Apple
How much? $18.04bn
When reported? 27 January 2015
Why? Bumper sales of iPhone 6 and growing demand from China
Gazprom
How much? $16.24bn
When? 30 August 2011
Why? Increased gas sales both inside and outside the country and higher commodity prices.
ExxonMobil
How much? $15.9bn
When? 26 July 2012
Why? Rising oil prices and profits from disposals
Royal Dutch Shell
How much? $15.68bn
When? 30 June 2008
Why? Benefits from oil hitting a record high of $147 a barrel
Apple
How much? $13.10bn
When? 27 January 2014
Why? Record quarterly sales of iPhones and iPads