The $3.659 billion Leona M. and Harry B. Helmsley Charitable Trust has significantly increased its investment in the Chilton Global Natural Resources fund. According to the foundation's 990-PF, the foundation had $117.83 million invested in the fund as of March 31, 2011, the most recent data available, up from $11.82 million at March 31, 2009. This seems to be part of a strategy to increase the foundation's overall exposure to alternative investments. The trust now has $864 million in hedge fund and private equity investments up from $159 million as of March 31, 2009. Other hedge fund and private equity managers include Marathon-London, Och-Ziff, J.P. Morgan Asset Management, Highbridge and Brevan Howard.