Amazon.com Inc. didn’t violate federal labor law when it informed employees of already-announced benefits during an anti-union meeting, the National Labor Relations Board said in a ruling that dismissed remaining allegations in a long-standing dispute against the e-commerce giant.

The three-member panel on Thursday unanimously upheld a January 2023 decision from Administrative Law Judge Benjamin Green, who found that Amazon’s changes to the company’s benefits program, announced in September 2021, wouldn’t have dissuaded employees from unionizing.

The case stems from the Amazon Labor Union’s attempts to organize two Staten Island, N.Y., facilities in 2021.

“As the judge observed, record evidence …