I don’t have time to look it up, but his wealth is also listed as net worth, not income, so I suspect that might be a private company, which would explain why we haven’t heard as much about him.

Edit: I have time now and yes, it’s privately owned.

Edit 2: but maybe it’s about to be merged into a public company? I’m not sure, this is pretty nebulous, possibly because it hasn’t been finalized yet.