| Relationships | Role | Relationship Start | Relationship End |
| Mark Twain Bancshares, Inc. | Parent | 10/21/1988 | 11/24/1988 |
| Bancenter One Group, Inc. | Parent | 9/11/1985 | 10/20/1988 |
| Bancenter One Group, Inc. | Parent | 10/25/1984 | 9/10/1985 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Mark Twain Bank | Buyer | 2,182,610 | Discontinued | 11/25/1988 | |
| Bankcenter One/St. Charles | Seller | 12,652 | Discontinued | 8/8/1986 |