| 1901 | Bratco Inc | Dewey, OK 74029-0279 | Oil & Gas Operator | Apr 2025 |
| 1902 | Bratco Operating Company | Dewey, OK 74029 | Oil & Gas Operator | May 2025 |
| 1903 | Bratton Energy | Danville, OH 43014 | Oil & Gas Operator | Dec 2024 |
| 1904 | Braun, John | Victoria, KS 67671 | Oil Operator | Oct 2019 |
| 1905 | Braun, John R | | Oil Operator | Feb 2025 |
| 1906 | Bravo Arkoma LLC | Tulsa, OK 74103-3100 | Oil & Gas Operator | Apr 2025 |
| 1907 | Bravo Natural Gas, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2012 |
| 1908 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 1909 | Bravo Operating Company | Hobbs, NM 88241 | Oil & Gas Operator | Dec 1995 |
| 1910 | Brawand H William | Wilcox, PA 15870-0373 | Oil & Gas Operator | Dec 2024 |
| 1911 | Brawley Petroleum Corporation | Lubbock, TX 79424 | Gas Operator | Aug 2017 |
| 1912 | Braxton Oil And Gas Corp. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2021 |
| 1913 | Bray Drilling Co., Inc. | | Oil Operator | Feb 1982 |
| 1914 | Bray-Conn Resources, LLC | Wichita Falls, TX 76307 | Oil Operator | Dec 2011 |
| 1915 | Brayton Oil Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 1916 | Brayton Operating Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Sep 2009 |
| 1917 | Brayton-Hodges Petroleum Inc. | | Oil & Gas Operator | May 2025 |
| 1918 | Brazos Geological Consulting LT | College Sta, TX 77840 | Oil Operator | Jul 2025 |
| 1919 | Brazos Oil Co. | Corpus Chrsti, TX 78418 | Oil & Gas Operator | Feb 2008 |
| 1920 | Brazos Operating LLC | Midland, TX 79710 | Gas Operator | Jul 2025 |
| 1921 | Brazos Petroleum | | Oil & Gas Operator | Aug 1995 |
| 1922 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 1923 | Brazos Resources, Inc. | College Sta, TX 77840 | Oil & Gas Operator | Dec 1998 |
| 1924 | Brazos River Exploration LLC | Houston, TX 77008 | Oil & Gas Operator | Oct 2024 |
| 1925 | Brazos River LLC | | Oil & Gas Operator | Apr 2002 |
| 1926 | Brazos Valley Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Jul 2025 |
| 1927 | Brbco, LLC | | Oil & Gas Operator | Dec 2024 |
| 1928 | BRC Operating Company LLC | Dallas, TX 75201 | Oil & Gas Operator | Jul 2025 |
| 1929 | Brchan Ventures LLC | Bartlesville, OK 74006-0281 | Oil Operator | Dec 2021 |
| 1930 | Brea Canon Oil Co. | | Oil & Gas Operator | May 2025 |
| 1931 | Brea Oil Company Inc. | | Oil & Gas Operator | Oct 2001 |
| 1932 | Breakthrough Ventures, LLC | | Oil Operator | Jan 2025 |
| 1933 | Brecca Oil & Gas Operators, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Mar 2003 |
| 1934 | Brecheisen & Lor | | Oil & Gas Operator | Oct 1995 |
| 1935 | Brecheisen & Spooner | Garnett, KS 66032 | Gas Operator | Aug 2009 |
| 1936 | Brecheisen Oil C | | Oil & Gas Operator | Sep 1993 |
| 1937 | Brechtel Energy Corporation | | Oil & Gas Operator | Sep 2008 |
| 1938 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 1939 | Breeden Oil | Albany, TX 76430 | Oil & Gas Operator | Apr 2002 |
| 1940 | Breeze Oil, LLC | Nocona, TX 76255 | Oil Operator | Jul 2025 |
| 1941 | Breeze Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1993 |
| 1942 | Breeze, James R. | Nocona, TX 76255 | Oil & Gas Operator | Nov 2017 |
| 1943 | Brehm Asset Management, LLC | Frisco, TX 75035 | Oil Operator | Mar 2025 |
| 1944 | Brehm Exploration, Inc. | | Oil & Gas Operator | Mar 1995 |
| 1945 | Brehm Investment Group Inc | | Oil Operator | Jul 1991 |
| 1946 | Brehm Oil | MT. Vernon, IL 62864 | Oil Operator | Jan 1986 |
| 1947 | Breitburn | | Oil & Gas Operator | Sep 2024 |
| 1948 | Breitburn Energy Company LLC | Lakewood, CO 80227 | Oil Operator | Aug 2011 |
| 1949 | Breitburn Florida, LLC | | Oil & Gas Operator | Dec 2024 |
| 1950 | Breitburn Operating Limited Partnership | | Oil & Gas Operator | Aug 2022 |
| 1951 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 1952 | Breitenbach Family Farms LLC | Bonner Springs, KS 66012 | Oil & Gas Operator | May 2020 |
| 1953 | Breitling Operating Corporation | Dallas, TX 75201 | Oil & Gas Operator | Aug 2016 |
| 1954 | Breland, Leon | | Oil & Gas Operator | Feb 1991 |
| 1955 | Brenda Oil And Gas Company | Pleasant PLNS, AR 72568 | Oil & Gas Operator | May 2006 |
| 1956 | Brenham Drilling Co. | Flatonia, TX 78941 | Oil & Gas Operator | Jul 2025 |
| 1957 | Brennco Gas Transmission, Inc. | Overland Park, KS 66282 | Gas Operator | Apr 2009 |
| 1958 | Brenneis Energy | Duncan, OK 73533-5415 | Oil & Gas Operator | Mar 2025 |
| 1959 | Brenneis Oil Company | Norman, OK 73072-3963 | Oil & Gas Operator | Aug 2012 |
| 1960 | Brent Baker Oil And Gas Inc | Oklahoma City, OK 73149-2932 | Oil & Gas Operator | May 2025 |
| 1961 | Brent Boggs Oil & Gas LLC | Ivydale, WV 25113 | Oil & Gas Operator | Nov 2021 |
| 1962 | Brent Exploration | | Oil & Gas Operator | Dec 1993 |
| 1963 | Brent Exploration Inc. | | Oil & Gas Operator | Apr 1983 |
| 1964 | Brent Smith Services Inc | Ringling, OK 73456 | Oil & Gas Operator | Apr 2025 |
| 1965 | Bretagne, G P | Beattyville, KY 41311 | Oil & Gas Operator | Dec 2023 |
| 1966 | Bretagne, LLC | Beattyville, , K 41311 | Oil Operator | Dec 2023 |
| 1967 | Breton Sound Holdings, LLC | | Oil & Gas Operator | Dec 2024 |
| 1968 | Brewer Carroll L | Edmond, OK 73003-0010 | Oil & Gas Operator | Apr 2025 |
| 1969 | Brewer Hazel R | Oologah, OK 74053-3540 | Oil & Gas Operator | Apr 2017 |
| 1970 | Brewer J E | Seminole, OK 74818-0863 | Oil & Gas Operator | Mar 2014 |
| 1971 | Brewer Natural Resources, LLC | Lexington, WV 40508 | Oil & Gas Operator | Dec 2020 |
| 1972 | Brewer Robert A And Karen A | | Oil Operator | Jun 2025 |
| 1973 | Brewer, Freddie P. | Paola, KS 66071 | Oil Operator | Nov 2003 |
| 1974 | Brewton And Martin | | Oil Operator | Dec 1997 |
| 1975 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 1976 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 1977 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 1978 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 1979 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | May 2025 |
| 1980 | Brian C. Register | | Oil & Gas Operator | Jun 2011 |
| 1981 | Brian Energy | Kilgore, TX 75663 | Oil & Gas Operator | May 2013 |
| 1982 | Brian Energy, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2020 |
| 1983 | Briar Energy Corporation | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 1984 | Briar Hill Energy, Inc. | Harrisville, WV 26362 | Oil & Gas Operator | Dec 2021 |
| 1985 | Briar Hollow Energy Company | Portland, TX 78374 | Oil & Gas Operator | Jul 2025 |
| 1986 | Briar Oil & Gas - Oklahoma 1 LLC | Houston, TX 77027-9392 | Oil & Gas Operator | Apr 2025 |
| 1987 | Briarcreek Operating LLC | Graham, TX 76450 | Oil Operator | Jul 2025 |
| 1988 | Briarwood Energy Co | Akron, OH 43334 | Oil & Gas Operator | Dec 1996 |
| 1989 | Bricar Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Nov 1998 |
| 1990 | Brichacek Jerry Lee | Drumright, OK 74030-9777 | Oil & Gas Operator | Jan 2020 |
| 1991 | Brickley Enterprises, LLC | Eldorado, KS 67042 | Oil Operator | Mar 2025 |
| 1992 | Bricktown Energy LLC | Oklahoma City, OK 73112-5468 | Oil & Gas Operator | Mar 2025 |
| 1993 | Brico Oil, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2025 |
| 1994 | Bridas Energy USA, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Aug 2008 |
| 1995 | Bridge Energy LLC | | Oil & Gas Operator | May 2025 |
| 1996 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 1997 | Bridge Oil Development | San Antonio, TX 78209-1181 | Oil & Gas Operator | Dec 1986 |
| 1998 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 1999 | Bridge Point Carson LLC | | Oil & Gas Operator | May 2025 |
| 2000 | Bridgecreek Resources (Colorado), LLC | Littleton, CO 80120 | Oil & Gas Operator | May 2025 |