Mainstream Group Holdings Limited is an Australian-based company that provides fund administration and custodian services to the financial services industry globally. The company offers investment administration, fund accounting, unit registry, middle office, corporate services, and distressed assets administration to fund managers and listed companies. It also provides superannuation services including member administration, unit pricing, and accounting services to industry funds, retail superannuation master trusts, and corporate superannuation funds. Additionally, the company offers registry services such as listing, transaction processing, and reporting and correspondence services to exchange-traded products. Mainstream Group Holdings Limited was founded in 2006 and was formerly known as MainstreamBPO Limited, and it changed its name in September 2017.