Interactive Brokers, page-5

I'm surprised you could send an email. I have never found one or a 1300 phone no.

It may also not have come to your notice that any shares you buy are never transferred to your registry. If IB fail, you may do as well as I did when Sonray failed, get a few cents in the dollar after the liquidators stuff around for years. Others here lost a lot with OpesPrime too. I have been assured that IB are sound, but Sonray was guaranteed by an international bank, but the directors stole much of the deposits and the liquidators most of the rest.

They would IMO be unsuitable for a super fund.