| 1 | S & G Operating LLC | McLoud, OK 74851 | Oil & Gas Operator | Jul 2025 |
| 2 | S & K Oil Company | Tulsa, OK 74101 | Oil & Gas Operator | Jul 1994 |
| 3 | S N D Energy Company, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Oct 2025 |
| 4 | S O S Recovery Inc | Enid, OK 73703-2403 | Oil & Gas Operator | Jul 2023 |
| 5 | S T Industries Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2011 |
| 6 | S/H Petroleum Corporation | Hennessey, OK 73742-0477 | Oil & Gas Operator | Feb 2016 |
| 7 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 8 | Salt Fork Producers Inc | Pond Creek, OK 73766 | Oil & Gas Operator | Jan 1995 |
| 9 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 10 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 11 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 12 | Sand Point Production Inc | Oklahoma City, OK 73172 | Oil & Gas Operator | Jun 2025 |
| 13 | Sandridge Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2018 |
| 14 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Oct 2025 |
| 15 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 16 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 17 | Scana Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2005 |
| 18 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 19 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 20 | Seals And Brown Oil Operating | Norman, OK 73072-3020 | Oil & Gas Operator | Sep 2024 |
| 21 | Seals Oil Company | Fox, OK 73435-0222 | Oil & Gas Operator | Nov 2011 |
| 22 | Sec Production Inc | Edmond, OK 73013-3709 | Oil & Gas Operator | Jul 2025 |
| 23 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 24 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 25 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 26 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 27 | Shaver Tommy L | Kingfisher, OK 73750-9612 | Oil & Gas Operator | Apr 2015 |
| 28 | Shebester Inc | Maysville, OK 73057 | Oil & Gas Operator | Nov 1998 |
| 29 | Shell Oil Company | Houston, TX 77210 | Oil & Gas Operator | Apr 2015 |
| 30 | Shelly Energy Inc. | Berwyn, PA 19312 | Oil & Gas Operator | Jul 2025 |
| 31 | Shelton Alec & Glenda | Kiefer, OK 74041 | Oil & Gas Operator | May 2025 |
| 32 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Jun 2025 |
| 33 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | May 2025 |
| 34 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Jul 2025 |
| 35 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | May 2025 |
| 36 | Siosi Oil & Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2013 |
| 37 | SK Nemaha LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Feb 2021 |
| 38 | SK Plymouth LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Jun 2025 |
| 39 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 40 | Sloan Oil Corporation | Humble, TX 77347 | Oil & Gas Operator | Mar 2015 |
| 41 | Smith C W & Associates Inc | Oklahoma City, OK 73178-0105 | Oil & Gas Operator | Aug 2013 |
| 42 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Oct 2025 |
| 43 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 44 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 45 | Sooner Oil & Gas Management Inc | Crescent, OK 73028 | Oil & Gas Operator | Jun 2025 |
| 46 | Sorrels J R Dba Cheyenne Oil Properties | Ponca City, OK 74601 | Oil & Gas Operator | Jul 2022 |
| 47 | Southerland Marquieta Dba Keta Oil Company | Loco, OK 73442 | Oil & Gas Operator | Jun 2025 |
| 48 | Southern Star Operating LLC | Provo, UT 84604-7714 | Oil & Gas Operator | Jun 2017 |
| 49 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 50 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 51 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 52 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Oct 2025 |
| 53 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Jun 2025 |
| 54 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Jul 2025 |
| 55 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Jul 2025 |
| 56 | Spring Valley Oil & Gas Inc | Drummond, OK 73735 | Oil & Gas Operator | Jul 2025 |
| 57 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Oct 2025 |
| 58 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 59 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 60 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jul 2025 |
| 61 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Jun 2025 |
| 62 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 63 | Starbrite Energy LLC | Enid, OK 73702-0549 | Oil & Gas Operator | Oct 2018 |
| 64 | Stephens Energy Group LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2025 |
| 65 | Stephens Exploration, Inc. | Dallas, TX 75367 | Oil & Gas Operator | Jul 2025 |
| 66 | Sterling Oil Of Okla Inc | Tulsa, OK 74170-2163 | Oil & Gas Operator | Nov 2006 |
| 67 | Stone River Energy Corp | Edmond, OK 73034 | Oil & Gas Operator | Jan 2014 |
| 68 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Oct 2025 |
| 69 | Storm Exploration Inc | Skiatook, OK 74070-1014 | Oil & Gas Operator | Jan 2013 |
| 70 | Strata Oil Corporation | Carmi, IL 62821 | Oil & Gas Operator | Jan 2002 |
| 71 | Stumpff Paul | Bartlesville, OK 74006-3426 | Oil & Gas Operator | Mar 2015 |
| 72 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 73 | Sundance Energy Oklahoma LLC Dba Seo LLC | Denver, CO 80202-3620 | Oil & Gas Operator | Nov 2021 |
| 74 | Sundance Operating Co | | Oil & Gas Operator | Jul 2016 |
| 75 | Sunterra Energy Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2009 |
| 76 | Superior Oil & Gas Company Of Oklahoma | Calumet, OK 73014-8528 | Oil & Gas Operator | Jan 2024 |
| 77 | Superior Oil & Gas LLC | Ringwood, OK 73768-9658 | Oil & Gas Operator | Jul 2025 |
| 78 | Superior Production LLC | Ringwood, OK 73768 | Oil & Gas Operator | Jul 2025 |
| 79 | Superior Saltwater Disposal LLC | | Oil & Gas Operator | Dec 2016 |
| 80 | Supplyco Inc | Perry, OK 73077 | Oil & Gas Operator | Apr 2014 |
| 81 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Jun 2025 |
| 82 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |