| Relationships | Role | Relationship Start | Relationship End |
| Community Banker Services Corporation | Parent | 6/30/2007 | |
| Community Banker Services Corporation | Parent | 6/30/1993 | 6/29/2007 |
| Westamerica Bank | Parent | 12/14/1987 | 6/29/1993 |
| Westamerica Bancorporation | Parent | 9/5/1980 | 12/13/1987 |