Believing it to be the company's most important driver of future growth, Seven & i Holdings (SVNDF) (SVNDY) has been expanding its U.S. operations for more than a decade, snapping up various convenience store chains and developing its supply chain in the U.S. For example, in what was one of its largest recent deals, Seven & i acquired 1,108 Sunoco LP gas stations and convenience stores for $3.3 billion in 2017. However, no aversion to massive deal-making, Seven & i recently purchased Marathon Petroleum Corp.'s (MPC) gas station business for a whopping $21 billion