Bank Leu
| Leu's former headquarters in Zürich, Switzerland | |
| Industry | Private banking | 
|---|---|
| Founded | 1755 | 
| Defunct | 2007 | 
| Fate | Merged into Credit Suisse | 
| Successor | Clariden Leu | 
| Headquarters | Zürich, Switzerland | 
| Website | www | 
Bank Leu AG (/lɔɪ/; LOY; formerly Leu et Compagnie respectively Leu & Co.) was a Swiss private bank which was headquartered in Zürich, Switzerland. Since 1990 it operated as subsidiary of Credit Suisse and has been the oldest Swiss bank. In 2007, Leu merged with other private banking units, to form Clariden Leu.