Cofunds has extended its lead as the UK's largest platform, with assets rising to £45bn, according to the Platforum's latest pricing guide.
The platform posted 35% year-on-year growth of assets under administration (AUA) in the period ending 30 September, taking its total to £45.04bn.
Rival platforms Skandia (£40.64m) and Fidelity FundsNetwork (£38.35m), grew 10% and 17% respectively.
The largest risers in percentage terms included Aviva (up 74% to £1.06bn), Axa Elevate (up 56% to £4.79bn) and Novia (up 52% to £1.51bn).
The report also contains a number of tables on platform administration fees, which managing director Holly Mackay (pictured) said were still "extremely hard" to compare.
"By the time you think about headline fees, rebates, transaction fees, tax wrapper fees, tiers and bands, interest on cash - the list goes on," she said.
"At the end of the day, pricing is just one part of the platform selection process - but it's an important one and difficult to assess."
Paul Bruns and Elaine Parkes
3,000 left to transfer
Record numbers of people aged 90 plus
From 3 to 10 October