@dr just because he owns a lot of shares doesnt mean he has a lot of say over the company, even if he did want to affect policy it would only be achievable through slow secondary processes he wont be able to just go into twitter and start firing janitors and telling management how to do their job, he will just be able to have a weighty vote on members of the board of directors and what those directors do with that gained position is again secondary effects, they can make some suggestions but its not going to magically change the culture of the company.
Option 3: he’s just some guy with a lot of money who made an investment