Roman Arkadyevich Abramovich (born 24 October 1966) is a Russian billionaire businessman, investor, and politician.

Abramovich is the primary owner of the private investment company Millhouse LLC, has stakes in steel giant Evraz and Norilsk Nickel. He is best known outside Russia as the owner of Chelsea Football Club, a Premier League football club.

According to Forbes 2016 billionaire list, Abramovich's net worth was $7.6 billion, making him the 13th-richest person in Russia, and the 151st-richest person in the world. The same year, The Sunday Times estimated his net worth at ₤6.40 billion.

The oligarch owns the world's second-largest yacht, 533-foot Eclipse, bought for nearly $400 million in 2010. After oil export deals in the 1990s, he took over oil firm Sibneft with the help of Boris Berezovsky. He sold a 73% stake in Sibneft to state-owned gas titan Gazprom for $13 billion in 2005.