| State Tract 216 O-2-6058 | Torrent Oil LLC | Grass Island (Farwell -A-) | 4 | 664K | 241K | by Jan 1993 – Apr 2026 |
| State Tract 216 O-2-6506 | Torrent Oil LLC | Grass Island (Matagorda -A-) | 8 | 632K | 494K | by Jan 1993 – Apr 2026 |
| State Tract 216 O-2-5707 | Torrent Oil LLC | Grass Island (Farwell -M-) | 4 | 572K | 413K | by Jan 1993 – Apr 2026 |
| BP Chemicals O-2-8709 | Royal Production Company, Inc. | Guajolote Suerte (5750) | 2 | 465K | 395K | Mar 2002 – Apr 2026 |
| P.W.L.R. O-2-8703 | Royal Production Company, Inc. | Guajolote Suerte (5750) | 4 | 460K | 909K | Mar 2002 – Apr 2026 |
| Welder B O-2-6081 | B&L Resources, L.L.C. | Katie Welder (L-1) | 8 | 444K | 552K | by Jan 1993 – Mar 2016 |
| Dunwoody, Charles O-2-691 | McGowan Working Partners, Inc. | Heyser | 4 | 416K | 228K | by Jan 1993 – Apr 2026 |
| State Tract 216 O-2-6568 | Torrent Oil LLC | Grass Island (4220) | 4 | 399K | 377K | by Jan 1993 – Sep 2025 |
| State Tract 99 O-2-4219 | TR Offshore, LLC | Mosquito Point (Frio I) | 3 | 341K | 563K | Sep 1994 – May 2025 |
| State of Texas #33724 O-2-1271 | Bep Operating, LLC | Powderhorn (5200 Sand) | 6 | 293K | 214K | by Jan 1993 – Nov 2015 |
| Traylor, Maude B. O-2-3004 | Silverbrook Operating, LLC | Maude B. Traylor, E. (Melbourne) | 4 | 276K | 423K | Feb 1997 – Apr 2026 |
| Brooking, M.T. O-2-7458 | Corum Production Company | Southern Comfort (Frio 9100) | 1 | 268K | 980K | by Jan 1993 – Oct 1999 |
| Welder O-2-11598 | B&L Resources, L.L.C. | Heyser (5400 #3) | 4 | 213K | 2.51M | Jul 2018 – Mar 2026 |
| State Tract 216 O-2-7049 | Torrent Oil LLC | Grass Island (4870) | 2 | 189K | 150K | by Jan 1993 – Apr 2026 |
| Hahn O-2-8795 | Kebo Oil & Gas, Inc. | Long Mott, East (7450) | 3 | 175K | 423K | Jan 2003 – Apr 2026 |
| Cook, J.G. O-2-7499 | Baylor Operating, LLC | Heyser | 2 | 132K | 138K | by Jan 1993 – Oct 2019 |
| State of Texas 33724 O-2-8241 | XOG Operating LLC | Powderhorn (4 North) | 1 | 112K | 148K | Jan 1997 – Aug 2005 |
| Welder, Patrick H. O-2-6463 | Finaly Resources LLC | Barge Canal (Frio 5940) | 1 | 109K | 414K | by Jan 1993 – Feb 2026 |
| Bennett, W. H. O-2-703 | McGowan Working Partners, Inc. | Heyser | 3 | 102K | 318K | by Jan 1993 – Apr 2026 |
| Brooking, M. T. O-2-8608 | Silverbrook Operating II LLC | Southern Comfort (Frio 9100) | 1 | 101K | 66.7K | Jun 2000 – Feb 2017 |
| Welder, E.H. Mrs. O-2-8266 | B&L Resources, L.L.C. | Heyser (5400) | 1 | 96.6K | 58.5K | Aug 1996 – Jan 2005 |
| Dow Powderhorn Ranch-Edc O-2-6426 | Pitco Investments, Ltd. | Powderhorn,s.w.(frio 10700) | 1 | 91.9K | 297K | Apr 1993 – Feb 2006 |
| Sheriff Greta O-2-3337 | Initial Energy Services, LLC | Sheriff (5700 Greta Sand) | 5 | 91.2K | 181K | by Jan 1993 – Jan 2015 |
| Cook, J. G. O-2-3186 | Baylor Operating, LLC | Heyser (5400 #3) | 2 | 90.1K | 70.6K | Mar 1993 – Oct 2019 |
| State Tract #59 O-2-3900 | Gulf E&P Ltd | Zoller, S. (Frio G-3) | 1 | 88.8K | 126K | by Jan 1993 – May 2016 |
| Dunwoody, Charles O-2-8146 | McGowan Working Partners, Inc. | Heyser (5400 #3) | 1 | 87.3K | 258K | Mar 1996 – Aug 2024 |
| Bennett O-2-7921 | McGowan Working Partners | Heyser (7030) | 1 | 86.3K | 107K | Nov 1993 – Mar 1998 |
| Bennett, W. H. O-2-7419 | McGowan Working Partners, Inc. | Heyser (5400 #3) | 1 | 78.1K | 86.3K | May 2004 – Apr 2026 |
| State of Texas 33724 O-2-6607 | Apache Corporation | Powderhorn (4 North) | 2 | 71.5K | 56.1K | by Jan 1993 – Oct 1994 |
| Welder M O-2-12460 | B&L Resources, L.L.C. | Heyser (5400 #2) | 1 | 65.8K | 129K | Mar 2022 – Mar 2026 |
| Gallinipper Unit O-2-9120 | Neumin Production Company | Lavaca Bay (F-37) | 1 | 65.5K | 1.02M | May 2006 – Jun 2007 |
| Powderhorn Company O-2-8668 | Bep Operating, LLC | Powderhorn (4 Sand) | 1 | 62.1K | 139K | Aug 2001 – Nov 2015 |
| Welder "A" O-2-8333 | B&L Resources, L.L.C. | Heyser (G-7) | 1 | 61.6K | 70.6K | Dec 1997 – Mar 2016 |
| Welder 'C' O-2-12242 | B&L Resources, L.L.C. | Heyser (5400 #3) | 1 | 61K | 668K | Mar 2021 – Mar 2026 |
| Welder, Patrick H. O-2-6445 | Carter E&P, LLC | Barge Canal (Frio 5490) | 2 | 60.7K | 133K | by Jan 1993 – Oct 2011 |
| Cook, J. G. O-2-7893 | Baylor Operating, LLC | Heyser (F-47) | 1 | 60.6K | 44.4K | Jul 1993 – Oct 2019 |
| Boyd, C. H. O-2-3332 | Formation Resources LLC | Sheriff (5700 Greta Sand) | 2 | 60.3K | 115K | by Jan 1993 – Nov 2005 |
| Traylor, Maude B O-2-5061 | Silverbrook Operating, LLC | Maude B. Traylor (8300 Sand) | 2 | 59.9K | 177K | May 1997 – Dec 2020 |
| State of Texas 33724 O-2-7884 | Bep Operating, LLC | Powderhorn (3-B) | 2 | 58.8K | 51.2K | Jun 1993 – Aug 2018 |
| Welder D O-2-6420 | Baylor Operating, LLC | Katie Welder (F-4) | 6 | 55.2K | 34.5K | by Jan 1993 – Jan 2021 |
| Levingston, A. O-2-3336 | Formation Resources LLC | Sheriff (5700 Greta Sand) | 1 | 53.4K | 149K | by Jan 1993 – Jul 2010 |
| Hahn O-2-9069 | C & E Operating, Inc. | Long Mott,north (8200) | 1 | 51K | 55.7K | Feb 2006 – Jan 2013 |
| Welder "B" O-2-8575 | Frostwood Energy, LLC | Katie Welder (L-7) | 2 | 50.6K | 40.4K | Mar 2000 – Apr 2016 |
| Gallinipper Unit O-2-9164 | Neumin Production Company | Lavaca Bay (F-43) | 2 | 47.2K | 1.32M | Jun 2006 – Jun 2008 |
| Welder, P.H. "B13" O-2-7845 | B&L Resources, L.L.C. | Heyser, SE. (6250) | 1 | 44.6K | 84.6K | by Jan 1993 – Aug 2000 |
| Boyd, Frank O-2-3333 | Texas Petroleum Investment Co. | Sheriff (5700 Greta Sand) | 2 | 44.5K | 92.2K | by Jan 1993 – Jan 2001 |
| Traylor O-2-7365 | Angel Operating LLC | Maude B. Traylor, North (18) | 1 | 44K | 280K | by Jan 1993 – Feb 2016 |
| Bennett, W.H. O-2-7941 | McGowan Working Partners, Inc. | Heyser (5700) | 2 | 41K | 74.9K | Jan 1994 – Jul 2000 |
| State Tract 99 O-2-11130 | TR Offshore, LLC | Mosquito Point (Frio F) | 1 | 40.2K | 115K | Mar 2015 – May 2025 |
| State Tract 216 O-2-8740 | Torrent Oil LLC | Grass Island (Farwell Q) | 2 | 32.1K | 44.8K | Feb 2002 – Feb 2012 |