| 6001 | Sundance Operating Co | | Oil & Gas Operator | Jul 2016 |
| 6002 | Sunday-Smith Mary E | Mannford, OK 74044-1457 | Oil & Gas Operator | Mar 2015 |
| 6003 | Sundial Energy LLC | Oklahoma City, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 6004 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Apr 2025 |
| 6005 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2024 |
| 6006 | Sunland Enterprises Corp | Norman, OK 73071 | Oil Operator | Sep 2004 |
| 6007 | Sunlight Exploration, Inc. | Canyon, TX 79015 | Oil & Gas Operator | Apr 2025 |
| 6008 | Sunnybook Transmission Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 1992 |
| 6009 | Sunoco Partners MKT & Terminal | Tulsa, OK 74102-2039 | Oil & Gas Operator | Jan 2019 |
| 6010 | Sunrise Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Aug 1993 |
| 6011 | Sunset Energy L L C | Palm Harbor, FL 34683-3044 | Oil Operator | Dec 2007 |
| 6012 | Sunstone Energy Company | Tulsa, OK 74153 | Oil & Gas Operator | Aug 2009 |
| 6013 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 6014 | Sunwest Oklahoma, Inc | Dallas, TX 75231 | Oil & Gas Operator | May 2023 |
| 6015 | Suoco Oil Corporation | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 6016 | Super Heaters LLC | Houston, TX 77242-1328 | Oil Operator | Mar 2022 |
| 6017 | Superior Companies Inc | Bartlesville, OK 74003-2621 | Oil & Gas Operator | May 2013 |
| 6018 | Superior Midstream, LLC | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2020 |
| 6019 | Superior Oil & Gas Company Of Oklahoma | Calumet, OK 73014-8528 | Oil & Gas Operator | Jan 2024 |
| 6020 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Feb 2025 |
| 6021 | Superior Oil Co. | Denver, CO 80217-5444 | Oil & Gas Operator | Feb 2001 |
| 6022 | Superior Production LLC | Ringwood, OK 73768 | Oil & Gas Operator | Feb 2025 |
| 6023 | Superior Production MGMT Inc | Calumet, OK 73014 | Oil & Gas Operator | Mar 2015 |
| 6024 | Superior Saltwater Disposal LLC | Ringwood, OK 73768 | Oil & Gas Operator | Dec 2016 |
| 6025 | Supplyco Inc | Perry, OK 73077 | Oil & Gas Operator | Apr 2014 |
| 6026 | Surge Ok Midstream LLC | Oklahoma City, OK 73114 | Oil Operator | Feb 2025 |
| 6027 | Survivor Oil Inc | Tulsa, OK 74133 | Oil & Gas Operator | Sep 2007 |
| 6028 | Susaect LLC | Houston, TX 77079 | Oil Operator | Jan 2025 |
| 6029 | Sutton Eddie L Oil Company | Loco, OK 73442-9701 | Oil Operator | Jan 2025 |
| 6030 | Sutton Energy LLC | Ada, OK 74820-8550 | Oil & Gas Operator | Jan 2025 |
| 6031 | Sutton Oil Company, LLC | Loco, OK 73442 | Oil Operator | Jan 2025 |
| 6032 | Sutton-Munson Oil | Edmond, OK 73034 | Oil & Gas Operator | Jun 1999 |
| 6033 | Sutton-Rhoads Exploration Inc | | Oil & Gas Operator | Aug 2005 |
| 6034 | Swadley Et Al | Holdenville, OK 74848-0794 | Oil & Gas Operator | Nov 2014 |
| 6035 | Swadley Roy W & Judith I | Holdenville, OK 74848-0794 | Oil & Gas Operator | Mar 2015 |
| 6036 | Swain Clinton Edward | Ochelata, OK 74051-2220 | Oil Operator | Oct 2024 |
| 6037 | Swain, Randall R | | Oil Operator | Aug 2000 |
| 6038 | Swan Oil Company | Kellyville, OK 74039-5607 | Oil & Gas Operator | Dec 2023 |
| 6039 | Swan Richard N | Claremore, OK 74018-0503 | Oil Operator | Aug 2013 |
| 6040 | Swanson Douglas L & Sharon | Bartlesville, OK 74003-9319 | Oil Operator | Jan 2025 |
| 6041 | Swanson G T | Duncan, OK 73533 | Oil & Gas Operator | Nov 1998 |
| 6042 | Swanson, Tommy Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 6043 | Swearingen Robert E Dba Sabo Production | Seminole, OK 74868 | Oil & Gas Operator | Jan 2025 |
| 6044 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Jan 2025 |
| 6045 | Swenton, Michael J. | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2025 |
| 6046 | Swift A W & Company Inc | Sand Springs, OK 74063-5124 | Oil Operator | Jun 2003 |
| 6047 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 6048 | Swinea Well Service Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2015 |
| 6049 | Swinkwood Oil Co | | Oil Operator | Apr 2015 |
| 6050 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 6051 | SWS Operating LLC | Lawton, OK 73501-3236 | Oil Operator | Sep 2024 |
| 6052 | Sydson D'Oro Expl. Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |
| 6053 | Sylvan Oil Operating Company | Tulsa, OK 74103-3516 | Oil & Gas Operator | Apr 2016 |
| 6054 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2025 |
| 6055 | T & B Oil Company Inc | Ardmore, OK 73401-3709 | Oil & Gas Operator | Apr 2015 |
| 6056 | T & D Oil | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 6057 | T & D Oil LLC | Sand Springs, OK 74063 | Oil & Gas Operator | Jan 2025 |
| 6058 | T & G Holding LLC | Pauls Valley, OK 73075-8663 | Oil & Gas Operator | Mar 2015 |
| 6059 | T & J Oil Production, L.L.C. | Lone Grove, OK 73443 | Oil & Gas Operator | Jan 2025 |
| 6060 | T & J Operating | Ada, OK 74821-1547 | Oil Operator | Feb 2012 |
| 6061 | T & K Oil Inc | Stephens, AR 71764 | Oil Operator | Aug 2024 |
| 6062 | T & M Oil & Royalty | Ada, OK 74820 | Oil Operator | Feb 2012 |
| 6063 | T & M Oil Company | Midlothian, TX 76065 | Oil & Gas Operator | Apr 2025 |
| 6064 | T & O Gas Co | | Oil Operator | May 2001 |
| 6065 | T & P Exploration | Addison, TX 75006 | Oil & Gas Operator | Aug 1993 |
| 6066 | T & S Mud Disposal LLC | Lindsay, OK 73052-0754 | Oil Operator | Mar 2013 |
| 6067 | T & W Ward Oil LLC | Blackwell, OK 74631 | Oil Operator | Jan 2025 |
| 6068 | T And L Oil Inc | Tonkawa, OK 74653-4530 | Oil & Gas Operator | Jan 2025 |
| 6069 | T B C Inc | Coweta, OK 74429 | Oil & Gas Operator | Apr 2020 |
| 6070 | T B K Energy Company | New Braunfels, TX 78130 | Oil & Gas Operator | Feb 2025 |
| 6071 | T Bar M Energy Resources LLC | Mounds, OK 74047 | Oil & Gas Operator | Jan 2025 |
| 6072 | T C Craighead & Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2019 |
| 6073 | T C M LLC | | Gas Operator | Jun 2009 |
| 6074 | T D Energy Company Inc | Broken Arrow, OK 74011-3953 | Oil & Gas Operator | Feb 2015 |
| 6075 | T E F Inc | Madill, OK 73446-6656 | Oil & Gas Operator | Jul 2023 |
| 6076 | T E L Oil & Gas Corporation | Guymon, OK 73941 | Gas Operator | Jan 2025 |
| 6077 | T G & S Oil | Marietta, OK 73448 | Oil & Gas Operator | Dec 2024 |
| 6078 | T Investments Inc | Oklahoma City, OK 73118-1401 | Oil & Gas Operator | Mar 2011 |
| 6079 | T L C Oil Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2025 |
| 6080 | T S B T Oil & Gas Properties | Moore, OK 73160-8126 | Oil & Gas Operator | Jan 2018 |
| 6081 | T T & T Inc | Shawnee, OK 74802-3694 | Oil & Gas Operator | Jan 1994 |
| 6082 | T W Law LLC | Muskogee, OK 74403-6736 | Oil Operator | Jan 2025 |
| 6083 | T-D Oil Inc | Cement, OK 73017-0065 | Oil & Gas Operator | May 2020 |
| 6084 | T-K Exploration Company | Oklahoma City, OK 73102-7029 | Oil & Gas Operator | Mar 2015 |
| 6085 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 6086 | T.C. Harris Pumping LLC | Hennessey, OK 73742 | Gas Operator | Jan 2025 |
| 6087 | T2 Operating Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 6088 | Taber Oil Co | | Oil Operator | Sep 2018 |
| 6089 | Tack Operating LLC | Oklahoma City, OK 73172-1492 | Oil & Gas Operator | Aug 2021 |
| 6090 | Tag Oil Co LLC | Ringling, OK 73456 | Oil & Gas Operator | Feb 2025 |
| 6091 | Tag Operating Company, Inc. | Houston, TX 77092 | Oil & Gas Operator | Apr 2025 |
| 6092 | Tag Petroleum Inc | Stillwater, OK 74076 | Oil & Gas Operator | Jan 2021 |
| 6093 | Tag Team Resources LLC | Eufaula, OK 74432 | Oil & Gas Operator | Jan 2025 |
| 6094 | Tahoe Exploration Inc. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2016 |
| 6095 | Talbert, Eugene Operating Co,Inc | Tyler, TX 75702 | Oil & Gas Operator | Dec 1997 |
| 6096 | Tallgrass Energy, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2025 |
| 6097 | Tallgrass Petroleum Corp | Hominy, OK 74035 | Oil & Gas Operator | Feb 2012 |
| 6098 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 6099 | Tamarack Petroleum Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 6100 | Tamworth Resources LLC | Broken Arrow, OK 74012 | Oil & Gas Operator | Jan 2025 |