Amazon Faces Escalating EU Antitrust Probe Into Sales Data (2)

Amazon.com Inc. faces a formal antitrust complaint from the European Union, an important step in a long-running investigation that could pave the way for massive fines or changes to the company’s business model.

EU regulators will send Amazon a so-called statement of objections in the coming weeks amid concerns the U.S. retail giant may be shortchanging smaller merchants who sell on its marketplace, according to a person familiar with the case who spoke on condition of anonymity.

The complaint is expected to lay out investigators’ evidence into Amazon’s alleged misuse of merchants’ data on the online sales platform. It will ...