| 401 | Sooner Oilfield Services Inc | Piedmont, OK 73078-0810 | Oil & Gas Operator | May 2024 |
| 402 | Sooner Pipe & Supply Corp | | Oil & Gas Operator | Nov 2004 |
| 403 | Sooner Trend Exploration Inc | Kingfisher, OK 73750-4752 | Oil & Gas Operator | Dec 2015 |
| 404 | Sopac Exploration Inc | Drumright, OK 74030 | Oil & Gas Operator | Jun 1993 |
| 405 | Sorrels J R Dba Cheyenne Oil Properties | Ponca City, OK 74601 | Oil & Gas Operator | Jul 2022 |
| 406 | South Burbank Petroleum Corporation | Midland, TX 79707-9027 | Oil Operator | Feb 2010 |
| 407 | South Forty, The, Inc. | Laverne, OK 73848 | Oil & Gas Operator | Mar 2015 |
| 408 | South Ranch Corporation | Midland, TX 79707 | Oil Operator | Sep 2019 |
| 409 | South Ranch Oil Company Inc | St. Louis, MO 63124 | Oil Operator | Sep 1996 |
| 410 | South Sands Exploration LLC | Henryetta, OK 74437-4208 | Oil & Gas Operator | Aug 2024 |
| 411 | Southbrook Energies Inc | Tulsa, OK 74153 | Oil Operator | Feb 2004 |
| 412 | Southcreek Petroleum Co LLC | Blanchard, OK 73010-4911 | Oil & Gas Operator | Jul 2024 |
| 413 | Southerland Jackie Dale Dba Skyden Oil | Duncan, OK 73533-5392 | Oil & Gas Operator | Aug 2024 |
| 414 | Southerland Joe Don Dba Taylor Oil Co | Duncan, OK 73533 | Oil & Gas Operator | Aug 2024 |
| 415 | Southerland Marquieta Dba Keta Oil Company | Loco, OK 73442-1815 | Oil & Gas Operator | Aug 2024 |
| 416 | Southern Int'L Inc | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2007 |
| 417 | Southern Management Inc | Camargo, OK 73835 | Oil Operator | Jun 1992 |
| 418 | Southern Mineral Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2001 |
| 419 | Southern Oklahoma Production | Wilson, OK 73463-6537 | Oil Operator | Sep 2024 |
| 420 | Southern Operating Corporation | Broken Arrow, OK 74014 | Oil & Gas Operator | May 2013 |
| 421 | Southern Production Co | Healdton, OK 73438-0400 | Oil & Gas Operator | Jul 2024 |
| 422 | Southern Resources Inc | Oklahoma City, OK 73118-4821 | Oil & Gas Operator | Sep 2024 |
| 423 | Southern Star Central Gas Pipeline, Inc. | Owensboro, KY 42301 | Oil & Gas Operator | Aug 2024 |
| 424 | Southern Star Operating LLC | Provo, UT 84604-7714 | Oil & Gas Operator | Jun 2017 |
| 425 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 426 | Southfourk Partners LLC | Blanchard, OK 73010-7209 | Oil Operator | Aug 2024 |
| 427 | Southland Energy Corporation | Houston, TX 77060 | Oil & Gas Operator | Aug 2022 |
| 428 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 429 | Southport Exploration Inc | Tulsa, OK 74103-4015 | Oil & Gas Operator | Nov 1998 |
| 430 | Southstar Energy Corporation | Ardmore, OK 73401 | Gas Operator | Aug 1990 |
| 431 | Southstar Oil And Gas Inc | Andover, KS 67002-0123 | Oil & Gas Operator | Jul 2020 |
| 432 | Southwest Energy Development Inc | Bison, OK 73720 | Oil & Gas Operator | Aug 2024 |
| 433 | Southwest Energy LP | Houston, TX 77002 | Oil & Gas Operator | Aug 2024 |
| 434 | Southwest Exploration Company | Oklahoma City, OK 73132-2230 | Oil & Gas Operator | Jun 2017 |
| 435 | Southwest Petroleum Corp | Drumright, OK 74030 | Oil & Gas Operator | Mar 2018 |
| 436 | Southwest Petroleum Oil & Gas Explor LLC | San Bernardino, CA 92404-1010 | Oil & Gas Operator | Jun 2022 |
| 437 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Nov 2024 |
| 438 | Southwestern Exploration Consultants Inc | Oklahoma City, OK 73118-1116 | Oil & Gas Operator | Sep 2024 |
| 439 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 440 | Spark'S Energy Inc | Perry, OK 73077 | Oil & Gas Operator | Nov 2014 |
| 441 | Sparkman Rodger E | Jenks, OK 74037-0267 | Oil Operator | Sep 2018 |
| 442 | Sparks Daniel M | Chickasha, OK 73023-1435 | Oil & Gas Operator | Apr 2014 |
| 443 | Sparks Greg | Afton, OK 74331 | Oil & Gas Operator | Sep 2024 |
| 444 | Sparks Mick Oil Company Inc | Jennings, OK 74038-0250 | Oil & Gas Operator | Aug 2024 |
| 445 | Sparks Petroleum Company | Oklahoma City, OK 73128 | Oil & Gas Operator | Mar 1998 |
| 446 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Sep 2024 |
| 447 | Sparlin J L | Oklahoma City, OK 73156-1446 | Oil Operator | Sep 2024 |
| 448 | Sparrow Operating LLC | Comanche, OK 73529-9747 | Oil Operator | Aug 2024 |
| 449 | Sparta Energy LLC | Edmond, OK 73083-8158 | Oil & Gas Operator | May 2020 |
| 450 | Spartan Resources LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Sep 2024 |
| 451 | Spearpoint Energy LLC | Seminole, OK 74818-1247 | Oil Operator | Jun 2015 |
| 452 | Spears Terry | Osage, OK 74054 | Oil Operator | Aug 2024 |
| 453 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | Nov 2024 |
| 454 | Spectrum Energy Inc | Scottsdale, AZ 85257 | Oil & Gas Operator | Oct 2003 |
| 455 | Spectrum Field Services Inc | Tulsa, OK 74136-3400 | Oil & Gas Operator | Jan 2004 |
| 456 | Spectrum Oil Company | Irving, TX 75063 | Oil & Gas Operator | May 2013 |
| 457 | Speed James F | Ada, OK 74821-1221 | Oil & Gas Operator | Nov 2009 |
| 458 | Speer Kenneth G | Seminole, OK 74818-1202 | Oil & Gas Operator | Dec 2001 |
| 459 | Speir R M Operating Company | Walters, OK 73572-3933 | Oil Operator | Aug 2024 |
| 460 | Speller Oil Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Aug 2024 |
| 461 | Spencer Kevin LLC | Drumright, OK 74030-5825 | Oil & Gas Operator | Sep 2019 |
| 462 | Spencer Oil Company | Borger, TX 79007 | Oil & Gas Operator | Sep 2024 |
| 463 | Spencer Oil Company LLC | Bartlesville, OK 74006 | Oil Operator | Jan 2015 |
| 464 | Sperry R J | Dallas, TX 75254-8647 | Oil & Gas Operator | Aug 2013 |
| 465 | Spess Oil Company Inc | Cleveland, OK 74020-4617 | Oil & Gas Operator | Sep 2024 |
| 466 | Spicer Oil Company, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2008 |
| 467 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Nov 2024 |
| 468 | Spirit Energy Inc | Edmond, OK 73034 | Oil & Gas Operator | Apr 1999 |
| 469 | Spitfire Energy Group LLC | Oklahoma City, OK 73114-7444 | Oil Operator | Apr 2023 |
| 470 | Splawn & Splawn | Saint Louis, OK 74866-0098 | Oil & Gas Operator | Jun 2024 |
| 471 | Spragins Ed S | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2024 |
| 472 | Spring Operating Company | Edmond, OK 73034 | Oil & Gas Operator | Sep 2024 |
| 473 | Spring Resources, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2007 |
| 474 | Spring Tide Petroleum Inc | Broken Arrow, OK 74011-6651 | Oil & Gas Operator | Jul 2024 |
| 475 | Spring Valley Oil & Gas Inc | Drummond, OK 73735 | Oil & Gas Operator | Sep 2024 |
| 476 | Spruiell Drilling Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Nov 2024 |
| 477 | Spur Operating Co. | Austin, TX 78701 | Oil & Gas Operator | Nov 2024 |
| 478 | Spurgeon William Allan | Nowata, OK 74048-9713 | Oil Operator | Feb 2010 |
| 479 | Spurgeon William C & Tammy D | Hominy, OK 74035 | Oil & Gas Operator | Sep 2024 |
| 480 | Squirrel Oil & Gas Inc | Tonkawa, OK 74653 | Oil & Gas Operator | Mar 2022 |
| 481 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 482 | SSB Production LC | Ardmore, OK 73401 | Oil & Gas Operator | Aug 2024 |
| 483 | St Oil Company LLC | New York, NY 10005-4016 | Oil Operator | Aug 2024 |
| 484 | St. Johns Operating #1 L.P. | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 485 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 486 | Staab Alan R | Tulsa, OK 74114-4213 | Oil & Gas Operator | Sep 2010 |
| 487 | Staats & Martin | | Oil Operator | Aug 2013 |
| 488 | Staats, William N | | Oil & Gas Operator | Jun 2024 |
| 489 | Stacy Operating LLC | Cushing, OK 74023 | Oil & Gas Operator | Aug 2024 |
| 490 | Staghorn Energy, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2024 |
| 491 | Staghorn Petroleum II LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Sep 2024 |
| 492 | Staghorn Petroleum LLC | Tulsa, OK 74103-3500 | Oil & Gas Operator | Aug 2024 |
| 493 | Staghorn Resources, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2015 |
| 494 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 495 | Stalnaker Oil Company | Maud, OK 74854-0295 | Oil Operator | May 2017 |
| 496 | Stalwart Energy Co | Tulsa, OK 74103-3518 | Oil & Gas Operator | Apr 2014 |
| 497 | Stamic Oil LLC | Duncan, OK 73534-1898 | Oil & Gas Operator | Oct 2021 |
| 498 | Standard Energy Inc | | Oil Operator | Feb 1997 |
| 499 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 500 | Stanton Joni Dba Stanton Oil | Wynona, OK 74084 | Oil Operator | Sep 2024 |