The investment platform said assets under administration rose 9% to a record £40.6bn in the three months to March 31, boosted by net inflows of £800mln, defined benefit (DB) pension transfers of £200mln and favourable market movements of £2.3bn.
DB pension transfers to the advised platform continued to decline but still contributed to inflows during the quarter.
Customer numbers grew by 5% to a new high of 200,922.
“Trading in the second quarter of our financial year remained robust despite continued weak investor sentiment,” said AJ Bell chief executive Andy Bell.
“We continued to attract new customers and assets to our platform, with both measures hitting new highs during the period.
“This positions us well for an improvement in investor sentiment.”
Shares ticked up 0.5% to 379p in morning trading.