| Whitten, J. H. O-13-27597 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 7 | 214K | 2.53M | Jan 1993 – Jul 2026 |
| H. D. Read et AL O-13-32843 | Upham Oil & Gas Company only | Tidwell (Strawn 4600) | Wise | 1 | 76.2K | 94.1K | Oct 2013 – Jul 2026 |
| Castleberry, J. O. O-13-17376 | Upham Oil & Gas Company only | Boonsville (Consolidated Congl.) | — | 1 | 70.4K | 268K | Jan 1993 – Jul 2026 |
| Chet Unit O-13-32458 | Upham Oil & Gas Company only | Newark, East (Barnett Shale) | Jack | 1 | 41.7K | 28.9K | Jul 2012 – Jul 2026 |
| Zuber O-13-30493 | Upham Oil & Gas Company only | Newark, East (Barnett Shale) | Jack | 1 | 33.6K | 85.3K | Sep 2005 – Jul 2026 |
| McCurdy, T. S., Estate O-13-13822 | Upham Oil & Gas Company only | Tidwell (Strawn 4600) | — | 3 | 29.3K | 116K | Jan 1993 – Jul 2026 |
| Dewbre, Walter O-13-17377 | Upham Oil & Gas Company only | Boonsville (Consolidated Congl.) | Wise | 4 | 27.3K | 430K | Jan 1993 – Jul 2026 |
| Davis, N. H. O-13-12349 | Upham Oil & Gas Company only | Tidwell (Strawn 4600) | — | 3 | 25.2K | 31.3K | Jan 1993 – Jul 2026 |
| Zuber Unit O-13-31300 | Upham Oil & Gas Company only | Newark, East (Barnett Shale) | Jack | 1 | 21K | 22.3K | May 2009 – Jul 2026 |
| Orr, Wm. Unit O-13-17357 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 5 | 19.1K | 590K | Jan 1993 – Jul 2026 |
| Stringer West Unit O-8-29626 | Upham Oil & Gas Company only | Whittenburg (Strawn, Lower) | Palo Pinto | 1 | 16.3K | 9.72K | Aug 2005 – Jul 2026 |
| Bell, B. W. O-13-17763 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 2 | 16.3K | 140K | Jan 1993 – Jul 2026 |
| Chastain O-8-22742 | Upham Oil & Gas Company only | Polkstalk (Bend Congl.) | Palo Pinto | 1 | 16.1K | 254K | Jan 1993 – Jul 2026 |
| McCurdy, T.S. Est. O-13-27293 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | — | 1 | 14.4K | 88.8K | Jan 1993 – Jul 2026 |
| Barksdale Estate O-13-28035 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 1 | 11.4K | 550K | Jan 1993 – Jul 2026 |
| Stuart Heirs O-8-24413 | Upham, Chester R., Jr. only | Strawn, NW. (Marble Falls) | Palo Pinto | 2 | 11.1K | 53.5K | Jan 1993 – Feb 1996 |
| Orr, Wm., -a- Unit O-13-12800 | Upham Oil & Gas Company only | Morris (Strawn) | — | 1 | 9.7K | 201K | Jan 1993 – Jul 2026 |
| Stephen, Paul "A" O-8-24133 | Upham, Chester R., Jr. only | Strawn, NW. (Marble Falls) | Palo Pinto | 2 | 9.51K | 9.43K | Jan 1993 – Feb 1996 |
| Turner "A" O-13-28890 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 1 | 8.89K | 444K | Dec 1994 – Jul 2026 |
| Bridges, R. "B" O-13-28535 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 1 | 8.54K | 779K | Mar 1993 – Dec 2006 |
| Barksdale, Amos O-13-27995 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 1 | 8.41K | 976K | Jan 1993 – Jun 2026 |
| Van Hoose Unit O-13-27307 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | — | 1 | 8.26K | 209K | Jan 1993 – Jul 2026 |
| Big Brushy O-8-28217 | Upham Oil & Gas Company only | Strawn, NW. (Marble Falls) | Palo Pinto | 1 | 8.24K | 128K | May 1997 – Jul 2026 |
| Kaker O-13-29488 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 1 | 7.24K | 216K | Apr 1998 – Jul 2026 |
| Bridges, R. "A" O-13-26317 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | — | 1 | 6.97K | 255K | Jan 1993 – Dec 2006 |
| Tipton, Ralph Unit O-13-27308 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | — | 1 | 6.53K | 61.7K | Jan 1993 – Jul 2026 |
| Jordan O-13-20560 | Upham Oil & Gas Company only | Caughlin (Strawn 4015) | Wise | 1 | 6.49K | 508K | Jan 1993 – Jul 2026 |
| Orr, Wm., Unit O-13-12790 | Upham Oil & Gas Company only | Morris (Strawn 4300) | — | 1 | 6.22K | 90.1K | Jan 1993 – Jul 2026 |
| Coffee, Roy O-13-28860 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 1 | 6.22K | 932K | Sep 1994 – Nov 2006 |
| Long, C.B. "C" O-8-24361 | Upham, Chester R., Jr. only | C.B. Long, (Marble Falls) | Palo Pinto | 1 | 6.17K | 151K | Jan 1993 – Apr 2000 |
| Dewbre, W. -A- O-13-17378 | Upham Oil & Gas Company only | Boonsville (Consolidated Congl.) | — | 2 | 5.31K | 108K | Jan 1993 – Jul 2026 |
| Wharton, Herman O-8-22744 | Upham Oil & Gas Company only | Polkstalk (Bend Congl.) | Palo Pinto | 1 | 5.3K | 254K | Jan 1993 – Jul 2026 |
| Baptist Foundation O-13-25941 | Upham Oil & Gas Company only | Barfield (Conglomerate) | Jack | 1 | 5.11K | 129K | Jan 1993 – Jul 2026 |
| Elizabeth O-8-29092 | Upham Oil & Gas Company only | Strawn, NW. (Marble Falls) | Palo Pinto | 1 | 5.07K | 110K | Jan 2002 – Mar 2012 |
| Shilling, Harold O-13-24043 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 1 | 4.82K | 21.2K | Jan 1993 – Jul 2026 |
| Orr, William, Unit O-13-11906 | Upham Oil & Gas Company only | Morris (Strawn 4500) | — | 1 | 4.81K | 123K | Jan 1993 – Jul 2026 |
| Paltex O-13-32397 | Upham Oil & Gas Company only | KRS (Marble Falls) | Palo Pinto | 2 | 4.2K | 57.2K | Nov 2012 – Jul 2026 |
| Calabria-Dobbs Valley O-8-25793 | Upham Oil & Gas Company only | Polkstalk (Bend Congl.) | Palo Pinto | 1 | 3.88K | 379K | Jan 1993 – Jul 2026 |
| Green, Tom J. Unit O-13-15803 | Upham Oil & Gas Company only | Newport, S. (Bend Congl. 5800) | — | 1 | 3.82K | 244K | Jan 1993 – Jul 2026 |
| Caudill Heirs O-8-24078 | Upham Oil & Gas Company only | P.K. Lake (Congl.) | Palo Pinto | 1 | 3.75K | 19.9K | Jan 1993 – Mar 2008 |
| Jennings, M. N. O-13-27294 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | — | 2 | 3.73K | 49.3K | Jan 1993 – Jul 2026 |
| Ranch House O-8-28530 | Upham Oil & Gas Company only | Brazos, East (Caddo, Upper) | Parker | 1 | 3.69K | 76.1K | Sep 1998 – Jul 2026 |
| Slagle, A. V., Estate O-13-15738 | Upham Oil & Gas Company only | Newport, S. (Bend Congl. 5800) | — | 1 | 3.62K | 98.8K | Jan 1993 – Jul 2026 |
| Reddell, E. T. "A" O-13-27136 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 1 | 3.51K | 551K | Jan 1993 – Nov 2006 |
| Joe Johnson O-13-30141 | Upham Oil & Gas Company only | Morris (Strawn) | Wise | 1 | 3.4K | 200K | Feb 2003 – Jul 2026 |
| Hinkson #9 O-8-26296 | Upham, Chester R., Jr. only | Strawn, N. (Duffer) | Palo Pinto | 1 | 2.82K | 20.2K | Jan 1993 – Apr 2000 |
| Kelley, Earl O-13-27476 | Upham Oil & Gas Company only | Morris (Consolidated Congl.) | Wise | 1 | 2.67K | 533K | Jan 1993 – Dec 2006 |
| Stephen, Paul "B" O-8-25490 | Upham, Chester R., Jr. only | Strawn, NW. (Marble Falls) | Palo Pinto | 1 | 2.42K | 118K | Jan 1993 – Jan 1996 |
| Boley, L. E. O-13-29525 | Upham Oil & Gas Company only | Perrin, East (Strawn Upper) | — | 1 | 2.23K | 48.5K | May 1998 – Nov 2017 |
| Lucille O-8-28632 | Upham Oil & Gas Company only | Polkstalk (Bend Congl.) | Palo Pinto | 1 | 2.18K | 61.2K | Jun 1999 – Jul 2026 |