| 901 | Root W C | Kellyville, OK 74039 | Oil & Gas Operator | Jan 2021 |
| 902 | Rose Operating Company | Tulsa, OK 74101-2391 | Oil & Gas Operator | Dec 2014 |
| 903 | Rose Rock Resources Inc | Wagoner, OK 74467-8362 | Oil & Gas Operator | Dec 2024 |
| 904 | Roseland Oil & Gas Inc | Rockwall, TX 75087 | Oil & Gas Operator | Feb 2003 |
| 905 | Rover Operating, LLC | Chicago, IL 60606 | Oil & Gas Operator | Jan 2025 |
| 906 | Rowe Energy | Beggs, OK 74421-0240 | Oil & Gas Operator | Mar 2015 |
| 907 | Rowe Stephen Oil Properties LLC | Hunt, TX 78024 | Oil & Gas Operator | Apr 2020 |
| 908 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Jan 2025 |
| 909 | Roy G Oil Company | Drumright, OK 74030-1236 | Oil & Gas Operator | Oct 1995 |
| 910 | Roy L Ashton Oil & Gas Production Inc | Sapulpa, OK 74066 | Oil Operator | Dec 2024 |
| 911 | Royal Energy Resources LTD | Denver, CO 80221 | Oil & Gas Operator | May 2013 |
| 912 | Royal Oil & Gas Corp. | Indiana, PA 15701 | Oil & Gas Operator | Apr 2014 |
| 913 | Royalty Energy Development LLC | Edmond, OK 73003 | Oil & Gas Operator | Jan 2025 |
| 914 | Rozell Harold Dba Roundup Oil LLC | Springer, OK 73458 | Oil & Gas Operator | Jan 2025 |
| 915 | Rush Creek Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Mar 2025 |
| 916 | S & C Resources Inc | Cleveland, OK 74020 | Oil Operator | Dec 2024 |
| 917 | S & G Operating LLC | McLoud, OK 74851 | Oil & Gas Operator | Jan 2025 |
| 918 | S & S Energy | Englewood, CO 80112 | Oil & Gas Operator | Mar 2015 |
| 919 | S & S Oil & Gas Corporation | Okemah, OK 74859-0659 | Oil & Gas Operator | Sep 2014 |
| 920 | S T Industries Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2011 |
| 921 | Saiber Michael L & Lora L | Saxonburg, PA 16056 | Oil Operator | Mar 1997 |
| 922 | Sallee Oil Corporation | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2024 |
| 923 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 924 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
| 925 | Sand Boy Production Company | Bartlesville, OK 74003-9273 | Oil & Gas Operator | Sep 2024 |
| 926 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Dec 2024 |
| 927 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 928 | Scavenger Oil Co., Inc. | Englewood, CO 80111 | Oil & Gas Operator | Mar 2000 |
| 929 | Schad Jeffrey M | Mannford, OK 74044-0995 | Oil Operator | Sep 2021 |
| 930 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Mar 2025 |
| 931 | Schonfield Harold Gene | Bristow, OK 74010 | Oil Operator | Mar 2015 |
| 932 | Scissortail Energy LLC | Tulsa, OK 74137-3644 | Oil & Gas Operator | Feb 2015 |
| 933 | Scott Banes Scott Family Partnership | | Oil Operator | Dec 2024 |
| 934 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 935 | Seals Well Service | | Oil Operator | Jul 2001 |
| 936 | Selco Oil And Gas Inc | Alamo, CA 94507 | Oil & Gas Operator | Dec 2024 |
| 937 | Select Operating Company Inc | Dallas, TX 75225 | Oil & Gas Operator | Mar 2014 |
| 938 | Sellers Donald J | Depew, OK 74028-2442 | Oil Operator | Jan 2013 |
| 939 | Sellers Jack B Estate Of | Cleveland, OK 74020 | Oil & Gas Operator | Dec 2024 |
| 940 | Sellers Mark A | Drumright, OK 74030 | Oil & Gas Operator | Mar 2020 |
| 941 | Sensor Oil & Gas Inc | Duncan, OK 73534 | Oil & Gas Operator | May 2013 |
| 942 | Sentinel Transportation LLC | Wilmington, DE 19810 | Oil & Gas Operator | Jan 2025 |
| 943 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 944 | Setex Oil And Gas Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2012 |
| 945 | Seven J Oil Inc | Jenning, OK 74038-9729 | Oil & Gas Operator | Nov 2024 |
| 946 | Shadow-Del Oil Company | Kiefer, OK 74041-0453 | Oil & Gas Operator | Jul 2015 |
| 947 | Shallow Energy Inc | South Dennis, MA 2660 | Oil & Gas Operator | Apr 2024 |
| 948 | Shamrock Operating Company LLC | Cleveland, OK 74020 | Oil Operator | Aug 2022 |
| 949 | Shannon Corporation Inc | Okmulgee, OK 74447-1323 | Oil & Gas Operator | Mar 2015 |
| 950 | Shannon Petroleum Inc | Tulsa, OK 74136-4603 | Oil & Gas Operator | Oct 2016 |
| 951 | Shelton Alec & Glenda | Kiefer, OK 74041 | Oil & Gas Operator | Oct 2024 |
| 952 | Shelton Dempsey L | Glenpool, OK 74033 | Oil & Gas Operator | Dec 2018 |
| 953 | Shelton Dempsey W | Tulsa, OK 74119-4036 | Oil & Gas Operator | Mar 2015 |
| 954 | Shelton Oil Resources LLC | Tulsa, OK 74107-4874 | Oil & Gas Operator | Dec 2024 |
| 955 | Shelton Resources Inc | Tulsa, OK 74119-4036 | Oil & Gas Operator | Feb 2008 |
| 956 | Shepard James | Beggs, OK 74421 | Oil & Gas Operator | Feb 2024 |
| 957 | Sherrill Bob G | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2015 |
| 958 | Shideler Enterprises Inc | Drumright, OK 74030-1233 | Oil & Gas Operator | Feb 2019 |
| 959 | Shields VIrginia | Kellyville, OK 74039 | Oil & Gas Operator | Dec 2024 |
| 960 | Shields Well Service Corp | Stroud, OK 74079-3410 | Oil & Gas Operator | Dec 2017 |
| 961 | Shipman James E Dba Lazy J Oil Co | Hallett, OK 74034 | Oil Operator | Oct 2024 |
| 962 | Shofner Oil Company | Chushing,, OK 74023 | Oil & Gas Operator | Feb 2003 |
| 963 | Short Oil Co | Luling, TX 78648 | Oil & Gas Operator | Dec 2024 |
| 964 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 965 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 966 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Dec 2024 |
| 967 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Oct 2024 |
| 968 | Silverado Oil LTD | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2003 |
| 969 | Silvertin Farm Production LLC | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2020 |
| 970 | Simcoe Oil Company | Scottsdale, AZ 85258-2553 | Oil & Gas Operator | May 2020 |
| 971 | Siosi Oil & Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2013 |
| 972 | Sitco Inc | Yukon, OK 73099 | Oil & Gas Operator | Jul 1995 |
| 973 | Six "E" Trading Company | Henryetta, OK 74801 | Oil & Gas Operator | Sep 2020 |
| 974 | Slavens II Paul R | Tulsa, OK 74131-2244 | Oil & Gas Operator | Dec 2024 |
| 975 | Slick Production Inc | Tulsa, OK 74132-1718 | Oil & Gas Operator | Apr 2020 |
| 976 | Sloan Production Co | | Oil Operator | Jan 2013 |
| 977 | Smith Richard L | Catoosa, OK 74015 | Oil & Gas Operator | Dec 2019 |
| 978 | Smith Vernon C | Tulsa, OK 74104-4611 | Oil & Gas Operator | Oct 2024 |
| 979 | Smith, W.T. | Panhandle, TX 79068 | Oil & Gas Operator | Nov 2005 |
| 980 | SNR Central Oklahoma Operating LLC | Oklahoma City, OK 73116-7906 | Oil Operator | Jan 2025 |
| 981 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 982 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 983 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 984 | Sopac Exploration Inc | Drumright, OK 74030 | Oil & Gas Operator | Jun 1993 |
| 985 | South Burbank Petroleum Corporation | Midland, TX 79707-9027 | Oil Operator | Feb 2010 |
| 986 | South Sands Exploration LLC | Henryetta, OK 74437-4208 | Oil & Gas Operator | Dec 2024 |
| 987 | Southern Int'L Inc | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2007 |
| 988 | Southern Operating Corporation | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 989 | Southern Star Central Gas Pipeline, Inc. | Owensboro, KY 42301 | Oil & Gas Operator | Dec 2024 |
| 990 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 991 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 992 | Southwest Petroleum Corp | Drumright, OK 74030 | Oil & Gas Operator | Mar 2018 |
| 993 | Sparks Greg | Afton, OK 74331 | Oil & Gas Operator | Dec 2024 |
| 994 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Oct 2024 |
| 995 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Jan 2025 |
| 996 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Mar 2025 |
| 997 | Spectrum Energy Inc | Scottsdale, AZ 85257 | Oil & Gas Operator | Oct 2003 |
| 998 | Spectrum Oil Company | Irving, TX 75063 | Oil & Gas Operator | May 2013 |
| 999 | Speer Kenneth G | Seminole, OK 74818-1202 | Oil & Gas Operator | Dec 2001 |
| 1000 | Spencer Kevin LLC | Drumright, OK 74030-5825 | Oil & Gas Operator | Sep 2019 |