Google faces an unprecedented multi-front antitrust assault that creates the primary tail risk for the Search business. In the DOJ search monopoly case, Judge Mehta ruled Google an illegal monopolist but imposed relatively mild behavioral remedies: banning exclusive default deals, requiring choice screens, and mandating data sharing -- while rejecting Chrome divestiture.
The DOJ appealed in February 2026. Separately, the ad tech case found Google liable for monopolizing ad servers and exchanges, with potential AdX divestiture pending. The EU fined Google $3.45B for ad tech abuse and is pursuing DMA enforcement with penalties up to 10% of global turnover ($40-80B). Despite this regulatory barrage, the market de-risked Google: stock jumped 8% on the Mehta ruling, and behavioral remedies have historically had minimal share impact (<3% from EU choice screens).
Key open question
What is the combined annual cost of antitrust compliance, legal expenses, and fines?
What is the combined annual cost of antitrust compliance, legal expenses, and fines?
Judge Mehta ruled in August 2024 that Google holds an illegal monopoly in online search, then issued remedies in September 2025 that were far milder than the DOJ sought. The court banned exclusive default search engine contracts but allowed Google to retain Chrome and Android, and permitted non-exclusive payments for search placement.
A 6-year monitoring period with a Technical Committee was established. The DOJ and state coalition appealed in February 2026, arguing the behavioral remedies are insufficient -- the D.C. Circuit decision is expected by late 2026. Google's stock jumped 8% on the Mehta ruling, reflecting market relief that structural remedies were avoided. The appeal creates ongoing uncertainty but the probability of Chrome divestiture on appeal is considered low.
Chrome divestiture was the most severe structural remedy proposed by the DOJ but was rejected by Judge Mehta as 'incredibly messy and highly risky.' Chrome drives an estimated 35% of Google Search revenue per Barclays, making divestiture a potential 15-25% stock decline and ~30% EPS hit. The DOJ's February 2026 appeal seeks stronger remedies, keeping this tail risk alive.
However, the D.C. Circuit would need to overturn the trial court's factual findings, which appellate courts rarely do. The market has largely de-risked Chrome divestiture: Google's stock jumped 8% on the Mehta ruling. Even without divestiture, the ban on exclusive defaults and mandatory choice screens could gradually erode Chrome's role as a search traffic funnel.
Google pays Apple approximately $20B/year for default search placement in Safari, making it the single largest component of Google's ~$60B annual traffic acquisition costs. Judge Mehta's remedies effectively end exclusive default deals, but Google can still pay Apple for non-exclusive placement.
The practical impact may be muted: users overwhelmingly choose Google even when presented with choice screens (EU precedent showed <3% share impact). However, Apple could leverage the new structure to negotiate higher payments from multiple search providers or develop its own AI-powered search. The TAC ratio has been improving -- TAC grew 12% vs advertising revenue growth of 13.5% in Q4 2025 -- as Google shifts ad revenue mix toward owned properties (now 90% of ad revenue).