Meta, the parent company of Facebook, faces a pivotal antitrust trial beginning Monday in Washington DC that could fundamentally reshape the social media landscape [1][2].

The Federal Trade Commission (FTC) will argue that Meta's acquisitions of Instagram (2012) and WhatsApp (2014) illegally suppressed competition in the personal social networking market. The trial is expected to last two months and feature testimony from high-profile witnesses including CEO Mark Zuckerberg and former COO Sheryl Sandberg [3].

At stake are Meta's most valuable assets. Instagram now generates over half of Meta's US ad revenue and WhatsApp brings in $10 billion annually from business messaging [2]. The FTC is seeking remedies that could include forcing Meta to divest these platforms [1].

The case hinges on several key elements. The FTC must prove Meta holds monopoly power in a relevant market, with their definition specifically excluding platforms like LinkedIn, YouTube and TikTok. Evidence includes a 2012 message from Zuckerberg noting that Instagram could be 'very disruptive' to Facebook if it grew larger [2].

Meta's defense will likely focus on challenging the FTC's market definition while highlighting the company's role in growing Instagram from 30 million users to billions, and WhatsApp from 450 million users to becoming the world's most used messaging app [2][3].

The political context has evolved since the case's inception. Originally filed under the first Trump administration and pursued by the Biden administration, the case now continues under President Trump's second term with new FTC chair Andrew Ferguson [1]. Despite Zuckerberg's recent overtures to the Trump administration, Ferguson has indicated the trial will proceed [3].

This represents the third major US antitrust trial targeting Big Tech in two years, following successful action against Google's search operations. Legal experts consider this 'one of the stronger tech cases brought in the last five years,' according to Vanderbilt Law School antitrust professor Rebecca Haw Allensworth [2].