| S-M PETROLEUM PROPERTIES, INC.Littleton, CO · Merged | Littleton, CO | Corporation | Nov 30, 1976 | Merged |
| SMITH-MEDSKER EAGLE, INC., Delinquent October 1, 2005Littleton, CO · Delinquent | Littleton, CO | Corporation | Aug 6, 1985 | Delinquent |
| SMITH-MEDSKER LEADVILLE, INC., Delinquent November 1, 2005Littleton, CO · Delinquent | Littleton, CO | Corporation | Sep 11, 1985 | Delinquent |
| S-M PETROLEUM VAIL, INC., Delinquent November 1, 2005Littleton, CO · Delinquent | Littleton, CO | Corporation | Sep 29, 1987 | Delinquent |
| FEATHER-MEDSKER-SMITH DELTA, INC., Dissolved November 6, 2000Littleton, CO · Voluntarily Dissolved | Littleton, CO | Corporation | Jun 21, 1988 | Voluntarily Dissolved |
| S-M PETROLEUM GYPSUM, INC., Delinquent September 1, 2005Littleton, CO · Delinquent | Littleton, CO | Corporation | Jul 15, 1992 | Delinquent |