| Palmore, J.B. O-8-13765 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 2 | 2.82K | 111K | Jan 1993 – Jul 2026 |
| Moore, Ben H O-8-13502 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 3 | 2.72K | 69.9K | Jan 1993 – Jul 2026 |
| Robertson, I. W. Estate O-8-29472 | Brown Industrial Gas OP, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Comanche | 1 | 1.18K | 151 | Apr 2004 – Jul 2026 |
| Rankin, Ray O-8-13496 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 2 | 558 | 42.7K | Jan 1993 – Jul 2026 |
| Bramlet "B" O-8-21291 | Formation Recovery LLC only | Bbb&c, BLK.3 (Marble Falls) | Comanche | 1 | 324 | 7.07K | Jan 1993 – Jul 2026 |
| Wright, Bess L. O-8-13504 | Bayou Operating Company, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 249 | 17.3K | Jan 1993 – May 2026 |
| Maxwell O-8-25807 | Maxwell, Rex only | Bbb&c, BLK.3 (Marble Falls) | Comanche | 2 | 29 | 0 | Jan 1993 – Jul 2026 |
| Ringhoffer, A. H. O-8-23620 | Wilson Well Service Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 4 | 28 | 2.21K | Jan 1993 – Mar 2008 |
| Williams, Willie G-8-100401 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 24.2K | Jan 1993 – Jul 2026 |
| Williams, Willie G-8-100402 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 52.5K | Jan 1993 – Jul 2026 |
| Williams, Willie G-8-100403 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 69.1K | Jan 1993 – Jul 2026 |
| Spence, Robert J. G-8-100405 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 60 | Jan 1993 – Apr 1998 |
| Spence, A. P. G-8-100406 | Pickett Oil Company only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 2.14K | Jan 1993 – Sep 2009 |
| Rankin, Ray G-8-100410 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 19.4K | Jan 1993 – Jul 2026 |
| Rankin, Ray G-8-100411 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 100K | Jan 1993 – Jul 2026 |
| Woods, Maudie G-8-100657 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Woods, H.T. G-8-102369 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 12.5K | Jan 1993 – Jul 2026 |
| Bramlet "A" G-8-102427 | Formation Recovery LLC only | Bbb&c, BLK.3 (Marble Falls) | Comanche | 1 | 0 | 23.5K | Jan 1993 – Dec 2019 |
| Bramlet "A" G-8-102428 | Formation Recovery LLC only | Bbb&c, BLK.3 (Marble Falls) | Comanche | 1 | 0 | 34.3K | Jan 1993 – Nov 2019 |
| Lee, Weldon G-8-105999 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 1 | 0 | 124K | Jan 1993 – Jul 2026 |
| Lee, Weldon G-8-106000 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 1 | 0 | 124K | Jan 1993 – Jul 2026 |
| I.w.robertson Estate G-8-108955 | White Horse Oil Company only | Bbb&c, BLK.3 (Marble Falls) | Comanche | 1 | 0 | 0 | Jan 1993 – Aug 2011 |
| Lester Unit G-8-112352 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 70.4K | Jan 1993 – Jul 2026 |
| Wright, Bess L. "A" G-8-112354 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 20.2K | Jan 1993 – Jan 2010 |
| Murphree,w.e. "A" G-8-112355 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 82.1K | Jan 1993 – Jul 2026 |
| Murphree, W.E. "A" G-8-122365 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 50.3K | Jan 1993 – Jul 2026 |
| Palmore,j.b. G-8-122366 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 1 | 0 | 140K | Jan 1993 – Jul 2026 |
| Spence G-8-123246 | Formation Recovery LLC only | Bbb&c, BLK.3 (Marble Falls) | Brown | 1 | 0 | 56.3K | Jan 1993 – Jul 2026 |
| West "A" G-8-81676 | Bryco Gas Co. only | Bbb&c, BLK.3 (Marble Falls) | Comanche | 1 | 0 | 0 | Jan 1993 – Apr 1994 |
| Spence, Robert J. G-8-125400 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 85.7K | Jan 1993 – Jul 2026 |
| Ringhoffer, A. H. G-8-146645 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 1 | 0 | 91.8K | Jul 1993 – Jul 2026 |
| Ringhoffer, A. H. G-8-146653 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 1 | 0 | 53.8K | Jul 1993 – Jul 2026 |
| Ringhoffer, A. H. G-8-146654 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 1 | 0 | 50.8K | Jul 1993 – Jul 2026 |
| Ringhoffer, A. H. G-8-146655 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 22K | Jul 1993 – Jul 2026 |
| Bramlet 'A' G-8-173817 | Formation Recovery LLC only | Bbb&c, BLK.3 (Marble Falls) | Comanche | 1 | 0 | 10.8K | Jun 1999 – Nov 2019 |
| Wright, Bess L. G-8-237123 | Bayou Operating Company, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 9.11K | Jan 2008 – Jul 2026 |
| Rankin, Ray G-8-282691 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 8.95K | Aug 2017 – Jul 2026 |
| Rankin, Ray G-8-282693 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 7.59K | Aug 2017 – Jul 2026 |
| Spence, Robert J. G-8-125399 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 16.3K | Jan 1993 – Jul 2026 |
| Robertson Heirs G-8-84819 | Sequoia Energy Resources only | Bbb&c, BLK.3 (Marble Falls) | Comanche | 1 | 0 | 9.28K | Jan 1993 – Jul 2026 |
| Barr, C.A. G-8-88494 | KLH Oil & Gas, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 1 | 0 | 0 | Jan 1993 – May 1994 |
| Newman, Thomas G-8-100394 | Wilson Well Service Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 26 | Jan 1993 – Apr 1998 |
| Newman, Thomas G-8-100396 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 38.5K | Jan 1993 – Jul 2026 |
| Murphree,w.e. "A" G-8-100397 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 59K | Jan 1993 – Jul 2026 |
| Lester Unit G-8-100398 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | — | 1 | 0 | 84.7K | Jan 1993 – Jul 2026 |
| Woods, Maudie "A" G-8-100400 | Southwest Gas Systems, Inc. only | Bbb&c, BLK.3 (Marble Falls) | Brown | 1 | 0 | 86.1K | Jan 1993 – Jul 2026 |