[2] Each country's company register has different registrar types, contents, purpose, and public availability.
They typically contain the name, the owners and key personal of an organisation as well as regular updates as mandated by the government of that jurisdiction, to provide information to stakeholders and the general public.
Information has to be maintained by the organization that is registered through regular filings which are typically done when changes occur and at least annually.
According to ratings published in 2016 by the website OpenCorporates, Denmark and United Kingdom are the leaders with regard to openness of information available in a company's register.
[3] Registries/registrars in these countries are named, correspondingly, Central Business Register and Companies House.