil & Gas Operator | Apr 2011 |
| 146 | Beusa Energy, LLC | | Oil & Gas Operator | Nov 2017 |
| 147 | Bev Exploration, Inc. | | Oil Operator | Jun 1985 |
| 148 | BHB Oil, Inc | | Oil & Gas Operator | Dec 2024 |
| 149 | BHP Billiton Petro (KCS Resources), LLC | | Oil & Gas Operator | Jul 2019 |
| 150 | BHP Billiton Petro (Txla Operating) Co. | | Gas Operator | Jul 2019 |
| 151 | BHP Billiton Petro (WSF Operating), Inc. | | Oil & Gas Operator | Jul 2019 |
| 152 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 153 | BHP Petroleum Company Inc | Houston, TX 77057 | Oil & Gas Operator | Jun 2016 |
| 154 | BHP Petroleum, Inc. | | Oil & Gas Operator | Aug 1985 |
| 155 | Biedenharn Et Al | | Gas Operator | Nov 1996 |
| 156 | Big Creek Operating, Inc. | | Oil & Gas Operator | Jan 1991 |
| 157 | Big G Exploration, Inc. | | Oil Operator | Mar 1988 |
| 158 | Big Island Operating Corp. | | Oil & Gas Operator | Aug 1988 |
| 159 | Big Joe Operating Company, Inc. | | Oil & Gas Operator | May 2017 |
| 160 | Big M Oil Company | | Oil & Gas Operator | Jan 2025 |
| 161 | Big Pine Petroleum Inc. | | Oil & Gas Operator | Dec 2024 |
| 162 | Big River Oil Field Services, LLC | | Oil Operator | Mar 2017 |
| 163 | Big Run Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 164 | Bigfoot Energy Services LLC | Carthage, TX 75633 | Oil & Gas Operator | Aug 2024 |
| 165 | Biggs Resources, Inc. | | Oil Operator | Apr 1984 |
| 166 | Biglane Operating Company | | Oil & Gas Operator | Mar 2025 |
| 167 | Bike Oil & Gas Company, Inc. | | Oil & Gas Operator | Aug 2002 |
| 168 | Bileta Corporation | | Oil & Gas Operator | Aug 2010 |
| 169 | Bill Foster | | Oil Operator | Dec 2024 |
| 170 | Bill Gary | | Gas Operator | Jul 1995 |
| 171 | Bill Tarver | | Oil Operator | Nov 2004 |
| 172 | Billingsley Engineering Co. | | Oil & Gas Operator | May 1994 |
| 173 | Billy A. Poisso | | Oil & Gas Operator | Apr 2023 |
| 174 | Billy E. Bayles | | Oil & Gas Operator | Apr 1998 |
| 175 | Billy P. Bullock-Production | | Oil Operator | Jan 1991 |
| 176 | Billy Young | | Oil Operator | Aug 1989 |
| 177 | Bintliff Props. LTD. PRTNRSHP. | | Oil & Gas Operator | Dec 1987 |
| 178 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | Jun 2025 |
| 179 | Bison Energy Partners, LLC | | Oil & Gas Operator | Jan 2025 |
| 180 | BJT Properties Of Lasalle, LLC | | Oil Operator | Dec 2024 |
| 181 | Bke-A, L L C | | Oil & Gas Operator | Jun 1999 |
| 182 | Bke-Theall, LLC | | Oil & Gas Operator | Feb 2000 |
| 183 | BKV Ventures, LLC | | Oil & Gas Operator | Nov 2020 |
| 184 | Black Bayou Gas Processing, Inc. | | Oil Operator | Dec 2024 |
| 185 | Black Bayou Gas Systems, Inc. | | Oil Operator | Feb 2009 |
| 186 | Black Bayou Management Co Inc. | | Oil & Gas Operator | Aug 1980 |
| 187 | Black Bayou Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 188 | Black Bayou Petroleum | | Oil Operator | Jul 1999 |
| 189 | Black Bayou Resources, Inc. | | Oil & Gas Operator | Jun 1992 |
| 190 | Black Bear Midstream LLC | | Oil Operator | Jan 2025 |
| 191 | Black Diamond Energy, LLC | | Oil & Gas Operator | Oct 2008 |
| 192 | Black Diamond Production Co. | | Oil & Gas Operator | Mar 2021 |
| 193 | Black Elk Energy Offshore Operations LLC | | Oil & Gas Operator | Jun 2016 |
| 194 | Black Gold Production Company | | Oil & Gas Operator | Feb 1998 |
| 195 | Black Gold Resources LLC | Houston, TX 77056 | Oil Operator | Sep 2013 |
| 196 | Black Hawk Resources | | Oil & Gas Operator | Dec 1984 |
| 197 | Black Jack Oil Co Inc | Holliday, TX 76366 | Oil & Gas Operator | Feb 2025 |
| 198 | Black Pearl Exploration, L.L.C. | Houston, TX 77095 | Oil & Gas Operator | May 2015 |
| 199 | Black Pool Energy, LP | Houston, TX 77070 | Oil & Gas Operator | Jul 2024 |
| 200 | Black Stone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | Feb 1997 |