In a trading update issued today, Rathbone Brothers revealed the investment management arm saw a total annualised rate of inflows of 6.2%, down from 7.5% in 2011.
This included acquired funds under management of £486m up from £305m in the previous year.
Total funds under management for RIM reached £16.71bn at the end of the year, up 13.2% from £14.76bn year-on-year.
Rathbones said this compared to a 5.9% increase in the FTSE 100 Index and a 5.8% from the FTSE Apcims balanced index over the same period of time.
Organic growth in funds under management for RIM was 3% in the year to December, compared to 5.4% in 2011.
Meanwhile, the company’s unit trust business fared better, with its funds under management jumping 16.5% year-on-year to £1.27bn, from £1.09bn at the end of December 2011.
But inflows were still slower than a year earlier, as it reported total net fund inflows of £14m in the fourth quarter, down from £35m in the equivalent period a year earlier, and £66m for the full year compared to £97m for 2011.
The company said it was looking forward to 2013 with optimism, following a challenging 2012.
