Chapter 5‘s discussion of Stockholm examines its success as a hub for CleanTech innovation and entrepreneurship. Stockholm is now the second most prolific tech hub in the world on a per capita basis. The chapter argues that the city’s success derives from a symbiotic and mutually supportive relationship among government, industry, research centers, and academia, as well as favorable relations with numerous civil society groups represented in the city. It shows how Stockholm’s collaborative culture makes the hub function well. Stockholm represents an example of success for capital city innovation where there is extensive collaboration among the various actors.