| 510332Amendment | Jun 15, 2001 | Jun 15, 2001 | Allegro Investments, Inc. | Jackson | Gateway #1 | 7,000 | 23933142 |
| 510331 | Jun 15, 2001 | Jun 15, 2001 | Allegro Investments, Inc. | Jackson | Johnson Foundation #3 | 6,000 | 23933143 |
| 510330 | Jun 15, 2001 | Jun 15, 2001 | Allegro Investments, Inc. | Jackson | Connor #1 | 6,000 | 23933141 |
| 510329 | Jun 15, 2001 | Jun 15, 2001 | Allegro Investments, Inc. | Jackson | Cihal #2 | 6,000 | 23933140 |
| 509880 | Jun 6, 2001 | Jun 6, 2001 | Allegro Investments, Inc. | Jackson | Layden-Yendrey Gas Unit #2 | 12,600 | 23933137 |
| 509450 | May 25, 2001 | May 25, 2001 | Allegro Investments, Inc. | Jackson | Lakeside #1 | 7,000 | 23933133 |
| 508998 | May 15, 2001 | May 15, 2001 | Allegro Investments, Inc. | Jackson | Coates #1 | 11,000 | 23933129 |
| 507584 | Apr 10, 2001 | Apr 10, 2001 | Allegro Investments, Inc. | Jackson | Fonville-Janssen #1 | 6,300 | 23933125 |
| 507212 | Mar 30, 2001 | Mar 30, 2001 | Allegro Investments, Inc. | Calhoun | Cole #1 | 9,200 | 05731614 |
| 505280 | Feb 14, 2001 | Feb 14, 2001 | Allegro Investments, Inc. | Jackson | L. Ranch #1 | 9,400 | 23933114 |
| 505279 | Feb 14, 2001 | Feb 14, 2001 | Allegro Investments, Inc. | Jackson | Dugger-Traylor #1 | 9,600 | 23933113 |
| 505278 | Feb 14, 2001 | Feb 14, 2001 | Allegro Investments, Inc. | Goliad | Cathy #1 | 2,500 | 17533322 |
| 505278Amendment | Feb 14, 2001 | Feb 14, 2001 | Allegro Investments, Inc. | Goliad | Cathy #1 | 2,500 | 17533322 |
| 505277 | Feb 14, 2001 | Feb 14, 2001 | Allegro Investments, Inc. | Jackson | Cihal #1 | 5,500 | 23933112 |
| 505276 | Feb 14, 2001 | Feb 14, 2001 | Allegro Investments, Inc. | Jackson | Marthiljohni #1 | 9,000 | 23933116 |
| 505276Amendment | Feb 14, 2001 | Feb 14, 2001 | Allegro Investments, Inc. | Jackson | Marthiljohni #1 | 9,000 | 23933116 |
| 505275 | Feb 14, 2001 | Feb 14, 2001 | Allegro Investments, Inc. | Jackson | McColloch Trust #1 | 9,200 | 23933115 |
| 504654 | Jan 29, 2001 | Jan 29, 2001 | Allegro Investments, Inc. | Jackson | Traylor #2 | 10,000 | 23933111 |
| 503510 | Dec 28, 2000 | Dec 28, 2000 | Allegro Investments, Inc. | Jackson | Kuhlman #1 | 9,600 | 23933108 |
| 502677 | Dec 6, 2000 | Dec 6, 2000 | Allegro Investments, Inc. | Jackson | Layden #1 | 10,830 | 23932946 |
| 502423 | Nov 29, 2000 | Nov 29, 2000 | Allegro Investments, Inc. | Jackson | Johnson Fondation #2 | 5,500 | 23933104 |
| 502423Amendment | Nov 29, 2000 | Nov 29, 2000 | Allegro Investments, Inc. | Jackson | Johnson Fondation #2 | 5,500 | 23933104 |
| 500653 | Oct 11, 2000 | Oct 11, 2000 | Allegro Investments, Inc. | Jackson | Wilbeck #2 | 5,500 | 23933097 |
| 500196 | Sep 29, 2000 | Sep 29, 2000 | Allegro Investments, Inc. | Jackson | Sample #2 | 5,800 | 23933093 |
| 500195 | Sep 29, 2000 | Sep 29, 2000 | Allegro Investments, Inc. | Jackson | Hensley-Johnny #1 | 9,900 | 23933094 |
| 499788 | Sep 19, 2000 | Sep 19, 2000 | Allegro Investments, Inc. | Jackson | Young Sisters #1 | 10,800 | 23933092 |
| 499788Amendment | Sep 19, 2000 | Sep 19, 2000 | Allegro Investments, Inc. | Jackson | Young Sisters #1 | 10,800 | 23933092 |
| 499785 | Sep 19, 2000 | Sep 19, 2000 | Allegro Investments, Inc. | Jackson | Schaefer-Buckner-HSL #4 | 3,400 | 23932898 |
| 498756 | Aug 23, 2000 | Aug 23, 2000 | Allegro Investments, Inc. | Victoria | McCan, C. K. Ranch #9S | 1,850 | 46933279 |
| 498756Amendment | Aug 23, 2000 | Aug 23, 2000 | Allegro Investments, Inc. | Victoria | McCan, C. K. Ranch #9S | 1,860 | 46933279 |
| 497630 | Jul 25, 2000 | Jul 25, 2000 | Allegro Investments, Inc. | Jackson | Weaver-Dugger Unit #1A | 9,500 | 23933081 |
| 497580 | Jul 25, 2000 | Jul 25, 2000 | Allegro Investments, Inc. | Atascosa | McDonald #1 | 1,900 | 01334132 |
| 497448 | Jul 21, 2000 | Jul 21, 2000 | Allegro Investments, Inc. | Jackson | Redfish Lake #1 | 6,800 | 23933080 |
| 496417 | Jun 26, 2000 | Jun 26, 2000 | Allegro Investments, Inc. | Jackson | Weaver-Dugger Unit #1 | 9,500 | 23933073 |
| 495426 | May 24, 2000 | May 24, 2000 | Allegro Investments, Inc. | Jackson | Daniel Estate Unit HSL #2 | 3,890 | 23932883 |
| 495426Amendment | May 24, 2000 | May 24, 2000 | Allegro Investments, Inc. | Jackson | Daniel Estate - HSL #2 | 3,890 | 23932883 |
| 495426Amendment | May 24, 2000 | May 24, 2000 | Allegro Investments, Inc. | Jackson | Daniel Estate - HSL #2 | 3,890 | 23932883 |
| 495424 | May 24, 2000 | May 24, 2000 | Allegro Investments, Inc. | Jackson | 4 Way Ranch #1 | 9,500 | 23933069 |
| 495131 | May 17, 2000 | May 17, 2000 | Allegro Investments, Inc. | Jackson | Sappington Farms #1 | 6,900 | 23933067 |
| 494236 | Apr 19, 2000 | Apr 19, 2000 | Allegro Investments, Inc. | Jackson | Born Heirs #1 | 6,500 | 23933066 |
| 493802 | Apr 6, 2000 | Apr 6, 2000 | Allegro Investments, Inc. | Jackson | Frenzel Heirs #1 | 6,500 | 23933064 |
| 493472 | Mar 27, 2000 | Mar 27, 2000 | Allegro Investments, Inc. | Jackson | Lay #1 | 6,400 | 23933061 |
| 491708 | Feb 3, 2000 | Feb 3, 2000 | Allegro Investments, Inc. | Jackson | Yendrey Fee #2 | 12,300 | 23933003 |
| 491524 | Jan 28, 2000 | Jan 28, 2000 | Allegro Investments, Inc. | Jackson | Sample Heirs #1 | 6,000 | 23933057 |
| 491226 | Jan 20, 2000 | Jan 20, 2000 | Allegro Investments, Inc. | Jackson | Jarratt #1 | 6,000 | 23933056 |
| 491226Amendment | Jan 20, 2000 | Jan 20, 2000 | Allegro Investments, Inc. | Jackson | Jarratt #1 | 6,000 | 23933056 |
| 491113 | Jan 18, 2000 | Jan 18, 2000 | Allegro Investments, Inc. | Jackson | David #1 | 6,500 | 23933054 |
| 490803 | Jan 3, 2000 | Jan 3, 2000 | Allegro Investments, Inc. | Jackson | Beamon Unit #1 | 7,000 | 23933053 |
| 490318 | Dec 13, 1999 | Dec 13, 1999 | Allegro Investments, Inc. | Atascosa | Krueger #1 | 1,950 | 01334126 |
| 490275 | Dec 13, 1999 | Dec 13, 1999 | Allegro Investments, Inc. | Jackson | Pruitt #1 | 6,700 | 23933052 |
| 489047 | Nov 2, 1999 | Nov 2, 1999 | Allegro Investments, Inc. | Jackson | Meador Heirs Unit #1 | 6,800 | 23933049 |
| 488835 | Oct 26, 1999 | Oct 26, 1999 | Allegro Investments, Inc. | Jackson | Traylor #1 | 12,500 | 23933046 |
| 488834 | Oct 26, 1999 | Oct 26, 1999 | Allegro Investments, Inc. | Jackson | Johnson Foundation #1 | 6,000 | 23933047 |
| 488834Amendment | Oct 26, 1999 | Oct 26, 1999 | Allegro Investments, Inc. | Jackson | Johnson Foundation #1 | 6,000 | 23933047 |
| 488065 | Sep 30, 1999 | Sep 30, 1999 | Allegro Investments, Inc. | Colorado | Adkins #1 | 7,650 | 08932174 |
| 487776 | Sep 21, 1999 | Sep 21, 1999 | Allegro Investments, Inc. | Jackson | Raybon-Pressly Unit #1 | 5,500 | 23933039 |
| 487005 | Aug 27, 1999 | Aug 27, 1999 | Allegro Investments, Inc. | Victoria | McCan, C. K. #3 | 3,250 | 46932327 |
| 486932 | Aug 25, 1999 | Aug 25, 1999 | Allegro Investments, Inc. | Jackson | Mark Unit #1 | 5,600 | 23933035 |
| 486932Amendment | Aug 25, 1999 | Aug 25, 1999 | Allegro Investments, Inc. | Jackson | Mark Unit #1 | 5,600 | 23933035 |
| 486818 | Aug 20, 1999 | Aug 20, 1999 | Allegro Investments, Inc. | Jackson | Foust #1 | 7,600 | 23933033 |
| 486725 | Aug 17, 1999 | Aug 17, 1999 | Allegro Investments, Inc. | Jackson | Layden-Yendrey Gas Unit #1 | 12,426 | 23932998 |
| 484131 | Apr 26, 1999 | Apr 26, 1999 | Allegro Investments, Inc. | Victoria | McCan, C. K. "M" #11S | 4,400 | 46933405 |
| 482046 | Jan 15, 1999 | Jan 15, 1999 | Allegro Investments, Inc. | Jackson | Pressly #1 | 8,400 | 23933021 |
| 481960 | Jan 11, 1999 | Jan 11, 1999 | Allegro Investments, Inc. | Jackson | Wilbeck #1 | 6,000 | 23933020 |
| 478216 | Jul 24, 1998 | Jul 24, 1998 | Allegro Investments, Inc. | Jackson | Robinson Ranch - Rob #21 | 4,610 | 23932878 |
| 478215 | Jul 24, 1998 | Jul 24, 1998 | Allegro Investments, Inc. | Jackson | Robinson Ranch - Rob #23 | 4,260 | 23932881 |
| 478214 | Jul 24, 1998 | Jul 24, 1998 | Allegro Investments, Inc. | Jackson | Borchers Ranch - Bor #1 | 4,310 | 23932933 |
| 476486 | May 21, 1998 | May 21, 1998 | Allegro Investments, Inc. | Jackson | Yendrey Fee #2 | 12,800 | 23933003 |
| 475499 | Apr 21, 1998 | Apr 21, 1998 | Allegro Investments, Inc. | Jackson | Layden-Yendrey Gas Unit #1 | 12,800 | 23932998 |
| 474693 | Mar 25, 1998 | Mar 25, 1998 | Allegro Investments, Inc. | Wharton | Brothers Cattle Co. Unit No. 1 #1 | 4,910 | 48133758 |
| 474692 | Mar 25, 1998 | Mar 25, 1998 | Allegro Investments, Inc. | Jackson | Daniel Estate - HSL #2 | 4,414 | 23932883 |
| 473016 | Feb 6, 1998 | Feb 6, 1998 | Allegro Investments, Inc. | Lavaca | Vaughn #1 | 6,500 | 28532578 |
| 473016Amendment | Feb 6, 1998 | Feb 6, 1998 | Allegro Investments, Inc. | Lavaca | Vaughn #1 | 6,500 | 28532578 |
| 472433 | Jan 21, 1998 | Jan 21, 1998 | Allegro Investments, Inc. | Victoria | Musselman Ranches, Inc. #1442 | 9,900 | 46933318 |
| 470080 | Nov 14, 1997 | Nov 14, 1997 | Allegro Investments, Inc. | Jackson | Musselman Ranch - Mus #10 | 6,300 | 23932978 |
| 469211 | Oct 24, 1997 | Oct 24, 1997 | Allegro Investments, Inc. | Jackson | Webernick G.U. #1 | 16,000 | 23932300 |
| 469209 | Oct 24, 1997 | Oct 24, 1997 | Allegro Investments, Inc. | Victoria | McCan, C. K. #6 | 2,261 | 46932378 |
| 468928 | Oct 17, 1997 | Oct 17, 1997 | Allegro Investments, Inc. | Victoria | McCan, C. K. Ranch #10S | 2,500 | 46933280 |
| 468927 | Oct 17, 1997 | Oct 17, 1997 | Allegro Investments, Inc. | Victoria | McCan, C. K. Ranch #9S | 2,500 | 46933279 |
| 467962 | Sep 24, 1997 | Sep 24, 1997 | Allegro Investments, Inc. | Lavaca | Borchers Ranch - Bor "D" #7 | 4,500 | 28532537 |
| 467961 | Sep 24, 1997 | Sep 24, 1997 | Allegro Investments, Inc. | Jackson | Borchers Ranch - Bor "E" #12 | 4,000 | 23932967 |
| 466352 | Aug 15, 1997 | Aug 15, 1997 | Allegro Investments, Inc. | Victoria | McCan, C. K. #1 | 4,300 | 46932273 |
| 464248 | Jun 26, 1997 | Jun 26, 1997 | Allegro Investments, Inc. | Victoria | McCan, C. K. #3 | 4,315 | 46932327 |
| 463137 | Jun 2, 1997 | Jun 2, 1997 | Allegro Investments, Inc. | Wood | Richey-Lund-Berke #1 | 6,300 | 49931884 |
| 462814 | May 23, 1997 | May 23, 1997 | Allegro Investments, Inc. | Jackson | Layden #1 | 11,500 | 23932946 |
| 462814Amendment | May 23, 1997 | May 23, 1997 | Allegro Investments, Inc. | Jackson | Layden #1 | 11,500 | 23932946 |
| 461213 | Apr 16, 1997 | Apr 16, 1997 | Allegro Investments, Inc. | Goliad | Edwards Unit #1 | 9,000 | 17532753 |
| 460130 | Mar 20, 1997 | Mar 20, 1997 | Allegro Investments, Inc. | Goliad | J. C. Thompson Gas Unit #1 | 3,500 | 17532971 |
| 460130Amendment | Mar 20, 1997 | Mar 20, 1997 | Allegro Investments, Inc. | Goliad | J. C. Thompson Gas Unit #1 | 3,500 | 17532971 |
| 459564 | Mar 11, 1997 | Mar 11, 1997 | Allegro Investments, Inc. | Lavaca | Borchers Ranch - Bor "B" #11 | 15,000 | 28532463 |
| 458316 | Feb 7, 1997 | Feb 7, 1997 | Allegro Investments, Inc. | Jackson | Fenner, Katherine #3 | 6,850 | 23932936 |
| 456987 | Jan 6, 1997 | Jan 6, 1997 | Allegro Investments, Inc. | Jackson | Borchers Ranch - Bor "A" #2 | 4,800 | 23932934 |
| 456986 | Jan 6, 1997 | Jan 6, 1997 | Allegro Investments, Inc. | Jackson | Borchers Ranch - Bor #1 | 4,800 | 23932933 |
| 452982 | Nov 1, 1996 | Nov 1, 1996 | Allegro Investments, Inc. | Jim Hogg | Ramirez, Maria M. #1 | 5,000 | 24732070 |
| 452206 | Oct 2, 1996 | Oct 2, 1996 | Allegro Investments, Inc. | Victoria | Keeran #1 | 7,300 | 46933187 |
| 450398 | Jul 16, 1996 | Jul 16, 1996 | Allegro Investments, Inc. | Victoria | McCan, C. K. #11 | 2,800 | 46933172 |
| 450398Amendment | Jul 16, 1996 | Jul 16, 1996 | Allegro Investments, Inc. | Victoria | McCan, C. K. #11 | 2,800 | 46933172 |
| 448729 | May 31, 1996 | May 31, 1996 | Allegro Investments, Inc. | Victoria | McCan, C. K. #8 | 2,800 | 46933160 |
| 448729Amendment | May 31, 1996 | May 31, 1996 | Allegro Investments, Inc. | Victoria | McCan, C. K. #8 | 2,800 | 46933160 |
| 448276 | May 20, 1996 | May 20, 1996 | Allegro Investments, Inc. | Victoria | McCan, C. K. #4B | 2,500 | 46933155 |