NAB has been trying to offload Clydesdale for several years particularly after it racked up big losses on property loans and charges for mis-selling PPI.
Initial hopes that it could get more than £2 billion for the bank have been scaled back and at 180p, which the bank said meant the share offer was “multiple times covered”, it is valued at £1.6 billion.
Only 25% of Clydesdale equity has been offered to the public with the remaining 75% given to NAB shareholders.
Elsewhere in the sector, Swiss bank UBS’s profits jumped 79% to Swfr6.2 billion (£4.2 billion) last year as it showed the benefits of slashing back its investment bank earlier than most rivals.
But a surprise outflow of funds from its wealth management arm in the fourth quarter took the gloss off the figures and the shares dropped more than 7%.