Björgólfur Thor Björgólfsson (born 19 March 1967 in Reykjavík, Iceland), known internationally as Thor Bjorgolfsson, and colloquially in Iceland as Bjöggi, is an Icelandic businessman and entrepreneur, and former chairman of the financial firm Straumur-Burðarás and chairman of investment firm Novator Partners.
As of June 2019, he is the richest person in Iceland and 1,115th richest person in the world according to Forbes.
His most valuable holding today through Novator Partners is a share in Polish telecom outfit Play and he has also invested in smaller startups such as the Zwift online platform for indoor cycling as well as the Icelandic MMOG company CCP Games.Björgólfur was the first Icelander to join Forbes magazine's list of the world's richest people in 2005; has been declared "Iceland's first billionaire"; and was ranked as the 249th-richest person in the world by Forbes magazine in 2007—up from 350th the previous year—with a net worth of $3.5 billion.
In 2007 the Sunday Times’ Sunday Times Rich List put his net worth at £2,000 million.
However, following the financial crisis of 2007–2010, Björgólfur's net worth had declined to $1 billion by March 2009.
He worked out a complex deal with his creditors to pay off his debts while holding on to his key investments and on March 20, 2017 Forbes estimated his net worth at $1.81 billion.