Rue21 said Apax, which already owns a 30 percent stake in the company, will pay $42.00 per share in cash, representing a premium of 23 percent to its Wednesday close.

Shares of the company were up 23.2 percent before the bell, indicating that investors may be expecting a higher bid.

The retailer, which has a market capitalization of about $810 million, said it has set up a special committee of independent directors to solicit and evaluate higher bids during a 40-day go-shop period.

The special committee is being advised by Perella Weinberg Partners, as financial adviser, and Kirkland & Ellis LLP and Potter Anderson & Corroon LLP, as legal advisers.

Apax was advised by J.P. Morgan Securities LLC. Simpson Thacher & Bartlett LLP and Richards, Layton and Finger, P.A. acted as legal advisers.

(Reporting by Siddharth Cavale in Bangalore; Editing by Roshni Menon)