There is a growing call for more network-level research on sustainability within marketing that avoids a narrow interorganisational focus. Business networks have a crucial role to play in reorganising and innovating to achieve sustainability and are met with significant challenges because of the scale and scope of changes necessary. We propose connectedness as central to understanding networked, interorganisational responses to the sustainability shift. We contribute by highlighting how systemic interdependence across organisations, which is developed through business network connectedness, is core to achieving sustainable networks and sustainable markets. The text provides an overview of current research on sustainability in business networks before synthesizing six new articles that address multiple sustainability challenges. The editorial concludes with an agenda for further research arranged around four main themes, including network dynamics and measuring and valuing in investigating the transformative change needed by all business sectors.