A fourth-generation member of the family, he had been expected to become chairman of Robert Fleming & Co., an asset merchant bank and asset manager, in 2000, but the business was sold to Chase Manhattan Bank for £4.4 billion (then US$7.7 billion).[4] In July 2005, The Times wrote "The £4.4bn price tag seemed full at the time. It seems even more generous now".[5][4]
About 130 family members received over £1.3 billion for their 30% holding, and this money was largely invested through the privately owned family office Fleming Family & Partners (FF&P) which Fleming founded that year.[4][6] In 2007, he was its largest shareholder.[6]
In 2003, his net worth was estimated at £1.05 billion.[2] In 2008, the Sunday Times estimated his net worth at £1.9 billion.[7]
In 2012, "hard-hit" investments in mining and finance led Fleming to put up for sale two farms bordering his Sarsgrove estate near Chipping Norton, totalling 700 acres and valued in excess of £4 million.[8]