Under the terms of the agreement, financial services firm Diversa will take a 100 per cent interest in the superannuation business for $2.65 million.
Perpetual acquired the third party superannuation business when it entered into a scheme of arrangement with The Trust Company in 2013.
The Trust Company (Superannuation) provides third party trustee services to 15 superannuation funds with approximately $3.1 billion in assets.
Diversa has also announced it will take a 30 per cent interest in Tranzact Financial Services (TFS) for $2.85 million, with an option to acquire the remaining 70 per cent.
"TFS provides administration, promotion and investment management services to the Smartsave ‘Members Choice’ Superannuation Master Plan, a $208m fund with approximately 11,000 members," Diversa said in a statement to the ASX.
"The TFS business is highly complementary with Diversa’s existing superannuation promotion, administration, and investment management business unit, which is also located in Sydney," said the statement.