The Rockefeller Foundation has long recognized the importance of meaningful engagement of the private sector in addressing many of the world’s most complex problems. While many social sector leaders understand that engaging the private sector matters, far fewer understand how to do so, or the key questions one should consider before starting down this path of cross-sector collaboration. For instance: Why would a network want to include a company? Or conversely, why would a company want to participate in a network focused on social impact? Can social impact efforts deliver business value? What makes network relationships durable? And ultimately, what are the different needs around accountability, leadership, governance and mindset? To answer questions such as these, The Foundation and our partners at Monitor Institute, a part of Deloitte Consulting LLP, have created “PARTICIPATE: The power of involving business in social impact networks”—a handbook for social change leaders aspiring to effectively engage the private sector as authentic participants in the pursuit of social impact.