The story
Founded by Dermot Desmond in 1981.1
During the 1980s after Ireland's two biggest banks Allied Irish Banks and Bank of Ireland took interests in stockbroking firms, NCB was sold to Ulster Bank, a subsidiary of National Westminster Bank.
After National Westminster was taken over by the Royal Bank of Scotland, NCB was bought out by its management with the assistance of Sean Quinn.
NCB sold its money broking arm to management and employees in 2004.
Investors in a fund started by the venture capital arm of NCB, NCB Ventures, realized a 75% return on their investment when the fund closed in 2006.
From Wikipedia’s article on NCB Group, shared under CC BY-SA 4.0.3