A Closed Deal, Reopened
Meta completed its acquisition of Manus, the AI agent startup built by Butterfly Effect, on December 29, 2025, for a reported $2 billion-plus. The deal was not quietly waved through: China's Ministry of Commerce said within days it would assess the transaction against export-control and technology-transfer rules, and by April 27, 2026, the Office of the Working Mechanism for Foreign Investment Security Review — housed at the National Development and Reform Commission (NDRC) — issued a formal order prohibiting the acquisition and requiring the parties to "withdraw from the transaction" (NDRC decision notice). On August 11, Manus confirmed in a blog post that it would "resume operating as an independent company," completing the unwind roughly eight months after the deal closed (Silicon Republic).
That sequencing is the story. This was not a merger blocked mid-negotiation. It was a completed, integrated acquisition — Manus staff, technology and product roadmap had already been folded into Meta's agentic AI push — that Beijing ordered reversed four months after signing. A new ownership group led by Tencent, which absorbed the stake previously held by Benchmark, bought the company back for the same $2 billion, alongside ZhenFund and HSG (Caixin Global).
The Legal Mechanism
The order rests on the Measures for the Security Review of Foreign Investment, jointly issued by the NDRC and Ministry of Commerce and effective January 18, 2021 — China's answer to CFIUS (NDRC framework notice). The Measures set a tiered clock: 15 working days for an initial screen, a 30-working-day general review, and a special review that can stretch to roughly 150 calendar days. Manus is the first publicly disclosed case in which the mechanism has been used to block — and unwind — an AI-sector deal since the rules took effect. Legal analysts who reviewed the order note the NDRC applied a "substance over form" test, looking past Manus's Singapore holding structure to where the underlying technology was developed, where its engineers built their expertise, and how the IP moved offshore (SCMP).
Steelman: Why Beijing Says This Matters
The strongest version of Beijing's case is not paranoid. Manus builds autonomous agents that independently execute multi-step tasks — a capability regulators in most capitals now treat as dual-use and strategically sensitive, the same instinct behind Washington's own CFIUS blocks and forced divestitures of foreign-owned platforms. A founder relocating a China-built engineering team and its IP to a Singapore shell before selling to a US buyer is, from Beijing's vantage point, a corporate-form workaround for a substantive transfer of capability out of Chinese jurisdiction — exactly the kind of restructuring security-review regimes exist to look through. On that logic, treating the deal's foreign incorporation as dispositive rather than its origin would let any Chinese-founded AI company exit the country's regulatory reach by re-domiciling first and selling second.
The Innovation Cost
But ordering the reversal of a deal four months after it closed is a different and far costlier instrument than blocking one before signing. Manus's engineers, product integrations and users had already been absorbed into Meta's infrastructure; unwinding that means severing live products, and Manus has now told users that data generated after the December 29 acquisition date will be deleted unless backed up by August 23, a real cost borne by ordinary customers who had nothing to do with the ownership dispute (SCMP). A pre-closing review that blocks a problematic deal preserves certainty for everyone else in the market; a post-closing reversal signals that no China-linked AI acquisition is ever truly final, regardless of how much diligence, restructuring or time has passed. That raises the effective cost of capital for the entire sector, not just the transactions Beijing actually objects to.
The Manus case is being read across the AI M&A bar as a template, not an outlier: NDRC's willingness to reach through an offshore holding structure means every foreign acquirer of a China-founded AI startup now has to price in retroactive-unwind risk, years after signing.
It's also worth noting what "independence" actually produced: not a diffusion of ownership, but a transfer to Tencent, a large, Beijing-aligned domestic platform now sitting as Manus's largest shareholder. Annual recurring revenue reportedly quadrupled from about $100 million to $400 million between the acquisition and the unwind (Caixin Global) — a business that grew under foreign ownership is being reassigned to domestic control, which reads less like a national-security remedy and more like industrial policy exercised through a security-review statute.
What Cross-Border AI M&A Looks Like Now
For foreign acquirers, the lesson isn't "don't buy Chinese-founded AI startups" — it's that offshore restructuring no longer buys legal certainty, and closing a deal doesn't start a limitations clock. A narrower, faster ex-ante review — with published sector thresholds and firm deadlines, closer to how CFIUS is supposed to operate before signing — would let Beijing screen the transactions it actually considers a threat without leaving every other completed AI transaction retroactively contestable. Proportionate security review and an open market for AI capital aren't in tension; a review regime that can reopen closed deals on a discretionary timeline is.