But many of them are allowed to spend a fortune on living expenses, The New York Times reported.
One tycoon had permission to pay 19 members of staff, including private chefs, the report said.
Last year, officials granted at least 82 exemptions — known as licenses — to oligarchs who were affected by UK sanctions imposed as a result of Russia's invasion of Ukraine, the report said.
A big chunk of that money went into a security company that has been under investigation for likely helping Aven evade sanctions, The Times reported, citing court records.
A spokesperson for the UK Treasury told The Times that licenses to allow payments for "basic needs" are "strictly monitored."
Persons:
Mikhail Fridman, Fridman, Pavel Golovkin, Petr Aven, Vladimir Putin, Aven, Oleg Tinkov, Putin
Organizations:
New York Times, Service, The Times, EU, Bloomberg, Treasury, Times, Alfa
Locations:
Wall, Silicon, Ukraine, London, British, Russian, Moscow, Russia