Winthrop Hiram "Win" Smith (June 30, 1893 – January 10, 1961) was an American businessman and investment banker.

[2] Smith, who began as a junior runner and clerk at Merrill, was groomed by founder and Amherst alumnus Charles E.

[1] Smith's career would span more than four decades, and he would ultimately serve as directing partner of the firm.

[1] Smith is often credited, along with the innovative advertising manager he had hired, Louis Engel, Jr. (1909 - 1982),[3] for helping to realize Charles E. Merrill's aim of bringing Wall Street to Main Street, and received both respect and affection from his colleagues in the industry and at his firm.

[4] In 1958, Smith handed over day-to-day control of the firm, at the time known as Merrill Lynch, Pierce, Fenner & Beane.