The iconic but struggling US department store Macy's announced plans on Tuesday to close almost a third of its eponymous locations by 2026 while building up its upscale Bloomingdale's and Bluemercury brands.The company said 15 Bloomingdale's nameplate stores and at least 30 new Bluemercury stores would open in new and existing markets over the next three years, along with 30 remodeled Bluemercury sites.