Universitas 21 is an international network of 23 leading research-intensive universities in fifteen countries. Collectively, its members enrol over 830,000 students, employ over 145,000 staff and have approaching 2.5 million alumni. Their collective budgets amount to over US$25bn and they have an annual research grant income of over US$4bn. The network's purpose is to facilitate collaboration and cooperation between the member universities and to create opportunities for them on a scale that none of them would be able to achieve operating independently or through traditional bilateral alliances.