It's not clear to me who actually owns it.
Is it:
Toby Venter, CEO of Porsche South Africa (probably, via some sort of holding company)
Porsche South Africa (maybe)
Porsche AG (highly unlikely)
http://www.financialmail.co.za/fmfox...ck-in-the-race
It was bought to save it from being ripped up and turned into an office park. As the story above (from 2014) mentions, the track already makes money from corporate activities.
Thank goodness it has been rescued by a successful business operator who also happens to be mad about racing and who runs Porsche SA.