Sir Leonard Blavatnik (Russian: Леонид Валентинович Блаватник, romanized: Leonid Valentinovich Blavatnik; born June 14, 1957) is a Soviet-born British-American businessman and philanthropist. As of April 2025, Forbes estimated his net worth at $26.5 billion, ranking him the 75th-richest person in the world.
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