| Muenzler #1HHZ42-177-30881 | First Rock Inc. | Gonzales, TXMag (Austin Chalk) | PluggedOil | 7,120 | Dec 28, 2021 | — | — |
| Schauer Monroe Unit #1HZ42-177-31568 | First Rock Inc. | Gonzales, TXMag (Austin Chalk) | PluggedOil | 7,500 | Mar 9, 2020 | — | — |
| Thoms #1HZ42-493-32183 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 9,000 | Oct 4, 2018 | — | — |
| Jarzombek Unit #1HHZ42-493-30760 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 7,580 | Apr 22, 2015 | — | — |
| Reyes #142-131-30004 | First Rock Inc. | Duval, TXRosita | PluggedOil | 4,258 | Oct 31, 2013 | — | — |
| Tom Crews #4SW42-131-35855 | First Rock Inc. | Duval, TXReyes (2500) | PluggedGas | 2,869 | Jul 19, 2010 | — | — |
| Frank Jimmy #1BHHZ42-493-32230 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 9,500 | Jun 25, 2010 | — | — |
| Kasper #3BHHZ42-493-32156 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 9,000 | Jun 18, 2010 | — | — |
| Turnham J.C. #1HHZ42-163-30894 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | PluggedOil | 7,000 | Aug 18, 2005 | — | — |
| Rollins Ranch #1A42-297-34434 | First Rock Inc. | Live Oak, TXDix Hollow (Hockley 4550) | PluggedOil | 6,200 | Apr 24, 2003 | — | — |
| Thoms #4HZ42-493-32331 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 9,000 | Dec 11, 2002 | — | — |
| Thoms #342-493-32189 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 8,000 | Nov 8, 2002 | — | — |
| Rollins Ranch #2A42-297-34443 | First Rock Inc. | Live Oak, TXDix Hollow (Hockley 4550) | PluggedGas | 4,800 | Jun 26, 2001 | — | — |
| Mueller Unit #142-255-00172 | First Rock Inc. | Karnes, TXFalls City (Austin Chalk) | PluggedOil | 11,100 | Aug 10, 2000 | — | — |
| Labus Prosper #1BHHZ42-493-32362 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 9,000 | Jan 19, 1999 | — | — |
| Casares A.K. #1BHHZ42-493-31981 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 7,000 | Dec 17, 1998 | — | — |
| Steen Unit #142-177-00588 | First Rock Inc. | Gonzales, TXCheapside NW. (Austin Chalk) | PluggedOil | 12,018 | Jul 24, 1998 | — | — |
| Thoms #5BHHZ42-493-32363 | First Rock Inc. | Wilson, TXMcClain (Buda) | PluggedOil | 9,000 | Jul 13, 1998 | — | — |
| El Cid B #7HZ42-127-32995 | First Rock Inc. | Dimmit, TXPearsall (Austin Chalk) | PluggedOil | 9,000 | May 1, 1998 | — | — |
| Red Crest Trust #1HZ42-123-31793 | First Rock Inc. | De Witt, TXRoehl (Edwards) | PluggedGas | 16,000 | Dec 30, 1997 | — | — |
| Schiffers Moberley #2HHZ42-493-31111 | First Rock Inc. | Wilson, TXSutil (Austin) | PluggedOil | 9,000 | Aug 7, 1997 | — | — |
| Bohach #1HHZ42-493-32334 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 9,000 | Jul 31, 1997 | — | — |
| Wiatrek #1HHZ42-493-32239 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 9,000 | Jul 29, 1997 | — | — |
| Schiffers Ranch #2HZ42-493-32196 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 7,600 | Jun 13, 1997 | — | — |
| Eschenburg R.L. II #6HHZ42-493-32204 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 9,000 | May 2, 1997 | — | — |
| Schiffers Ranch #4HZ42-493-32233 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 7,350 | Apr 16, 1997 | — | — |
| Fee #142-493-32073 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 8,200 | Mar 4, 1997 | — | — |
| Fee #242-493-32151 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 8,000 | Mar 4, 1997 | — | — |
| Fee #342-493-32212 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | ActiveOil | 7,612 | Mar 4, 1997 | — | — |
| Schearrer #142-013-33843 | First Rock Inc. | Atascosa, TXMarcelina Creek (Buda) | PluggedOil | 7,800 | Dec 27, 1993 | — | — |
| Hierholzer a #142-493-32385 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 6,500 | Aug 6, 1993 | — | — |
| Thoms #242-493-32190 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 7,800 | Jun 4, 1992 | — | — |
| Gruss-Chandler #1HHZ42-493-31479 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 7,700 | Dec 30, 1991 | — | — |
| Turnham #342-163-31870 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | PluggedOil | 7,500 | Nov 20, 1991 | — | — |
| West Shiner Ranch #2HZ42-163-32860 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | PluggedOil | 8,700 | May 20, 1991 | — | — |
| Fee #4HZ42-493-32288 | First Rock Inc. | Wilson, TXMarcelina Creek (Austin Chalk) | PluggedOil | 10,000 | Apr 18, 1991 | — | — |
| Biela #1HHZ42-493-31617 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 10,000 | Mar 19, 1991 | — | — |
| Thompson a #2HZ42-163-32998 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | PluggedOil | 6,250 | Feb 6, 1991 | — | — |
| Turnham #2AHZ42-163-32986 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | PluggedOil | 10,000 | Jan 24, 1991 | — | — |
| Dilley Unit B #1HZ42-163-32935 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | PluggedOil | 9,500 | Dec 6, 1990 | — | — |
| Turnham #1HZ42-163-32823 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | PluggedOil | 8,600 | Aug 24, 1990 | — | — |
| Dilley Unit -a- #1HZ42-163-32642 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | Shut inOil | 6,902 | Feb 6, 1990 | — | — |
| Schiffers Ranch -a- #a 242-493-32078 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 7,500 | Jun 10, 1988 | — | — |
| Nehemiah #142-493-32070 | First Rock Inc. | Wilson, TXMarcelina Creek (Buda) | PluggedOil | 7,400 | May 12, 1988 | — | — |
| Uno Mas -B- #172442-283-31171 | First Rock Inc. | La Salle, TXStrickhausen (Olmos Tri-Bar) | PluggedOil | 8,600 | Sep 12, 1985 | — | — |
| Teltschik Wilfred #142-493-31272 | First Rock Inc. | Wilson, TXFloresville S. (Austin Chalk) | PluggedOil | 6,423 | May 13, 1983 | — | — |
| Boening Bros. Dairy #142-493-30191 | First Rock Inc. | Wilson, TXSutil (Reef) | PluggedOil | 6,500 | Jul 30, 1982 | — | — |
| Darter David #15342-507-31599 | First Rock Inc. | Zavala, TXDel Monte | PluggedOil | 4,144 | Dec 1, 1981 | — | — |
| Samuels L. P. #542-163-31534 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | PluggedOil | 7,700 | Oct 24, 1977 | — | — |
| Turnham J.C. #242-163-30985 | First Rock Inc. | Frio, TXPearsall (Austin Chalk) | PluggedOil | 7,500 | Oct 7, 1977 | — | — |