This is my question. The post states “I received a call that all options had vested so I need to exercise them, so I did”.

Ok? So the author should have those shares to his name?

Clearly he sold them early, and would have sold these extra ones too if he'd exercised them. It's just weird that he's trying to hide the fact by failing to mention it and ignoring questions about it.

It's OK, dude. We've all been there. You're in good company with Masayoshi Son on this one.

Yeah I noticed the author is replying to a lot of questions except the question of what happened to the shares that were exercised

Or the author doesn’t want anyone reading along on the internet to realize that he’s a multi-billionaire.

Which of the possibilities is more likely is anyone’s guess.

So someone who was previously unknown brought all this attention on themselves while being a coy billionaire? We live in strange times so it's possible but doubtful.

Yep. He is trying to stir up public opinion after his legal options petered out.

Admitting the status of his original shares is not a good look either way. Either he sold, and the additional shares aren't technically worth $1B because he'd have sold them too. Otherwise he held, and is another unsatisfied greedy billionaire in the world.