Blavatnik bought artist Damien Hirst's giant gilded wooly mammoth skeleton entitled "Gone (but) Not Forgotten" for $15 million in 2014.
Blavatnik has been a producer on several Broadway shows including "The Front Page" and "Sunset Boulevard."
Born in Ukraine, raised north of Moscow, Len Blavatnik immigrated to the U.S. in 1978 with his family; he studied computer science at Columbia University and received an MBA from Harvard Business School.
He made an early fortune from Russian oil company TNK-BP, including billions in dividends paid by the joint venture and the sale of his stake in 2013 for $7 billion.
After purchasing Warner Music in 2011 for $3.3 billion, he took the company public in June 2020 at quadruple the value.
His investment firm Access Industries holds stakes in chemicals firm LyondellBasell, energy conglomerate Calpine and house flipping website Opendoor.
Blavatnik says he has given or pledged over $1 billion to philanthropy, mostly to universities, including Oxford, Stanford, Harvard and Yale.