| 1901 | CLINGINGSMITH | Caldwell County, TX | Oil & Gas Property | Dec 2025 |
| 1902 | CLINT | Gray County, TX | Oil & Gas Property | Jun 2026 |
| 1903 | CLINTA | Borden County, TX | Oil & Gas Property | May 2026 |
| 1904 | CLINTON | Callahan County, TX | Oil & Gas Property | Jun 2026 |
| 1905 | CLINTON | Young County, TX | Oil & Gas Property | Jun 2026 |
| 1906 | CLNS UNIT | Young County, TX | Oil & Gas Property | Jun 2022 |
| 1907 | CLOAK STATE 56-3-9-8 | Reeves County, TX | Oil & Gas Property | Jun 2026 |
| 1908 | CLOKE | Smith County, TX | Oil & Gas Property | Jun 2026 |
| 1909 | CLONA | Martin County, TX | Oil & Gas Property | Jun 2026 |
| 1910 | CLOPTON | Gaines County, TX | Oil Property | Jun 2026 |
| 1911 | CLORETTE DEPASTO 3-11 UNIT | Reeves County, TX | Oil & Gas Property | May 2026 |
| 1912 | CLOSE CITY 14 | Garza County, TX | Oil & Gas Property | Jun 2026 |
| 1913 | CLOSE JONNIE | Hutchinson County, TX | Oil & Gas Property | Jun 2026 |
| 1914 | CLOSS LAND & CATTLE | Brazos County, TX | Oil & Gas Property | May 2026 |
| 1915 | CLOSS WEST | Brazos County, TX | Oil & Gas Property | May 2026 |
| 1916 | CLOSS-RULAND UNIT | Robertson County, TX | Oil & Gas Property | May 2026 |
| 1917 | CLOUD | Shackelford County, TX | Oil & Gas Property | Dec 2013 |
| 1918 | CLOUD | Jones County, TX | Oil Property | Jun 2026 |
| 1919 | CLOUD (STRAWN SAND) UNIT | Haskell County, TX | Oil & Gas Property | May 2026 |
| 1920 | CLOUDCROFT | Glasscock County, TX | Oil & Gas Property | Jun 2026 |
| 1921 | CLOUGH ADELE | Wise County, TX | Oil & Gas Property | Jun 2026 |
| 1922 | CLOUGH MICHAEL | Wise County, TX | Oil & Gas Property | Jun 2026 |
| 1923 | CLOUS GAS UNIT | Nacogdoches County, TX | Gas Property | Jun 2026 |
| 1924 | CLOUSER M. H | Cochran County, TX | Oil & Gas Property | Jun 2026 |
| 1925 | CLOVER LEAF | Fort Bend County, TX | Oil & Gas Property | Jun 2026 |
| 1926 | CLOVERDALE 9796-F | Ward County, TX | Oil & Gas Property | Jun 2026 |
| 1927 | CLOWE | Throckmorton County, TX | Oil & Gas Property | Jun 2026 |
| 1928 | CLOWER | Rusk County, TX | Oil & Gas Property | Jun 2026 |
| 1929 | CLOWER | Harrison County, TX | Oil & Gas Property | Jun 2026 |
| 1930 | CLOWER UNIT | Montague County, TX | Oil & Gas Property | Jun 2026 |
| 1931 | CLSCM LTD | La Salle County, TX | Oil & Gas Property | Apr 2026 |
| 1932 | CLUBB WEST | Hardin County, TX | Oil & Gas Property | Jun 2026 |
| 1933 | CLUCK | Hansford County, TX | Gas Property | May 2026 |
| 1934 | CLUCK | Dawson County, TX | Oil & Gas Property | Jun 2026 |
| 1935 | CLUCK | Sherman County, TX | Oil & Gas Property | Jun 2026 |
| 1936 | CLUCK -D | Sherman County, TX | Oil & Gas Property | May 2026 |
| 1937 | CLUTE GAS UNIT | Leon County, TX | Oil & Gas Property | Jun 2026 |
| 1938 | CLUTE, M. G. GAS U | Leon County, TX | Oil & Gas Property | May 2026 |
| 1939 | CLUTE-DIEHL G | Leon County, TX | Oil & Gas Property | Jun 2026 |
| 1940 | CLUTTERED MIND 583 | Yoakum County, TX | Oil & Gas Property | Jun 2026 |
| 1941 | CLYBURN UNIT | Atascosa County, TX | Oil & Gas Property | Jun 2026 |
| 1942 | CLYDE | Glasscock County, TX | Oil & Gas Property | Feb 2019 |
| 1943 | CLYDE -B | Ector County, TX | Oil & Gas Property | Apr 2026 |
| 1944 | CLYDE BARROW UNIT 32-41 | Howard County, TX | Oil & Gas Property | Jun 2026 |
| 1945 | CLYDE BLAIR | Freestone County, TX | Oil & Gas Property | Jun 2015 |
| 1946 | CLYDE CLANTON | Howard County, TX | Oil & Gas Property | Oct 2018 |
| 1947 | CLYDE SMITH | Wise County, TX | Oil & Gas Property | Jun 2026 |
| 1948 | CLYDE VAN DUSEN 12 | Culberson County, TX | Oil & Gas Property | Jun 2026 |
| 1949 | CLYDE WILLIAMS UNIT | Robertson County, TX | Oil & Gas Property | May 2026 |
| 1950 | CLYDEAN | Upton County, TX | Oil & Gas Property | Jun 2026 |
| 1951 | CLYDESDALE | Frio County, TX | Oil & Gas Property | Jun 2026 |
| 1952 | CM SHARE CONNER UNIT 45 | Ochiltree County, TX | Oil & Gas Property | May 2026 |
| 1953 | CMAJDALKA | Edwards County, TX | Gas Property | Jun 2026 |
| 1954 | CMC BLUEBONNET 17/29 UNIT | Midland County, TX | Oil & Gas Property | May 2026 |
| 1955 | CMC BUTTERCUP 25-37 UNIT | Midland County, TX | Oil & Gas Property | May 2026 |
| 1956 | CMC CAMDEN-FENWAY 22-34 | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1957 | CMC CANDLESTICK | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1958 | CMC FENWAY 22/34 | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1959 | CMC MARIGOLD 19-31 A 2260BN | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1960 | CMC NIGHTSHADE 17/5 UNIT | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1961 | CMC PEONY | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1962 | CMC PORTERHOUSE | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1963 | CMC RANGER 13-2 UNIT | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1964 | CMC RIBEYE 34/35 | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1965 | CMC SNAPDRAGON 19-31 UNIT | Midland County, TX | Oil & Gas Property | May 2026 |
| 1966 | CMC SUNFLOWER | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1967 | CMC TIGER UNIT | Midland County, TX | Oil & Gas Property | Jun 2026 |
| 1968 | CME UNIT | Gonzales County, TX | Oil & Gas Property | Jun 2026 |
| 1969 | CMF CORPORATION | Sherman County, TX | Gas Property | Jun 2026 |
| 1970 | CML TRUST | Wharton County, TX | Oil & Gas Property | Jan 2025 |
| 1971 | CMTT | Clay County, TX | Oil & Gas Property | Jun 2026 |
| 1972 | CMWW | Dimmit County, TX | Oil & Gas Property | Jun 2026 |
| 1973 | CMWW | Dimmit County, TX | Oil & Gas Property | Jun 2026 |
| 1974 | CMWW HC | Dimmit County, TX | Oil & Gas Property | Jun 2026 |
| 1975 | CMWW UNIT | Dimmit County, TX | Oil & Gas Property | Jun 2026 |
| 1976 | CN UNIT | La Salle County, TX | Oil & Gas Property | Jun 2026 |
| 1977 | CNB G 345 | Lipscomb County, TX | Oil & Gas Property | Jun 2026 |
| 1978 | CNB TRUSTEE | Lipscomb County, TX | Oil & Gas Property | Jun 2026 |
| 1979 | CNG V | Hidalgo County, TX | Oil & Gas Property | Mar 2019 |
| 1980 | COACHWHIP 17-2 | Howard County, TX | Oil & Gas Property | Jun 2026 |
| 1981 | COACHWHIP 25 | Winkler County, TX | Oil & Gas Property | Jun 2026 |
| 1982 | COALE | Reeves County, TX | Oil & Gas Property | Apr 2026 |
| 1983 | COAN | Comanche County, TX | Oil & Gas Property | May 2026 |
| 1984 | COASTAL FEE | Hidalgo County, TX | Oil & Gas Property | Jun 2026 |
| 1985 | COATES | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 1986 | COATES | Eastland County, TX | Oil & Gas Property | Jun 2026 |
| 1987 | COATES | Starr County, TX | Oil & Gas Property | Jun 2026 |
| 1988 | COATES | Coleman County, TX | Oil & Gas Property | Apr 2026 |
| 1989 | COATES | Hood County, TX | Oil & Gas Property | Mar 2026 |
| 1990 | COATES | Hidalgo County, TX | Oil & Gas Property | Jun 2026 |
| 1991 | COATES | Karnes County, TX | Oil & Gas Property | Jun 2026 |
| 1992 | COATES | Pecos County, TX | Oil & Gas Property | Jun 2026 |
| 1993 | COATES -B-MARATHON UNIT | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 1994 | COATES B - COATES A UNIT | Reagan County, TX | Oil & Gas Property | Jun 2026 |
| 1995 | COATES DOLLYE 69 | Crockett County, TX | Oil & Gas Property | Jun 2026 |
| 1996 | COATES F G | Hidalgo County, TX | Oil & Gas Property | Jun 2026 |
| 1997 | COATES GEORGE H | Zapata County, TX | Oil & Gas Property | Jun 2026 |
| 1998 | COATES J. C. 1 | Eastland County, TX | Oil & Gas Property | Jun 2026 |
| 1999 | COATES SS | Starr County, TX | Oil & Gas Property | Jun 2026 |
| 2000 | COATES Y | Hidalgo County, TX | Oil & Gas Property | Jun 2026 |