All my shares are in an nominee account.
In a sense you remain anonymous to the company's on its share register
But this is really I choice I have made as when selling shares you have to get the scrip in good order (45 years ago this was a problem as your customer had to sign a release form to allow the banks to get in good order and surrender the scrip in 14 days (then). So to obviate this problem we used to get the customer to keep the scrip in the Banks nominee account but to the clients order as each had their own nominees scrip account/portfolio
So in my case it is really a carry over from those days
Also today it doesn't matter in real terms how you register your scrip as SARS can access any information on tax payers irrespective of how registered