 Shares in Altimeter Growth 1 , a special purpose acquisition company operated by Altimeter Capital, rose 19 in premarket trade after the Financial Times said its in talks to merge with Singapore food delivery and payment service Grab. Grab will raise 2.5 billion in total financing, with nearly 1.2 billion coming from Altimeter in the deal that will give Grab a valuation near 35 billion, the report said. 