Wal-Mart Stores, Inc. is getting a makeover. Its new name: Walmart.

When drug company chief executive Heather Bresch was hauled in front of Congress last year to defend the high price of lifesaving EpiPens, she drew skeptical lawmakers’ attention to a large poster board that blamed the skyrocketing price tag on a coterie of drug supply chain middlemen. Of EpiPen’s $608 list price, her company, Mylan, received only $274, Bresch said.

Blame it on the weather, retailers say.