Kiewit Plaza is one of the tallest buildings in Omaha, Nebraska. Located at 3555 Farnam Street at the corner of S 36th Street and home to the headquarters of Berkshire Hathaway since 1962 when Warren Buffett dissolved his six partnerships into one partnership headquartered in this building. It is named after Peter Kiewit's construction company, Peter Kiewit Sons', a company once considered as the most profitable construction company in the world and once called "Colossus of Roads"., which is also headquartered in the building.