Martin Brookes, chief executive of the Paul Hamlyn Foundation, has left "by mutual agreement" after just over a year in the role, the charity has said.
A statement on the foundation's website, dated 18 July, said that Brookes was leaving after carrying out a strategic review.
"Martin has been director since June 2013, and in this time he has led the foundation's strategy review and the development of plans for its future," the statement said. "These are now well under way."
Nobody from the foundation, which is one of the UK’s largest grant-makers, was available to answer further questions about Brookes’s departure.
Brookes joined the charity after 18 months at the investment firm Fulcrum Asset Management as an economist, after a 10-year career at the think tank New Philanthropy Capital, latterly as its chief executive.
A statement from Brookes said: "I am proud to have led the Paul Hamlyn Foundation and helped it to think through its future strategy. I did this in a way that encouraged openness and debate as well as contributions from outside, bringing in opinions from across the range of fields that the foundation supports. It was a privilege to work with talented people in the organisation and beyond."
Jane Hamlyn, chair of the Paul Hamlyn Foundation, said: "I am grateful to Martin for his work with our trustees and our team in helping to shape our new strategy. The building blocks of this are now in place. We wish Martin well for the future."