Assets the Transact platform fell by 4.4 per cent in the three months to the end of December 2018, driven by adverse market conditions.
In a market update published by Transact’s parent company, IntegraFin, the platform revealed it had assets of £31.6bn, compared with £33.1bn at the start of the quarter.
The platform attracted net inflows of £884m, but adverse market conditions caused assets to fall.
The £31.6bn figure was nonetheless higher than the £29bn of assets on the platform at the end of 2017.
Ian Taylor, Transact's chief executive, said: "I am pleased to report that funds under direction proved generally resilient over the quarter when compared to movements in world equity markets.
"Inflows and net flows both fell a little from the levels of the previous quarter – but so, also, did outflows."
Outflows were £509m, compared with £537m in the previous quarter, though both figures were higher than the level of outflows for the last quarter of 2017, which was £396m.
Integrafin listed on the stock exchange in February 2018, with a valuation of £650m.
The shares are currently valued at £3.35, having listed at a price of £2.53.