Industry superannuation fund AustraliaSuper's business development team has signed on 180 corporate funds since it was established six months ago.
AustralianSuper is now the default superannuation fund for these companies.
The business development team had contacted around 3000 employers, with 800 expressing further interest, AustralianSuper general manager of growth and opportunities Paul Schroder said.
The companies who have outsourced their superannuation to AustralianSuper are small to medium-sized firms with 100 to 500 employees.
"We have been very encouraged by the growth of our corporate superannuation business, particularly in New South Wales," Schroder said.
"We are now looking at whether to adopt a similar strategy in other states."
He said the companies were impressed by AustralianSuper's investment performance and offerings.
"They saw even further benefit when they compared us with retail superannuation funds," he said.
The business development team was set up in Sydney in May as part of the fund's strategy to grow its business in NSW.
The team is staffed by four former retail sector employees.