KEYFACT Energy
The oil and energy sector is represented by eleven entries in this years Sunday Times Rich List.
8. Roman Abramovich: £12.101bn (+£1.945bn)
Roman Abramovich sold a 73% stake in Russian oil firm Sibneft to state-owned Gazprom for $13 billion in 2005.
Abramovich is a significant funder of green technologies such as Velocys PLC, which is working to develop jet fuel from waste in landfills. In 2013 he invested over £4.3 million for a 3% stake in Oxford Catalysts, an AIM-quoted green technology company.
19. John Fredriksen and family: £7.831bn (+£1.206bn)
John Fredriksen is a Norwegian-born Cypriot oil tanker and shipping billionaire businessman, who owns the world's largest oil tanker fleet. He has major interests in the offshore driller Seadrill, the fish farming company Mowi, the dry bulk company Golden Ocean Group, and the supply vessel company Deep Sea Supply.
25. Sir Jim Ratcliffe: £6.33bn (-£5.82bn)
Sir James Arthur Ratcliffe is a Monaco-based British billionaire chemical engineer turned financier and industrialist. Ratcliffe is the chairman and chief executive officer of the Ineos chemicals group, which he founded in 1998 and of which he still owns two-thirds, and which has been estimated to have a turnover of $15 billion in 2019.
34. Alexey Kuzmichev: £5.457bn (New entry)
One of the original founders of LetterOne, Mr Kuzmichev is a member of the Board of Directors of L1 Holdings and L1 Investment Holdings.
In May 2019, L1 Energy and BASF completed the merger of their oil and gas businesses to create Wintershall Dea and now own a 33% stake in the company.
43. Carrie and François Perrodo and family: £3.913bn (+£475m)
Singapore-born Ka Yee (Carrie) Wong Perrodo inherited international oil company Perenco when her husband Hubert Perrodo died in 2006.
Carrie's eldest son, Francois, chairs Perenco while her daughter, Nathalie, oversees the family's winery investments in Bordeaux.
74. Andy Currie: £2.22bn (-£1.88bn)
Andrew Currie has been a director at chemicals giant Ineos since 1999, a year after the company was founded by fellow billionaire James Ratcliffe. Currie derives most of his fortune from his minority stake in Ineos.
75. John Reece: £2.2bn (-£1.9bn)
A chartered accountant, John Reece joined chemicals conglomerate Ineos in 2000, less than two years after the company's founding and derives his fortune from his minority stake in the company.
90. Sir Ian Wood and family: £1.819bn (+£119m)
Sir Ian Wood is best known for his work in the North Sea oil industry with Wood Group, which he was largely responsible for transforming from a company of modest size, serving a primarily local market, to a large corporation with operations in over 50 countries. He served as Wood Group's chief executive from 1967 to 2006, and as chairman until 2012.
98. Mahdi al-Tajir: £1.687bn (+£18m)
Scotland's richest man was named as Mahdi al-Tajir, owner of mineral water firm Highland Spring. He has interests in metal, oil and gas trading and a large property portfolio, as well as running Highland Spring.
188. Peter and Anna Margaret Smedvig and family: £872m (No change)
Anna Margaret Smedvig is a Norwegian-born businesswoman, multi-millionaire and chairman of Smedvig Capital based in the United Kingdom. Anna Margaret is the great-granddaughter of Peder Smedvig who founded Smedvig ASA, an offshore oil rig company, in 1915.
245. Helene and Marianne Odfjell and family: £630m (-£13m)
Helene Odfjell, together with her sister, Marianne, owns Norway's largest drilling and oil service group, Odfjell Drilling, with the subsidiaries Odfjell Rig and Odfjell Offshore. They also own the Bermuda-registered company Odfjell Capital, and through these two companies control, among other things, the rig company Odfjell Invest.