Provides an overview of key outcomes from the Caring for Climate Business Forum (7-8 December 2015, Paris) during the twenty-first Conference of the Parties COP21 climate negotiations. The Forum demonstrated unprecedented corporate engagement at bringing together over 600 chief executives and senior representatives from the private and public sectors to discuss the integral role of business in advancing the climate agenda and demonstrate support for an ambitious international climate agreement. Co-organized by the United Nations Global Compact, United Nations Framework Convention on Climate Change (UNFCCC) secretariat and United Nations Environment Programme (UNEP), the third annual Caring for Climate Business Forum served as the official platform for business at COP21 and included the Lima-Paris Action Agenda (LPAA) Focus Event on Business.