Yes, Buffett controls Moody’s with 20% for example.
There are options they can exercise that can give them much more in a flash.
When a company is going down the tubes, a cash injection is needed to stop bankruptcy. An investor can step up but only on condition they have complete control at a minimum stake. Other stakeholders agree because otherwise their investment goes to zero.
Slim injected cash to get a megaphone that his people can use according to his will.
Thanks Hostage.