Saudi Arabia announced its intention to sell 5% of its national oil & gas company Aramco, which has a value estimated by the government of USD 2 trillion. This estimation is equivalent to two thirds of the cumulative market capitalisation of all of the companies listed on the London stock exchange and would price Aramco at more than double the value of Apple. If the sale is carried out, it could represent the heaviest market cap ever, once it reaches approximately USD 100 billion and would also provide an insight into the operational structure of one of the most closed and secretive companies in the world.