The Jeremy and Hannelore Grantham Environmental Trust was formed in 2005 by Jeremy Grantham, Co-Founder and Chief Investment Strategist of Grantham, Mayo, Van Otterloo (GMO) and his wife Hannelore. GMO currently manages approximately $68 billion in a variety of strategies for institutional investors.

The Trust is a US 501(c)(3) public charity and a Type II 509(a)(2) supporting organization that supports charities whose mission is environmental protection, with particular focus on the developing world.

The Trust's endowment is approximately $250 million and trustees include leaders from The Nature Conservancy, The World Wildlife Fund-US and Rare, in addition to Jeremy and Hannelore Grantham.