| 2501 | Struthoff Energy, L.L.C. | San Antonio, TX 78216 | Oil Operator | Jun 2026 |
| 2502 | Stryker Energy Corp. | Mesquite, TX 75180 | Oil & Gas Operator | Jun 2026 |
| 2503 | Stryker Energy LLC | Mayfield VIllag, OH 44143 | Oil & Gas Operator | Dec 2018 |
| 2504 | STS Petroleum LLC | Houston, TX 77289 | Oil & Gas Operator | Jun 2026 |
| 2505 | Stuart & Barrett | San Angelo, TX 76904 | Gas Operator | Jan 2008 |
| 2506 | Stuart Oil | | Oil Operator | Jan 2025 |
| 2507 | Stuart Oil & Gas | Longview, TX 75606 | Oil & Gas Operator | Jun 2026 |
| 2508 | Stuart Operating, LLC | Ozona, TX 76943 | Oil & Gas Operator | Jun 2026 |
| 2509 | Stubblefield Energy Company | Abilene, TX 79606 | Oil & Gas Operator | Jun 2026 |
| 2510 | Stubbs & Fleming, A General Partnership | Wichita, KS 67202 | Oil Operator | Jul 2005 |
| 2511 | Stubbs Operating Co. | Archer City, TX 76351 | Oil & Gas Operator | Aug 1998 |
| 2512 | Stubbs, J. W. | Suwanee, GA 30024 | Oil & Gas Operator | Mar 2008 |
| 2513 | Stuber, VIrgil | Eureka, KS 67045 | Oil Operator | Dec 2019 |
| 2514 | Stucky Oil Compa | | Oil Operator | Mar 1988 |
| 2515 | Stucky, Edward P. | Sabetha, KS 66534 | Oil Operator | May 1992 |
| 2516 | Stucky, Kenneth R. Oil & Gas Operations | Burrton, KS 67020 | Oil & Gas Operator | Aug 2002 |
| 2517 | Studer Oil Co. | Pratt, KS 67124 | Oil Operator | Oct 2019 |
| 2518 | Studer Oil Compa | | Oil & Gas Operator | Feb 1993 |
| 2519 | Studley Resources Corporation | Humble, TX 77347 | Oil & Gas Operator | Dec 1996 |
| 2520 | Studley, Richard | Gowanda, NY 14070 | Gas Operator | Dec 2024 |
| 2521 | Studley, Robert SR. & Robert Jr. | Gowanda, NY 14070 | Gas Operator | Dec 2024 |
| 2522 | Stull Crude Co, LLC | | Oil Operator | Feb 2026 |
| 2523 | Stull Oil LLC | Natoma, KS 67651 | Oil Operator | Feb 2026 |
| 2524 | Stults, Joe K. | Archer City, TX 76351 | Oil & Gas Operator | Mar 2007 |
| 2525 | Stumpff Paul | Bartlesville, OK 74006-3426 | Oil & Gas Operator | Mar 2015 |
| 2526 | Sturgeon Point Development Co | | Gas Operator | Jun 2019 |
| 2527 | Sturman Jay R | Mounds, OK 74047 | Oil & Gas Operator | Aug 2025 |
| 2528 | Stuteville Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Aug 2004 |
| 2529 | Stuteville, Jack | Olney, TX 76374 | Oil Operator | Jun 2026 |
| 2530 | Stydahar Oil & Gas Co. | | Oil & Gas Operator | Dec 2021 |
| 2531 | STZ Petroleum Inc. | Houston, TX 77268 | Oil & Gas Operator | Dec 1997 |
| 2532 | Sub Surface Operations | Brownwood, TX 76804 | Oil & Gas Operator | Jun 2026 |
| 2533 | Sublette Feeders LLC | Sublette, KS 67877 | Gas Operator | Feb 2026 |
| 2534 | Suborp Energy, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Sep 2000 |
| 2535 | Subsea Operating Co. | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 2536 | Subsurface Energy Corp. | Coleman, TX 76834 | Oil & Gas Operator | Jun 2026 |
| 2537 | Subsurface Energy, Inc. | | Oil & Gas Operator | Oct 2015 |
| 2538 | Subsurface Exploration | Coleman, TX 76834 | Oil & Gas Operator | Apr 2006 |
| 2539 | Subsurface Minerals Group LLC | Tulsa, OK 74119-1635 | Oil & Gas Operator | Jan 2013 |
| 2540 | Subsurface Production, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Jun 2026 |
| 2541 | Subsurface Resources Inc | Logan, UT 84321 | Oil & Gas Operator | Aug 1990 |
| 2542 | Subterranean Energy, LLC | Tyler, TX 75705 | Oil & Gas Operator | Jun 2026 |
| 2543 | Suburban Propane Expl Co, Inc. | | Oil & Gas Operator | Jun 1983 |
| 2544 | Suburban Propane Gas Corp. | | Oil & Gas Operator | Sep 1980 |
| 2545 | Success Oil Company, Inc. | Beverly Hills, CA 90211 | Oil & Gas Operator | Jun 2026 |
| 2546 | Sudberry Mark E Dba Gushing Oil Co | Trophy Club, TX 76262-5531 | Oil Operator | Jan 2020 |
| 2547 | Sue-Ann Operating, L.C. | Victoria, TX 77903 | Oil & Gas Operator | Jun 2026 |
| 2548 | Sue-Ann Production Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 2549 | Suemaur Expl. & Prod., LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Jun 2024 |
| 2550 | Suemaur Exploration, Inc. | Corpus Chrsti, TX 78470 | Oil & Gas Operator | Mar 2008 |
| 2551 | Suemaur Operating LLC | Corpus Christ, TX 78401 | Oil & Gas Operator | Jun 2026 |
| 2552 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Mar 2025 |
| 2553 | Suerte Oil Compa | | Oil & Gas Operator | Oct 1995 |
| 2554 | Suerte Oil Company | Howard, KS 67349 | Oil & Gas Operator | Jan 2017 |
| 2555 | Sugar Bowl Gas Corp. | | Oil Operator | Dec 1983 |
| 2556 | Sugar Bowl Industrial Gas Corp | | Oil Operator | Dec 1983 |
| 2557 | Sugar Creek Environmental, LLC | | Oil Operator | Jan 2025 |
| 2558 | Sugar Creek Producing Company | | Oil & Gas Operator | Dec 2010 |
| 2559 | Sugar Creek Producing Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 2560 | Sugar Enterprises, LLC | Tyler, TX 75713 | Oil & Gas Operator | Jun 2026 |
| 2561 | Sugar Oil Company | | Oil & Gas Operator | Feb 2011 |
| 2562 | Sugar Rock Incorporated | | Oil & Gas Operator | Dec 2021 |
| 2563 | Suits & Jeans, LLC | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 2564 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 2565 | Sukay Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2003 |
| 2566 | Sullivan & Clark | Youngsville, PA 16371-0194 | Oil & Gas Operator | Dec 1998 |
| 2567 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 2568 | Sullivan - Wells | Amarillo, TX 79101 | Gas Operator | Jun 2026 |
| 2569 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2026 |
| 2570 | Sullivan Jesse G | Duncan, OK 73533 | Oil Operator | May 1998 |
| 2571 | Sullivan Nora M | Oklahoma City, OK 73139 | Oil Operator | Jan 1997 |
| 2572 | Sullivan Well Service | | Oil Operator | Mar 2010 |
| 2573 | Sullivan Wesley L | Duncan, OK 73533 | Oil & Gas Operator | Mar 2002 |
| 2574 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 2575 | Sullivant G W | Oklahoma City, OK 73172-1135 | Oil & Gas Operator | Aug 2001 |
| 2576 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | Jun 2026 |
| 2577 | Sultex Oil & Gas Inc | Houston, TX 77059-3126 | Oil & Gas Operator | Aug 2002 |
| 2578 | Summa Engineering Inc | Oklahoma City, OK 73112-3624 | Oil & Gas Operator | Mar 2015 |
| 2579 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 2580 | Summers Exploration Company | Midland, TX 79701 | Oil & Gas Operator | Dec 2002 |
| 2581 | Summers, Esther B. | Midland, MI 48640 | Gas Operator | Dec 2024 |
| 2582 | Summit Appalachia Operating Company, LLC | | Gas Operator | Dec 2021 |
| 2583 | Summit Discovery Res II LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2019 |
| 2584 | Summit Energy Company | | Oil & Gas Operator | Mar 2009 |
| 2585 | Summit Energy LLC | | Oil & Gas Operator | Feb 2026 |
| 2586 | Summit Energy,Inc | Littleton, CO 80127 | Oil & Gas Operator | Aug 2013 |
| 2587 | Summit Essexville Inc | | Oil Operator | Dec 2014 |
| 2588 | Summit Exploration (California) LLC | | Oil & Gas Operator | Feb 2018 |
| 2589 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 2590 | Summit Gas LLC | | Oil & Gas Operator | Oct 2011 |
| 2591 | Summit Gas Resources Inc | Sheridan, WY 82801 | Gas Operator | Dec 2023 |
| 2592 | Summit Oil & Gas, LLC | | Oil & Gas Operator | Nov 2024 |
| 2593 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Feb 2026 |
| 2594 | Summit Overseas Expl., Inc. | Lakewood, CO 80226 | Oil & Gas Operator | Apr 2007 |
| 2595 | Summit Petroleum Corp And Muskegon Development C | | Oil Operator | Dec 2006 |
| 2596 | Summit Petroleum Corp Of MT Pleasant | | Oil & Gas Operator | Dec 2007 |
| 2597 | Summit Petroleum Inc | Twinsburg, OH 44087 | Oil & Gas Operator | Dec 2025 |
| 2598 | Summit Petroleum LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 2599 | Summit Reed City Inc | | Oil Operator | Dec 2014 |
| 2600 | Summit Resources Management LLC | Edmond, OK 73083 | Oil & Gas Operator | Feb 2026 |