The merger is another example of the big getting bigger to better contend with online growth and mega-chains such as Wal-Mart and Walgreens Boots Alliance. Albertsons Cos. and Rite Aid noted that the combined company will be ranked first or second in 66 percent of the top U.S. metropolitan areas and first or second in 70 percent of U.S. pharmacy locations. Other advantages will be leveraging loyalty programs and data, combining private label brands and expanding omnichannel opportunities.