(Corrects subscription order for shares in paragraph 4 to 5.9 bln, not 6.3 bln, after bank clarification):
RIYADH (Reuters) - The institutional tranche of Saudi Aramco’s planned initial public offering (IPO) has been almost three times oversubscribed, receiving orders worth 189.04 billion riyals ($50.4 billion), financial advisers for the IPO said on Tuesday. The bookbuilding process for allocating shares to institutional buyers - typically asset managers, insurers or pension funds - began on Nov. 17 and investors have until 1700 Saudi time on Dec. 4 to place orders.