Investor

n. one who invests

An investor is any party that makes an investment.The term has taken on a specific meaning in finance to describe the particular types of people and companies that regularly purchase  equity or  debt  securities  for financial gain in exchange for funding an expanding company. Less frequently, the term is applied to parties who purchase real estate, currency, commodity  derivatives, personal property, or other assets.
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Noun
1. someone who commits capital in order to gain financial returns
(hypernym) capitalist
(hyponym) contrarian
(derivation) invest, put, commit, place

n. investor, one who invests

(n.)
One who invests.