| 701 | Questar Energy Trading | Salt Lake City, UT 84145-0601 | Oil & Gas Operator | Mar 2020 |
| 702 | Questar Explor & Prod Co | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2017 |
| 703 | R L Clampitt & Associates LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Sep 2024 |
| 704 | R.D. Oil Company | Austin, TX 78755 | Oil & Gas Operator | Dec 2024 |
| 705 | Ra-Jac LLC | Norman, OK 73072 | Oil & Gas Operator | Oct 2024 |
| 706 | Raizen Oil Company | Velma, OK 73091 | Oil & Gas Operator | Feb 2016 |
| 707 | Raizen Oil LLC | Duncan, OK 73533-4657 | Oil & Gas Operator | Nov 2003 |
| 708 | Rama Operating Co., Inc. | Stafford, KS 67578 | Oil & Gas Operator | Oct 2024 |
| 709 | Rambler Oil Co | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 1999 |
| 710 | Ramco Oil & Gas Inc | Midland, TX 79701 | Oil & Gas Operator | Nov 2006 |
| 711 | Ramsey Nichols Operating Company LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Oct 2024 |
| 712 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Sep 2024 |
| 713 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 714 | Ranken Energy Corporation | Edmond, OK 73013 | Oil & Gas Operator | Oct 2024 |
| 715 | Raw Crude Oil & Gas LLC | Norman, OK 73069 | Oil & Gas Operator | Oct 2024 |
| 716 | Raw Production LLC | Lindsay, OK 73052 | Oil & Gas Operator | Sep 2024 |
| 717 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2024 |
| 718 | Rebellion Energy LLC | Tulsa, OK 74135-6241 | Oil & Gas Operator | Jun 2022 |
| 719 | Red Earth Oil & Gas, Inc. | Oklahoma City, OK 73159 | Oil & Gas Operator | Oct 2021 |
| 720 | Red Fork Oil Production Inc | Mannford, OK 74044-0492 | Oil & Gas Operator | Feb 2017 |
| 721 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | Oct 2024 |
| 722 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103-4821 | Oil & Gas Operator | Oct 2024 |
| 723 | Red Sand Resources LLC | Ada, OK 74821 | Oil Operator | Sep 2024 |
| 724 | Redbud Oil Company | Elmore City, OK 73433-8637 | Oil Operator | Sep 2024 |
| 725 | Reid Williams Operating Inc | Shreveport, LA 71106-6223 | Oil & Gas Operator | Sep 2024 |
| 726 | Renco Energy Inc | Calgary, AB T2H 0H6 | Oil & Gas Operator | Sep 2024 |
| 727 | Republic Resources Corporation | Oklahoma City, OK 73102-3081 | Oil & Gas Operator | May 2021 |
| 728 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 729 | Rhoades Oil Co | Tulsa, OK 74136-5575 | Oil & Gas Operator | Aug 2013 |
| 730 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 731 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 732 | Rico Oil Company | Graham, TX 76450 | Oil & Gas Operator | Dec 2024 |
| 733 | Riley Lee Roy | Chickasha, OK 73018-9306 | Oil & Gas Operator | May 2006 |
| 734 | Rimrock Resource Operating LLC | Tulsa, OK 74103-4462 | Oil & Gas Operator | Sep 2024 |
| 735 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2024 |
| 736 | RJ Williams Oil & Gas LLC | Ardmore, OK 73401 | Oil & Gas Operator | Oct 2024 |
| 737 | Rja Energy LLC | Norman, OK 73069-8224 | Oil & Gas Operator | Oct 2024 |
| 738 | RKK Production Company | Mustang, OK 73064 | Oil & Gas Operator | Oct 2024 |
| 739 | Roan Resources LLC | Tulsa, OK 74103-3729 | Oil & Gas Operator | Apr 2024 |
| 740 | Roberson David A | Ada, OK 74821-0008 | Oil & Gas Operator | Jul 2010 |
| 741 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2024 |
| 742 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 743 | Rocket Oil Company | Duncan, OK 73534 | Oil & Gas Operator | Apr 2015 |
| 744 | Romax Corporation | Ardmore, OK 73401-8882 | Oil & Gas Operator | Feb 2022 |
| 745 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Dec 2024 |
| 746 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Dec 2024 |
| 747 | Rox Exploration Inc | Norman, OK 73069-6301 | Oil & Gas Operator | Oct 2024 |
| 748 | Rozell Harold Dba Roundup Oil LLC | Springer, OK 73458 | Oil & Gas Operator | Oct 2024 |
| 749 | RPM Oilfield Services LLC | Lindsay, OK 73052-8005 | Oil & Gas Operator | Sep 2024 |
| 750 | Rue Johnny B | Duncan, OK 73533-2019 | Oil Operator | Sep 2024 |
| 751 | Ruh Oil Company | Collinsville, OK 74021 | Oil & Gas Operator | Sep 2024 |
| 752 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Aug 2024 |
| 753 | Rustler Energy LLC | Lindsay, OK 73052 | Oil & Gas Operator | Oct 2024 |
| 754 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |
| 755 | S & H Tank Service Of Okla | Lindsay, OK 73052 | Oil & Gas Operator | Mar 2017 |
| 756 | Sajac Energy Company LLC | Duncan, OK 73533 | Oil & Gas Operator | Oct 2024 |
| 757 | Salt Creek Production, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Dec 2024 |
| 758 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 759 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 760 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2024 |
| 761 | San Francisco-Okla Pet Ex Inc | | Oil & Gas Operator | Apr 2014 |
| 762 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Sep 2024 |
| 763 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2024 |
| 764 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 765 | Santa Fe Energy Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2015 |
| 766 | Saqus Oil Co | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2001 |
| 767 | Sasakwa Operating LLC | Oklahoma City, OK 73179-1902 | Oil & Gas Operator | Sep 2024 |
| 768 | Scissortail Exploration And Production LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
| 769 | Seaboard Gas Company | Edmond, OK 73034 | Oil & Gas Operator | Feb 1999 |
| 770 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 771 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2024 |
| 772 | Sean M Sharp LLC | Chalk Hill, PA 15421 | Oil & Gas Operator | Sep 2024 |
| 773 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | Sep 2024 |
| 774 | Semcrude LP | Oklahoma City, OK 73112-5449 | Oil & Gas Operator | Jul 2008 |
| 775 | Senico Production Company | Irving, TX 75016-5229 | Oil & Gas Operator | Mar 2002 |
| 776 | Settlers Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Apr 1998 |
| 777 | Seven J Oil Inc | Jenning, OK 74038-9729 | Oil & Gas Operator | Sep 2024 |
| 778 | Seventh Corporation The | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2006 |
| 779 | Seventy-One Inc | | Oil & Gas Operator | May 1999 |
| 780 | Shadowpeak Operating LLC | Oklahoma City, OK 73159-6905 | Oil & Gas Operator | Aug 2024 |
| 781 | Shamrock Well Operations LLC | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Oct 2024 |
| 782 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 783 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 784 | Shebester Inc | Maysville, OK 73057 | Oil & Gas Operator | Nov 1998 |
| 785 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2024 |
| 786 | Shelter Petroleum,Inc | | Oil & Gas Operator | Jun 2014 |
| 787 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2024 |
| 788 | Shield Operating Co. | Georgetown, TX 78627 | Oil & Gas Operator | Aug 2003 |
| 789 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Oct 2024 |
| 790 | Shoshone Oil And Gas Inc | Lindsay, OK 73052-0217 | Oil & Gas Operator | Jan 2020 |
| 791 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 792 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 793 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 794 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 795 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Sep 2024 |
| 796 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 797 | Smiley Drilling Co | Oklahoma City, OK 73156-0773 | Oil & Gas Operator | Apr 1999 |
| 798 | Snelgrooes Oil Company Inc | Maysville, OK 73057-0631 | Oil & Gas Operator | Nov 2014 |
| 799 | Snelgrooes Well Service Inc | Elmore City, OK 73433 | Oil & Gas Operator | May 2003 |
| 800 | Snuffy'S Oilfield Service Inc | Hennessey, OK 73742-6511 | Oil & Gas Operator | Nov 2014 |