First Security Corporation was a multistate bank holding company in the western United States, primarily in Utah, Idaho, New Mexico, Oregon, Nevada, and Wyoming.

Headquartered in Salt Lake City, Utah, First Security merged with Wells Fargo in 2000.

The two sons, together with Marriner A. Browning, expanded their financial interests to 17 banks and a building and loan company, later brought under one holding company, First Security Corporation, in June 1928.

In 1932, First Security acquired Deseret National Bank, which had been founded in 1871 by Brigham Young.

It then moved its headquarters from Ogden to Salt Lake City.