John Duffield (born June 1939) is the founder of Jupiter Fund Management, one of the largest funder managers operating in London.
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Born the son of a Doctor and educated at Harrow School, Duffield went into investment management and, having become manager of his wife's estates, moved to Switzerland as a tax exile.[1] He founded Jupiter Asset Management in 1985.[2] After selling Jupiter Asset Management to Commerzbank, he founded New Star Asset Management in 2001.[2]
He was married to Vivien Clore but was divorced from her in 1976; they had one son and one daughter.[1] He now has a long-time partner, Suzy.[1]