SEI Investments, the US multi-manager, saw assets increase by 21% at the end of September 2003, compared with the same time period last year. The increase includes its largest mandate win in the UK.

SEI's assets increased to $87.4bn (€75.4bn) from $72.2bn the year before and revenues by 5% to $161,056 from $153,316. Assets increased by 2% between June and September this year.