Jay Cooke, American financier, founded Jay Cooke & Company (d. 1905)

Jay Cooke (August 10, 1821 – February 16, 1905) was an American financier who helped finance the Union war effort during the American Civil War and the postwar development of railroads in the northwestern United States. He is generally acknowledged as the first major investment banker in the United States and creator of the first wire house firm.