https://opencorporates.com/ provides access to data on 200M+ companies in many jurisdictions across the planet
OpenCorporates labels itself as "open data" but the reality is more nuanced:
API keys are available in two ways: free of charge to anyone legitimately working on a project that will contribute back to the open-data community (“share-alike API keys”), and for a fee under our non-share-alike API terms (“non-share-alike API keys”), for example for use in commercial or proprietary applications.
I have not found a link at which the whole database can be downloaded, so it does not qualify as "open data". However, it says:
The OpenCorporates database is licensed under the Open Database License.