IndiGo IPO size cut by over Rs 200 crore: Low-cost carrier IndiGo's operator InterGlobe Aviation has lowered its IPO size by over Rs 200 crore to nearly Rs 3,000 crore with one promoter deciding to sell less number of shares in the public offer. The promoters of the IndiGo, which is among the few profitable airlines in the country, will now sell nearly 23 million shares, down from about 26.1 million they had earlier proposed for the Offer For Sale component of the IPO.