Jacob Little (March 17, 1794 – March 28, 1865) was an early 19th-century Wall Street investor and the first and one of the greatest speculators in the history of the stock market, known at the time as the "Great Bear of Wall Street". Little was born in Newburyport, Massachusetts, and moved to New York City in 1817, first clerking for Jacob Barker; he then opened his own establishment in 1822, and finally his own brokerage in 1834.