Saudi Aramco has reportedly tasked two U.S. industry leaders in oil reserves auditing to review the content of its deposits as it pushes ahead with a share listing next year; Gaffney, Cline and Associates, and DeGolyer and MacNaughton. Another industry source said that Aramco is in talks with a company to audit its reserves and another one to audit its finances. Last year, Prince Mohammed said he expected the IPO would value Aramco at a minimum of USD2tr. Sources reported that up to 5% of the stake size is begin considered for the offer, and that could be raised depending on oil prices and market reaction to the listing. (Reuters)