According to the AKO:
Stores that have absolutely no chametz issues: Aldi, BJs, Costco, CVS, Duane Reade, Rite Aid, Sams Club, Trader Joes, Walgreens, Walmart, Wawa, Whole Foods.
Owned by Yidden, but business is sold for Pesach: Stop and Shop, Winn Dixie, Key Food.
Target is a potential issue because of the distributors. It's difficult to know.
Amazon is ok if sold by Amazon itself.