Amazon Offers Marketplace Rule Change to Ease UK Concern (1)

Amazon.com Inc. has agreed to change the way it deals with rivals’ sales data and to treat all sellers equally on its UK platform after an investigation by the country’s antitrust agency.

The Competition and Markets Authority said Wednesday that Amazon offered a number of promises to change the way it treats third-party sellers on its UK marketplace. The move comes after the technology company offered a similar truce to European regulators in December.

The watchdog opened the probe last year after it raised a number of concerns including how it used user data to give the platform an unfair ...