| 1901 | Russell Bros. Oil & Gas, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 1902 | Russell Brothers Oil & Gas | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2004 |
| 1903 | Russell Carl G | Coweta, OK 74429 | Oil & Gas Operator | Mar 2015 |
| 1904 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Nov 2025 |
| 1905 | Russell E Snider LLC | Newark, OH 43055 | Oil Operator | Dec 2024 |
| 1906 | Russell Gas Co., LLC | Hugoton, KS 67451 | Gas Operator | Sep 2025 |
| 1907 | Russell James E | | Oil Operator | Apr 1994 |
| 1908 | Russell Oil And Gas Company | Weston, WV 26452-0000 | Gas Operator | Dec 2021 |
| 1909 | Russell Oil Company | Haskell, OK 74436 | Oil & Gas Operator | Apr 2014 |
| 1910 | Russell Oil, Inc. | Edmond, OK 73083 | Oil Operator | Sep 2025 |
| 1911 | Russell Operating Company, LLC | Big Lake, TX 76932 | Oil Operator | Feb 2026 |
| 1912 | Russell Resources, Inc. | | Oil & Gas Operator | Dec 1998 |
| 1913 | Russell, C. M. Oil Company | Lubbock, TX 79423 | Oil & Gas Operator | Jan 2008 |
| 1914 | Russell, Gerald W. | Tulsa, OK 74103 | Oil Operator | Feb 1986 |
| 1915 | Russell, John R | | Oil Operator | Mar 2025 |
| 1916 | Russell, L. J. Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Feb 2026 |
| 1917 | Russell, Phillip | Colorado City, TX 79512 | Oil & Gas Operator | Feb 2026 |
| 1918 | Russell, T. Operating Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2005 |
| 1919 | Russlynn Properties LLC | Roswell, NM 882014207 | Oil & Gas Operator | May 2011 |
| 1920 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Feb 2026 |
| 1921 | Rust Operating Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Feb 2000 |
| 1922 | Rustler Energy LLC | Lindsay, OK 73052 | Oil & Gas Operator | Oct 2025 |
| 1923 | Ruth Oil Co, LLC | Eunice, NM 88231 | Oil Operator | Mar 2015 |
| 1924 | Ruth Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2010 |
| 1925 | Ruth* Ula Pearl | | Oil & Gas Operator | Sep 2019 |
| 1926 | Ruthco Oil, LLC | Eunice, NM 88231 | Oil Operator | May 2008 |
| 1927 | Rutherford Oil Corporation | Houston, TX 77046 | Oil & Gas Operator | Jun 2019 |
| 1928 | Rutherford, Michael A. | Dallas, TX 75381 | Oil & Gas Operator | May 2000 |
| 1929 | Ruthson Energy, Inc. | Judson, TX 75660 | Oil Operator | Feb 2026 |
| 1930 | Rutledge, Kenny | Rising Star, TX 76471 | Oil & Gas Operator | Feb 2026 |
| 1931 | Rutledge, Rome | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1997 |
| 1932 | Rutledge-Newsom | Graham, TX 76450 | Oil Operator | Jun 2025 |
| 1933 | Rutta, Jim | Columbus, TX 78934 | Oil & Gas Operator | Dec 1995 |
| 1934 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |
| 1935 | RV Borchert Oil Producer | | Oil & Gas Operator | Dec 2024 |
| 1936 | Rvo Petroleum Co. | | Oil & Gas Operator | Feb 1982 |
| 1937 | RVR Operating Co. | Bedford, TX 76021 | Oil & Gas Operator | Jan 2017 |
| 1938 | RW Oil & Gas LLC | Lamont, OK 74643 | Oil & Gas Operator | Nov 2025 |
| 1939 | RW Oil Co | Lovington, NM BAD ADDR | Oil Operator | Nov 1994 |
| 1940 | RW Operating Corp. | Midland, TX 79702 | Oil & Gas Operator | Jul 2016 |
| 1941 | Rwa Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 1999 |
| 1942 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Feb 2026 |
| 1943 | Rwit Company Inc | Tulsa, OK 74131-4255 | Oil & Gas Operator | Jul 2018 |
| 1944 | RWJ Operating LLC | Dallas, TX 75201 | Oil & Gas Operator | Feb 2026 |
| 1945 | RWL Enterprises | | Oil & Gas Operator | Feb 2017 |
| 1946 | RWS Operating Co. LLC | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 1947 | Ry-Co Petroleum | Wann, OK 74083 | Oil & Gas Operator | Feb 2017 |
| 1948 | Ryan Exploration, Inc. | | Oil & Gas Operator | Mar 2012 |
| 1949 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |
| 1950 | Ryan Petroleum Operating Inc | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | May 1999 |
| 1951 | Ryan, Daniel J. | Oklahoma City, OK 73139 | Oil Operator | Sep 2003 |
| 1952 | Ryan, Joseph G. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 1953 | Ryan, Kristen S. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 1954 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | Feb 2026 |
| 1955 | Ryca Energy Partners LLC | | Oil Operator | Nov 2024 |
| 1956 | Ryca Energy, LLC | | Oil & Gas Operator | Mar 2015 |
| 1957 | Ryder Scott Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 1958 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 1959 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Feb 2026 |
| 1960 | Rystin Oil & Gas | Sugar Land, TX 77487 | Oil & Gas Operator | Feb 2026 |