Neighborhood 91 in Pittsburgh is actively expanding as a comprehensive site that integrates multiple stages of the additive manufacturing (AM) supply chain. Located near Pittsburgh International Airport, the development is overseen by the nonprofit Regional Industrial Development Corporation (RIDC) on land owned by the Allegheny County Airport Authority. Of the 195-acre master plan, one building is currently operational and a second is under construction, with continued efforts underway to attract new tenants and grow the site’s industrial footprint.