| Relationships | Role | Relationship Start | Relationship End |
| Mercantile Bank Of St. Louis National Association | Parent | 6/21/1997 | 8/18/1997 |
| Mark Twain Bank | Parent | 7/1/1991 | 6/20/1997 |
| Mark Twain Bancshares, Inc. | Parent | 9/1/1981 | 6/30/1991 |
| Relationships | Role | Relationship Start | Relationship End |
| Mercantile Bank Of St. Louis National Association | Parent | 6/21/1997 | 8/18/1997 |
| Mark Twain Bank | Parent | 7/1/1991 | 6/20/1997 |
| Mark Twain Bancshares, Inc. | Parent | 9/1/1981 | 6/30/1991 |