The IPO is expected to be the largest public issue in the country at an estimated size of USD 3.8 billion. The shares of the company is likely to get listed on the bourses on October 28, at an enterprise valuation of USD 143-146 billion or above Rs 12 lakh crore

The purchases were made within the limits permitted under the Securities and Exchange Board of India's (Sebi's) creeping acquisition regulations, which allow promoters to gradually increase ownership without triggering a mandatory open offer, subject to prescribed thresholds