United States v. Google LLC (2024-2025): The Search Monopoly Case

Case at a Glance

What Is the Google Antitrust Case?

United States v. Google is the most significant antitrust prosecution of a technology company since United States v. Microsoft in 2001. The DOJ, joined by more than 30 state attorneys general, filed suit in October 2020 alleging that Google had violated Section 2 of the Sherman Antitrust Act by illegally maintaining monopoly power in online search and search advertising. On August 5, 2024, Judge Amit Mehta found Google guilty. His 280-page opinion concluded that Google held monopoly power in 2 markets and had maintained that power through anticompetitive exclusionary agreements.

How Google Built Its Monopoly: Default Search Deals

Google did not win its search dominance through better technology alone. It maintained dominance by paying billions of dollars per year to device makers, carriers, and browser developers to guarantee that Google would be the preloaded, default search engine on their products. The most prominent of these deals was with Apple.

Google paid Apple approximately $18 billion in 2021 alone to remain the default search engine in Apple's Safari browser on iPhones, iPads, and Macs. Similar agreements applied to Android phone manufacturers and wireless carriers. Judge Mehta found these were de facto exclusive-dealing agreements: not merely paying for placement but functionally preventing rivals from gaining the scale of query data they needed to improve their own search products and compete effectively.

At the time of trial, Google held approximately 89.2% of all U.S. desktop search queries and nearly 94.9% of smartphone searches. The query data generated by this scale is essential for training and improving AI-powered search ranking systems. By locking up distribution through exclusive contracts, Google denied competitors the data they needed to build competitive products — a self-reinforcing cycle that Judge Mehta found constituted illegal maintenance of monopoly power under Section 2 of the Sherman Act.

The Liability Decision: August 5, 2024

Judge Mehta's August 5, 2024 ruling was unambiguous. Google is a monopolist, he wrote, and it has acted as one to maintain its monopoly. He found the exclusive distribution agreements to be classic exclusionary conduct under federal antitrust law. The ruling did not address what Google should be required to do — that came in a separate remedies proceeding.

The DOJ's Proposed Remedies: November 2024

The DOJ's November 2024 remedy proposal was sweeping. It asked Judge Mehta to:

• Force Google to sell the Chrome browser — the world's most-used browser, accounting for approximately 40% of Google's U.S. search volume
• Force Google to sell the Android operating system (contingent remedy if other measures failed after 5 years)
• Ban Google from making any payments to secure default search placement — an outright prohibition on deals like the Apple arrangement
• Require Google to share its full search index and detailed user interaction data with rival search engines
• Mandate choice screens so users actively select their preferred search engine when setting up devices

The proposal was the most aggressive structural intervention against a technology company in American antitrust history. Google, AI rival Perplexity, and DuckDuckGo founder Gabriel Weinberg all participated in the remedies hearings in April and May 2025.

The Remedies Decision: September 2, 2025

Judge Mehta rejected the DOJ's most sweeping proposals. His September 2025 ruling balanced competition concerns against the disruption that drastic structural remedies would impose and the reality that the search market was already being reshaped by generative AI.

Chrome Divestiture: Rejected

The court declined to order the sale of Chrome. Mehta held the DOJ had overreached. After 2 full trials, he could not find that Google's market dominance was sufficiently attributable to its illegal conduct, rather than superior product and business acumen, to justify divestiture. He also found that separating Chrome from Google's technical infrastructure would be incredibly messy and highly risky.

Exclusive Contracts: Banned

Google is prohibited from entering or maintaining exclusive distribution agreements for Google Search, Chrome, Google Assistant, and Gemini AI. Google may still pay distributors to preload its products — but those deals cannot be exclusive. Under the final December 2025 judgment, any such deal must terminate within 1 year of being entered, preventing Google from locking up distribution channels long-term.

Data Sharing: Ordered

Google must make portions of its search index and aggregated user interaction data available to qualified competitors on commercial terms. The data sharing covers search index data and user click-and-query interaction data — the training fuel rivals need to improve AI-powered search — but specifically excludes advertising data. A Technical Committee of independent experts will determine which companies qualify, oversee data security, and audit use of shared data for 6 years.

AI and Generative Search

Judge Mehta's ruling expressly addressed generative AI. He recognized ChatGPT and tools like Perplexity as disruptive forces representing genuine product competition that may reshape the search market in ways that court orders cannot and should not try to freeze. The remedies are designed to be technology-neutral and cover Gemini alongside Google Search.

The Google Ad Tech Case: A Separate Verdict

A separate DOJ antitrust case targets Google's advertising technology business. Filed in the Eastern District of Virginia, that case alleged Google monopolized the ad tech stack — the systems that connect website publishers with advertisers. A Virginia federal judge found Google guilty in August 2024 on core ad tech monopolization claims. Remedies in that case, which could include structural separation of Google's publisher ad server from its ad exchange, were proceeding separately as of mid-2026.

Is Google Breaking Up? Will Google Be Broken Up?

Will Google be broken up? As of mid-2026, no. Judge Mehta rejected Chrome and Android divestiture in September 2025. Google is subject to behavioral remedies: no exclusive contracts and mandatory data sharing. Google has announced it will appeal the liability ruling. The appeal process is expected to take several years.

The comparison to the 2001 Microsoft antitrust case is instructive. Microsoft was ordered broken up by the trial court, but the D.C. Circuit reversed the breakup order on appeal. The parties ultimately settled with behavioral remedies. Legal analysts expect a similar multi-year appellate process here.

Timeline

United States v. Google is the defining antitrust case of the AI era, a proceeding that found the world's most dominant search company guilty of monopolization and then wrestled with the question of how to restore competition in a market being simultaneously disrupted by the very technology threatening Google's dominance.