If you start to get upset over stocks from mega corporations being brought and sold, that's when you will truly get insane
Boycotting is the only thing you can do if you don't want to support the shareholders. Or you can buy their stocks instead, if you have the money
I don't really care about them owning 5%. I'm just worried that this is just the beggining and that they are planning to buy a bigger controlling share in the future.
Your worries will eventually become a reality. Better starting to accept it