Rowanmoor Pensions sales have almost doubled in the first quarter of its financial year.
Sales in the final quarter of 2009 increased 88% between the firm's SIPP, SSAS and family pension trust products.
Rowanmoor launched its SIPP product in April 2009, after the end of a non-competition agreement with James Hay.
The firm says its priority attitude to providing high service levels for clients and their advisers was pivotal in its strong performance.
Managing director Ian Hammond says: "We are delighted with the increase in new business over the past quarter. In fact, new business also increased steadily through 2009, up to the end of our last financial year; a time when many businesses in the industry suffered."
60+ £300bn ISA savings
Total funds on list rise from 26 to 58
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Q2 net sales dropped almost 50%