| Welder, Minnie S. O-4-12594 | Allegiant Resources, LLC only | Portilla (Frio) | San Patricio | 110 | 2.66M | 5.72M | Sep 1996 – Jul 2026 |
| Davis, Nona Berry O-2-1738 | Welderxp Ltd. only | Yougeen | Bee | 43 | 889K | 2.97M | Jan 1993 – Jul 2026 |
| Welder, E. H., -C- O-4-2126 | McGowan Working Partners, Inc. only | Plymouth | San Patricio | 51 | 763K | 1.16M | Jan 1993 – Jul 2026 |
| Welder, Minnie S. O-4-2178 | Abraxas Petroleum Corporation only | Portilla (7400 Sand) | San Patricio | 43 | 686K | 1.65M | Jan 1993 – Nov 1996 |
| Welder, J.F. Unit O-4-12145 | 84 Energy LLC only | Odem (Massive Frio) | San Patricio | 30 | 616K | 7.33M | Jan 1993 – Jul 2026 |
| Welder B O-2-6081 | B&L Resources, L.L.C. only | Katie Welder (L-1) | Calhoun | 8 | 444K | 552K | Jan 1993 – Jul 2026 |
| Welder, W. D. O-3-5344 | Odum Oil & Gas Co. only | Liberty, South | Liberty | 12 | 326K | 381K | Jan 1993 – Jul 2026 |
| Welder, Minnie S. O-4-8083 | Allegiant Resources, LLC only | Portilla (5700 Sand) | San Patricio | 9 | 299K | 261K | Jan 1993 – Jul 2026 |
| Priest & Beavers Queen Unit O-10-24297 | Blackwelder Oil only | Priest & Beavers, East (Queen) | Pecos | 25 | 237K | 22 | Jan 1993 – Jul 2026 |
| Hamilton, Diane Welder O-2-6598 | Bridwell Oil Co. only | Papalote, E. (3250 -B-) | Bee | 7 | 222K | 21 | Jan 1993 – Jul 2026 |
| Welder, E. H., -C- O-4-6772 | McGowan Working Partners, Inc. only | Plymouth (5470) | — | 2 | 217K | 396K | Jan 1993 – Jul 2026 |
| Welder O-2-11598 | B&L Resources, L.L.C. only | Heyser (5400 #3) | Calhoun | 4 | 213K | 2.51M | Jul 2018 – Jul 2026 |
| Spielhagen, Inez O-2-2297 | Welderxp Ltd. only | Burnell (Massive) | — | 1 | 213K | 112K | Jan 1993 – Jul 2026 |
| Welder "A" O-4-12512 | Dallas Petroleum Group, LLC only | Sinton, North (5020 Maduro) | San Patricio | 2 | 168K | 89.5K | Nov 1995 – Jul 2026 |
| Welder, R. H. O-4-2146 | Smith Production Inc. only | Plymouth (Greta Stringer) | San Patricio | 16 | 155K | 323K | Jan 1993 – Jul 2007 |
| Welder "C" O-2-8852 | Hilcorp Energy Company only | Phil Power (5000) | Refugio | 1 | 147K | 218K | May 2002 – Feb 2016 |
| Welder, J.F. Unit O-4-12144 | 84 Energy LLC only | Odem, S. (Massive Frio) | San Patricio | 5 | 142K | 678K | Feb 1993 – Jul 2026 |
| Welder, Minnie S. O-4-2177 | Abraxas Petroleum Corporation only | Portilla (7300 Sand) | San Patricio | 14 | 139K | 467K | Jan 1993 – Dec 1996 |
| Welder Heirs CJ O-2-11431 | Charro Operating, L.L.C. only | Gaffney, SW. (5400) | Goliad | 5 | 135K | 212K | Nov 2017 – Jul 2026 |
| Welder, R. H. -a- a/C 1 O-4-7311 | Dallas Petroleum Group, LLC only | Sinton, North (4600) | San Patricio | 2 | 130K | 131K | Jan 1993 – Jul 2026 |
| Welder, R.H. -B- O-4-11591 | Dallas Petroleum Group, LLC only | North Pasture (7300 Sand) | San Patricio | 1 | 123K | 273K | Jan 1993 – Jul 2026 |
| Welder Ford O-4-13771 | Dallas Petroleum Group, LLC only | Taft, West (5600) | Refugio | 5 | 121K | 31.4K | Feb 2013 – Jul 2026 |
| Welder J O-4-12802 | Dallas Petroleum Group, LLC only | Sinton, North (5600) | San Patricio | 1 | 117K | 103K | Sep 1998 – Jul 2026 |
| Welder Hrs. "A" O-4-2840 | McGowan Working Partners, Inc. only | Seven Sisters | Duval | 3 | 113K | 6.91K | Jan 1993 – Apr 2026 |
| Welder, T. F., Heirs O-4-7410 | Fesco, Ltd. only | Loma Novia, E. (1ST Sand) | — | 5 | 112K | 25 | Jan 1993 – Jul 2026 |
| Welder, Patrick H. O-2-6463 | Finaly Resources LLC only | Barge Canal (Frio 5940) | Calhoun | 1 | 109K | 414K | Jan 1993 – Jul 2026 |
| Overby, C. J. O-2-2287 | Welderxp Ltd. only | Burnell (Luling) | — | 7 | 108K | 143K | Jan 1993 – Jul 2026 |
| Welder, E.H. Mrs. O-2-8266 | B&L Resources, L.L.C. only | Heyser (5400) | Calhoun | 1 | 96.6K | 58.5K | Aug 1996 – Jul 2026 |
| Huebner-Conklin O-3-25260 | Welderxp Ltd. only | Lucky, South (8700) | Matagorda | 1 | 95.9K | 13.1K | Sep 2008 – Jul 2026 |
| Welder, J. F., Hrs. -B- O-4-2852 | United Operating, LLC only | Seven Sisters | — | 9 | 95.2K | 98 | Jan 1993 – Jul 2026 |
| Welder, Minnie S., Estate O-2-2508 | Beaver Oil & Gas Operating, LLC only | Lonnie Glasscock (Greta Str.) | Victoria | 2 | 93.2K | 57.6K | Jan 1993 – Jul 2026 |
| Welder, Minnie S. O-4-2176 | Abraxas Petroleum Corporation only | Portilla (7100 Sand) | San Patricio | 10 | 92.1K | 156K | Jan 1993 – Nov 1996 |
| Lyons, Annie Lee O-2-2286 | Welderxp Ltd. only | Burnell (Luling) | Karnes | 16 | 90.6K | 127K | Jan 1993 – Jul 2026 |
| Welder, Minnie S., Estate O-2-2396 | Beaver Oil & Gas Operating, LLC only | Lonnie Glasscock (3500) | Victoria | 2 | 79.6K | 46K | Jan 1993 – Jul 2026 |
| Welder, J.F. Heirs O-4-12778 | Proline Energy Resources Inc only | Angelita New (Frio) | San Patricio | 2 | 79.4K | 907K | Mar 1998 – Jul 2026 |
| Welder, R. H. O-4-8746 | Smith Production Inc. only | Plymouth (4400) | San Patricio | 1 | 72.6K | 112K | Jan 1993 – Jun 2005 |
| Welder, J. F., Hrs. -320- O-4-2857 | United Operating, LLC only | Seven Sisters | — | 14 | 72.2K | 99 | Jan 1993 – Jul 2026 |
| Welder, R.H. "B" O-4-13735 | Dallas Petroleum Group, LLC only | Sinton, North (4700 Sand) | San Patricio | 1 | 69K | 40.5K | Mar 2012 – Jul 2026 |
| Welder Hrs. O-4-2839 | McGowan Working Partners, Inc. only | Seven Sisters | Duval | 6 | 67K | 18 | Jan 1993 – Aug 2025 |
| Welder, Minnie S. O-4-11271 | Abraxas Petroleum Corporation only | Portilla (8000 Sand) | San Patricio | 2 | 65.9K | 141K | Jan 1993 – Dec 1996 |
| Perez-Duerkson Unit O-4-10778 | Welderxp Ltd. only | Laughlin-Kibbe (5300) | Jim Wells | 1 | 65.9K | 71 | Jan 1993 – Jul 2026 |
| Welder M O-2-12460 | B&L Resources, L.L.C. only | Heyser (5400 #2) | Calhoun | 1 | 65.8K | 129K | Mar 2022 – Jul 2026 |
| Welder, E.H. -C- O-4-12523 | McGowan Working Partners, Inc. only | Plymouth (6000 -B- Sand) | San Patricio | 1 | 63.2K | 129K | Jan 1996 – Jul 2026 |
| Grahmann, Leroy J. O-2-7453 | B D Production Co., Inc. only | Welder Ranch (1960) | Victoria | 1 | 62.3K | 16.3K | Jan 1993 – Jun 2015 |
| Welder "A" O-2-8333 | B&L Resources, L.L.C. only | Heyser (G-7) | Calhoun | 1 | 61.6K | 70.6K | Dec 1997 – Nov 2023 |
| Welder, E. H. "C" O-4-13223 | McGowan Working Partners, Inc. only | Plymouth (5390) | San Patricio | 1 | 61.2K | 87.5K | Apr 2004 – Jul 2026 |
| Welder 'C' O-2-12242 | B&L Resources, L.L.C. only | Heyser (5400 #3) | Calhoun | 1 | 61K | 668K | Mar 2021 – Jul 2026 |
| Welder, Patrick H. O-2-6445 | Carter E&P, LLC only | Barge Canal (Frio 5490) | Calhoun | 2 | 60.7K | 133K | Jan 1993 – Feb 2013 |
| Welder, J. F., Unit O-4-1996 | 84 Energy LLC only | Odem | San Patricio | 14 | 60.4K | 705K | Jan 1993 – Jul 2026 |
| Sargent O-2-11128 | Welderxp Ltd. only | Mt. Lucas (Vicksburg) | Live Oak | 1 | 59.8K | 5.66K | Aug 2015 – Jul 2026 |