Complex sentence: Nationally, Nordstrom competes with luxury retailers Bloomingdales, Lord & Taylor, Neiman Marcus, and Saks Fifth Avenue; of those competitors, Nordstrom has both the largest number of store locations and the largest geographic footprint.
Split into simpler sentences: Nationally, Nordstrom competes with luxury retailers Bloomingdales, Lord & Taylor, Neiman Marcus, and Saks Fifth Avenue. Of those competitors, Nordstrom has both the largest number of store locations and the largest geographic footprint.