| 1 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 2 | S R W Oil | Laverne, OK 73848 | Oil & Gas Operator | Aug 2023 |
| 3 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 4 | Sage Drilling Co | Wichita, KS 67202 | Oil & Gas Operator | Nov 1998 |
| 5 | Salty Dog Disposal LLC | | Oil Operator | Feb 2024 |
| 6 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 7 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 8 | Samson Gas Producing Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2001 |
| 9 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 10 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 11 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Dec 2023 |
| 12 | Sandlot Oil & Gas LLC | Gruver, TX 79040 | Oil & Gas Operator | Apr 2024 |
| 13 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 14 | Sanford Casondra | Ada, OK 74820-4460 | Oil & Gas Operator | May 2013 |
| 15 | Santa Fe Minerals, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2013 |
| 16 | Saqus Oil Co | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2001 |
| 17 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 18 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 19 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 20 | Scarth Oil & Gas Co | Amarillo, TX 79101 | Oil & Gas Operator | Feb 1999 |
| 21 | Schmid Properties Inc | Hico, TX 76457 | Oil & Gas Operator | Apr 2024 |
| 22 | Scott Chas W | | Oil & Gas Operator | Jan 1999 |
| 23 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 24 | SCS Newton Oil LLC | Perryton, TX 79070 | Oil & Gas Operator | Apr 2024 |
| 25 | Seabren Gas System Inc | Okla City, OK 73112 | Oil & Gas Operator | Mar 2016 |
| 26 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 27 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 28 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 29 | Search Drilling Company | Houston, TX 77010 | Oil & Gas Operator | Feb 2001 |
| 30 | Sec Production Inc | Edmond, OK 73013-3709 | Oil & Gas Operator | Jan 2024 |
| 31 | Semcrude LP | | Oil & Gas Operator | Jul 2008 |
| 32 | Seneca Oil Company | Tulsa, OK 74121-1518 | Oil & Gas Operator | Jan 2015 |
| 33 | Sensor Oil & Gas Inc | Duncan, OK 73534 | Oil & Gas Operator | May 2013 |
| 34 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 35 | Service Drilling Co., L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2003 |
| 36 | Seventy-One Inc | | Oil & Gas Operator | May 1999 |
| 37 | Shannon Petroleum Inc | Tulsa, OK 74136-4603 | Oil & Gas Operator | Oct 2016 |
| 38 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 39 | Shell Oil Company | Houston, TX 77210 | Oil & Gas Operator | Apr 2015 |
| 40 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Dec 2023 |
| 41 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 42 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2023 |
| 43 | Sho-Bar Energy, Inc. | Harper, KS 67058 | Oil & Gas Operator | Dec 2023 |
| 44 | Shortgrass Petroleum Inc | Laverne, OK 73848-0139 | Oil & Gas Operator | Dec 2023 |
| 45 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 46 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 47 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2024 |
| 48 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Nov 2023 |
| 49 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 50 | Smokey Trail LLC | Eastlake, CO 80241-1640 | Oil & Gas Operator | Jan 2024 |
| 51 | Snelgrooes Oil Company Inc | Maysville, OK 73057-0631 | Oil & Gas Operator | Nov 2014 |
| 52 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 53 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 54 | Snyder Partners | Cody, WY 82414 | Oil & Gas Operator | Jan 2024 |
| 55 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 56 | Sorrels J R Dba Cheyenne Oil Properties | Ponca City, OK 74602-0067 | Oil & Gas Operator | Jul 2022 |
| 57 | South Forty, The, Inc. | Laverne, OK 73848 | Oil & Gas Operator | Mar 2015 |
| 58 | Southern Star Central Gas Pipeline, Inc. | Owensboro, KY 42301 | Oil & Gas Operator | Dec 2023 |
| 59 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 60 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 61 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 62 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2024 |
| 63 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2023 |
| 64 | Spencer Oil Company LLC | Dewey, OK 74029-0416 | Oil Operator | Jan 2015 |
| 65 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Jan 2024 |
| 66 | Spring Operating Company | Edmond, OK 73083-2048 | Oil & Gas Operator | Jan 2024 |
| 67 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 68 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 69 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 70 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2023 |
| 71 | Staghorn Petroleum LLC | | Oil & Gas Operator | Dec 2023 |
| 72 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 73 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 74 | Statex Operating, LLC | Dallas, TX 75229 | Oil & Gas Operator | Mar 2007 |
| 75 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 76 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2024 |
| 77 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Jan 2024 |
| 78 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Jan 2024 |
| 79 | Stewart K Petroleum Corp | Edmond, OK 73013 | Oil & Gas Operator | Mar 2015 |
| 80 | Stoltz Wagner & Brown | | Oil Operator | Nov 1998 |
| 81 | Stone Oak Operating, LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Jan 2024 |
| 82 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2023 |
| 83 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 84 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2023 |
| 85 | Sun Refining & Marketing | Philadelphia, PA 19103 | Oil & Gas Operator | Jul 2015 |
| 86 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Apr 2024 |
| 87 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Dec 2023 |
| 88 | Sunrise Energy Co | Dallas, TX 75206 | Oil & Gas Operator | Aug 1993 |
| 89 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 90 | Suoco Oil Corporation | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 91 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 92 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Dec 2023 |
| 93 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 94 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Dec 2023 |