AIB has confirmed the completion of the merger of its US subsidiary Allfirst with M&T Bank corporation.
The €2.75bn deal came after revelations of trader John Rusnak's €690m foreign exchange losses.
AIB chief executive Michael Buckley said that excellent progress had been made in the transition of Allfirst into M&T.
The bank also confirmed the sale of its New York retail branch to M&T, although it will retain its not-for profit, and corporate businesses in the US.
M&T chairman Bob Wilmers joins the AIB board from today.
