| Relationships | Role | Relationship Start | Relationship End |
| M&I Llc | Parent | 12/29/2000 | 3/31/2001 |
| M&I Llc | Parent | 2/29/1988 | 12/28/2000 |
| M&I Llc | Parent | 2/28/1988 | 2/28/1988 |
| Central Wisconsin Bankshares, Inc. | Parent | 12/31/1980 | 2/27/1988 |
| Central Wisconsin Bankshares, Inc. | Parent | 12/31/1978 | 12/30/1980 |
| Central Wisconsin Bankshares, Inc. | Parent | 5/31/1977 | 12/30/1978 |
| M&I Eagle River Investment Corporation | Subsidary | 7/1/1991 | 3/31/2001 |
| M&I Eagle River Holdings, Inc. | Subsidary | 1/1/1999 | 3/31/2001 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| M&I Marshall And Ilsley Bank | Buyer | 44,975,270 | Pooling of Interests | Discontinued | 4/1/2001 |