PensionBee has surpassed £3 billion in assets under administration.
The online pension provider, headquartered and listed in London, hit the milestone in November following rapid growth this year.
It said it had been delivered despite macroeconomic volatility and was driven by a combination of high customer retention and strong net inflows.
The company recently moved to the premium segment of the London Stock Exchange.
“The ongoing growth in our assets under administration results from our commitment to delivering outstanding customer service and helping more people prepare for a happy retirement,” said CEO Romi Savova.
“We are growing the business in line with our ambitions while helping to meet the country’s ever greater need for long-term retirement planning and preparedness.”