150 North Riverside Plaza is a highrise building in Chicago, Illinois, completed in 2017 and anchored by William Blair and Co. The building is 54 stories tall and was designed by Goettsch Partners. The building occupies a two-acre site on the west bank of the Chicago River, whose size and location demanded an unusually small base for the building. The building features 1.2 million square feet (110,000 m2) of leasable office space. Due to its unique superstructure design, it encompasses just 25 percent of the lot. In 2019, the building was given the Chicago Chapter of the American Institute of Architects' highest award for design excellence.