Mr. Zuckerberg went to court on Monday in a trial focused on his social media company’s acquisitions of Instagram and WhatsApp. The case could reshape Meta’s business.

Meta boss Mark Zuckerberg has taken the witness stand in a landmark antitrust trial to defend his company against allegations that his company operates a social media monopoly. His testimony is part of a case first brought by the Federal Trade Commission (FTC) in 2020 during the final days of the first Trump administration.

Meta CEO Mark Zuckerberg took the witness stand Monday to defend his company against accusations by the Federal Trade Commission that it bought competing social media companies to dominate the market with a monopoly.