This dataset is a dump of SCB's registry over Swedish companies. It is downloaded from Bolagsverket's website (SCB file) and converted thanks to this script.
Unfortunately, Bolagsverket and SCB aren't trying to follow open data best practices with this release, they are simply doing the bare minimum to respect the EU's requirements. So they don't disclose under which license they publish this data but the EU requires a license like CC-BY-4.0 at… See the full description on the dataset page:
https://huggingface.co/datasets/PierreMesure/oppna-bolagsdata-scb.