Purpose – The aim of this paper is to discuss the case of Milan “Fuorisalone” (literally “outside the fair”) - now renamed Milano Design Week - as the result of a long-term transformation that led to its current configuration, characterised by a complex business model (Smith, Binns and Tushman, 2010), where many actors and stakeholders interact in a network of cooperation and competition. The paper highlights how this transformation was led by the design culture (Deserti and Rizzo, 2014; Concilio, Deserti and Rizzo, 2014) as a pervasive character of the city. The analysis of the case compares the Milano Design Week business model with the fair business model, focusing on the elements of differentiation and on the scaling up mechanisms. In a...