(April 13):Grab Holdings Inc, Southeast Asia’s most valuable startup, is going public in the US through a merger with blank-cheque company Altimeter Growth Corp in what is the largest-ever deal of its kind. The Singapore-based startup is set to have a market value of about US$39.6 billion after the combination with the special purpose acquisition company of Brad Gerstner’s Altimeter Capital Management, the firms said in a statement Tuesday. Grab is raising more than US$4 billion from investors including BlackRock Inc, Fidelity International and T. Rowe Price Group Inc as part of the biggest US equity offering by a Southeast Asian company.