Meta Platforms, the parent company of Facebook and Instagram, is no stranger to immense wealth. Last year, it reported nearly $201 billion in revenue, and as of June, it held more than $90 billion in cash and marketable securities. Yet a federal trial now underway in Oakland, California, is probing whether even that financial fortress can be breached. The case, brought by a coalition of 29 state attorneys general and led initially by California, Colorado, Kentucky, and New Jersey, accuses Meta of deceiving the public about the dangers its platforms pose to young users, particularly through features designed to keep children and teenagers hooked on Instagram and Facebook.

The states are pursuing claims that private plaintiffs cannot, including violations of the Children's Online Privacy Protection Act (COPPA). They also seek remedies that could address harms affecting millions of people. Eric Goldman, co-director of Santa Clara University School of Law's High Tech Law Institute, told Fortune that the stakes are uniquely high because damage awards may measure harm across vast populations. That explains the staggering figure hanging over the trial: $1.4 trillion—the maximum penalty Meta claims could accrue under the states' legal theory. That number approaches the company's own market value. "It's a number that boggles the mind, frankly," Goldman said. He added that at its most extreme, such damages could effectively transfer stockholder value to the public. "Essentially, it's asking Meta to turn in the keys and walk away."

Reaching that $1.4 trillion figure is a long shot. The eight-person jury in this bellwether trial is advisory, leaving U.S. District Judge Yvonne Gonzalez Rogers to make the final decisions on liability and remedies. James Grimmelmann, a professor of digital and information law at Cornell University, told Fortune he does not expect a penalty that would bankrupt Meta. "The jury is purely advisory, so whatever it concludes won't be binding on the court, and even if it comes in with an extremely high number, the judge could revise it and so could other courts on appeal," he said.

A recent case in New Mexico offers a glimpse of potential financial impact. A jury there found Meta liable for 75,000 violations of the state's consumer protection law, leading to $375 million in civil penalties. A judge later deemed Meta's platforms a public nuisance and ordered an additional $567 million to address youth mental-health harms, bringing the total to $942 million. Meta is appealing that decision.

But the Oakland trial goes beyond monetary penalties. Meta spokesperson Stephanie Otway stated in an email to Fortune that the states "have not shown anyone in their states was misled or harmed by the features at issue" and that the attorneys general are trying to penalize the company for "industry-wide challenges like age verification." Otway added, "Rather than sticking to the facts or the law, the states have instead decided to chase an outlandish payout. We stand by our record of creating strong protections for teens."

Meta points out that less than 1% of its revenue comes from teens on Instagram. However, Goldman emphasized that the share of direct revenue does not address the central question: how much harm is Meta causing in society? With millions of young people still using the platforms, potential liability is not limited by that revenue stream.

Money is only one dimension of the risk. The attorneys general are challenging the very design choices Meta makes—how content is presented and how algorithms prioritize engagement. This distinction is crucial because Section 230 of the Communications Decency Act generally protects internet companies from liability for user-generated content. The states argue they are not suing over what users post, but over Meta's own decisions about content presentation. Goldman disagrees with that separation, calling it "illusory" and noting that editorial functions and content are inseparable in his view. However, Judge Rogers disagreed with Goldman, allowing the case to proceed to trial. Goldman also raised First Amendment concerns, comparing Meta's content presentation choices to a newspaper's editorial decisions, which are protected speech.

Regardless of the outcome, the trial's implications extend far beyond Meta. TikTok, YouTube, and Snapchat face similar lawsuits over youth harm. A victory for the states could provide a legal playbook for challenging the design of other social media platforms—and potentially even generative AI, video games, and social gaming. As Goldman put it, "The internet is on trial in Oakland right now, because it's not just Meta and it's not just social media."