SOM Logo, Skidmore Owings Merrill

Skidmore, Owings & Merrill LLP (SOM) is an American architectural, urban planning, and engineering firm. It was formed in Chicago in 1936 by Louis Skidmore and Nathaniel Owings; in 1939 they were joined by John O. Merrill.
SOM Logo, Skidmore Owings Merrill