US-based fund house Valic, which holds around 4,502 shares in Flipkart, and Vanguard World Fund, which has four lakh shares, have pegged the valuation of the e-commerce company between USD 15 billion and USD 19 billion. Flipkart was last valued at about USD 12.5 billion when it raised USD 2.5 billion from Masayoshi Son's SoftBank last year.