In the past four decades, the centre of economic power has moved from industry to finance. Against this backdrop, the financialization of the water industry has made the hydrosocial cycle more complex, witnessing the emergence of new financial logics and financing instruments. This change has thoroughly transformed the relation between infrastructures and water companies, citizens, other water users and the environment. In this article, and based on previous work, I present a summary that debates around the financialization of the water cycle, through the example of the provision and development of financialized water infrastructures in London.