| 1901 | Brea Oil Company Inc. | | Oil & Gas Operator | Oct 2001 |
| 1902 | Breakthrough Ventures, LLC | | Oil Operator | Jun 2024 |
| 1903 | Brecca Oil & Gas Operators, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Mar 2003 |
| 1904 | Brecheisen Oil C | | Oil & Gas Operator | Sep 1993 |
| 1905 | Brechtel Energy Corporation | | Oil & Gas Operator | Sep 2008 |
| 1906 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2024 |
| 1907 | Breeden Oil | Albany, TX 76430 | Oil & Gas Operator | Apr 2002 |
| 1908 | Breeze Oil, LLC | Nocona, TX 76255 | Oil Operator | Nov 2024 |
| 1909 | Breeze Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1993 |
| 1910 | Breeze, James R. | Nocona, TX 76255 | Oil & Gas Operator | Nov 2017 |
| 1911 | Brehm Asset Management, LLC | Frisco, TX 75035 | Oil Operator | Apr 2024 |
| 1912 | Brehm Exploration, Inc. | | Oil & Gas Operator | Mar 1995 |
| 1913 | Brehm Investment Group Inc | | Oil Operator | Jul 1991 |
| 1914 | Brehm Oil | MT. Vernon, IL 62864 | Oil Operator | Jan 1986 |
| 1915 | Breitburn | | Oil & Gas Operator | Aug 2024 |
| 1916 | Breitburn Energy Company LLC | Lakewood, CO 80227 | Oil Operator | Aug 2011 |
| 1917 | Breitburn Florida, LLC | | Oil & Gas Operator | Aug 2024 |
| 1918 | Breitburn Operating Limited Partnership | | Oil & Gas Operator | Aug 2022 |
| 1919 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 1920 | Breitenbach Family Farms LLC | Bonner Springs, KS 66012 | Oil & Gas Operator | May 2020 |
| 1921 | Breitling Operating Corporation | Dallas, TX 75201 | Oil & Gas Operator | Aug 2016 |
| 1922 | Breland, Leon | | Oil & Gas Operator | Feb 1991 |
| 1923 | Brenda Oil And Gas Company | Pleasant PLNS, AR 72568 | Oil & Gas Operator | May 2006 |
| 1924 | Brenham Drilling Co. | Brenham, TX 77833 | Oil & Gas Operator | Nov 2024 |
| 1925 | Brennco Gas Transmission, Inc. | Overland Park, KS 66282 | Gas Operator | Apr 2009 |
| 1926 | Brenneis Energy | Duncan, OK 73533-5415 | Oil & Gas Operator | Jul 2024 |
| 1927 | Brenneis Oil Company | Norman, OK 73072-3963 | Oil & Gas Operator | Aug 2012 |
| 1928 | Brent Baker Oil And Gas Inc | Oklahoma City, OK 73149-2932 | Oil & Gas Operator | Sep 2024 |
| 1929 | Brent Boggs Oil & Gas LLC | Ivydale, WV 25113 | Oil & Gas Operator | Nov 2021 |
| 1930 | Brent Exploration | | Oil & Gas Operator | Dec 1993 |
| 1931 | Brent Exploration Inc. | | Oil & Gas Operator | Apr 1983 |
| 1932 | Bretagne, G P | Beattyville, KY 41311 | Oil & Gas Operator | Dec 2022 |
| 1933 | Bretagne, LLC | Beattyville, , K 41311 | Oil Operator | Dec 2021 |
| 1934 | Breton Sound Holdings, LLC | | Oil & Gas Operator | May 2024 |
| 1935 | Brewer Carroll L | Edmond, OK 73003-0010 | Oil & Gas Operator | Aug 2024 |
| 1936 | Brewer Hazel R | Oologah, OK 74053-3540 | Oil & Gas Operator | Apr 2017 |
| 1937 | Brewer J E | Seminole, OK 74818-0863 | Oil & Gas Operator | Mar 2014 |
| 1938 | Brewer Natural Resources, LLC | Lexington, WV 40508 | Oil & Gas Operator | Dec 2020 |
| 1939 | Brewer Robert A And Karen A | | Oil Operator | Aug 2024 |
| 1940 | Brewer, Freddie P. | Paola, KS 66071 | Oil Operator | Nov 2003 |
| 1941 | Brewton And Martin | | Oil Operator | Dec 1997 |
| 1942 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2024 |
| 1943 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 1944 | BRG Petroleum LLC | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2024 |
| 1945 | BRG Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2020 |
| 1946 | BRG Production Company | Tulsa, OK 74136-6338 | Oil & Gas Operator | Sep 2024 |
| 1947 | Brian C. Register | | Oil & Gas Operator | Jun 2011 |
| 1948 | Brian Energy | Kilgore, TX 75663 | Oil & Gas Operator | May 2013 |
| 1949 | Brian Energy, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2020 |
| 1950 | Briar Energy Corporation | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 1951 | Briar Hill Energy, Inc. | Harrisville, WV 26362 | Oil & Gas Operator | Dec 2021 |
| 1952 | Briar Hollow Energy Company | Portland, TX 78374 | Oil & Gas Operator | Nov 2024 |
| 1953 | Briar Oil & Gas - Oklahoma 1 LLC | Houston, TX 77027-9392 | Oil & Gas Operator | Sep 2024 |
| 1954 | Briarcreek Operating LLC | Graham, TX 76450 | Oil Operator | Nov 2024 |
| 1955 | Briarwood Energy Co | Akron, OH 43334 | Oil & Gas Operator | Dec 1996 |
| 1956 | Bricar Inc | Oklahoma City, OK 73108 | Oil & Gas Operator | Nov 1998 |
| 1957 | Brichacek Jerry Lee | Drumright, OK 74030-9777 | Oil & Gas Operator | Jan 2020 |
| 1958 | Brickley Enterprises, LLC | Eldorado, KS 67042 | Oil Operator | Jul 2024 |
| 1959 | Bricktown Energy LLC | Oklahoma City, OK 73112-5468 | Oil & Gas Operator | Sep 2024 |
| 1960 | Brico Oil, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 1961 | Bridas Energy USA, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Aug 2008 |
| 1962 | Bridge Energy LLC | | Oil & Gas Operator | Sep 2024 |
| 1963 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 1964 | Bridge Oil Development | San Antonio, TX 78209-1181-1181 | Oil & Gas Operator | Dec 1986 |
| 1965 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 1966 | Bridge Point Carson LLC | | Oil & Gas Operator | Sep 2024 |
| 1967 | Bridgecreek Resources (Colorado), LLC | Littleton, CO 80120 | Oil & Gas Operator | Sep 2024 |
| 1968 | Bridgeland Resources LLC | | Oil & Gas Operator | Aug 2024 |
| 1969 | Bridgemark Corporation | | Oil & Gas Operator | Aug 2024 |
| 1970 | Bridger Oil Inc. | Richmond, TX 77406 | Oil & Gas Operator | Nov 2024 |
| 1971 | Bridger Petroleum Corp | | Oil & Gas Operator | Oct 1999 |
| 1972 | Bridgers, Lindley | | Oil Operator | Nov 2012 |
| 1973 | Bridges Drilling | | Oil & Gas Operator | Jul 2024 |
| 1974 | Bridges Oil Co Etal | | Oil Operator | Dec 1996 |
| 1975 | Bridges, William S. Jr. | Wellsville, KS 66092 | Oil Operator | Jun 2024 |
| 1976 | Bridgestone/Firestone Inc | Akron, OH 44317 | Oil & Gas Operator | Dec 2022 |
| 1977 | Bridon Energy LLC | Yukon, OK 73099 | Oil & Gas Operator | Sep 2024 |
| 1978 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2024 |
| 1979 | Bridwell Oil Company, A General Partnership | Wichita Falls, TX 76307 | Oil Operator | Jul 2024 |
| 1980 | Bridwell Oil Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2024 |
| 1981 | Bridwell Oil MGMT Of Al, LLC | | Oil & Gas Operator | Apr 2006 |
| 1982 | Bridwell, Kayla & Gary | Independence, KS 67301 | Oil & Gas Operator | Dec 2009 |
| 1983 | Brier Oil LLC | Flatgap, KY 41219 | Oil Operator | Dec 2022 |
| 1984 | Brigadier Operating, LLC | Plano, TX 75024 | Oil & Gas Operator | Aug 2017 |
| 1985 | Brigco LLC | Lakin, KS 67860 | Gas Operator | Dec 2023 |
| 1986 | Briggs & Croker Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Nov 2024 |
| 1987 | Briggs Operating Company | | Oil & Gas Operator | Nov 1998 |
| 1988 | Briggs Properties, L.L.C. | | Oil Operator | Mar 2015 |
| 1989 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 1990 | Brigham Operating, LLC | Austin, TX 78730 | Oil & Gas Operator | Nov 2024 |
| 1991 | Brigham Resources Operating, LLC | Austin, TX 78730 | Oil & Gas Operator | Jun 2017 |
| 1992 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 1993 | Bright & Schiff | | Oil & Gas Operator | Dec 1977 |
| 1994 | Bright Hawk Operating Company | Spring, TX 77388 | Oil & Gas Operator | Nov 2024 |
| 1995 | Bright Horizon Resources LLC | Tulsa, OK 74136-4220 | Oil & Gas Operator | Sep 2016 |
| 1996 | Bright Horizon Texas LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2016 |
| 1997 | Bright Oil Company | Cumming, GA 30028 | Oil & Gas Operator | Nov 2024 |
| 1998 | Bright R E | Tulsa, OK 74116 | Oil & Gas Operator | Nov 2012 |
| 1999 | Bright Rock Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 2000 | Bright Well Oil & Gas Co | Armagh, PA 15920-0229 | Gas Operator | Dec 2023 |