美国最大的连锁supermarket应该是

Kroger. 它有20多个不同品牌的supermarket: kroger, ralphs, smiths, baker's, Fry's, food4less, Foods Co, City Market, King Soopers, QFC, Hilander, Owen's, Gerbes, Payless, Pillows.等等

http://www.thekrogerco.com/
就算不是最大估计也是前几名了.