| 1 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Jun 2025 |
| 2 | S & S Star Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2023 |
| 3 | S & W Transports Inc | Velma, OK 73491 | Oil Operator | Mar 2025 |
| 4 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 5 | Sajac Energy Company LLC | Duncan, OK 73533 | Oil & Gas Operator | Apr 2025 |
| 6 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 7 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 8 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 9 | Sanguine Gas Exploration, LLC | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2025 |
| 10 | Sanner Jeffrey B Dba Bryant Lyn Production | Velma, OK 73491 | Oil Operator | Mar 2025 |
| 11 | Sanner Oil Co LLC | Duncan, OK 73533 | Oil Operator | Apr 2025 |
| 12 | Sanner Oil Company | Velma, OK 73491-0550 | Oil & Gas Operator | Jan 2014 |
| 13 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 14 | Sanquip LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2024 |
| 15 | Santa Rita Resources Inc & Subs | | Oil & Gas Operator | Mar 2015 |
| 16 | Scout Energy Corporation | Edmond, OK 73083-1348 | Oil & Gas Operator | Mar 2025 |
| 17 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 18 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 19 | Seals And Brown Oil Operating | Norman, OK 73072-3020 | Oil & Gas Operator | Sep 2024 |
| 20 | Seals Oil Company | Fox, OK 73435-0222 | Oil & Gas Operator | Nov 2011 |
| 21 | Sean M Sharp LLC | Chalk Hill, PA 15421 | Oil & Gas Operator | Mar 2025 |
| 22 | Seaport Inc | Oklahoma City, OK 73131 | Oil & Gas Operator | Mar 2025 |
| 23 | Senico Production Company | Irving, TX 75016-5229 | Oil & Gas Operator | Mar 2002 |
| 24 | Shell Oil Company | Houston, TX 77210 | Oil & Gas Operator | Apr 2015 |
| 25 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 26 | Shoshone Oil And Gas Inc | Lindsay, OK 73052-0217 | Oil & Gas Operator | Jan 2020 |
| 27 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 28 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 29 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Jun 2025 |
| 30 | Silvertin Farm Production LLC | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2020 |
| 31 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 32 | Sinclair Oil & Gas Company | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Jun 2025 |
| 33 | Singer Fleischaker Oil Op. Co. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 34 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Mar 2025 |
| 35 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 36 | Slawson, Donald C. | Wichita, KS 67202 | Oil & Gas Operator | Oct 2024 |
| 37 | Sledge Olen | Duncan, OK 73533 | Oil Operator | Mar 2025 |
| 38 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Jun 2025 |
| 39 | Smart Jr T J | Ryan, OK 73565 | Oil Operator | Sep 1994 |
| 40 | Smith Al | Duncan, OK 73534-0037 | Oil Operator | Dec 1998 |
| 41 | Smith Energy Company LLC | Purcell, OK 73080-4772 | Oil & Gas Operator | May 2015 |
| 42 | Smith Harmon K | Wewoka, OK 74884 | Oil & Gas Operator | Jan 2013 |
| 43 | Smokey Trail LLC | Thornton, CO 80241 | Oil & Gas Operator | Apr 2025 |
| 44 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 45 | Song Production Company | Lindsay, OK 73052-0369 | Oil & Gas Operator | Jun 2015 |
| 46 | Sonny'S Tank Trucks Inc | Ratliff City, OK 73481 | Oil Operator | Apr 2025 |
| 47 | Sooner Exploration & Development Co Inc | Enid, OK 73702-3525 | Oil & Gas Operator | Oct 2023 |
| 48 | Sooner Trend Exploration Inc | Kingfisher, OK 73750-4752 | Oil & Gas Operator | Dec 2015 |
| 49 | Southerland Jackie Dale Dba Skyden Oil | Duncan, OK 73533-5392 | Oil & Gas Operator | Apr 2025 |
| 50 | Southerland Joe Don Dba Taylor Oil Co | Duncan, OK 73533 | Oil & Gas Operator | Apr 2025 |
| 51 | Southerland Marquieta Dba Keta Oil Company | Loco, OK 73442 | Oil & Gas Operator | Apr 2025 |
| 52 | Southern Production Co | Madill, OK 73446 | Oil & Gas Operator | Feb 2025 |
| 53 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 54 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 55 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Apr 2025 |
| 56 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 57 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Apr 2025 |
| 58 | Sparrow Operating LLC | Comanche, OK 73529-9747 | Oil Operator | Apr 2025 |
| 59 | Spartan Resources LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 60 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Jun 2025 |
| 61 | Spectrum Field Services Inc | Tulsa, OK 74136-3400 | Oil & Gas Operator | Jan 2004 |
| 62 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Apr 2025 |
| 63 | Spitfire Energy Group LLC | Oklahoma City, OK 73114-7444 | Oil Operator | Apr 2023 |
| 64 | Splawn & Splawn | Saint Louis, OK 74866-0098 | Oil & Gas Operator | Mar 2025 |
| 65 | Spragins Ed S | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 66 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Apr 2025 |
| 67 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Jun 2025 |
| 68 | Spur Operating Co. | Austin, TX 78701 | Oil & Gas Operator | Jun 2025 |
| 69 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 70 | SSB Production LC | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2025 |
| 71 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 72 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 73 | Stamic Oil LLC | Duncan, OK 73534-1898 | Oil & Gas Operator | Oct 2021 |
| 74 | Staub, Larry, Inc. | Azle, TX 76020 | Oil & Gas Operator | Jun 2025 |
| 75 | Steele VIctor Patterson | Wewoka, OK 74884-0560 | Oil & Gas Operator | Jan 2001 |
| 76 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2025 |
| 77 | Stephens Production Company | The Woodlands, TX 77381 | Oil & Gas Operator | Apr 2025 |
| 78 | Stesco Operating Company LLC | Oklahoma City, OK 73120 | Oil & Gas Operator | Mar 2025 |
| 79 | Stone River Energy Corp | Edmond, OK 73034 | Oil & Gas Operator | Jan 2014 |
| 80 | Stoneriver Energy, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Jun 2025 |
| 81 | Streamline Oil And Gas Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2025 |
| 82 | Stromquist C Dale | Liberal, KS 67901-2428 | Oil & Gas Operator | Jun 2006 |
| 83 | Sudberry Mark E Dba Gushing Oil Co | Trophy Club, TX 76262-5531 | Oil Operator | Jan 2020 |
| 84 | Sullivan Wesley L | Duncan, OK 73533 | Oil & Gas Operator | Mar 2002 |
| 85 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Jun 2025 |
| 86 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Feb 2025 |
| 87 | Sunset Energy L L C | Palm Harbor, FL 34683-3044 | Oil Operator | Dec 2007 |
| 88 | Sunstone Energy Company | Tulsa, OK 74153 | Oil & Gas Operator | Aug 2009 |
| 89 | Surge Ok Midstream LLC | Oklahoma City, OK 73114 | Oil Operator | Apr 2025 |
| 90 | Sutton Eddie L Oil Company | Loco, OK 73442-9701 | Oil Operator | Mar 2025 |
| 91 | Sutton Oil Company, LLC | Loco, OK 73442 | Oil Operator | Mar 2025 |
| 92 | Swanson G T | Duncan, OK 73533 | Oil & Gas Operator | Nov 1998 |
| 93 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Mar 2025 |
| 94 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 95 | SWS Operating LLC | Lawton, OK 73501-3236 | Oil Operator | Sep 2024 |
| 96 | Sydson D'Oro Expl. Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 1992 |