Backed by Microsoft Corp. Chief Executive Officer Satya Nadella, the firm is seeking to raise between $650 million and$800 million at a valuation of up to $8 billion, the people said, asking not to be identified as the information is private.If the valuation holds, Groww would become The deal size could revised if the market regulator approves lowering the minimum public float for large listings, one of the people said. Current rules require at least 10%, but the proposal would let companies with a post-I ...