I started to write a list ... but easier to google!
* https://www.weforum.org/agenda/2017/10/meet-europe-top-tech-...
* https://en.wikipedia.org/wiki/List_of_largest_European_compa...
I actually hadn't realised Spotify was Swedish! Deezer is French.
Pretty much every high-end car manufacturer.
ARM.
Did you know the modern three-point tractor hitch was invented by an Irishman? Modern motor cars come from Germany. The Web as I mentioned earlier comes from CERN which is a joint European project.
Ericsson, Siemens, Philips.
Airbus is also another joint European cooperative.
Raspberry Pi.
Arduino.
Betfair.
Jetbrains.
Interesting exercise!