Henderson Global Investors brought in £5bn of net inflows in the first half of 2013 thanks to its growing international retail business.
Retail client net inflows rose to £4.7bn over the six months to 30 June, up from £600m in the same period in 2013.
Underlying profit before tax rose to £90.7m, up from £88.5m in the first half of last year whilst management fee income increased to £193m, up 21 per cent from £160.5m in 2013.
Institutional net inflows stood at £300m compared to outflows of £2bn in 2013.
Dividend payouts were 2.60p per share, up from 2.15p per share the previous year.
Henderson adds the acquisition of Geneva Capital Management announced on 30 June will increase US assets by around 15 per cent.
Henderson chief executive Andrew Formica says: “We are starting to see early results from some of our previous investments, including mandate wins for our Global Equities strategy and excellent first year performance from our US high yield team.
“We continue to add resources in investment management and distribution and are enhancing our global platforms. I was delighted to be able to announce the acquisition of Geneva Capital Management at the end of June, to add US equities capability to our business and extend our US institutional client base.”