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. The firm opened their first branch in New York City in 1937, and has since expanded all over the world, with regional offices in San Francisco, Los Angeles, Washington, D.C., London, Hong Kong, Shanghai, Mumbai and Dubai.
With a portfolio spanning thousands of projects across 50 countries, SOM is one of the largest architectural firms in the world. Their primary expertise i ...
s in high-end commercial buildings. They have designed several of the tallest buildings in the world, including the John Hancock Center (1969, second tallest in the world when built), Willis Tower (1973, tallest in the world for over twenty years), and Burj Khalifa (2010, currently the world's tallest building).