Business model innovations are recognised as a key to the creation of sustainable business. Although the question of how companies can transform their business models to become more sustainable is highly relevant for the society and management, it is poorly understood, and the adoption of the strategies by firms has been slow. The goal of my research is to understand how the transition towards more sustainable business models will be achieved. The objective is to increase understanding about how to build competitiveness in business models through sustainability and to recognise new exceptional sustainability opportunities for firms. The research increases understanding on sustainable business model innovation by examining the favourable conditions and mechanisms through which sustainability could be effectively built in business models. The research will have practical implications for managers aiming to change their business models to be more sustainable by shedding light on the role of the network collaboration on sustainable value creation and capturing, and by developing supportive tools for sustainable business model development.