Nikolai Storonsky, the billionaire head of the London-based financial technology firm Revolut, has renounced his Russian citizenship in response to Moscow's invasion of Ukraine, the country where his father was born.
International media reported on October 30 that Storonsky, who also holds a British passport, made the decision.
Storonsky, 38, has been a critic of Russia's invasion of Ukraine, saying it was "not just horrifying, it is almost impossible to believe."
"I would like to make clear, publicly, what I've felt privately from day one: War is never the answer," he wrote in a blog post at the start of March, only a few days after Russia initiated the conflict.
"This war is wrong and totally abhorrent. I am horrified and appalled at its impact, and I add my voice to those around the world calling for an immediate end to the fighting, and a commitment to diplomatic solutions. Not one more person should die in this needless conflict," he added.
Despite originally being from Ukraine, Storonsky's father was sanctioned by the Ukrainian government earlier this month over his position as director-general at Gazprom Promgaz, the research arm of Russia's state-owned gas company.
Storonsky is a co-founder and chief executive officer of Revolut, which designs application software for money transfers and related financial services. Bloomberg estimates his worth at $6.7 billion.