| 9501 | RTD Inc | Bartlesville, OK 74006 | Oil Operator | Jan 1995 |
| 9502 | RTD Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 9503 | Rto Operating, LLC | San Antonio, TX 78212 | Oil Operator | Feb 2016 |
| 9504 | RTZ Energy, LLC | Kilgore, TX 75663 | Gas Operator | Apr 2006 |
| 9505 | Rubicon Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2026 |
| 9506 | Rubis Oil, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2026 |
| 9507 | Ruby Operating Company, Inc | Clyde, TX 79510 | Oil & Gas Operator | Jun 2026 |
| 9508 | Rucker, Gary | Archer City, TX 76351 | Oil & Gas Operator | Dec 2003 |
| 9509 | Ruckus Energy Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Jun 2026 |
| 9510 | Rudman Partnership, The | Dallas, TX 75201 | Oil & Gas Operator | Dec 2014 |
| 9511 | Ruff | Albany, TX 76430 | Oil & Gas Operator | Aug 2017 |
| 9512 | Ruff Drilling Company | Albany, TX 76430 | Oil & Gas Operator | Dec 2019 |
| 9513 | Ruff Oil Co. | Albany, TX 76430 | Oil Operator | Jun 2026 |
| 9514 | Rumble Energy LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jun 2026 |
| 9515 | Runion Oil, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Aug 2003 |
| 9516 | Running WP Oil, LLC | Loving, TX 76460 | Oil Operator | Jun 2026 |
| 9517 | Rush Creek Operating LLC | McKinney, TX 75070 | Oil & Gas Operator | Jun 2026 |
| 9518 | Rush, Charles Ray | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 9519 | Rushing Oil Co. | San Antonio, TX 78213 | Oil & Gas Operator | Jun 2026 |
| 9520 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 9521 | Rusk Energy Management, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2008 |
| 9522 | Rusk Energy Operating LLC | Houston, TX 77040 | Oil & Gas Operator | Jun 2026 |
| 9523 | Rusk Production Inc. | Iowa Park, TX 76367 | Oil & Gas Operator | Jun 2026 |
| 9524 | Russell - FT. Trinidad Op., LLC | Tyler, TX 75710 | Oil & Gas Operator | Jun 2026 |
| 9525 | Russell Bros. Oil & Gas, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 9526 | Russell Brothers Oil & Gas | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2004 |
| 9527 | Russell Operating Company, LLC | Big Lake, TX 76932 | Oil Operator | Jun 2026 |
| 9528 | Russell, C. M. Oil Company | Lubbock, TX 79423 | Oil & Gas Operator | Jan 2008 |
| 9529 | Russell, L. J. Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2026 |
| 9530 | Russell, Phillip | Colorado City, TX 79512 | Oil & Gas Operator | Jun 2026 |
| 9531 | Russell, T. Operating Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Aug 2005 |
| 9532 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2026 |
| 9533 | Rust Operating Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Feb 2000 |
| 9534 | Ruth Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2010 |
| 9535 | Rutherford Oil Corporation | Houston, TX 77046 | Oil & Gas Operator | Jun 2019 |
| 9536 | Rutherford, Michael A. | Dallas, TX 75381 | Oil & Gas Operator | May 2000 |
| 9537 | Ruthson Energy, Inc. | Judson, TX 75660 | Oil Operator | Jun 2026 |
| 9538 | Rutledge, Kenny | Rising Star, TX 76471 | Oil & Gas Operator | Jun 2026 |
| 9539 | Rutledge, Rome | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 1997 |
| 9540 | Rutledge-Newsom | Graham, TX 76450 | Oil Operator | Jun 2025 |
| 9541 | Ruwco Oil And Gas Corp. | Austin, TX 78701 | Oil & Gas Operator | Aug 2021 |
| 9542 | RVR Operating Co. | Bedford, TX 76021 | Oil & Gas Operator | Jan 2017 |
| 9543 | RW Operating Corp. | Midland, TX 79702 | Oil & Gas Operator | Jul 2016 |
| 9544 | Rwa Corporation | Houston, TX 77024 | Oil & Gas Operator | Sep 1999 |
| 9545 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | Jun 2026 |
| 9546 | RWJ Operating LLC | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |
| 9547 | RWS Operating Co. LLC | Kilgore, TX 75663 | Oil Operator | Jun 2026 |
| 9548 | Ryan, Joseph G. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 9549 | Ryann Operating, LLC | Waller, TX 77484 | Oil & Gas Operator | Jun 2026 |
| 9550 | Ryder Scott Management, LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2018 |
| 9551 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 9552 | Ryholland Fielder, Inc | Delray Beach, FL 33446 | Oil & Gas Operator | Jun 2026 |
| 9553 | Rystin Oil & Gas | Sugar Land, TX 77487 | Oil & Gas Operator | Jun 2026 |
| 9554 | S & B Operating, LLC | Iowa Park, TX 76367 | Oil Operator | Jun 2026 |
| 9555 | S & C Construction, Inc. | Whitefish, MT 59937 | Oil & Gas Operator | Oct 2025 |
| 9556 | S & H Oil Company | Vernon, TX 76384 | Oil & Gas Operator | Sep 1999 |
| 9557 | S & H Resources | Abilene, TX 79605 | Oil & Gas Operator | Jun 2026 |
| 9558 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 9559 | S & JB, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Jul 2010 |
| 9560 | S & L Oil Field Services | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Jan 1999 |
| 9561 | S & M Drilling, LLC | Wichita Falls, TX 76308 | Oil Operator | Sep 2023 |
| 9562 | S & M Royalty | Andrews, TX 79714 | Oil & Gas Operator | Jan 1997 |
| 9563 | S & N Energies, Inc. | Amarillo, TX 79109 | Oil & Gas Operator | Jun 2002 |
| 9564 | S & P Energy | Benbrook, TX 76126 | Oil & Gas Operator | Oct 1994 |
| 9565 | S & P Energy, Inc. | Benbrook, TX 76126 | Oil & Gas Operator | Aug 2003 |
| 9566 | S & R Oil Company | Electra, TX 76360 | Oil & Gas Operator | Apr 1993 |
| 9567 | S & R Operating | Merkel, TX 79536 | Oil & Gas Operator | Mar 2008 |
| 9568 | S & S & H Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Jul 2004 |
| 9569 | S & S Energy | Englewood, CO 80112 | Oil & Gas Operator | Mar 2015 |
| 9570 | S & S Oil Company | Electra, TX 76360 | Oil & Gas Operator | Jun 2026 |
| 9571 | S & S Operating | Dumas, TX 79029 | Oil Operator | Jun 2026 |
| 9572 | S & S Operating Company, Inc. | Winnie, TX 77665 | Oil & Gas Operator | Jun 2026 |
| 9573 | S & S Well Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Aug 1998 |
| 9574 | S & T Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2001 |
| 9575 | S & V Operating | Zephyr, TX 76890 | Oil & Gas Operator | Jun 2026 |
| 9576 | S & W Oil & Gas, LLC | Pampa, TX 79066 | Oil & Gas Operator | Jun 2026 |
| 9577 | S & Y Production Co. | Liberty, TX 77575 | Oil & Gas Operator | Jul 1996 |
| 9578 | S And B Gauging Services, LLC | Spring, TX 77386 | Oil Operator | Jun 2026 |
| 9579 | S M K Energy Corporation | Corpus Chrsti, TX 78475 | Oil & Gas Operator | Jun 2026 |
| 9580 | S N D Energy Company, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 2026 |
| 9581 | S&G Oil LLC | Wichita Falls, TX 76309 | Oil & Gas Operator | Jun 2026 |
| 9582 | S&JB, LLC | Rockdale, TX 76567 | Oil & Gas Operator | Jun 2026 |
| 9583 | S&S Heidrich | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2017 |
| 9584 | S-Resources, LLC | Industry, TX 78944 | Oil Operator | Jun 2026 |
| 9585 | S. A. Oil Account | Borger, TX 79008 | Oil & Gas Operator | Dec 1997 |
| 9586 | S. M. A. Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1997 |
| 9587 | S. P. Penntex Energy, L.P. | Abilene, TX 79605 | Oil & Gas Operator | May 2003 |
| 9588 | S. P. Y. Oil Co. | Batson, TX 77519 | Oil & Gas Operator | Mar 2002 |
| 9589 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 9590 | S.E.D.I. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2015 |
| 9591 | S.O.C. Investors, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2026 |
| 9592 | S.U.E. Company | Abilene, TX 79604 | Oil Operator | Jan 1998 |
| 9593 | S2 Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2023 |
| 9594 | S2 Oil, LLC | San Angelo, TX 76901 | Oil & Gas Operator | Jun 2026 |
| 9595 | S2 Oil, LLC (1) | Albany, TX 76430 | Oil Operator | Jun 2026 |
| 9596 | Saba Energy Of Texas Inc | Houston, TX 77042 | Oil & Gas Operator | Jul 2007 |
| 9597 | Sabalo Exploration Operating,LLC | Corpus Christ, TX 78404 | Oil & Gas Operator | Jan 2021 |
| 9598 | Sabalo II Operating, LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Jun 2026 |
| 9599 | Sabalo Operating, LLC | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Jun 2021 |
| 9600 | Sabco Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2011 |