British online retailer Asos will acquire Topshop and its sister brands Topman, Miss Selfridge and HIIT from parent company Arcadia Group for more than $400 million, in yet another sign of the rapid expansion of e-commerce as pandemic shutdowns continue to weaken brick-and-mortar retail. The London-based e-commerce site will buy $41 million of inventory from Arcadia’s brands, but won’t...