Who Controls Social Media? Meta, TikTok and X Face a New Era of Regulatory Pressure

For years, the answer to "who controls social media?" was simple: the companies that run it. That answer is getting harder to defend. In the space of a few weeks this autumn, a British court sided with a regulator against Meta, TikTok and X, Washington moved to back X against the European Union, and Australia advanced new rules on platform design. Control is now being contested in courtrooms and regulators' offices on three continents.

Europe moves from rules to enforcement

The European Union's Digital Services Act has been in force for large platforms since 2023, but the first real penalties came only recently. On December 5, 2025, the European Commission fined X €120 million, its first non-compliance fine under the law. The Commission found breaches of three transparency obligations, including the design of X's paid "blue check" and its advertising repository, according to Reuters and other reporting. TikTok avoided a penalty in a separate case by promising changes to its ad library.

Other cases are open. On October 24, 2025, the Commission preliminarily found that Meta and TikTok had failed to give researchers adequate access to public data, and that Meta's Facebook and Instagram made it needlessly hard for users to report illegal content and to challenge moderation decisions. If those findings are upheld, fines can reach 6 percent of worldwide annual turnover. On February 6, 2026, the Commission also preliminarily found that TikTok's addictive design breaches the DSA.

X faces further scrutiny. On January 26, 2026, the Commission opened a formal investigation into whether X properly assessed and mitigated risks before deploying its Grok AI tool in the EU, and extended an earlier probe into its recommendation systems. The Grok inquiry followed reports that the tool generated large numbers of sexually explicit images, including non-consensual deepfakes.

Brussels is also preparing new law. A Digital Fairness Act, expected as a proposal between October and December 2026, is aimed at addictive design, dark patterns and influencer marketing to children, according to a policy summary.

Britain's court ruling

Britain's version of the pressure arrived on October 30, 2026. The High Court rejected challenges by Meta, TikTok and X to information notices that the regulator Ofcom issued in February under the Online Safety Act. The notices demand detailed data on how the companies moderate content. Reuters reported that the judges said the companies had not sufficiently explained why the notices would be onerous, and rejected the argument that they were irrational.

The companies had argued the demands were unprecedented. One report said X called its notice the most demanding data request it has faced from any regulator anywhere. Ofcom can fine companies up to 10 percent of global turnover for the most serious breaches. Meta is also fighting Ofcom over how WhatsApp is categorised under the law, and was reported to have become the subject of a formal Ofcom investigation earlier this month.

Australia targets design and age

Australia has taken a more direct route. Its ban on social media accounts for under-16s took effect on December 10, 2025. In September 2026, the government published a draft "Digital Duty of Care" that would require platforms to design products safely by default, and it has moved to nearly double maximum penalties for breaching the ban to almost A$110 million. Officials acknowledged that data showed under-16 use of some platforms rising despite the ban, so enforcement remains a live problem.

Washington pushes back

The pressure is not all one way. On September 24, 2026, the U.S. Department of Justice asked the EU's General Court for permission to intervene on the side of X and Elon Musk, who are seeking to annul the €120 million fine. According to a summary of the filing, the U.S. argues that the Commission's approach raises questions about territorial jurisdiction and about how it defines a "provider" liable under the law, and that its scrutiny reached Musk personally and unrelated American entities.

This echoes earlier criticism. After the fine, U.S. Vice President JD Vance wrote that the EU "should be supporting free speech, not attacking American companies over nonsense," and the Commission has replied that it is not trying to impose the highest fines but to make sure the law is enforced. The cases are the first to reach the General Court over how the DSA is applied.

What regulators are really targeting

Look across these cases and a few themes repeat:

• Transparency and data access. Regulators want independent researchers to see how platforms work, and want clearer user tools for reporting content.
• Design, not just content. Addictive design and dark patterns are being treated as regulatory issues, not just matters of taste.
• Children. Age limits and duty-of-care rules are central in Australia and increasingly in Europe.
• AI features. Grok shows that when a platform adds generative AI, it can trigger new risk assessments.

How the companies are responding

The three platforms are not reacting the same way. X has fought hardest in public: Elon Musk dismissed the EU fine and framed it as an attack on free speech, and the company is challenging the decision in court, although X has also proposed remedial measures to the Commission on some of the issues raised. TikTok has leaned toward settlement. It offered concessions on its ad library to avoid a fine, and urged regulators to apply the law equally and consistently across all platforms. Meta has argued its case in the UK courts, where it is challenging Ofcom on several fronts at once.

What it means for users and advertisers

For ordinary users, the visible changes so far are modest: clearer reporting tools, more transparency about advertising, and in Australia, age limits. Larger shifts, such as changes to recommendation feeds or design features, depend on investigations that have not concluded.

For advertisers and brands, the main effect is uncertainty. Penalties of up to 6 percent of global turnover in the EU and 10 percent in the UK are large enough to influence product decisions, but nothing in the sources reviewed shows a platform changing its core business model because of them. Whether regulation changes how much time people spend on these services, or how they are monetised, is something the evidence does not yet show.

What is unsettled

Several things remain open. Fines in the EU's cases against Meta and TikTok are still preliminary findings, not decisions. X's challenge to its fine will take time in the courts. And enforcement outside Europe, as Australia's experience shows, is hard.

There is also a genuine disagreement about principle. Regulators describe their work as enforcing transparency and safety rules. Critics, including the U.S. government in this dispute, describe parts of it as overreach that could chill speech and burden American companies. This article does not take a side, and the courts have not yet resolved those arguments.

The takeaway

The honest answer to who controls social media is: no single party does. Platform owners still set most product decisions. But regulators in Brussels, London and Canberra now have enforcement powers, fines are real, and at least one court has sided with a regulator over the platforms. The next test is whether those powers survive legal challenge and political pressure from Washington.