Shareholders own big business. Lots of people. No idea of names. However, this is how it works
America is the only nation that allows the individual funding of politicians. Civilised countries banned this over a hundred years ago. It’s corrupt.
Example: the gun industry and the NRA own enough politicians in both parties to veto legislation they don’t like.
The only difference between America and civilised nations is that they have a licensing requirement for gun ownership. If you have a criminal record you won’t get one. If you have mental health issues you won’t get one. Result? You’re over fifty times more likely to die from a bullet in America.