| Beaumont Petroleum Co. - State O-3-1771 | Gaither Petroleum Corporation only | Goose Creek | Harris | 22 | 1.47M | 59.1K | by Jan 1993 – Aug 2026 |
| State of Texas Deep Unit O-3-24007 | Etoco, L.P. only | Sralla Road (Yegua) | Harris | 1 | 1.22M | 3.02M | Apr 2001 – Aug 2026 |
| Stateland Oil Company O-3-1777 | Gaither Petroleum Corporation only | Goose Creek | Harris | 11 | 944K | 35.4K | by Jan 1993 – Aug 2026 |
| Hirsch State O-3-1775 | Gaither Petroleum Corporation only | Goose Creek | Harris | 5 | 154K | 9.87K | by Jan 1993 – Mar 2016 |
| State Lease 108750 G-3-255232 | Ballard Exploration Company,inc. only | Victor Blanco, W. (8800) | Harris | 1 | 140K | 5.02M | May 2009 – Oct 2024 |
| Hamill Estate G-3-140785 | Daylight Petroleum LLC only | Milton, N. (13000) | Harris | 1 | 130K | 10.7M | by Jan 1993 – Aug 2026 |
| Bracewell Estate G-3-168884 | Wagner Oil Company only | Taylor Lake, East (Lox B) | Harris | 1 | 109K | 17M | Mar 1998 – Feb 2019 |
| State Tract #1 G-3-161271 | Seagull Energy E&P Inc. only | Nassau Bay (Tex 2-II) | Harris | 1 | 109K | 7.34M | May 1996 – Aug 2000 |
| Citizens State Bank Unit O-3-16609 | Osborn,w.b. Oil & Gas Operations only | Houston, N. (Goodykoontz - 2ND) | Harris | 1 | 108K | 82.1K | by Jan 1993 – May 2015 |
| State Lease 108878 G-3-262026 | Ballard Exploration Company,inc. only | Canadian Hunter (Yegua 10,630) | Harris | 1 | 99.8K | 5.42M | Jan 2011 – Aug 2026 |
| Graves Estate(wilcox)gas Unit #1 G-3-154137 | EOG Resources, Inc. only | Milton, N. (13000) | Harris | 1 | 73.1K | 2.12M | Oct 1994 – Aug 2003 |
| Deussen Estate G-3-258272 | Ballard Exploration Company,inc. only | Deusson Estate (Cook Mntn 2) | Harris | 1 | 70.7K | 3.7M | Apr 2010 – Aug 2026 |
| Sweeney, J. J. Estate G-3-150468 | Diamond S Energy Company only | Langham Creek (Wilcox E-1) | Harris | 1 | 63K | 3.6M | Jun 1994 – Aug 1997 |
| Sweeney, J. J. Estate G-3-149298 | Diamond S Energy Company only | Langham Creek (Wilcox E-1) | Harris | 1 | 62.8K | 4.1M | Apr 1994 – Feb 2013 |
| Hamill Estate G-3-155954 | Daylight Petroleum LLC only | Milton, N. (13000) | Harris | 1 | 62.1K | 5.51M | Aug 1994 – Aug 2026 |
| McCord G-3-251330 | Ballard Exploration Company,inc. only | Deusson Estate (Cook Mntn 2) | Harris | 1 | 60.5K | 2.66M | Jul 2009 – Aug 2017 |
| State Tract #1 G-3-180385 | Legend Natural Gas II, LP only | Nassau Bay (Anomalina) | Harris | 1 | 58.7K | 5.74M | Oct 2000 – Apr 2007 |
| Bracewell Estates G-3-121374 | Legend Natural Gas II, LP only | Taylor Lake, East (Lox B) | Harris | 1 | 53.7K | 4.22M | by Jan 1993 – Jun 2000 |
| Graves Estate(wilcox)gas Unit #1 G-3-153354 | Cathexis Oil & Gas, LLC only | Milton, N. (9800 Wilcox) | Harris | 1 | 46.9K | 6.95M | Dec 1994 – Feb 2011 |
| Graves Estate(wilcox)gas Unit #1 G-3-151617 | Petrotx Operating, LLC only | Milton, N. (9800 Wilcox) | Harris | 1 | 41.2K | 8M | Oct 1994 – Aug 2026 |
| Texas State #32060 O-3-1783 | Gaither Petroleum Corporation only | Goose Creek | Harris | 2 | 41.1K | 2.07K | by Jan 1993 – Dec 2016 |
| Deussen Estate G-3-265007 | Ballard Exploration Company,inc. only | Deusson Estate (Cook Mntn 2) | Harris | 1 | 35.1K | 1.36M | Jan 2011 – Oct 2020 |
| State of Texas Shallow Unit O-3-23982 | Etoco, L.P. only | Sralla Road (Jackson, W.) | Harris | 1 | 32.7K | 709K | Apr 2001 – Feb 2003 |
| State of Texas O-3-6083 | MJ Oil, Inc. only | Tomball | Harris | 2 | 30.8K | 53.8K | by Jan 1993 – Oct 2001 |
| Zapp Estate et al -D- O-3-13607 | Houston Pipe Line Company only | Bammel (6200 Cockfield) | Harris | 4 | 28.8K | 8 | by Jan 1993 – Jan 1998 |
| State of Texas G-3-213525 | New Century Exploration, Inc. only | Sword (Yegua -A-) | Harris | 1 | 21.1K | 1.72M | Oct 2005 – Dec 2011 |
| Sweeney, J. J. Estate G-3-163855 | Diamond S Energy Company only | Cypress, Deep (Wilcox) | Harris | 1 | 16.5K | 1.8M | May 1997 – Oct 2014 |
| Sweeney, J. J. Estate G-3-161877 | Diamond S Energy Company only | Langham Creek (Upper Wilcox) | Harris | 1 | 12.4K | 1.53M | Feb 1997 – Feb 2015 |
| Graves Estate (Wilcox)gas Unit 1 G-3-152691 | Cathexis Oil & Gas, LLC only | Milton, N. (9800 Wilcox) | Harris | 1 | 11.5K | 2.34M | Dec 1994 – Oct 2004 |
| Dwyer Estate O-3-1323 | Oklatex Energy, Inc. only | Dyersdale | Harris | 1 | 7.52K | 27 | by Jan 1993 – Apr 2008 |
| Sweeney Estate G-3-41995 | Texaco E & P Inc. only | Langham Creek (Wilcox 12,700) | Harris | 1 | 6.24K | 296K | by Jan 1993 – Feb 1994 |
| Sweeney, J. J. Estate G-3-165123 | Diamond S Energy Company only | Cypress, Deep (Wilcox) | Harris | 1 | 4.95K | 466K | Sep 1997 – Feb 2015 |
| Deussen Estate A G-3-263044 | Ballard Exploration Company,inc. only | Deusson Estate (Cook Mntn 2) | Harris | 1 | 3.78K | 214K | Aug 2010 – Oct 2019 |
| Harms, H. E., Estate Unit G-3-45643 | Mosbacher Energy Company only | Milton, W. (10500) | Harris | 1 | 3.63K | 357K | by Jan 1993 – Sep 1996 |
| Clear Lake State G-3-74728 | Exxon Corp. only | Clear Lake | Harris | 1 | 2.3K | 328K | by Jan 1993 – Jun 1995 |
| Benignus, Carl E. O-3-4745 | Hamill, Claud B. Estate Of only | Rotherwood (Cockfield -a- Sd.) | Harris | 1 | 62 | 56 | by Jan 1993 – Mar 1993 |
| State Lease 110735 Unit G-3-266644 | Ballard Exploration Company,inc. only | Mykawa (Cons.) | Harris | 1 | 7 | 107K | Sep 2013 – Feb 2014 |
| State Tr. 361 O-3-5159 | United Texas Corp. (A) only | Goose Creek | Harris | 5 | 0 | 0 | — |
| RJS Unit G-3-67978 | Mengden, W. Estate Of only | Dyersdale, N. (CM-3) | Harris | 1 | 0 | 0 | — |
| Dooley, Francis Estate O-3-11668 | AA Delta Exploration, Inc. only | Pierce Junction | Harris | 1 | 0 | 0 | — |
| Oak Knoll Estates Unit O-3-12383 | Geo Engineering, Inc. only | Dyersdale, N. (Y-5) | Harris | 1 | 0 | 0 | — |
| RJS Unit G-3-67977 | Mengden, W. Estate Of only | Dyersdale, N. (CM-2) | Harris | 1 | 0 | 0 | — |
| Moody, L.B. Estate O-3-14457 | Barrington, Sam M. only | Rankin (Yegua 4) | Harris | 1 | 0 | 0 | — |
| Graves Estates, et al "A" G-3-54589 | Houston Pipe Line Company LP only | Bammel (6200 Cockfield) | Harris | 1 | 0 | 0 | — |
| Zapp Estate, et al -D- G-3-150548 | Houston Pipe Line Company LP only | Bammel (6200 Cockfield) | Harris | 1 | 0 | 0 | — |
| State Lease 103382 G-3-248061 | Ballard Exploration Company,inc. only | Wildcat | Harris | 1 | 0 | 0 | — |
| Zapp Estate et al -D- G-3-166854 | Houston Pipe Line Company LP only | Bammel (6200 Cockfield) | Harris | 1 | 0 | 0 | — |
| Ehrhardt, John, Estate G-3-5061 | Natural Gas Mktg. & Storage Co. only | Bammel (D-Y) | Harris | 1 | 0 | 0 | — |
| Bracewell Estate G-3-260039 | Legend Natural Gas II, LP only | Taylor Lake, East (Lox B) | Harris | 1 | 0 | 0 | — |
| Bracewell Estate G-3-260138 | Legend Natural Gas II, LP only | Taylor Lake, East (Lox B) | Harris | 1 | 0 | 0 | — |