Jupiter Fund Management’s total assets under management (AuM) rose to £33.1 billion at the end of June 2014, compared with £29 billion a year ago.
The group attributed the rise in AuM to net flows to mutual funds and segregated mandates in the second quarter.
Half year profit before tax fell to £48.4 million as a result of the inclusion in the previous year of a £6.7 million gain on the sale of its Cofunds stake.
Net inflows were £1.3 billion for the six months ending 30 June 2014, compared to £400 million a year ago.
Management fees climbed by £10 million to £141 million, despite the group’s fee margin being lower.
Commenting on the results, Jupiter CEO Maarten Slendebroek said: "Our potential for future growth depends on continual successful investment in our fund management, distribution and support infrastructure capabilities.
"Our organic growth strategy ensures these areas require very little in the form of capital but, in any particular period, operating costs can come on stream before associated revenues. We are mindful of this effect and look to ensure that we manage our fixed cost base according to prevailing market conditions at the time, so we can grow the business over time while preserving our scalable operating model."