The shares would be sold during the proposed mega public offer of the NSE.
IFCI has offered to offload 25 per cent of its 3.05 per cent stake in the exchange, that is 3,43,188 equity shares (pre-split) through IPO of NSE, the company said in a regulatory filing to stock exchanges.
NSE yesterday filed draft papers with market regulator Sebi for its much-awaited IPO, expected to be one of the biggest in recent times with an estimated size of over Rs 10,000 crore.
Of the total shares on offer, around 15.8 per cent stake would be tendered by foreign shareholders, and 6.7 per cent by domestic entities.
The offer may give the exchange a valuation of Rs 50,000-55,000 crore, sources said, adding that the IPO itself could be worth about Rs 10,000 crore.