100 First Plaza (also known as the Delta Dental Tower) is a 27-story, high-rise office building located at 100 First Street in the Financial District of San Francisco, California. Construction of the building was completed in 1988. It is the 35th-tallest building in the city. Skidmore, Owings & Merrill served as the design architects for the 100 First Plaza development that was designed with several setbacks, along with a grooved and faceted façade, and contains several rooftop curtain walls, and a notable spire. Tenants ADR Services, Inc. AppsFlyer Andersen Tax HomeLight Okta See also San Francisco's tallest buildings References External links Official website Financial District, San Francisco Skyscraper office buildings in San Francisco Skidmore, Owings & Merrill buildings Office buildings completed in 1988 Leadership in Energy and Environmental Design gold certified buildings