| Relationships | Role | Relationship Start | Relationship End |
| Onbancorp, Inc. | Parent | 1/1/1993 | 3/31/1998 |
| Midlantic Corporation | Parent | 8/31/1989 | 12/31/1992 |
| Irving Bank Corporation | Parent | 7/1/1966 | 8/30/1989 |
| Unb,Rel. Corp. | Subsidary | 1/16/1993 | 3/31/1998 |
| Data Crossroads, Inc. | Subsidary | 1/16/1993 | 3/31/1998 |
| Council House Realty Corporation | Subsidary | 1/1/1997 | 3/31/1998 |
| Oncorp Realty Credit Inc. | Subsidary | 1/16/1993 | 3/31/1998 |
| Oncorp Insurance Brokerage Services Inc. | Subsidary | 1/16/1993 | 3/31/1998 |
| Ob&T Reit, Inc. | Subsidary | 1/31/1996 | 3/25/1998 |
| Market Block Liquidation Corporation | Subsidary | 1/16/1993 | 9/18/1995 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Manufacturers And Traders Trust Company | Buyer | 126,239,147 | Acquisition | Discontinued | 4/1/1998 |
| Onbank | Seller | 476,717 | Pooling of Interests | Discontinued | 1/1/1997 |
| Columbia Banking Federal Savings Association | Seller | 646,294 | Failure | 6/4/1994 | |
| Onbank & Trust Co. Of Albany | Seller | 223,598 | Discontinued | 1/16/1993 | |
| The First National Bank Of Moravia | Seller | 38,356 | Discontinued | 7/27/1990 | |
| First National Bank Of Lacona | Seller | Discontinued | 2/3/1964 | ||
| Cicero State Bank | Seller | Discontinued | 3/1/1961 |