Russia, China and almost the whole of African, Asian and Middle Eastern states are not OECD members. Most South American and Eastern European states are applicants. The corporations could try to sell their stuff and avoid this tax in the Middle Eastern states that are not under sanctions and possibly India and Pakistan. The rest are either under sanctions, export restrictions, too poor or too small to bother with or they'll have a hard time getting their profits out of.

Just speculating, but perhaps share prices would drop until the returns per dollar invested recovers to the desired level. So it might be like a one off shock to investors who hold shares now, since the new equilibrium has shares priced lower to get the same returns as before the tax.