Private prisons are very rare in the US. The majority of them are run by individual states or by the federal government. Where I have read that private prisons

Private prisons are very rare in the US. The majority of them are run by individual states or by the federal government. Where I have read that private prisons are on the rise, however, is in the UK itself, and in New Zealand and (to a lesser extent) Australia, run by companies like Serco and G4S.