A federal judge in Virginia has handed Google a partial victory in one of the Justice Department’s highest-stakes monopolization cases, declining to order the company to divest its ad-tech business while imposing a series of conduct remedies designed to reshape how the company operates in the digital advertising market. The decision, issued on September 6, 2026, by Judge Leonie Brinkema of the U.S. District Court for the Eastern District of Virginia, represents a pivotal moment in the government’s long-running campaign to rein in Google’s dominance across multiple layers of the online advertising ecosystem.
The ruling arrives after a protracted legal battle that placed Google’s ad-technology stack under an unforgiving judicial microscope. The Justice Department had argued that Google unlawfully maintained monopolies in several ad-tech markets by tying together its publisher ad server, advertiser ad network, and ad exchange in ways that foreclosed competition and inflated costs for publishers and advertisers alike. The government’s proposed remedy was structural: force Google to sell off key pieces of its ad-tech infrastructure, effectively breaking up the vertically integrated machine that processes the majority of the programmatic advertising transactions on the open web.
Judge Brinkema rejected that approach. Her opinion, while finding that Google engaged in anticompetitive conduct, concluded that a forced divestiture was not the appropriate remedy given the specific facts of the case and the state of the relevant markets. Instead, she ordered a set of behavioral remedies that prohibit Google from engaging in the specific practices identified as unlawful and impose ongoing compliance obligations designed to prevent recurrence.
The Justice Department’s Theory of Harm in the Google Ad-Tech Case
The DOJ’s case, formally United States v. Google LLC, centered on the company’s control over the three primary technological layers that facilitate programmatic advertising: the sell-side publisher ad server (Google Ad Manager, formerly DoubleClick for Publishers), the buy-side advertiser ad network (Google Ads, formerly AdWords), and the exchange that connects buyers and sellers (AdX). The government alleged that Google used its dominance in each layer to favor its own products, restrict interoperability with rival platforms, and extract supra-competitive rents from both publishers and advertisers.
At the heart of the government’s theory was a claim of self-preferencing. Google, the DOJ argued, designed its ad exchange to give its own advertiser network preferential access to ad inventory, while simultaneously using its publisher ad server to disadvantage rival exchanges. The result, according to the government, was a closed loop in which Google controlled the flow of transactions, captured an outsize share of the economic value, and made it nearly impossible for competing ad-tech providers to gain meaningful traction.
The case attracted enormous attention because it struck at the economic engine of the open web. Programmatic advertising funds the vast majority of independent digital publishers, from local newspapers to specialized trade publications. If Google indeed wielded monopoly power in ad tech, the argument went, the entire publishing ecosystem was being systematically squeezed.
Why the Judge Rejected Divestiture as a Remedy
Judge Brinkema’s decision to eschew a structural remedy was grounded in several findings. First, she determined that the markets at issue were rapidly evolving and that a forced divestiture risked creating inefficiencies that could harm the very publishers and advertisers the DOJ sought to protect. Second, she expressed concern that breaking up Google’s ad-tech stack could inadvertently strengthen other dominant players in adjacent markets, particularly Amazon and Meta, without necessarily restoring competitive conditions.
Third, and perhaps most significantly, the judge found that the DOJ had not established a clear causal link between Google’s specific anticompetitive conduct and the structural conditions that a divestiture would purportedly remedy. In other words, while Google had indeed broken the law in certain respects, the government had not proven that selling off AdX or Google Ad Manager would fix the underlying competitive dynamics. This is a high bar in antitrust litigation: remedies must be reasonably tailored to the proven violation, and courts are generally reluctant to impose sweeping structural relief when less intrusive measures might suffice.
The judge also noted that Google had already taken steps to address some of the concerns raised during the trial, including changes to its ad-server policies and increased transparency around auction mechanics. While these changes did not immunize Google from liability, they informed the remedy analysis by demonstrating that conduct-based relief could be effective.
The Conduct Remedies Imposed on Google
The remedies ordered by Judge Brinkema are specific, operational, and designed to inject competition into the ad-tech ecosystem without requiring a corporate breakup. While the full text of the remedy order is detailed and technical, several key provisions stand out for their potential impact on how Google conducts its ad-technology business.
Interoperability and Data Access Requirements
Google is now required to provide rival ad exchanges with equal access to the demand signals flowing through its publisher ad server. Previously, the DOJ alleged, Google structured its ad server to give AdX preferential treatment — for example, by allowing AdX to participate in auction dynamics that were not available to competing exchanges. The remedy order mandates that Google offer functionally equivalent access to all qualified exchanges, effectively leveling the playing field in the auction process.
Additionally, Google must grant publishers greater control over their own data. The order requires Google to provide publishers with portable, machine-readable logs of bid-level data, enabling them to analyze auction outcomes and potentially redirect inventory to higher-performing channels. This data-access remedy is aimed at reducing the information asymmetry that the court found gave Google an unfair advantage in optimizing its own ad products at the expense of rivals.
Prohibition on Self-Preferencing in Auction Design
A central pillar of the remedy package is a prohibition on Google designing its ad exchange or publisher ad server in ways that favor its own advertiser network. The judge specifically enjoined Google from using non-public information about rival bids to inform the bidding strategy of Google Ads. This practice, sometimes referred to as “projected winning bid” or “bid shading” with informational advantages, was a key focus of the trial.
Going forward, Google must maintain a separation between its exchange and its advertiser network operations sufficient to prevent the flow of competitively sensitive information. The order does not require full functional separation or a corporate wall, but it imposes detailed firewalls and auditing requirements to ensure compliance.
Transparency and Reporting Obligations
The remedy order also mandates significant new transparency measures. Google must publish detailed reports on auction mechanics, fee structures, and the performance of its ad-tech products relative to competitors. These reports are designed to give the market — and potential competitors — the information needed to make informed decisions about which ad-tech products to use. The DOJ and the court will have access to raw data for monitoring purposes, and the order includes provisions for independent third-party oversight.
Pricing and Contractual Restrictions
Judge Brinkema imposed restrictions on Google’s ability to bundle its ad-tech products or condition access to one product on the use of another. Google is prohibited from tying its publisher ad server to its ad exchange or from offering discounts that effectively lock publishers into its full stack. The order also limits Google’s ability to use long-term exclusive contracts that the court found had foreclosed rivals from competing for publisher and advertiser relationships.
Historical and Legal Context: Google’s Antitrust Battles
This case is only one front in a broader antitrust assault on Google that spans multiple jurisdictions and theories of harm. In the United States, the DOJ has brought two major cases against Google. The first, filed in October 2020, focused on Google’s monopoly in general search and search advertising. That case, which went to trial in 2023, resulted in a landmark ruling by Judge Amit Mehta in August 2024 that found Google had unlawfully maintained a monopoly in search through exclusive distribution agreements with Apple, Mozilla, and Android device manufacturers. The remedy phase in that case is ongoing, with the DOJ proposing remedies that could include structural separation of the Chrome browser and limits on Google’s search distribution deals.
The ad-tech case decided by Judge Brinkema represents the second major DOJ action. It was filed in January 2023 in the Eastern District of Virginia, a venue known for its relatively fast-moving docket. The case proceeded to trial in September 2024, with closing arguments in November 2024. The nearly two-year gap between trial and remedy decision reflects the complexity of the issues and the court’s careful consideration of the appropriate relief.
Outside the United States, the European Commission has also pursued Google over its ad-tech practices. In June 2023, the Commission issued a Statement of Objections alleging that Google distorted competition in the ad-tech market by favoring its own exchange. That investigation remains ongoing and could result in significant fines and behavioral remedies in Europe, potentially aligning with or exceeding the scope of Judge Brinkema’s order.
What This Means for the Digital Advertising Market
The practical implications of Judge Brinkema’s ruling are significant, even without a divestiture. For publishers, the interoperability and data-access remedies could translate into higher revenues if they enable publishers to more effectively route inventory to the highest bidder without Google’s thumb on the scale. The transparency requirements may also give publishers greater leverage in negotiations with Google and with rival ad-tech providers.
For advertisers, the restrictions on self-preferencing and data misuse could lead to more efficient markets in which bids are evaluated on their merits rather than on informational asymmetries. However, the order does not directly address pricing, and Google will retain considerable market power in both the buy side and sell side of the ecosystem. Advertisers should not expect dramatic reductions in fees overnight, but the structural changes to auction dynamics could gradually shift the balance of power.
Competing ad-tech platforms — including Amazon’s Publisher Services, Xandr (owned by Microsoft), PubMatic, Magnite, and The Trade Desk — stand to benefit from the leveling of the competitive playing field. The interoperability mandates may make it easier for these platforms to integrate with Google’s publisher ad server, which remains by far the dominant sell-side platform in the market. Over time, this could erode Google’s market share and create a more heterogeneous ad-tech landscape.
Yet the decision also creates uncertainty. The conduct remedies require ongoing monitoring and enforcement, and Google is likely to challenge the scope of certain provisions. The company has already signaled that it may appeal the liability finding as well as the remedy order. An appeal could take years to resolve, prolonging the period of legal uncertainty for market participants.
Reactions and Strategic Implications
The DOJ, while disappointed that a structural remedy was not ordered, has publicly characterized the conduct remedies as a meaningful victory that will restore competition in a market long distorted by Google’s unlawful conduct. In a statement following the ruling, the department emphasized that the behavioral remedies address the specific anticompetitive practices identified at trial and that the ongoing monitoring provisions will ensure compliance.
Google, for its part, has framed the decision as a validation of its position that a forced divestiture was unwarranted. The company argued throughout the litigation that its ad-tech products delivered significant value to publishers and advertisers and that any competitive issues could be addressed through targeted changes rather than a breakup. The remedy order, while burdensome, is far less disruptive than the divestiture the DOJ sought.
Industry observers have noted that the decision may shape the DOJ’s approach in other pending antitrust cases, including the ongoing remedy proceedings in the search monopolization case. If the Virginia court’s skepticism toward structural remedies influences Judge Mehta, the DOJ may need to refine its arguments about why conduct remedies are insufficient in the search context. Conversely, the DOJ may use the ad-tech case to argue that conduct remedies are only effective when combined with the threat of structural relief — a message that could resonate in the search remedy hearings.
What the Ruling Means for the Future of Antitrust Enforcement in Tech
Judge Brinkema’s decision arrives at a moment of intense debate about the appropriate remedies for antitrust violations in digital markets. The traditional antitrust toolkit, developed in an era of industrial manufacturing and retail distribution, does not always map neatly onto platform markets characterized by network effects, multi-sidedness, and rapid technological change. The question of whether behavioral remedies can effectively restore competition in such markets is one of the central policy questions of the current era.
This ruling suggests that courts are not yet ready to embrace structural breakups as a default remedy for digital platform monopolies, even when anticompetitive conduct is proven. The evidentiary burden required to justify divestiture remains high, and judges may be more comfortable imposing conduct remedies that can be calibrated and adjusted over time. For companies across the technology sector, the message is clear: even without a breakup, the cost of antitrust liability can be substantial in the form of operational restrictions, transparency mandates, and ongoing oversight.
The order also highlights the growing importance of state-level antitrust enforcement. A coalition of state attorneys general joined the DOJ’s ad-tech case, and several states have pursued their own investigations into Google’s advertising practices. The coordination between federal and state enforcers in this case may serve as a model for future multi-jurisdictional antitrust actions.
For publishers, advertisers, and ad-tech executives, the immediate task is parsing the remedy order in detail and adjusting their commercial strategies accordingly. The interoperability and data-access provisions are likely to be the most consequential in the near term, as they directly affect the mechanics of programmatic auctions. Companies that invest in building the technical capabilities to take advantage of these new requirements stand to gain a competitive edge.
The broader lesson of this ruling is that antitrust enforcement in digital markets is entering a more mature phase, in which the question is no longer whether dominant platforms can be held accountable for anticompetitive conduct, but rather what form that accountability should take. The ad-tech remedy order will be studied, litigated, and debated for years to come, and its influence will extend far beyond the specific markets it directly regulates. As the digital advertising ecosystem continues to evolve, the boundaries set by Judge Brinkema will shape the competitive dynamics of the open web for the foreseeable future.
