Difficult to say whether these were because of Brexit but:
Nissan has doubled down on Sunderland post Brexit
Shell has closed its offices in Netherlands on favour of UK as has Unilever.
https://www.reuters.com/business/energy/iss-recommends-share...
https://www.google.com/amp/s/amp.theguardian.com/business/20...
https://www.google.com/amp/s/www.nytimes.com/2021/07/01/busi...