What it does The per curiam opinion upholds the Act’s TikTok-specific designation, its prohibition on providing services to distribute, maintain, or update TikTok in the United States, and its conditional divestiture requirement. The Court treated the provisions as content neutral and applied intermediate scrutiny, concluding that they further the important interest of preventing China from accessing the sensitive data of U.S. TikTok users and are not substantially broader than necessary. A qualified divestiture must end foreign-adversary control and preclude operational relationships involving the recommendation algorithm or data sharing. The Court did not rely on classified evidence.

Who it affects The ruling directly affects TikTok Inc., its parent ByteDance Ltd., U.S. entities providing TikTok distribution, maintenance, or update services, and TikTok’s more than 170 million U.S. users, creators, and petitioners. It leaves the Act’s general framework for other foreign-adversary-controlled applications undisturbed.

Why it matters The decision validates Congress’s use of divestiture or a conditional ban to address national-security risks from foreign control of a widely used communications platform, while emphasizing that the holding is narrow and tied to TikTok’s scale, data collection, and susceptibility to foreign-adversary control.

Key dates and numbers

• January 17, 2025: Opinion issued.
• January 19, 2025: TikTok prohibitions were scheduled to take effect.
• 270 days: Statutory period before prohibitions take effect after designation.
• 90 days: Maximum one-time presidential extension for qualified-divestiture progress.
• More than 170 million: U.S. TikTok users identified in the opinion.