Judge Leonie Brinkema of the Eastern District of Virginia is expected to rule in the DOJ’s adtech antitrust case against Google sometime in the first half of this year. Trial testimony wrapped in October 2024. Post-trial briefs from both sides have been filed. The ruling is the most consequential pending decision in programmatic advertising, and the period between now and the verdict is the time to understand what the scenarios actually look like.
This is pre-verdict analysis based on the trial record — a read on probability and implications before the judge renders her conclusion.
The Two Counts Most Likely to Succeed
The DOJ’s case comprised multiple counts, but based on the strength of evidence presented at trial, two stand out as most likely to produce a liability finding.
Count 1: Monopolization of the Publisher Ad Server Market
The DOJ’s claim that Google illegally monopolized the market for publisher ad servers rests on a combination of market share (DFP’s estimated 90%+ share of enterprise publisher ad serving) and conduct (the tying of DFP to AdX and the practices that made switching away from DFP financially painful for publishers without changing AdX or Google Ads access).
The market definition issue is contested — Google argued for a broader market definition that would reduce its apparent market share. But the evidence presented — publisher testimony about switching costs, internal Google documents about DFP market position, and economic analysis of the revenue dependency relationship — is strong. A liability finding on publisher ad server monopolization seems probable.
Count 2: Monopolization of the Ad Exchange Market Through Anticompetitive Conduct
The conduct allegations — Project Jedi last look, Project Poirot header bidding throttling, reserve price optimization mechanics — are supported by internal Google documents that are explicit about competitive intent. The DOJ’s expert witnesses presented econometric analysis showing that AdX’s market position was maintained through conduct that wouldn’t have been available to a non-integrated competitor.
Google’s defense on this count — that the practices were technically disclosed, operationally beneficial, and not the actual cause of AdX’s market position — is legally viable but required the judge to credit very favorable interpretations of ambiguous email evidence. The weight of the trial record on this count favors the government.
The Counts More Likely to Produce Mixed Results
The tying claim — that Google illegally tied DFP to AdX — presents a more complex legal analysis because Google argued that the integration delivers genuine efficiency benefits. Tying claims require proving that the bundled product couldn’t have been successful on its merits, which is a harder standard than exclusionary conduct claims.
The advertiser ad network monopolization claim (focusing on Google Ads’ position relative to advertisers buying on open exchange) was always the weaker count in terms of evidence. The trial record on advertiser market competition was less compelling than the publisher market evidence.
What Each Outcome Scenario Means
Scenario A: Partial liability (publisher ad server + exchange, no full tying)
This is the most likely outcome based on the trial record. Google is found liable for monopolization of publisher ad servers and ad exchange markets through specific anticompetitive conduct. The remedy phase begins.
For SSPs: significant competitive opportunity. An exchange market where AdX’s conduct advantages are prohibited produces more level-ground competition for premium publisher inventory. Magnite, PubMatic, and Index Exchange are the immediate beneficiaries.
For publishers: the immediate impact depends on behavioral vs. structural remedies. Conduct prohibitions (no more last look, no reserve price manipulation) improve publishers’ auction mechanics without requiring disruptive infrastructure transitions. Structural remedies (DFP separation) provide greater long-term freedom but significant short-term transition complexity.
For buyers: behavioral remedies improve the integrity of open exchange auctions. Buyers on non-Google DSPs who were disadvantaged by Poirot-type throttling would see more competitive access to inventory. Structural separation of AdX would require buyers to evaluate programmatic inventory access through a changed landscape.
Scenario B: Narrow liability (exchange conduct only, no publisher ad server monopolization)
A narrower finding focused on specific exchange conduct without a publisher ad server monopolization finding produces more limited remedies. Conduct-based prohibitions on specific AdX practices are possible without structural change. This would be a significant legal loss for Google but a more modest market impact.
Scenario C: Full DOJ victory across all major counts
Full liability across publisher ad server monopolization, exchange monopolization, and tying would support the most aggressive structural remedies. DOJ has indicated it would pursue divestiture if full liability is found. This is the scenario that produces the most significant market restructuring — though the appeals timeline would delay any structural changes substantially.
Scenario D: Google prevails
Not impossible, but requires the judge to credit Google’s market definition arguments and characterize the conduct evidence more charitably than the DOJ’s reading. A Google win would have its own market signal — it would confirm that integrated ad stack operation within the existing legal framework is permissible, potentially emboldening further vertical integration in adtech.
The Buyer Strategy Implications
For programmatic buyers, the verdict’s most immediate implication is programmatic diversification strategy. The question isn’t just “what happens to AdX” — it’s “what percentage of my programmatic spend flows through Google-controlled infrastructure, and what are my alternatives?”
Most large advertisers have concentrated programmatic buying in DV360, partly because of its perceived integration advantages with the Google stack. A remedy finding that disrupts AdX/DFP integration changes the value proposition of DV360 relative to independent DSPs like The Trade Desk, Xandr/Microsoft, or Basis.
The Trade Desk, specifically, has been quietly building for this moment. UID2, OpenPath, the retail media network integrations, and the Ventura CTV OS strategy all represent a platform that’s positioning to absorb programmatic infrastructure switching if Google’s stack becomes structurally different.
The Timeline Reality Check
Even the fastest possible remedy timeline — liability finding, no appeal on remedy structure, fast compliance — takes 18-24 months from verdict to operational change. The most likely timeline, including appeals, is four to seven years.
What changes immediately is the competitive context. Publishers that have been evaluating ad server alternatives will have a clearer signal. SSPs that have been building contingency market strategies will know whether their scenarios are live or theoretical. Buyers can make infrastructure decisions with more information about the long-term trajectory.
The verdict is a strategic clarity event even before it produces operational change.
FAQ
Q: When exactly is the verdict expected? Judge Brinkema has not set a specific verdict date. Post-trial briefing completed in late 2024. Based on the complexity of the case and normal federal court timelines for bench trials of this scope, a ruling in the first half of 2025 is reasonable to expect — but could extend into the second half. The judge controls the schedule.
Q: If Google is found liable, can it continue operating AdX and DFP during the appeals process? Yes. During appeals, Google would continue operating all current businesses unless the court issues a specific injunction requiring immediate operational changes. Structural remedies — divestiture — would be stayed pending appeals in all likelihood. The appeals process is the reason market structure changes are years away even from an unfavorable verdict.
Q: How does this case interact with the EU’s Digital Markets Act enforcement against Google advertising? The EU’s DMA proceedings are on a different legal track but share factual territory. DMA enforcement timelines are often faster than US antitrust proceedings. It’s possible that EU DMA remedies in advertising technology precede US adtech remedy implementation, creating a situation where Google’s European advertising operations face different structural requirements than its US operations.
Q: Should programmatic buyers start diversifying away from DV360 in anticipation of the verdict? Proactive diversification is sound competitive practice regardless of the verdict. Having operational DSP alternatives — tested, with proper tracking and attribution verification — provides negotiating leverage with Google and business continuity regardless of market structure changes. Full diversification based on anticipating a specific verdict outcome is premature, but building the capability to diversify quickly is prudent.