| 1901 | B B & B Oil Co | Tulsa, OK 74114 | Oil & Gas Operator | Mar 2014 |
| 1902 | B B Energy Corp | Pequannock, NJ 07440 | Oil & Gas Operator | Dec 1994 |
| 1903 | B B R Oil Corporation | Norman, OK 73069 | Oil & Gas Operator | Feb 2025 |
| 1904 | B Bernard Lankford | Weatherford, TX 76086 | Oil & Gas Operator | Sep 1994 |
| 1905 | B C & D Oil & Gas Corp. | Hobbs, NM 88241 | Oil & Gas Operator | May 2025 |
| 1906 | B D Deans LLC | | Oil & Gas Operator | May 2009 |
| 1907 | B D K Oil Company | | Oil & Gas Operator | Aug 2000 |
| 1908 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 1909 | B E C Oil Compan | | Oil Operator | May 1986 |
| 1910 | B E Enterprises, Inc | | Oil Operator | Dec 2024 |
| 1911 | B F Energies LLC | West Newton, PA 15089-1357 | Gas Operator | Dec 2024 |
| 1912 | B H & C Operating Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 1913 | B H & T Oil Company Inc | Purcell, OK 73080-3010 | Oil & Gas Operator | Dec 2000 |
| 1914 | B H R Petroleum Inc | | Oil & Gas Operator | Apr 2006 |
| 1915 | B J Inc | Crossville, TN 38555 | Oil & Gas Operator | Dec 1984 |
| 1916 | B J Oil Company | Corsicana, TX 75109 | Oil & Gas Operator | May 2025 |
| 1917 | B J Resources, L.L.C. | Athens, TX 75751 | Oil & Gas Operator | May 2025 |
| 1918 | B K Energy, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Oct 2006 |
| 1919 | B K L Incorporated | Morton, TX 79346 | Oil & Gas Operator | Jun 2002 |
| 1920 | B L Oil And Gas | Loco Hills, NM 88255 | Oil & Gas Operator | Aug 2010 |
| 1921 | B L S W Pleasure Corp., Inc | | Oil Operator | Mar 1990 |
| 1922 | B M & S Oil | | Oil Operator | Apr 1986 |
| 1923 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 1924 | B M Oil, Inc. | | Oil & Gas Operator | May 2019 |
| 1925 | B P Energy | | Oil & Gas Operator | Apr 2015 |
| 1926 | B P Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Nov 2007 |
| 1927 | B R Polk Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2025 |
| 1928 | B R Smith Disposal Co | | Oil & Gas Operator | Jun 2021 |
| 1929 | B S &B Oil & Gas | | Oil Operator | Dec 1992 |
| 1930 | B&B Oil Rental Tools, Inc. | | Oil Operator | Sep 1994 |
| 1931 | B&E Exploration, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2009 |
| 1932 | B&L Exploration, L.L.C. | Metairie, LA 70001 | Oil & Gas Operator | May 2025 |
| 1933 | B&L Operating Co. | Price, TX 75687 | Oil & Gas Operator | May 2025 |
| 1934 | B&L Resources, L.L.C. | Metairie, LA 70001 | Oil & Gas Operator | May 2025 |
| 1935 | B-3 Oil Co. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 1936 | B-B Production | Ira, TX 79527 | Oil & Gas Operator | May 2025 |
| 1937 | B-C Steel, LLC | Yates Center, KS 66783 | Oil & Gas Operator | Nov 2015 |
| 1938 | B-F Oil Co. L.L.C. | Great Bend, KS 67530 | Oil Operator | Jan 2025 |
| 1939 | B-J Enterprises Inc | McAlester, OK 74501-7335 | Oil & Gas Operator | Apr 2014 |
| 1940 | B-J Of Ohio Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1997 |
| 1941 | B-J Operating Company | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 1942 | B-Jaks Oil Production | Lubbock, TX 79413 | Oil Operator | Mar 2008 |
| 1943 | B-K Operating | Whitesboro, TX 76273 | Oil & Gas Operator | Oct 1997 |
| 1944 | B-Mac Oil Co. | | Oil Operator | Sep 2002 |
| 1945 | B-P Ent. | Arlington, TX 76015 | Oil Operator | Jul 1996 |
| 1946 | B-T Oil Field Supply, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Jul 2002 |
| 1947 | B-Tech. Pet., Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2005 |
| 1948 | B-W Oil | Cisco, TX 76437 | Oil & Gas Operator | May 2025 |
| 1949 | B. & L. Oil Company | Seguin, TX 78155 | Oil & Gas Operator | May 2025 |
| 1950 | B. & M. Family Oil Company | Midland, TX 79708 | Oil & Gas Operator | Jan 1999 |
| 1951 | B. A. Hardey, Jr. | | Oil Operator | Mar 1984 |
| 1952 | B. B. & C. | Big Spring, TX 79720 | Oil Operator | May 2025 |
| 1953 | B. D. & D. Co. | | Gas Operator | Dec 1992 |
| 1954 | B. D. Evans Oil Co. | | Oil & Gas Operator | Jun 2017 |
| 1955 | B. E. Conway Energy Inc. | | Oil & Gas Operator | Mar 2025 |
| 1956 | B. G. Denton | | Oil & Gas Operator | Dec 2023 |
| 1957 | B. H. T. Production, LLC | | Oil & Gas Operator | Apr 2010 |
| 1958 | B. J. Long | | Oil & Gas Operator | Nov 1989 |
| 1959 | B. J. P. Operating | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 1960 | B. L. Ainsworth | | Oil Operator | Dec 1988 |
| 1961 | B. L. G. Company | | Gas Operator | Nov 1989 |
| 1962 | B. M. Hester | | Oil & Gas Operator | Mar 1993 |
| 1963 | B. M. J. Oil Venture | Luling, TX 78648 | Oil & Gas Operator | Jun 2005 |
| 1964 | B. V. Well Services, LLC | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 1965 | B. W. P., Inc. | Diboll, TX 75941 | Oil & Gas Operator | Mar 2015 |
| 1966 | B.A.C.O.C., Inc. | Bryan, TX 77802 | Oil & Gas Operator | May 1997 |
| 1967 | B.A.R. Treating Service, Inc. | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 1968 | B.E.G. Production | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 1969 | B.N.B. Production | Corpus Chrsti, TX 78403 | Oil & Gas Operator | May 1993 |
| 1970 | B.N.B. Production Inc. | Austin, TX 78720 | Oil & Gas Operator | May 1996 |
| 1971 | B.O. Oil Company | Houston, TX 77089 | Oil & Gas Operator | May 2025 |
| 1972 | B.O.L.D. Oil And Gas, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 1973 | B.P. Oil Company | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 1974 | B.P. Productions Inc. | Victoria, TX 77904 | Oil & Gas Operator | May 2025 |
| 1975 | B.R.H. Investments, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 1998 |
| 1976 | B.W.O.C., Inc. | Plano, TX 75026 | Oil & Gas Operator | May 2025 |
| 1977 | B2J, L.L.C. | Lovington, NM 88260 | Oil Operator | Mar 2025 |
| 1978 | B5 Holdings LLC | | Oil Operator | Mar 2025 |
| 1979 | B5 Operating, LLC | Wellington, KS 67152 | Oil & Gas Operator | Jan 2025 |
| 1980 | B8 Investments | | Oil Operator | Jan 2025 |
| 1981 | Baay Oil LLC | Akron, OH 44333 | Oil & Gas Operator | Dec 2024 |
| 1982 | Babcock & Brown Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 2007 |
| 1983 | Babcock Ronald W | Newark, OH 43055 | Oil & Gas Operator | Dec 2019 |
| 1984 | Babcock, Dorothy | Clymer, NY 14724 | Gas Operator | Dec 2023 |
| 1985 | Baber Oil & Gas LLC | Guymon, OK 73942 | Oil Operator | Mar 2025 |
| 1986 | Baber Oil Co., LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 1987 | Baber Well Servicing Co. | Hobbs, NM 88240 | Oil & Gas Operator | May 1995 |
| 1988 | Baber, Bill M. | Petrolia, TX 76377 | Oil & Gas Operator | May 2025 |
| 1989 | Baby Oil, Inc. | | Oil & Gas Operator | Oct 2017 |
| 1990 | Baca Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2000 |
| 1991 | Baccarat Oil LTD | Denver, CO 80223 | Oil Operator | Jan 2001 |
| 1992 | Bach Energy Corporation | | Oil & Gas Operator | Jul 1992 |
| 1993 | Bach Oil Production | | Oil Operator | Jan 2025 |
| 1994 | Bachman Resources Group Inc. | | Oil Operator | Nov 2024 |
| 1995 | Bachtell Oil & Gas, LTD. | Longview, TX 75605 | Oil & Gas Operator | May 2025 |
| 1996 | Bachtell, Charles Ray | Longview, TX 75605 | Oil & Gas Operator | Feb 2004 |
| 1997 | Back, Neville | McLean, TX 79057 | Gas Operator | Jan 1999 |
| 1998 | Backa LLC | Arkansas City, KS 67005 | Oil Operator | Jan 2025 |
| 1999 | Backus & Lanford | | Oil Operator | Aug 1985 |
| 2000 | Backus,Barnwell& Von Gonten | | Oil & Gas Operator | Oct 1984 |