Aon is one of the largest investment consulting and OCIO firms in the world, with over US$2.8 Trillion in assets under advisement and management (as of 31 March 2023). For more than 40 years, Aon has supported the missions of non-profit organizations. Aon has well-established capabilities across the full spectrum of Responsible Investment approaches. Aon signed the Principals of Responsible Investment in 2006.