What are the main allegations, arguments, potential penalties, requested platform changes, key witnesses, procedural developments, and broader legal context in the landmark 2026 federal trial in which 29 U.S. states accuse Meta of deliberately designing Facebook and Instagram to

As of August 25, the Oakland federal case is still in trial, not decided. It is an unusually consequential state-enforcement case: the judge may impose civil penalties and nationwide product changes, while the jury’s verdict is advisory. 8

Claims and competing arguments

• The 29-state bipartisan coalition alleges Meta deliberately engineered Facebook and Instagram to maximize children’s engagement through addictive design, knowingly contributed to youth mental-health harm, misrepresented safety to parents and the public, and unlawfully collected children’s personal information. The suit includes federal and state child-privacy and consumer-protection theories. 35
• The states’ theory is not merely that social media can be harmful: they say Meta knew of risks, placed growth and “teen time spent” over safety, failed adequately to keep under-13 users off Instagram, and concealed unfavorable internal research. 246
• Meta denies deliberately addicting or endangering children. It contests causation—whether adolescent social-media use itself causes the alleged mental-health injuries—and says the massive penalties proposed are unsupported by the evidence. 58

Stakes and requested changes

• The states seek civil penalties reported by Meta as potentially reaching $1.4 trillion; the states have characterized a figure nearer $200 billion as more realistic. These are claims and estimates, not an award. 510
• They also seek a nationwide injunction requiring age restrictions and removal of infinite scroll, changes that could alter core engagement features of Facebook and Instagram. 7

Key witnesses and evidence

• Arturo Béjar, a former Meta engineering director and whistleblower, has testified that Meta’s culture prioritized growth and engagement over child safety, attributing ultimate authority to CEO Mark Zuckerberg. 14
• Zuckerberg, other executives, and former employees are expected to testify in the roughly six-week proceeding. 14
• The states’ evidence includes internal documents and research; Meta will challenge both their interpretation and the scientific connection between platform use and youth well-being. 23

Procedure and current posture

• The lawsuit was filed in 2023. In June 2026, U.S. District Judge Yvonne Gonzalez Rogers rejected Meta’s attempt to dismiss the states’ central claims, allowing the case to proceed to trial. 12
• Trial began in Oakland on August 18, 2026, led in court by California, Colorado, Kentucky, and New Jersey on behalf of the coalition. 710
• The jury provides an advisory verdict; Judge Gonzalez Rogers ultimately decides the statutory civil penalties and any injunctive relief. 5

Broader legal significance

• The case is a major test of whether state consumer-protection and child-privacy laws can be used to regulate allegedly addictive platform design—not just punish discrete privacy violations. Its outcome could set a template for youth-safety claims against social-media companies and could force national product redesigns. 79
• It arrives amid intensifying litigation over young users and Meta: separately, a New Mexico court recently ordered Meta to pay $567 million in a youth-harm case. That ruling is distinct from the 29-state federal trial and does not determine it. 1