Whole Foods Union Certified by US, First for Amazon’s Grocer (1)

A union has been certified at a Whole Foods Market store in Philadelphia, marking a US first for the Amazon.com Inc. grocery chain.

The regional director of the National Labor Relations Board backed the union, overruling objections from Whole Foods, which, like other parts of Amazon, has campaigned against unionization among its staff. The decision tees up a legal battle.

“We strongly disagree with the conclusion and we will appeal,” Whole Foods said in a statement, saying the union “illegally interfered with our team members’ right to a fair vote” at the store.

Employees at the Philadelphia site voted 130 ...