investment bank
noun [ C ]
BANKING, FINANCE ukusa bank that helps companies and organizations to buy and sell shares, bonds, etc. and helps companies to buy or merge (= join) with other companies:
The successful bid was led by an investment bank.
The telecoms analyst at the investment bank estimated that the business was worth around €1bn..
big/large/major investment banks
an American/British/Japanese investment bank
a Wall Street/City investment bank