Tax reasons. FCA had the same schema (the automaker, now part of Stellantis)

Security reasons. If you own a company today, tomorrow it might belong to someone else. Russian courts are infamously far too flexible to tie any significant property to russian entities.

Is it? Any source that can confirm what you say?

Because I can see lots of Russian entities still based in Russia

Eg: https://en.m.wikipedia.org/wiki/Kaspersky_Lab

Kaspersky has too many ties with the authorities anyway.

Russia is infamous for pressing businessmen to give up their assets. Evgeny Chichvarkin and Mikhail Khodorkovsky are quite interesting examples (check them out on wikipedia).

In Russia we say "the 1st rule of making business in Russia is to not host your business in Russia". Yandex and jetbrains are a good example of this rule! I really doubt that tax evasion was the primary goal of hosting Yandex's HQ in Netherlands

Does Jetbrains have ties with Russia? If so, I see a major blow that Russia could inflict tothe Western world…