Paragon Banking Group said chairman Bob Dench was standing down to take up a new position as chairman of The Co-operative Bank.
Paragon said it had well developed succession plans and a search for his replacement, both internally and externally, was already underway.
Dench would join The Co-operative Bank on 14 March and would remain as Paragon chairman until his successor was appointed.
A further announcement will be made when appropriate.
At 1:02pm: (LON:PAG) Paragon Banking Group PLc share price was -4.1p at 491.3p