You can always find out who owns shares based off the annual...

You can always find out who owns shares based off the annual report. Following is the data from the 2021 Annual Report, as at 28 Sep 2021 - Note it is not 30 June 2021.

The top twenty is based of the registered name in share register. It isn't always the actual beneficial owner of the shares as many shares are registered behind nominees. For example, if you look at the top four known beneficial owners (the 2nd table) you only see one of those entities in the top twenty holders. The 2nd table comes from the notices given to the company/ASX.