That depends on the specific details. In publicly trades companies they sell their shares, causing the shares price to drop and the company valuation to drop. This will make it harder for the company to get credit and will lower the value of the owners shares.
Bigger investors can have more direct force, either in voting power or in assigning their own director to the board.
Bigger investors can have more direct force, either in voting power or in assigning their own director to the board.