| Relationships | Role | Relationship Start | Relationship End |
| First Interstate Of Iowa, Inc. | Parent | 2/6/1991 | 6/30/1991 |
| First Interstate Of Iowa, Inc. | Parent | 9/1/1974 | 2/5/1991 |
| Kossuth Security Investment Company | Parent | 12/31/1972 | 8/31/1974 |
| Kossuth Security Investment Company | Parent | 12/31/1970 | 12/30/1972 |
| Security Agricultural Credit Corporation | Subsidary | 12/31/1976 | 6/30/1991 |
| Security Building Corporation | Subsidary | 12/31/1970 | 6/30/1991 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Boatmen's Bank Of North Iowa | Buyer | 226,729 | Discontinued | 7/1/1991 | |
| Exchange State Bank | Seller | 14,862 | Discontinued | 12/31/1982 | |
| Bode State Bank | Seller | 7,386 | Discontinued | 12/31/1982 | |
| Farmers State Bank | Seller | Discontinued | 6/18/1962 |