Google Escapes Breakup, but Will Face New Rules

After years of litigation and two antitrust lawsuits filed by the U.S. Department of Justice, Google has managed to keep its digital advertising empire intact. Federal Judge Leonie M. Brinkema of the Eastern District of Virginia ruled this week that the company does not need to sell its advertising operation. Instead, it will be required to adjust its business practices to favor competition.

The outcome may seem like a victory for the big tech company, and that is exactly how the company is publicly treating the case. However, the decision carries deeper implications for the online advertising ecosystem and the future of technology regulation in the United States.

Two Cases, One Pattern: Monopoly Without Structural Punishment

The U.S. government filed two separate actions against Google. The first, in 2020, focused on the company's dominance in search. The second, in 2023, specifically targeted the advertising technology business. In both cases, the courts concluded that Google exercised monopoly power illegally.

In 2024, a court determined that the search operation and the associated ads constituted an illegal monopoly. The Department of Justice even suggested that Google sell the Chrome browser and the Android operating system. Judge Amit Mehta rejected this proposal in September 2025, allowing the company to keep both products. However, he ordered Google to end exclusive contracts for default positions on devices and to share search data with competitors.

Now, the second case followed the same script. Judge Brinkema acknowledged the illegal behavior but opted for operational remedies rather than structural ones. Practically speaking, Google retains all its pieces on the board; it just needs to move some differently.

What Changes in Practice for the Advertising Market

The decision does not yet provide specific details on what changes Google will have to implement. The full ruling will remain confidential for 14 days, during which the parties can make necessary edits. This means the market still operates in the dark regarding the real scope of the new rules.

The online advertising ecosystem is notoriously opaque. Google dominates nearly the entire chain: from the tool that publishers use to sell ad space to the system that advertisers use to buy that space, including the platform that connects both sides. This vertical integration was precisely the focus of the government's accusation.

To contextualize the scale: Google's advertising revenue exceeded $237 billion in 2024, according to data from Alphabet. It is a business that represents more than 75% of the company's total revenue. Any adjustment to the rules of the game, even if it does not involve a breakup, has the potential to redistribute billions in the ads market. As we have analyzed in articles about the regulatory impact on big techs, this type of decision tends to reverberate throughout the sector.

Why U.S. Justice Avoids Breakup

The pattern that emerges from the two cases is revealing. Courts are willing to declare monopolies illegal but hesitate when it comes to dismantling companies. This happens for practical and political reasons.

On the practical side, separating integrated operations like Google's would create enormous technical challenges and could harm small advertisers who rely on the simplicity of a unified ecosystem. Google's own defense explored this argument: Lee-Anne Mulholland, the company's vice president of regulatory affairs, stated that the decision protects "tools that help small businesses reach new customers."

On the political side, the Trump administration historically signaled ambiguous positions on big tech regulation. Although proceedings were initiated in previous administrations, the willingness to execute aggressive remedies such as breakups seems limited. The prevailing trend is to impose behavioral changes rather than structural ones, something we have already observed in other cases involving large technology companies.

Exclusive Contracts at the Center of the Problem

One point connecting the two proceedings is Google's strategy of entering into exclusive agreements with device manufacturers and telecom operators. These contracts ensured that Google was the default search engine on billions of mobile phones worldwide. In exchange, operators received a share of the advertising revenue.

This model created a virtuous cycle for Google and a vicious one for its competitors. More devices with Google as the default meant more search data, which fed better ads, which generated more revenue, which financed even larger exclusive contracts. Judge Mehta's decision in 2025 already addressed this point by prohibiting exclusive default position agreements. Brinkema's ruling is expected to follow the same direction, although the details remain confidential.

It is worth noting that Google is appealing the determinations from the first case. The final outcome may take years, meaning that concrete changes in the digital advertising market are still, for now, more promise than reality.

What This Means for Investors and the Sector

For those following the technology sector, the message is clear: the risk of Google's breakup is off the table, at least in the short term. Alphabet's shares are likely to respond positively to this reduction in regulatory uncertainty.

However, the scenario is not entirely comfortable for the company. When operational changes are detailed, they may open the door for competitors like The Trade Desk, Microsoft, and Amazon to gain market share in ads. Smaller ad-tech companies may also benefit if Google is forced to open parts of its infrastructure.

For the Brazilian market, where Google accounts for over 90% of searches according to StatCounter data, the impact may be indirect but significant. Changes in data and exclusivity policies in the U.S. tend to be replicated globally. As we have explored in analyses of the impact of international regulations on emerging markets, decisions made in American courts often reshape the competitive landscape worldwide.

In summary: Google maintained its structure but lost the narrative that there is no problem. Two distinct courts have declared that the company acted illegally. What remains to be seen is whether the imposed remedies will have sharp enough teeth to change the dynamics of a $600 billion annual market.