Latitude Group has requested its shares be suspended from trading on the Australian Stock Exchange, with its platforms currently offline due to an active cyber attack affecting over 300,000 customers.
The attack on Latitude is now the subject of an investigation by the Australian Federal Police.
Latitude has also engaged external cyber security experts, the Australian Cyber Security Centre, and other relevant government agencies.
Latitude Financial services a number of major Australian retailers, including David Jones which has a ten-year contract with the firm.
"Our people are working around the clock to contain the attackers," Latitude said in a statement.
"We have taken the prudent action of isolating some of our technology platforms which means that we are currently not onboarding new customers. Because the attack remains active, we have taken our platforms offline and are unable to service our customers and merchant partners.
"We cannot restore this capability immediately, however we are working to do so gradually over the coming days and ask our customers for their continued patience. Our restoration of these services is aligned to our forensic review. In conjunction with our cyber-security experts, we are continuing our forensic review of our IT platforms to identify the full extent of the theft of customer information as a result of the attack on Latitude."