These are private law legal entities created by authorization contained in law to perform public services or economic activities. It is done through authorization by a specific law, with a requirement for registration. Employees are governed by the CLT (Consolidation of Labor Laws) and are subject to the prohibition of remunerated accumulation of positions.
They are immune to taxes when providing public services.
They are subject to public procurement (bidding); for economic activities, bidding is only required for support activities.
If providing a public service, it follows a public law regime; if exercising an economic activity, it follows a hybrid regime, that is, private law partially derogated by public law norms.
Liability is objective when acting as a public service provider.
The corporate form can be any one admitted by Law.
Assets are public.
Capital is entirely public.
Curiosity: During a state of siege, the public company is subject to intervention.
You can access a list of Public Companies (State-owned), see the link:
http://www.planejamento.gov.br/secretarias/upload/Arquivos/dest/090105_ESTA_Univ_ministerio.pdf
