| W.D. Fowler #242-249-32615 | Harper Hefte Inc. only | Jim Wells, TXCaptain Lucey (4800 Sand) | PluggedOil | 5,800 | Feb 8, 2018 | — | — |
| Deases #142-131-39306 | Harper Hefte Inc. only | Duval, TXFitzsimmons NE. (4400 Sd.) | PluggedOil | 5,600 | Aug 3, 2012 | — | — |
| Palacios #142-131-39251 | Harper Hefte Inc. only | Duval, TXConception (Tinney) | PluggedGas | 6,900 | Sep 23, 2011 | — | — |
| Mosser Trust #142-249-32571 | Harper Hefte Inc. only | Jim Wells, TXBen Bolt W.(4900) | PluggedOil | 5,600 | Jan 25, 2011 | — | — |
| Nona Bingham #242-025-33718 | Harper Hefte Inc. only | Bee, TXFortitude W (Frio) | PluggedGas | 3,800 | May 7, 2010 | — | — |
| Countiss Heirs #142-355-33966 | Harper Hefte Inc. only | Nueces, TXAgua Dulce North (6630) | PluggedOil | 7,800 | Sep 24, 2009 | — | — |
| Tschirhart #142-163-33401 | Harper Hefte Inc. only | Frio, TXGoldfinch (Austin Chalk) | PluggedOil | 6,500 | Aug 13, 2009 | — | — |
| Jacob Holdings Ltd #242-013-34270 | Harper Hefte Inc. only | Atascosa, TXPoteet | PluggedOil | 4,000 | Jul 10, 2009 | — | — |
| Nona Bingham #142-025-33643 | Harper Hefte Inc. only | Bee, TXFortitude (1400) | PluggedGas | 4,300 | Jan 5, 2009 | — | — |
| Wallace #342-297-34730 | Harper Hefte Inc. only | Live Oak, TXMt. Lucas (4100) | PluggedGas | 4,200 | Apr 13, 2007 | — | — |
| Wallace #242-297-34612 | Harper Hefte Inc. only | Live Oak, TXMt. Lucas (V-4 Sand) | PluggedGas | 5,000 | Mar 18, 2005 | — | — |
| Wallace #1R42-297-34571 | Harper Hefte Inc. only | Live Oak, TXMt. Lucas (V-4 Sand) | PluggedGas | 5,000 | May 3, 2004 | — | — |
| East R. et al #142-409-32746 | Harper Hefte Inc. only | San Patricio, TXMathis North (2800) | PluggedGas | 4,800 | Oct 8, 2003 | — | — |
| Hefte Mary Tom Trust #1042-355-31807 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Consolidated Frio) | PluggedGas | 7,500 | Jun 18, 1999 | — | — |
| Hefte Mary Tom et al #1142-355-32848 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Consolidated Frio) | PluggedGas | 6,800 | Aug 20, 1998 | — | — |
| Baker Katherine K. #342-409-32543 | Harper Hefte Inc. only | San Patricio, TXHemlock (Sinton) | PluggedOil | 5,500 | Sep 3, 1997 | — | — |
| Painter #142-409-32520 | Harper Hefte Inc. only | San Patricio, TXHemlock (Lower Frio) | Not on scheduleOil | 6,100 | Apr 10, 1997 | — | — |
| Harlan Etal #442-355-33058 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Pfluger Lo.) | PluggedOil | 7,200 | Dec 10, 1996 | — | — |
| Hefte Mary Tom et al #1242-355-33041 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (6240) | PluggedOil | 6,750 | Jun 14, 1996 | — | — |
| Burns - Hooks #142-175-32839 | Harper Hefte Inc. only | Goliad, TXClip (3580) | PluggedGas | 4,000 | May 26, 1995 | — | — |
| Boerner Unit #142-249-32225 | Harper Hefte Inc. only | Jim Wells, TXHenshaw (5660 Sand) | PluggedOil | 5,900 | Dec 10, 1993 | — | — |
| Green Miller Unit #142-025-32684 | Harper Hefte Inc. only | Bee, TXPapalote (4680) | PluggedGas | 5,650 | Sep 24, 1993 | — | — |
| Chicago Land Bank B #142-355-32852 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Consolidated Frio) | PluggedGas | 6,750 | Oct 24, 1991 | — | — |
| Wendel Fred #142-123-00691 | Harper Hefte Inc. only | De Witt, TXDoehrmann N. (Massive 1ST) | PluggedOil | 8,517 | Sep 11, 1989 | — | — |
| McNair #242-355-32402 | Harper Hefte Inc. only | Nueces, TXKuypers (5900) | PluggedOil | 6,000 | Mar 14, 1989 | — | — |
| Harlan et al #342-355-32342 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (6500) | PluggedOil | 7,615 | Aug 8, 1988 | — | — |
| Hefte Mary T. et al #942-355-31566 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Consolidated Frio) | PluggedGas | 6,700 | Nov 18, 1987 | — | — |
| Bixby #142-355-32550 | Harper Hefte Inc. only | Nueces, TXShield West (2900) | PluggedOil | 3,400 | Nov 24, 1986 | — | — |
| Heard #142-391-31931 | Harper Hefte Inc. only | Refugio, TXRefugio West (4900) | PluggedGas | 5,600 | Oct 22, 1986 | — | — |
| Pyle #142-355-32522 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Pyle 5800) | PluggedOil | 6,500 | Jul 31, 1986 | — | — |
| McNair B #142-355-32170 | Harper Hefte Inc. only | Nueces, TXKuypers (5900) | PluggedOil | 6,200 | Nov 25, 1985 | — | — |
| Braslau #242-297-33582 | Harper Hefte Inc. only | Live Oak, TXBraslau (Wilcox 7700) | PluggedGas | 8,250 | May 13, 1985 | — | — |
| Wendel Fred #242-123-00690 | Harper Hefte Inc. only | De Witt, TXDoehrmann N. (Massive 1ST) | PluggedOil | — | — | — | — |
| Whitt H. B. #1 T42-249-03657 | Harper Hefte Inc. only | Jim Wells, TXBentonville (King 2) | PluggedOil | — | — | — | — |
| Hefte Mary Tom et al #142-355-00203 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Consolidated Frio) | PluggedGas | — | — | — | — |
| Hefte Mary Tom et al #442-355-00493 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Consolidated Frio) | ActiveGas | 4,090 | — | — | — |
| Hefte Mary Tom Trust #742-355-00498 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (6240) | PluggedOil | — | — | — | — |
| Fee #2 C42-355-05700 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Consolidated Frio) | PluggedGas | — | — | — | — |
| Hefte Mary Tom #142-355-06211 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Consolidated Frio) | PluggedGas | — | — | — | — |
| Hefte Mary Tom et al #842-355-06629 | Harper Hefte Inc. only | Nueces, TXAgua Dulce (Consolidated Frio) | PluggedGas | — | — | — | — |