 of high-end retailer Saks Fifth Avenue is buying rival Neiman Marcus with an assist from Amazon.com as luxury brands try to navigate slowing demand and rising competition from fast fashion. HBC parent company of Saks Fifth Avenue said in a statement Thursday that it has entered into a definitive agreement to acquire Neiman Marcus, a parent company of Neiman Marcus and Bergdorf Goodman, for a total expense of $2.6 billion.