| 918904Amendment | Oct 30, 2026 | Sep 24, 2026 | Southwest Operating, Inc.-Tyler | Titus | Hughes #1 | 11,775 | 44930678 |
| 918904 | Sep 26, 2026 | Sep 24, 2026 | Southwest Operating, Inc.-Tyler | Titus | Hughes #1 | 11,775 | 44930678 |
| 918728 | Sep 24, 2026 | Sep 22, 2026 | Southwest Operating, Inc.-Tyler | Limestone | NM 1011 #1 HH | 5,017 | 29332429 |
| 909779 | Aug 12, 2025 | Aug 12, 2025 | Southwest Operating, Inc.-Tyler | Van Zandt | Rowan #1 | 5,852 | 46730715 |
| 906945 | Mar 28, 2025 | Mar 28, 2025 | Southwest Operating, Inc.-Tyler | Smith | Kickapoo Creek Gas Unit #5 | 11,886 | 42331708 |
| 902232 | Sep 19, 2024 | Sep 19, 2024 | Southwest Operating, Inc.-Tyler | Madison | Fannin, M.G. #5 | 8,710 | 31330515 |
| 902232Amendment | Sep 19, 2024 | Sep 19, 2024 | Southwest Operating, Inc.-Tyler | Madison | Fannin, M.G. #5 | 8,710 | 31330515 |
| 902178Amendment | Sep 19, 2024 | Sep 19, 2024 | Southwest Operating, Inc.-Tyler | Freestone | Keyes #2 | 5,500 | 16134867 |
| 890382 | May 25, 2023 | May 25, 2023 | Southwest Operating, Inc.-Tyler | Franklin | Lundell Creek #1 | 12,950 | 15930643 |
| 889865 | Apr 24, 2023 | Apr 24, 2023 | Southwest Operating, Inc.-Tyler | Hopkins | Pine Forest #1 | 12,950 | 22330520 |
| 885864 | Dec 8, 2022 | Dec 8, 2022 | Southwest Operating, Inc.-Tyler | Franklin | Davis HRS #1 | 13,000 | 15930642 |
| 879143 | May 9, 2022 | May 9, 2022 | Southwest Operating, Inc.-Tyler | Wood | Monte JO Winkle #2 | 4,500 | 49932204 |
| 876624 | Feb 17, 2022 | Feb 17, 2022 | Southwest Operating, Inc.-Tyler | Wood | Pittman, E. N. Etal #10 | 6,500 | 49932200 |
| 876623 | Feb 10, 2022 | Feb 10, 2022 | Southwest Operating, Inc.-Tyler | Wood | Noe, J. L. #8 | 6,500 | 49932199 |
| 874852 | Dec 6, 2021 | Dec 6, 2021 | Southwest Operating, Inc.-Tyler | Limestone | NM 1213 #2H | 4,100 | 29332413 |
| 871376 | Jul 22, 2021 | Jul 22, 2021 | Southwest Operating, Inc.-Tyler | Wood | Monte JO Winkle #1 | 4,500 | 49932193 |
| 868696 | Apr 1, 2021 | Apr 1, 2021 | Southwest Operating, Inc.-Tyler | Freestone | Ingram Trinity SWD #51 | 4,835 | 16130608 |
| 864394 | Aug 10, 2020 | Aug 10, 2020 | Southwest Operating, Inc.-Tyler | Limestone | NM 1213 #2 | 3,040 | 29332413 |
| 847381 | Dec 4, 2018 | Dec 4, 2018 | Southwest Operating, Inc.-Tyler | Rusk | Townley Lumber #1 | 4,500 | 40135427 |
| 836245 | Feb 20, 2018 | Feb 20, 2018 | Southwest Operating, Inc.-Tyler | Smith | Hampton #1 | 7,800 | 42332409 |
| 834333 | Dec 15, 2017 | Dec 15, 2017 | Southwest Operating, Inc.-Tyler | Wood | Lee Stewart #1 | 10,800 | 49931365 |
| 820621 | Dec 1, 2016 | Dec 1, 2016 | Southwest Operating, Inc.-Tyler | Smith | Tom Slick #1 | 4,500 | 42332390 |
| 813511 | Feb 5, 2016 | Feb 5, 2016 | Southwest Operating, Inc.-Tyler | Wood | Pittman, Maude #2 | 4,500 | 49932122 |
| 795360 | Oct 10, 2014 | Oct 10, 2014 | Southwest Operating, Inc.-Tyler | Wood | Noe, H. H. #1 | 9,500 | 49931940 |
| 790948 | Aug 6, 2014 | Aug 6, 2014 | Southwest Operating, Inc.-Tyler | Wood | Noe, H. H. #2 | 4,500 | 49932127 |
| 771813 | Oct 26, 2013 | Oct 26, 2013 | Southwest Operating, Inc.-Tyler | Wood | H. H. Noe #3 | 4,300 | 49932142 |
| 771813Amendment | Oct 26, 2013 | Oct 26, 2013 | Southwest Operating, Inc.-Tyler | Wood | Noe, H. H. #3 | 4,300 | 49932142 |
| 771813Amendment | Oct 26, 2013 | Oct 26, 2013 | Southwest Operating, Inc.-Tyler | Wood | Noe, H. H. #3 | 4,700 | 49932142 |
| 749595 | Oct 16, 2012 | Oct 16, 2012 | Southwest Operating, Inc.-Tyler | Wood | Radney #3 | 6,500 | 49932128 |
| 749418 | Oct 12, 2012 | Oct 12, 2012 | Southwest Operating, Inc.-Tyler | Wood | H. H. Noe #2 | 4,200 | 49932127 |
| 741620 | Aug 2, 2012 | Aug 2, 2012 | Southwest Operating, Inc.-Tyler | Wood | Pittman, Maude #2 | 4,500 | 49932122 |
| 720176 | Jul 15, 2011 | Jul 15, 2011 | Southwest Operating, Inc.-Tyler | Wood | Goldsmith #7 | 4,800 | 49932109 |
| 705656 | Nov 22, 2010 | Nov 22, 2010 | Southwest Operating, Inc.-Tyler | Smith | Jarvis #1 | 7,400 | 42332291 |
| 701686 | Sep 10, 2010 | Sep 10, 2010 | Southwest Operating, Inc.-Tyler | Cass | Graham #1 | 8,000 | 06730763 |
| 696303 | May 21, 2010 | May 21, 2010 | Southwest Operating, Inc.-Tyler | Smith | Shamgar #1 | 7,000 | 42332281 |
| 692644Amendment | Mar 18, 2010 | Mar 18, 2010 | Southwest Operating, Inc.-Tyler | Anderson | Flynn #1 | 7,000 | 00132683 |
| 692509 | Mar 9, 2010 | Mar 9, 2010 | Southwest Operating, Inc.-Tyler | Smith | Holmes Estate #1 | 7,000 | 42332276 |
| 689718 | Jan 14, 2010 | Jan 14, 2010 | Southwest Operating, Inc.-Tyler | Smith | Kidd-Dale #2 | 7,000 | 42332273 |
| 686753 | Nov 3, 2009 | Nov 3, 2009 | Southwest Operating, Inc.-Tyler | Smith | Hall #1 | 7,000 | 42332269 |
| 669476 | Oct 20, 2008 | Oct 20, 2008 | Southwest Operating, Inc.-Tyler | Nacogdoches | Melton #2 | 9,400 | 34732946 |
| 662804 | Jun 18, 2008 | Jun 18, 2008 | Southwest Operating, Inc.-Tyler | Smith | Moss Estate #1 | 12,000 | 42332159 |
| 656011 | Feb 28, 2008 | Feb 28, 2008 | Southwest Operating, Inc.-Tyler | Nacogdoches | Corr #2 | 9,600 | 34732781 |
| 653861 | Jan 25, 2008 | Jan 25, 2008 | Southwest Operating, Inc.-Tyler | Anderson | Lipsey, Samuel A. #1 | 10,513 | 00130026 |
| 648680 | Nov 6, 2007 | Nov 6, 2007 | Southwest Operating, Inc.-Tyler | Henderson | Mitchell, J. #1 | 8,800 | 21330940 |
| 627845 | Feb 14, 2007 | Feb 14, 2007 | Southwest Operating, Inc.-Tyler | Rusk | Chandler, Susan B. #1 | 6,200 | 40131974 |
| 627845Amendment | Feb 14, 2007 | Feb 14, 2007 | Southwest Operating, Inc.-Tyler | Rusk | Chandler, Susan B. #1 | 7,000 | 40131974 |
| 630240 | Dec 11, 2006 | Dec 11, 2006 | Southwest Operating, Inc.-Tyler | Nacogdoches | Prince #2 | 9,200 | 34732447 |
| 629408 | Nov 27, 2006 | Nov 27, 2006 | Southwest Operating, Inc.-Tyler | Leon | Ferguson #1 | 6,600 | 28931624 |
| 629408Amendment | Nov 27, 2006 | Nov 27, 2006 | Southwest Operating, Inc.-Tyler | Leon | Ferguson Unit #1 | 6,600 | 28931624 |
| 618568 | May 15, 2006 | May 15, 2006 | Southwest Operating, Inc.-Tyler | Nacogdoches | Christopher #2 | 9,200 | 34732284 |
| 611250 | Dec 27, 2005 | Dec 27, 2005 | Southwest Operating, Inc.-Tyler | Nacogdoches | Spivey #1 #1 | 9,000 | 34732186 |
| 608923 | Nov 3, 2005 | Nov 3, 2005 | Southwest Operating, Inc.-Tyler | Nacogdoches | Christopher #1 | 9,000 | 34732162 |
| 603685 | Jul 21, 2005 | Jul 21, 2005 | Southwest Operating, Inc.-Tyler | Nacogdoches | Newman, O.T. #1 | 9,000 | 34732096 |
| 600229 | May 12, 2005 | May 12, 2005 | Southwest Operating, Inc.-Tyler | Nacogdoches | Gray #1 #1 | 8,700 | 34732054 |
| 600229Amendment | May 12, 2005 | May 12, 2005 | Southwest Operating, Inc.-Tyler | Nacogdoches | Gray #1 #1 | 8,700 | 34732054 |
| 553826 | Nov 23, 2004 | Nov 23, 2004 | Southwest Operating, Inc.-Tyler | Nacogdoches | Garrison Gas Unit 3 #1 | 10,529 | 34730121 |
| 549639 | Aug 23, 2004 | Aug 23, 2004 | Southwest Operating, Inc.-Tyler | Nacogdoches | Melton #1 | 9,000 | 34731948 |
| 549639Amendment | Aug 23, 2004 | Aug 23, 2004 | Southwest Operating, Inc.-Tyler | Nacogdoches | Melton #1 | 9,000 | 34731948 |
| 534605 | Jul 30, 2003 | Jul 30, 2003 | Southwest Operating, Inc.-Tyler | Freestone | Minze #1 | 4,000 | 16132721 |
| 527927 | Feb 5, 2003 | Feb 5, 2003 | Southwest Operating, Inc.-Tyler | Freestone | Van Dyke Unit #1HH | 4,000 | 16132552 |
| 527927Amendment | Feb 5, 2003 | Feb 5, 2003 | Southwest Operating, Inc.-Tyler | Freestone | Van Dyke Unit #1HH | 4,000 | 16132552 |
| 456046Amendment | Dec 23, 1996 | Dec 23, 1996 | Southwest Operating, Inc.-Tyler | Smith | Denmon, Tom #A 1 | 7,700 | 42331479 |
| 46023Amendment | Apr 10, 1979 | Apr 10, 1979 | Southwest Operating, Inc.-Tyler | Rusk | Reube Gene Richardson GU #2 | 7,200 | 40130819 |