Blue Nile, the successful online jewellery company, has reached an agreement to be purchased by Bain Capital Private Equity and Bow Street LLC. The public company will become private, as the purchasing parties acquire 100 per cent of outstanding shares. The all-cash deal, totaling approximately $500 million U.S., is expected to provide substantial value for stockholders, who will receive $40.75 U.S. per share. This is a 34 per cent increase over Blue Nile’s closing price on November 4, before the acquisition was announced.