| 1901 | Spartan Resources LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2026 |
| 1902 | Spartan Royalties, LLC | | Oil Operator | Dec 2024 |
| 1903 | SPC Resources, LLC | Midland, TX 79701 | Oil & Gas Operator | Feb 2024 |
| 1904 | Spear Production Company, Inc. | Shreveport, LA 71161 | Oil Operator | Jul 2026 |
| 1905 | Spearco Oil | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |
| 1906 | Spearpoint Energy LLC | Seminole, OK 74818-1247 | Oil Operator | Jun 2015 |
| 1907 | Spears Terry | Osage, OK 74054 | Oil Operator | Mar 2026 |
| 1908 | Speartex Grain Company | Gruver, TX 79040 | Oil & Gas Operator | Jul 2026 |
| 1909 | Speartip Energy, LLC | Katy, TX 77450 | Oil Operator | Jul 2026 |
| 1910 | Specht Farms | Piqua, KS 66761 | Oil Operator | Nov 2009 |
| 1911 | Specht Oil | Iola, KS 66749 | Oil Operator | Mar 1998 |
| 1912 | Special Energy Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Jul 2026 |
| 1913 | Special JHR Corp | Bridgeville, PA 15017 | Oil & Gas Operator | Jul 2026 |
| 1914 | Specialized Technological Threading, Inc., | | Oil & Gas Operator | Oct 2019 |
| 1915 | Speckle Trout Operating LLC | Diboll, TX 75941 | Oil Operator | Jul 2026 |
| 1916 | Speco Oil Company | | Oil & Gas Operator | Feb 1980 |
| 1917 | Spectral Oil & Gas Corporation | Humble, TX 77338 | Oil Operator | Jul 2026 |
| 1918 | Spectrum Energy Inc | Scottsdale, AZ 85257 | Oil & Gas Operator | Oct 2003 |
| 1919 | Spectrum Field Services Inc | Tulsa, OK 74136-3400 | Oil & Gas Operator | Jan 2004 |
| 1920 | Spectrum Oil Company | Irving, TX 75063 | Oil & Gas Operator | May 2013 |
| 1921 | Spectrum Oil Corporation | Marietta, OH 45750 | Oil & Gas Operator | Dec 1993 |
| 1922 | Spectrum Opco LLC | | Oil & Gas Operator | Nov 2024 |
| 1923 | Speed James F | Ada, OK 74821-1221 | Oil & Gas Operator | Nov 2009 |
| 1924 | Speed, F. Michael, Trustee | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Aug 1998 |
| 1925 | Speedy Well Service | | Oil & Gas Operator | Mar 2026 |
| 1926 | Speegle Oil And Gas Company | Longview, TX 75605 | Oil & Gas Operator | Jul 2026 |
| 1927 | Speer Kenneth G | Seminole, OK 74818-1202 | Oil & Gas Operator | Dec 2001 |
| 1928 | Speir R M Operating Company | Walters, OK 73572-3933 | Oil Operator | Apr 2026 |
| 1929 | Spellbound Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2026 |
| 1930 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Apr 2026 |
| 1931 | Spence Energy Company | Dallas, TX 75360 | Oil & Gas Operator | Jul 2026 |
| 1932 | Spence, Ralph Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Jun 2023 |
| 1933 | Spencer Enterprises Dba Hugh Spencer | Smithburg, WV 26436-0000 | Oil & Gas Operator | Dec 2021 |
| 1934 | Spencer Oil Company | Borger, TX 79007 | Oil & Gas Operator | Apr 2026 |
| 1935 | Spencer Oil Company LLC | Bartlesville, OK 74006 | Oil Operator | Jan 2015 |
| 1936 | Spencer Petroleum Corp | Akron, OH 44319 | Oil & Gas Operator | Dec 2000 |
| 1937 | Spencer Resources Inc | Richmond, VA 23225 | Oil & Gas Operator | Dec 1993 |
| 1938 | Spencer-Cloughly Investments Inc | San Marcos, TX 78666 | Oil & Gas Operator | Aug 2002 |
| 1939 | Spenergy Corp. | Midland, TX 79701 | Oil & Gas Operator | Dec 1999 |
| 1940 | Sperry R J | Dallas, TX 75254-8647 | Oil & Gas Operator | Aug 2013 |
| 1941 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | May 2026 |
| 1942 | Spess Oil Company, A General Partnership | Cleveland, OK 74020 | Oil & Gas Operator | Mar 2026 |
| 1943 | SPH Development, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2022 |
| 1944 | Spheric Petroleum Inc. | Pikesville, MD 21208 | Oil & Gas Operator | Nov 2006 |
| 1945 | Spi Operations LLC | Midland, TX 79710 | Oil & Gas Operator | Jan 2013 |
| 1946 | Spicer Oil Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2008 |
| 1947 | Spicewood Operating Company, LLC | Austin, TX 78746 | Oil & Gas Operator | Jul 2026 |
| 1948 | Spicy Daugx Operators Louisiana LLC | | Oil & Gas Operator | Nov 2024 |
| 1949 | Spike, David C. And Arlene M. | Bloomfield, NY 14469 | Gas Operator | Dec 2025 |
| 1950 | Spikes, Harry | Henrietta, TX 76365 | Oil & Gas Operator | Sep 2000 |
| 1951 | Spiller Oil & Gas Company | Jacksboro, TX 76458 | Oil Operator | Jul 2026 |
| 1952 | Spiller Operating Co., Inc. | Round Rock, TX 78665 | Oil & Gas Operator | May 2015 |
| 1953 | Spiller, H. G. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1993 |
| 1954 | Spiller, J. A. Company | Austin, TX 78735 | Oil & Gas Operator | Jan 2016 |
| 1955 | Spiller, J.A. | Austin, TX 78735 | Oil & Gas Operator | Jan 2016 |
| 1956 | Spiller, Joseph A. | Austin, TX 78746 | Oil & Gas Operator | Oct 1993 |
| 1957 | Spiller, Robert S. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1995 |
| 1958 | Spillers Petroleum, Inc. | | Gas Operator | Mar 2010 |
| 1959 | Spindletop Drilling Co. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2026 |
| 1960 | Spindletop Oil & | | Oil Operator | Jun 1993 |
| 1961 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2026 |
| 1962 | Spines Explorati | | Oil & Gas Operator | Dec 1990 |
| 1963 | Spinnaker Exploration Co.,L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Nov 2005 |
| 1964 | Spiral Energy Corp. | Midland, TX 79705 | Oil & Gas Operator | Dec 2019 |
| 1965 | Spire Asset Management LLC | Lafayette, CO 80026 | Oil & Gas Operator | May 2026 |
| 1966 | Spire Missouri Inc. | | Oil Operator | May 2022 |
| 1967 | Spire Oil Services LLC | | Oil & Gas Operator | Nov 2020 |
| 1968 | Spirit Energy Inc | Edmond, OK 73034 | Oil & Gas Operator | Apr 1999 |
| 1969 | Spirit Energy L.L.C. | Caddo Mills, TX 75135 | Oil & Gas Operator | Dec 2018 |
| 1970 | Spirit O&G Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Jul 2026 |
| 1971 | Spirit Petroleum Company | | Oil & Gas Operator | Apr 1999 |
| 1972 | Spitfire Energy Group LLC | Oklahoma City, OK 73114-7444 | Oil Operator | Apr 2023 |
| 1973 | Spitfire Partners, LLC | Dallas, TX 75225 | Oil Operator | Jul 2026 |
| 1974 | Spivey, R. L. | Olney, TX 76374 | Oil Operator | Jul 2005 |
| 1975 | Spivey, William | Hays, KS 67601 | Oil Operator | Jun 1993 |
| 1976 | Splawn & Splawn | Saint Louis, OK 74866-0098 | Oil & Gas Operator | Mar 2025 |
| 1977 | Splechter, Tim | Yates Center, KS 66783 | Oil Operator | Mar 2026 |
| 1978 | SPN Energy, LLC | Guston, KY 40142 | Gas Operator | Dec 2024 |
| 1979 | Spokane Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 1980 | Sponte Operating, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Jul 2026 |
| 1981 | Spoonemore Brothers | Spearman, TX 79081 | Oil & Gas Operator | Nov 2019 |
| 1982 | Spooner & Marlin Expl., Inc. | | Oil & Gas Operator | Mar 1990 |
| 1983 | Spooner Petroleum Company | | Oil & Gas Operator | May 2026 |
| 1984 | Spotted Hawk Development, LLC | | Oil & Gas Operator | May 2026 |
| 1985 | Spradco, Inc. | Towanda, KS 67144 | Oil Operator | Mar 2026 |
| 1986 | Spragins Ed S | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2026 |
| 1987 | Spragins, Ed | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2026 |
| 1988 | Sprague, Gary L. | Versailles, NY 14168 | Gas Operator | Dec 2025 |
| 1989 | Spri Oil & Gas, LLC | Houston, TX 77090 | Oil & Gas Operator | Mar 2020 |
| 1990 | Spring Creek Farm And Oil, LLC | Bixby, OK 74008 | Oil Operator | Jun 2025 |
| 1991 | Spring Industries Inc | Wellington, FL 33414 | Oil & Gas Operator | Dec 2016 |
| 1992 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | May 2026 |
| 1993 | Spring Resources, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2007 |
| 1994 | Spring Tide Petroleum Inc | Broken Arrow, OK 74011-6651 | Oil & Gas Operator | Oct 2025 |
| 1995 | Spring Tree Management LC | Abilene, TX 79604 | Oil Operator | May 2013 |
| 1996 | Spring Valley Development Co LLC | Centennial, CO 80014 | Oil & Gas Operator | Jan 2026 |
| 1997 | Spring Valley Oil & Gas Inc | Drummond, OK 73735 | Oil & Gas Operator | May 2026 |
| 1998 | Spring, Harry A. | Ardmore, OK 73401 | Oil Operator | Jul 2012 |
| 1999 | Springer Energy Company, LLC | Akron, OH 44313 | Oil & Gas Operator | Dec 2025 |
| 2000 | Springer, Lee A. | Independence, KS 67301 | Oil Operator | May 2014 |