Dilbar, the World’s Largest Motor Yacht, Is Owned by Russian Billionaire Alisher Usmanov TOPICS:Fashion Posted By: Advance December 9, 2021 In our search to find the world’s biggest and most extravagant yachts around, we’ve ended up in Russia. Yes, Russia. In the hands of Alisher Usmanov sits what is considered “the largest motor yacht in the world by gross tonnage,” the Dilbar.