| Hewitt, Ella O-11-60742 | Texland Petroleum, L.P. only | Whitharral (Clear Fork, Lo.) | Hockley | 7 | 661K | 38.3K | Jan 1993 – Apr 2026 |
| Guaranty Title & Trust Co. Unit O-4-9778 | Fox, Hewitt B., Inc. only | Saxet, Deep (6200) | Nueces | 1 | 46.9K | 20 | Jan 1993 – Apr 2026 |
| Hewitt -A- O-10-4431 | Johnson Operating Company, LLC. only | Moore | Howard | 7 | 42.3K | 12 | Jan 1993 – Feb 2024 |
| Hewitt -C- O-10-8501 | Johnson Operating Company, LLC. only | Moore | Howard | 4 | 38.5K | 7 | Jan 1993 – Apr 2023 |
| Hewitt -B- O-10-4432 | Johnson Operating Company, LLC. only | Moore | Howard | 4 | 35.6K | 12 | Jan 1993 – Dec 2020 |
| Hunt, John W. Jr. G-4-147233 | O'Connor & Hewitt, Ltd. only | Midway, East ( 9450) | San Patricio | 1 | 10K | 477K | Dec 1993 – Mar 1998 |
| Yeager, Agnes J. O-4-11661 | Fox, Hewitt B., Inc. only | Clara Driscoll, SE. (Frio 5700) | Nueces | 1 | 7.23K | 19 | Jan 1993 – May 1998 |
| Hewitt O-2-8975 | Hollimon Oil Corporation only | Telferner, North (2500) | Victoria | 1 | 5.45K | 46.8K | Jun 2005 – Sep 2009 |
| Yeager, Agnes J. O-4-9506 | Fox, Hewitt B., Inc. only | Clara Driscoll, SE (5700, LO) | Nueces | 1 | 3.91K | 21 | Jan 1993 – Jan 1999 |
| Hunt, John W. Jr. G-4-157753 | O'Connor & Hewitt, Ltd. only | Midway,east (9100) | San Patricio | 1 | 3.17K | 98K | Mar 1996 – Nov 1996 |
| Taylor, J. B. et Al G-4-154102 | Fox, Hewitt B., Inc. only | Mercedes ( 1-F-1) | Hidalgo | 1 | 2.28K | 484K | Mar 1995 – Mar 2005 |
| Hunt, John W. Jr G-4-124260 | Hewitt, Robert J. only | Midway, East ( Commonwealth) | San Patricio | 1 | 1.21K | 17.2K | Jan 1993 – Nov 1993 |
| Harithas, Ann W. G-2-147391 | Hewitt, Robert J. only | Sarco Creek (4170) | Goliad | 1 | 373 | 1.24M | Oct 1993 – Jul 1998 |
| Hunt, John W. Jr. G-4-147403 | O'Connor & Hewitt, Ltd. only | Midway, E. (McKamey) | San Patricio | 1 | 358 | 18.7K | Jan 1994 – Dec 1995 |
| Hoelscher-Tex Mex Unit O-4-7837 | Fox, Hewitt B., Inc. only | Saxet, Deep | Nueces | 1 | 171 | 10 | Jan 1993 – Jul 1994 |
| Hunt, John Jr. G-4-85826 | Hewitt, Robert J. only | Midway, East (10200) | San Patricio | 1 | 118 | 2.74K | Jan 1993 – Nov 1993 |
| Leftwich, Marion W. O-11-66269 | Hewitt, Alan P. only | Smyer | Hockley | 1 | 101 | 8 | Jan 1993 – Feb 1993 |
| Harithas, Ann W. G-2-153060 | Hewitt, Robert J. only | Sarco Creek (2800) | Goliad | 1 | 79 | 1.5M | Feb 1995 – Dec 1998 |
| Hunt,john W.jr. G-4-73741 | O'Connor & Hewitt, Ltd. only | Midway,east (9100) | San Patricio | 1 | 77 | 1.56K | Jan 1993 – Jul 1995 |
| O'Connor-Hewitt G-2-214276 | Alta Mesa Services, LP only | Garcitas Creek, N. (Frio 3780) | Victoria | 1 | 46 | 174K | Jun 2005 – Mar 2007 |
| O'Connor-Hewitt G-2-231114 | Gaither Petroleum Corporation only | Crain (3300) | Victoria | 1 | 37 | 71.2K | Sep 2007 – Jul 2009 |
| Harithas, Ann W. G-2-155281 | Hewitt, Robert J. only | Sarco Creek (2800) | Goliad | 1 | 21 | 1.31M | Aug 1995 – May 2000 |
| Hewitt G-2-250555 | Field Petroleum Corp. only | Telferner (2000) | Victoria | 1 | 14 | 6.33K | Nov 2008 – May 2009 |
| Hewitt G-2-255196 | Field Petroleum Corp. only | Telferner, North (2500) | Victoria | 1 | 6 | 26.9K | Oct 2009 – Aug 2012 |
| Hewitt "B" G-2-203660 | Field Petroleum Corp. only | Telferner, East (4400) | Victoria | 1 | 6 | 516K | Aug 2004 – Sep 2010 |
| Harithas, Ann W. G-2-148743 | Hewitt, Robert J. only | Sarco Creek (2800) | Goliad | 1 | 5 | 261K | Mar 1994 – Jun 1996 |
| Hewitt G-2-185350 | Hollimon Oil Corporation only | Telferner (4600) | Victoria | 1 | 3 | 39K | Aug 2001 – Nov 2002 |
| Harithas, Ann W. G-2-147392 | Hewitt, Robert J. only | Sarco Creek (2800) | Goliad | 1 | 3 | 499K | Oct 1993 – Nov 1998 |
| Harithas, Ann W. G-2-156609 | Hewitt, Robert J. only | Sarco Creek (2800) | Goliad | 1 | 3 | 157K | Nov 1995 – Nov 1996 |
| Hewitt G-2-177236 | Hollimon Oil Corporation only | Telferner (2200) | Victoria | 1 | 3 | 922K | May 2000 – Sep 2004 |
| Hewitt G-2-189737 | Hollimon Oil Corporation only | Telferner (2750) | Victoria | 1 | 3 | 13.1K | Apr 2002 – Aug 2002 |
| Hewitt G-2-184801 | Hollimon Oil Corporation only | Telferner (4600) | Victoria | 1 | 2 | 139K | Aug 2001 – Nov 2002 |
| Hewitt G-2-184437 | Hollimon Oil Corporation only | Marcado Creek (2000) | Victoria | 1 | 1 | 39.7K | Jun 2001 – Mar 2002 |
| Hewitt, D. T. O-11-60821 | Ricks Expl Acquisition Corp only | Whitharral (Clear Fork, Lo.) | Hockley | 1 | 1 | 0 | Oct 1996 – Oct 1996 |
| Hewitt G-2-184440 | Hollimon Oil Corporation only | Telferner (2200) | Victoria | 1 | 1 | 15.1K | Jun 2001 – Sep 2001 |
| Barrera-Leach G-4-72201 | Fox, Hewitt B., Inc. only | Sejita, East (1220) | Duval | 1 | 0 | 0 | — |
| Yturria Land & Livestock Co. G-4-65389 | Fox, Hewitt B., Inc. only | Hardwicke (Sullivan, Upper) | Starr | 1 | 0 | 33.8K | Jan 1993 – Jun 1995 |
| O'Connor & Hewitt G-2-227789 | Brayton Operating Corp. only | Telferner, North (3700) | Victoria | 1 | 0 | 27.5K | Apr 2007 – Aug 2007 |
| Hewitt "B" G-2-207890 | Hollimon Oil Corporation only | Telferner, NW. (Frio 3800) | Victoria | 1 | 0 | 68K | Oct 2004 – Dec 2005 |
| O'Connor-Hewitt "A" G-2-207814 | Brayton Operating Corp. only | Telferner, North (3600 Frio) | Victoria | 1 | 0 | 18K | Sep 2004 – Jan 2005 |
| Swenson, E. J., Trust O-4-7164 | Fox, Hewitt B., Inc. only | Concordia, NW. (Theodore 4850) | Nueces | 2 | 0 | 0 | — |
| Hewitt "A" G-2-203207 | Field Petroleum Corp. only | Telferner (2200) | Victoria | 1 | 0 | 51.8K | Apr 2004 – Jan 2006 |
| Hewitt G-2-194689 | Field Petroleum Corp. only | Telferner (2200) | Victoria | 1 | 0 | 142K | Jan 2003 – Feb 2007 |
| Hewitt G-2-186603 | Hollimon Oil Corporation only | Telferner (2900) | Victoria | 1 | 0 | 146K | Aug 2001 – May 2003 |
| Hewitt G-2-186601 | Hollimon Oil Corporation only | Telferner, North (2500) | Victoria | 1 | 0 | 83.5K | Aug 2001 – May 2005 |
| Harithas, Ann W. G-2-173801 | Hewitt, Robert J. only | Sarco Creek (3700) | Goliad | 1 | 0 | 87.1K | May 1999 – May 2000 |
| Barrera-Leach G-4-80707 | Fox, Hewitt B., Inc. only | Sejita, East (1900) | Duval | 1 | 0 | 0 | — |
| Harithas, Ann W. G-2-150361 | Hewitt, Robert J. only | Sarco Creek (4170) | Goliad | 1 | 0 | 60.7K | Jun 1994 – Jan 1995 |
| Barrera-Leach G-4-80580 | Fox, Hewitt B., Inc. only | Sejita East (1230) | Duval | 1 | 0 | 106K | Jan 1993 – Oct 1995 |
| Laughlin-Hewitt G-4-93700 | Duval Gas Gathering Corporation only | Premont (Singer 3100) | Jim Wells | 1 | 0 | 0 | — |