The U.K. and U.S. governments sanctioned Wednesday several “financial fixers” of sanctioned Russian oligarchs, including Roman Abramovich and Alisher Usmanov, whose efforts to launder hundreds of millions of dollars have been intensely scrutinized since Russia launched its full-scale invasion of Ukraine last February.

Credit Suisse loaned hundreds of millions of dollars to Abramovich’s offshore companies, which used U.S. stocks as collateral, two new leaks reveal. The secretly-owned firms loaned each other massive sums that were mysteriously returned or written off, in what experts said could be a scheme to obscure the origin of the funds.

Canada stands poised to seize US$26 million in assets from Russian oligarch Roman Abramovich and distribute the funds towards reconstruction efforts in Ukraine, the country’s Minister of Foreign Affairs Mélanie Joly said Monday.

Lawyers for Russian oligarch Roman Abramovich argue he should not be sanctioned because his ties to the Kremlin are weak, but new documents reveal he secretly had a years-long partnership with the Russian government in a forestry venture.

A U.S. court has authorized law enforcement to seize two planes belonging to sanctioned Russian oligarch Roman Abramovich, the U.S. Department of Justice (DOJ) said in astatement on Monday. However, none of the aircraft are currently in the country.

About two weeks before Russia’s invasion of Ukraine, Portugal thwarted Roman Abramovich’s intention to sell a lavish mansion in the south of the country worth nearly US$10,5 million.

Russian oligarch Roman Abramovich has hit headlines since Russia invaded Ukraine. Billions of his assets have been frozen by a court in Jersey. French authorities have seized a US$120 million mansion he owns on the Riviera coast. And the fate of his U.K. Premier League football club, Chelsea, has been front-page news around the world.

The U.K. government announced Thursday that it has frozen 10 billion pounds (US$13 billion) in assets held by two Russian oligarchs, both known to be longstanding business partners of Chelsea Football Club owner Roman Abramovich.

A court order from the island of Jersey froze on Tuesday US$7 billion in assets belonging to Russian oligarch and Chelsea FC owner Roman Abramovich, in a move that sanctions nearly all of the billionaire's reported wealth.

With Russian oligarchs in the global spotlight and U.K. authorities holding his two executive jets, sanctioned billionaire Eugene Shvidler may be tempted to hide out in one of his US$15-million flats in central London, which have remained secret from the public until now.

A luxurious estate on the French Riviera, Sardinian villas, mansions in London and Paris, and a billion-dollar offshore trust –– these are some of the more than two dozen assets that Russian oligarchs have managed to keep secret until now.

Following sanctions the US Treasury imposedin April against Russian Oligarch Oleg Deripaska, authorities have frozen his Upper East Side mansion, occupied by the ex-wife of his business partner Roman Abramovich,the New York Post reported Monday.