stratasys are probably the largest industrial manufacturer as they make a wider variety of machines than most.

But as far as the actual machine manufacturing goes - an awful lot is done in china - 'cos it's cheaper.

parts might be put together in europe - but the initial manufacturing of components is invariably done in china.
https://www.stratasys.com/

Prusa are an anomaly as they make almost all their plastic components in-house, with their own printers.
That's a pretty large factory and prusa seem to be always playing 'catch-up' between produxtion capability and fulfilling orders.
Pretty much the ideal position for any business :-)

Another large europaen manufacturer are dutch company Ultimaker.
Technically desktop printers but Ultimakers current bias is towards industrial applications and print farms.
All their latest products have been solidly aimed at the industrial fdm market, including new software and multi material 'feeding' station.
I believe most of their products are still made in holland.
BUt don't quote me on that ;-)

https://www.tctmagazine.com/
is probably the best spource for industrial 3d printing.
They pretty much do not cover desktop and 'hobby' machines any more.