| 701 | Red Dirt Environmental Services LLC | Checotah, OK 74426 | Oil & Gas Operator | Sep 2025 |
| 702 | Red Earth Oil & Gas, Inc. | Oklahoma City, OK 73159 | Oil & Gas Operator | Oct 2021 |
| 703 | Red Fork Oil Production Inc | Mannford, OK 74044-0492 | Oil & Gas Operator | Feb 2017 |
| 704 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | Oct 2025 |
| 705 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103-4821 | Oil & Gas Operator | Oct 2025 |
| 706 | Red Sand Resources LLC | Ada, OK 74821 | Oil Operator | Aug 2025 |
| 707 | Redbud Oil Company | Elmore City, OK 73433-8637 | Oil Operator | Sep 2025 |
| 708 | Reid Williams Operating Inc | Shreveport, LA 71106-6223 | Oil & Gas Operator | Sep 2025 |
| 709 | Renco Energy Inc | Calgary, AB T2H 0H6 | Oil & Gas Operator | Feb 2025 |
| 710 | Republic Resources Corporation | Oklahoma City, OK 73102-3081 | Oil & Gas Operator | May 2021 |
| 711 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 712 | Rhoades Oil Co | Tulsa, OK 74136-5575 | Oil & Gas Operator | Aug 2013 |
| 713 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 714 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 715 | Rico Oil Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 716 | Riley Lee Roy | Chickasha, OK 73018-9306 | Oil & Gas Operator | May 2006 |
| 717 | Rimrock Resource Operating LLC | Tulsa, OK 74103-4462 | Oil & Gas Operator | Oct 2025 |
| 718 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 719 | RJ Williams Oil & Gas LLC | Ardmore, OK 73401 | Oil & Gas Operator | Sep 2025 |
| 720 | Rja Energy LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Oct 2025 |
| 721 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Oct 2025 |
| 722 | Roan Resources LLC | Tulsa, OK 74103-3729 | Oil & Gas Operator | Apr 2024 |
| 723 | Roberson David A | Ada, OK 74821-0008 | Oil & Gas Operator | Jul 2010 |
| 724 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 725 | Robert B Knight Dba D & K Oil Company | Stratford, OK 74872-6732 | Oil Operator | Jul 2022 |
| 726 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 727 | Rocket Oil Company | Duncan, OK 73534 | Oil & Gas Operator | Apr 2015 |
| 728 | Romax Corporation | Ardmore, OK 73401-8882 | Oil & Gas Operator | Feb 2022 |
| 729 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2025 |
| 730 | Rosewood Resources Inc | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 731 | Roundup Oil LLC | Springer, OK 73458 | Oil & Gas Operator | Oct 2025 |
| 732 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Oct 2025 |
| 733 | Rue Johnny B | Duncan, OK 73533-2019 | Oil & Gas Operator | Jan 2025 |
| 734 | Ruh Oil Company | Collinsville, OK 74021 | Oil & Gas Operator | Sep 2025 |
| 735 | Rupe Oil Company Inc | Wichita, KS 67278 | Oil & Gas Operator | Jun 2025 |
| 736 | Rustler Energy LLC | Lindsay, OK 73052 | Oil & Gas Operator | Sep 2025 |
| 737 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |
| 738 | S & H Tank Service Of Okla | Lindsay, OK 73052 | Oil & Gas Operator | Mar 2017 |
| 739 | Sajac Energy Company LLC | Duncan, OK 73533 | Oil & Gas Operator | Oct 2025 |
| 740 | Salt Creek Production, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Dec 2025 |
| 741 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 742 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 743 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 744 | San Francisco-Okla Pet Ex Inc | | Oil & Gas Operator | Apr 2014 |
| 745 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Oct 2025 |
| 746 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2025 |
| 747 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 748 | Santa Fe Energy Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 749 | Saqus Oil Co | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2001 |
| 750 | Sasakwa Operating LLC | Oklahoma City, OK 73179-1902 | Oil & Gas Operator | Aug 2025 |
| 751 | Scissortail Exploration And Production LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2025 |
| 752 | Seaboard Gas Company | Edmond, OK 73034 | Oil & Gas Operator | Feb 1999 |
| 753 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 754 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 755 | Sean M Sharp LLC | Chalk Hill, PA 15421 | Oil & Gas Operator | Mar 2025 |
| 756 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | Oct 2025 |
| 757 | Senico Production Company | Irving, TX 75016-5229 | Oil & Gas Operator | Mar 2002 |
| 758 | Settlers Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Apr 1998 |
| 759 | Seven J Oil Inc | Jenning, OK 74038-9729 | Oil & Gas Operator | Sep 2025 |
| 760 | Seventh Corporation The | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2006 |
| 761 | Shadowpeak Operating LLC | Oklahoma City, OK 73159-6905 | Oil & Gas Operator | Sep 2025 |
| 762 | Shamrock Well Operations LLC | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Sep 2025 |
| 763 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 764 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 765 | Shebester Inc | Maysville, OK 73057 | Oil & Gas Operator | Nov 1998 |
| 766 | Shelter Petroleum,Inc | | Oil & Gas Operator | Jun 2014 |
| 767 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 768 | Shield Operating Co. | Georgetown, TX 78627 | Oil & Gas Operator | Aug 2003 |
| 769 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Oct 2025 |
| 770 | Shoshone Oil And Gas Inc | Lindsay, OK 73052-0217 | Oil & Gas Operator | Jan 2020 |
| 771 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 772 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 773 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 774 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Sep 2025 |
| 775 | Singer-Fleischaker Oil Op Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 776 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2025 |
| 777 | Smiley Drilling Co | Oklahoma City, OK 73156-0773 | Oil & Gas Operator | Apr 1999 |
| 778 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 779 | Snelgrooes Oil Company Inc | Maysville, OK 73057-0631 | Oil & Gas Operator | Nov 2014 |
| 780 | Snelgrooes Well Service Inc | Elmore City, OK 73433 | Oil & Gas Operator | May 2003 |
| 781 | Snuffy'S Oilfield Service Inc | Hennessey, OK 73742-6511 | Oil & Gas Operator | Nov 2014 |
| 782 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 783 | Sonata Oil & Gas Corp Inc | Stratford, OK 74812 | Oil & Gas Operator | Apr 2014 |
| 784 | Song Production Company | Lindsay, OK 73052-0369 | Oil & Gas Operator | Jun 2015 |
| 785 | Sooner Energy LLC | Norman, OK 73069 | Oil & Gas Operator | Sep 2005 |
| 786 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 787 | Southcreek Petroleum Co LLC | Blanchard, OK 73010-4911 | Oil & Gas Operator | Jul 2025 |
| 788 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Oct 2025 |
| 789 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 790 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Oct 2025 |
| 791 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Oct 2025 |
| 792 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | Oct 2025 |
| 793 | Special Energy Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Dec 2025 |
| 794 | Spectrum Field Services Inc | Tulsa, OK 74136-3400 | Oil & Gas Operator | Jan 2004 |
| 795 | Speed James F | Ada, OK 74821-1221 | Oil & Gas Operator | Nov 2009 |
| 796 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Dec 2025 |
| 797 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Oct 2025 |
| 798 | SSB Production LC | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2025 |
| 799 | St Oil Company LLC | New York, NY 10005-4016 | Oil Operator | Oct 2025 |
| 800 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |