| Relationships | Role | Relationship Start | Relationship End |
| Chemical Financial Corporation | Parent | 10/10/1980 | 12/15/1985 |
| Northern States Bancorporation, Inc. | Parent | 3/8/1974 | 10/9/1980 |
| West Shore Computer Services, Inc. | Subsidary | 10/10/1980 | 12/15/1985 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Chemical Bank West | Buyer | 914,347 | Discontinued | 12/16/1985 |