| 1801 | Ruff Drilling Company | Albany, TX 76430 | Oil & Gas Operator | Dec 2019 |
| 1802 | Ruff Oil Co. | Albany, TX 76430 | Oil Operator | Sep 2026 |
| 1803 | Ruffner Clair L III | Marion Center, PA 15759-7818 | Gas Operator | Dec 2025 |
| 1804 | Ruffner Petroleum Corp | Akron, OH 44308 | Oil & Gas Operator | Dec 2000 |
| 1805 | Ruh Oil Company | Collinsville, OK 74021 | Oil & Gas Operator | May 2026 |
| 1806 | Rumble Energy LLC | Skiatook, OK 74070 | Oil & Gas Operator | Sep 2026 |
| 1807 | Rumley Robert A & Associates | Tulsa, OK 74135-1907 | Oil Operator | Jun 2026 |
| 1808 | Rumsey, Travis J. | Van Etten, NY 14889 | Gas Operator | Dec 2025 |
| 1809 | Runion Oil, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 2003 |
| 1810 | Running Foxes Petroleum Inc. | Centennial, CO 80112 | Oil & Gas Operator | Apr 2026 |
| 1811 | Running Horse Production Co. | Ignacio, CO 81137 | Gas Operator | Jun 2016 |
| 1812 | Running WP Oil, LLC | Loving, TX 76460 | Oil Operator | Sep 2026 |
| 1813 | Rupe Oil Company Inc | Wichita, KS 67278 | Oil & Gas Operator | Apr 2026 |
| 1814 | Rush Creek Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Sep 2026 |
| 1815 | Rush Oil & Gas C | | Oil Operator | Dec 1995 |
| 1816 | Rush, Charles Ray | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 1817 | Rush, Terry L. | Wakeeney, KS 67672 | Oil Operator | Apr 2026 |
| 1818 | Rush-Andrus Engineering | Royse City, TX 75189-1210 | Oil & Gas Operator | Feb 2022 |
| 1819 | Rushing Oil Co. | San Antonio, TX 78213 | Oil & Gas Operator | Sep 2026 |
| 1820 | Rushmore & Tresn | | Oil Operator | Jan 1995 |
| 1821 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 1822 | Rusk Energy Management, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 1823 | Rusk Energy Operating LLC | Houston, TX 77040 | Oil & Gas Operator | Sep 2026 |
| 1824 | Rusk Production Inc. | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2026 |
| 1825 | Ruskin H Meyer Et Al | | Oil Operator | Sep 1987 |
| 1826 | Russ Holden Well SVC | Sheffield, PA 16347-2904 | Oil & Gas Operator | Dec 2025 |
| 1827 | Russco Energy In | | Oil Operator | Jun 1994 |
| 1828 | Russco Energy, Inc. | Gladstone, MO 64118 | Oil Operator | Apr 2002 |
| 1829 | Russell - FT. Trinidad Op., LLC | Tyler, TX 75710 | Oil & Gas Operator | Sep 2026 |
| 1830 | Russell A. Flowers | | Oil Operator | May 1995 |
| 1831 | Russell Bros. Oil & Gas, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 1832 | Russell Brothers Oil & Gas | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2004 |
| 1833 | Russell Carl G | Coweta, OK 74429 | Oil & Gas Operator | Mar 2015 |
| 1834 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | May 2026 |
| 1835 | Russell E Snider LLC | Newark, OH 43055 | Oil Operator | Dec 2025 |
| 1836 | Russell Gas Co., LLC | Hugoton, KS 67451 | Gas Operator | Apr 2026 |
| 1837 | Russell James E | | Oil Operator | Apr 1994 |
| 1838 | Russell Oil Company | Haskell, OK 74436 | Oil & Gas Operator | Apr 2014 |
| 1839 | Russell Oil, Inc. | Edmond, OK 73083 | Oil Operator | Apr 2026 |
| 1840 | Russell Operating Company, LLC | Big Lake, TX 76932 | Oil Operator | Sep 2026 |
| 1841 | Russell Resources, Inc. | | Oil & Gas Operator | Dec 1998 |
| 1842 | Russell, C. M. Oil Company | Lubbock, TX 79423 | Oil & Gas Operator | Jan 2008 |
| 1843 | Russell, Gerald W. | Tulsa, OK 74103 | Oil Operator | Feb 1986 |
| 1844 | Russell, John R | | Oil Operator | Mar 2025 |
| 1845 | Russell, L. J. Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Sep 2026 |
| 1846 | Russell, Phillip | Colorado City, TX 79512 | Oil & Gas Operator | Sep 2026 |
| 1847 | Russell, T. Operating Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2005 |
| 1848 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Sep 2026 |
| 1849 | Rust Operating Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Feb 2000 |
| 1850 | Rustler Energy LLC | Lindsay, OK 73052 | Oil & Gas Operator | May 2026 |
| 1851 | Ruth Oil Co, LLC | Eunice, NM 88231 | Oil Operator | Mar 2015 |
| 1852 | Ruth Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2010 |
| 1853 | Ruthco Oil, LLC | Eunice, NM 88231 | Oil Operator | May 2008 |
| 1854 | Rutherford Oil Corporation | Houston, TX 77046 | Oil & Gas Operator | Jun 2019 |
| 1855 | Rutherford, Michael A. | Dallas, TX 75381 | Oil & Gas Operator | May 2000 |
| 1856 | Ruthson Energy, Inc. | Judson, TX 75660 | Oil Operator | Sep 2026 |
| 1857 | Rutledge, Kenny | Rising Star, TX 76471 | Oil & Gas Operator | Sep 2026 |
| 1858 | Rutledge, Rome | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1997 |
| 1859 | Rutledge-Newsom | Graham, TX 76450 | Oil Operator | Jun 2025 |
| 1860 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |
| 1861 | RV Borchert Oil Producer | | Oil & Gas Operator | Apr 2025 |
| 1862 | Rvo Petroleum Co. | | Oil & Gas Operator | Feb 1982 |
| 1863 | RVR Operating Co. | Bedford, TX 76021 | Oil & Gas Operator | Jan 2017 |
| 1864 | RW Oil & Gas LLC | Lamont, OK 74643 | Oil & Gas Operator | Jun 2026 |
| 1865 | RW Oil Co | Lovington, NM BAD ADDR | Oil Operator | Nov 1994 |
| 1866 | RW Operating Corp. | Midland, TX 79702 | Oil & Gas Operator | Jul 2016 |
| 1867 | Rwa Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 1999 |
| 1868 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Sep 2026 |
| 1869 | Rwit Company Inc | Tulsa, OK 74131-4255 | Oil & Gas Operator | Jul 2018 |
| 1870 | RWJ Operating LLC | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |
| 1871 | RWL Enterprises | | Oil & Gas Operator | Feb 2017 |
| 1872 | RWS Operating Co. LLC | Kilgore, TX 75663 | Oil Operator | Sep 2026 |
| 1873 | Ry-Co Petroleum | Wann, OK 74083 | Oil & Gas Operator | Feb 2017 |
| 1874 | Ryan Exploration, Inc. | | Oil & Gas Operator | Mar 2012 |
| 1875 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |
| 1876 | Ryan, Daniel J. | Oklahoma City, OK 73139 | Oil Operator | Sep 2003 |
| 1877 | Ryan, Joseph G. | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 1878 | Ryan, Kristen S. | Elma, NY 14059 | Gas Operator | Dec 2025 |
| 1879 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | Sep 2026 |
| 1880 | Ryca Energy Partners LLC | | Oil Operator | Nov 2024 |
| 1881 | Ryca Energy, LLC | | Oil & Gas Operator | Mar 2015 |
| 1882 | Ryder Scott Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 1883 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 1884 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Sep 2026 |
| 1885 | Rystin Oil & Gas | Sugar Land, TX 77487 | Oil & Gas Operator | Sep 2026 |