The union win, at a Philadelphia store where workers are seeking higher wages, comes as Amazon is also fighting organizing efforts among some warehouse employees and delivery drivers.

Now, a battle lies ahead when working out the first contract between Whole Foods and the unionized workers. "This is going to be the longest uphill battle of our lives, but this is not just for us. This is for the people who come behind us and for the people who have been here," said Khy Adams, a Whole Foods employee.

Workers at Philadelphia's Center City Whole Foods store voted on Monday to unionize, becoming the first local store in the chain owned by Amazon to formally organize under the United Food and Commercial Workers.

Workers voted 130-100 for union representation at the Center City in Philadelphia, according to the National Labor Relations Board.

Whole Foods said it was "disappointed" by the vote but "committed to maintaining a positive working environment"

Austin-based Whole Foods, which is owned by Amazon, is the latest grocery chain to contend with unionization after workers in Philly voted in favor.

Some 300 workers at an Amazon-owned Whole Foods store in Philadelphia have voted to unionize, mirroring a pro-union shift in public opinion, according to Gallup.

The vote marks the first successful organizing effort at Whole Foods since Amazon acquired the grocer for $13.7 billion in 2017.

Whole Foods workers at the Spring Garden store have expressed frustration about low pay and want better health-care benefits.

Workers at a Whole Foods Market in Pennsylvania voted to unionize on Monday, becoming the first group of employees to pull off a labor win at the Amazon-owned grocery store chain.

The grocery chain’s store in Philadelphia becomes the first to join a union, where workers hope to expand organizing to other outlets and across the Amazon empire.