I'd add that the publishers co-president actively denounced the Kremlin on Twitter when the war broke out.
They have also been retweeting support for the refugees and Ukrainian Red Cross. I don't think you'd be doing that without careful consideration at being labelled a traitor by your president and likely not able to set foot there again after being so public in denouncing the actions of the Russian president.
Abramovich did indeed invest in this firm in 2020, that's 100% fact & has a interesting history in his links for sure and was sanctioned as a result by several governments.
Also it is suspected that he poisoned (along with some Ukrainian diplomats) during peace talks so what has changed in his world since then is guesswork at best:
Russian billionaire and Rustem Umerov had symptoms consistent with poisoning earlier in March, says source
www.theguardian.com
The billionaire had sore eyes and peeling skin after attending Ukraine peace talks, sources say.
www.bbc.co.uk
Also I'd not want to tar all Russian's with the same brush. It's not their fault that their leader has, for all purposes, lost his damn mind and has become a stain on this world.
So in short it doesn't mean this publisher is aiding and abetting the terrible crimes in Ukraine, nor should we jump to that conclusion given that publicly they have stated where they stand on this.