Although SoftBank still owns 90% of the equity, they’re now back to being public and since their headquarters is still Cambridge, I’d still call them a UK company.
In general, I think ARM just was famously started in the UK and so they’ll always be associated with the country in some intangible way.
It is sort of funny that we label companies like this, really they are all multi-national entities. Especially in the case of a company like ARM—they license out the designs to be (sometimes quite significantly!) customized by engineers in other countries, and I’m sure they integrate lots of feedback from those partners. Then those designs are often actually fabricated in a third country!
Which is good, the world is best when we all need each other.
