J. & W. Seligman & Co., founded in 1846, was a prominent U.S. investment bank c. 1860s–1920s until the divestiture of its investment banking arm in the aftermath of the Glass–Steagall Act. The firm was involved in the financing of several major U.S. railroads in the 1870s and the construction of the Panama Canal in the early 1900s. Seligman was also involved in the formation of Standard Oil and General Motors.
Today, the firm operates an investment management business under the brand Seligman Investments. Seligman provides separately managed accounts and retirement services and also operates a series of mutual funds.