| 701 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 702 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2025 |
| 703 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Feb 2025 |
| 704 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 705 | Ross Curtis | Ada, OK 74820-1354 | Oil & Gas Operator | Feb 2012 |
| 706 | Royal Petroleum | Baytown, TX 77521 | Oil & Gas Operator | Aug 2003 |
| 707 | RTC Resources, LLP | Weatherford, OK 73096 | Oil & Gas Operator | Apr 2025 |
| 708 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Dec 2024 |
| 709 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |
| 710 | Ryan Petroleum Operating Inc | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | May 1999 |
| 711 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 712 | S R W Oil | Laverne, OK 73848 | Oil & Gas Operator | Sep 2024 |
| 713 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 714 | Sage Drilling Co | Wichita, KS 67202 | Oil & Gas Operator | Nov 1998 |
| 715 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 716 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 717 | Samson Gas Producing Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 718 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 719 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |
| 720 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Jan 2025 |
| 721 | Sandlot Oil & Gas LLC | Gruver, TX 79040 | Oil & Gas Operator | Apr 2025 |
| 722 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Apr 2025 |
| 723 | Sanford Casondra | Ada, OK 74820-4460 | Oil & Gas Operator | May 2013 |
| 724 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 725 | Saqus Oil Co | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2001 |
| 726 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 727 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 728 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 729 | Scarth Oil & Gas Co | Amarillo, TX 79101 | Oil & Gas Operator | Feb 1999 |
| 730 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Apr 2025 |
| 731 | Scott Chas W | | Oil & Gas Operator | Jan 1999 |
| 732 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 733 | SCS Newton Oil LLC | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 734 | Seabren Gas System Inc | Okla City, OK 73112 | Oil & Gas Operator | Mar 2016 |
| 735 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 736 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 737 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 738 | Search Drilling Company | Houston, TX 77010 | Oil & Gas Operator | Feb 2001 |
| 739 | Sec Production Inc | Edmond, OK 73013-3709 | Oil & Gas Operator | Feb 2025 |
| 740 | Seneca Oil Company | Tulsa, OK 74121-1518 | Oil & Gas Operator | Jan 2015 |
| 741 | Sensor Oil & Gas Inc | Duncan, OK 73534 | Oil & Gas Operator | May 2013 |
| 742 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 743 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 744 | Seventy-One Inc | | Oil & Gas Operator | May 1999 |
| 745 | Shannon Petroleum Inc | Tulsa, OK 74136-4603 | Oil & Gas Operator | Oct 2016 |
| 746 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 747 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Jan 2025 |
| 748 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 749 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2025 |
| 750 | Sho-Bar Energy, Inc. | Harper, KS 67058 | Oil & Gas Operator | Dec 2024 |
| 751 | Shortgrass Petroleum Inc | Laverne, OK 73848-0139 | Oil & Gas Operator | Jan 2025 |
| 752 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 753 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 754 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2025 |
| 755 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 756 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2025 |
| 757 | Smokey Trail LLC | Thornton, CO 80241 | Oil & Gas Operator | Feb 2025 |
| 758 | Snelgrooes Oil Company Inc | Maysville, OK 73057-0631 | Oil & Gas Operator | Nov 2014 |
| 759 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 760 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 761 | Snyder Partners | Cody, WY 82414 | Oil & Gas Operator | Feb 2025 |
| 762 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 763 | Sorrels J R Dba Cheyenne Oil Properties | Ponca City, OK 74601 | Oil & Gas Operator | Jul 2022 |
| 764 | South Forty, The, Inc. | Laverne, OK 73848 | Oil & Gas Operator | Mar 2015 |
| 765 | Southern Star Central Gas Pipeline, Inc. | Owensboro, KY 42301 | Oil & Gas Operator | Jan 2025 |
| 766 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 767 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 768 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 769 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2025 |
| 770 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Jan 2025 |
| 771 | Spencer Oil Company LLC | Bartlesville, OK 74006 | Oil Operator | Jan 2015 |
| 772 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Feb 2025 |
| 773 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 774 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 775 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 776 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |
| 777 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jan 2025 |
| 778 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 779 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 780 | Statex Operating, LLC | Dallas, TX 75229 | Oil & Gas Operator | Mar 2007 |
| 781 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 782 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 783 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Feb 2025 |
| 784 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2025 |
| 785 | Stewart K Petroleum Corp | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 786 | Stoltz Wagner & Brown | | Oil Operator | Nov 1998 |
| 787 | Stone Oak Operating LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Feb 2025 |
| 788 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |
| 789 | Stromquist C Dale | Liberal, KS 67901-2428 | Oil & Gas Operator | Jun 2006 |
| 790 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 791 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2025 |
| 792 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 793 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Apr 2025 |
| 794 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 795 | Sunrise Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Aug 1993 |
| 796 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 797 | Suoco Oil Corporation | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 798 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Jan 2025 |
| 799 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 800 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2025 |