When you would do a CDD on SAKHALIN ENERGY INVESTMENT COMPANY LTD, you will find it is incorporated in Bermuda. The owners seem to be:
Mitsui & Co LTD, Japan - 12.5%
Mitsubishi UFJ Financial Group Inc, Japan - 10%
PJSC Gazprom, Russia - 50%
Government of the Russian Federation - ?
Which leads to a more that 50% ownership by Russian parties. Depending on the sanctions perspective of the country you are interested in (EU, US, UK, Canada; Japan, China, ..., ...), this party may be subject to sanctions. Is it sanctioned... depends on where you are.
When you would do a CDD on Lukoil Asia Pacific Pte. Ltd , you will find it is incorporated in Singapore (there seems to be also an entity with the same name in China?!!, so which one do you mean?). Th owners of the Singapore entity seem to be:
Litasco SA, Switzerland - 100% in turn owned by PJSC Lukoil, Russia.
Which leads to a more that 50% ownership by Russian parties. Depending on the sanctions perspective of the country you are interested in (EU, US, UK, Canada; Japan, China, ..., ...), this party may be subject to sanctions. Is it sanctioned... depends on where you are.
How did I know these structures? I have a subscription to ORBIS of Bureau van Dijk, but any other supplier (e.g. Worldcheck or LexisNexis) would do too.