Employees of a flagship Whole Foods Market in Philadelphia voted to become the first unionized store in the Amazon-owned grocery chain's history.

United Food and Commercial Workers Local 1776 announced the victory in an X post on Monday night: "Workers at Amazon’s Whole Foods in Philadelphia made history today as they voted to unionize and WON!"

The National Labor Relations Board emailed USA TODAY on Tuesday to confirm that "Region 4-Philadelphia conducted a ballot count today for 297 full-time and part-time employees at Whole Foods in Philadelphia, PA, to vote on union representation by UFCW Local 1176 Keystone State."

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According to the board, workers voted 130 to 100 for union representation. Now that the vote has passed, the board said Whole Foods, the employer, "must begin bargaining in good faith with the union."

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The board said both parties have five business days to file objections to the election. If none are filed, the result will be certified.

Whole Foods Market 'disappointed by the outcome'

In a statement emailed to USA TODAY on Tuesday, Whole Foods Market said the company is "disappointed by the outcome of this election."

"We are committed to maintaining a positive working environment in our Philly Center City store," the company's statement continued.

The grocery chain's statement also noted that “Whole Foods Market is proud to offer competitive compensation, great benefits, and career advancement opportunities to all Team Members."