| Relationships | Role | Relationship Start | Relationship End |
| Mercantile Bank Of St. Louis National Association | Parent | 6/21/1997 | 8/18/1997 |
| Mark Twain Bank | Parent | 3/1/1986 | 6/20/1997 |
| Mark Twain St. Louis Bank, National Association | Parent | 12/31/1983 | 2/28/1986 |
| Mark Twain Bancshares, Inc. | Parent | 12/29/1979 | 12/30/1983 |