Billionaire Yuri Milner-led DST Global is in advanced talks to invest around $400 million in BYJU'S, media reports said. The deal will value BYJU'S at $10.5 billion, making it India's second-most valuable startup after Paytm, and could be signed this weekend. Paytm is currently valued at $16 billion, followed by OYO and BYJU'S at $8 billion, according to Hurun Index.