Amazon.com Inc. employees in Alabama voted not to unionize, according to a Wall Street Journal tally, handing the tech giant a victory in its biggest battle yet against labor-organizing efforts that fueled national debate over working conditions at one of the nation’s largest employers.

With about 80% of ballots counted, some 71% of the Bessemer, Ala., warehouse workers voted against joining the Retail, Wholesale and Department Store Union, according to the Journal’s vote tally.

The National Labor Relations Board has finished counting all votes that weren’t challenged by either side, and the number of votes against a union exceeds 1,608, the total needed to reach a majority of the 3,215 mail-in ballots workers submitted. The NLRB hasn’t declared an official winner.

Shares of Amazon rose more than 1% to the highest level since mid-February.

The Bessemer facility employs fewer than 1% of the roughly 950,000 Amazon employees in the U.S., but the vote emerged as a watershed moment for a company that hired faster than almost any private corporation in history last year.