I would check out the Ukrainian Oligarchs link at the top.
You can follow links to each one.
Some lean more towards Russia, some EU, some both.
American business (organized into the USUBC) figures in huge as well.
John Deer, Coca-Cola, Walmart, the list goes on...
From 8 companies in 2005 to over 200 now.
I’m sure EU companies are pushing in there as well.
Kraft has been selling products through a Ukraine subsidiary for almost 20 years.
You don’t need to have the EU agreement signed to do business there, the business has been going on all along.
The big oligarch’s company SCM employs 200,000 employees.
Big money.
The west tends to be more Euro, East more Russian.