The full 106-page opinion in the US ad tech case against Google was unsealed on Wednesday 16 September, two weeks after Judge Leonie Brinkema refused the Justice Department’s request to force Google to sell its AdX ad exchange. Instead of a break-up, Google faces six years of behavioural remedies overseen by a court-appointed technical monitor.
What the judge decided
The ruling itself came on 2 September in the US District Court in Alexandria, Virginia. The DOJ had asked for AdX to be divested. AdX is the exchange where, as Al Jazeera reported, publishers pay a “20% fee” on ad sales, and it sits at the centre of the case. Judge Brinkema said no to the sale.
With the opinion now public, the detail of what she ordered instead is clear. According to AdExchanger and Quartz, the main points are:
- A technical monitor for six years. The DOJ had asked for 15.
- Prebid integration. Google must connect both AdX and its publisher ad server, DFP, to Prebid, the open-source header bidding framework, with “functionally equivalent” integrations. In practice, rivals that plug into Prebid should be able to compete on similar terms to Google’s own tools.
- Global reach. AdExchanger reports that these requirements apply globally, not only in the United States.
- No forced open-sourcing of DFP. The court rejected the DOJ’s demand that Google open-source DFP’s full auction logic.
Google welcomed the outcome. Lee-Anne Mulholland, speaking for the company, said Google was “very pleased the court rejected the DOJ’s proposal to break apart tools”. Google’s shares rose 0.6% on the day of the ruling.
By the numbers
| Item | Figure | Source |
|---|---|---|
| Date of the remedies ruling | 2 September 2026 | Al Jazeera |
| Length of the unsealed opinion | 106 pages | AdExchanger, Quartz |
| Monitor term ordered | 6 years | AdExchanger, Quartz |
| Monitor term the DOJ asked for | 15 years | AdExchanger, Quartz |
| AdX fee paid by publishers | 20% | Al Jazeera |
| Google share move on 2 September | up 0.6% | Al Jazeera |
| EU fine on Google’s ad tech, September 2025 | EUR 2.95 billion | Al Jazeera, CNBC |
Brussels a year ago, Virginia now
This ruling lands almost exactly a year after the European Commission fined Google EUR 2.95 billion, reported at the time as roughly $3.45 billion, for abusing its dominance in ad tech. The Commission found that Google had favoured AdX through DFP, including by giving AdX advance notice of rival bids, and said the conduct had gone on “since at least 2014”. Teresa Ribera said for the Commission: “Google abused its dominant position in adtech, harming publishers, advertisers, and consumers. This behaviour is illegal under EU antitrust rules.” The Commission also signalled that only a structural break-up would really fix the conflict of interest. Google said it would appeal.
So the two most powerful authorities looking at the same business have now landed in different places. Brussels argued that the conflict of interest is built into the structure. The US court, at least for now, decided that rules, interoperability and a monitor are enough. What caught my attention is that the remedy was chosen by a judge, not negotiated by Google, and yet it spares Google the break-up it had argued against.
Why it matters
For publishers, the Prebid requirement may matter more than the headline about AdX staying put. If Google’s tools have to work on equal terms with an open framework, publishers get more room to let other exchanges compete for their inventory. Whether that changes the 20% fee is an open question, and the court documents in our sources do not answer it.
For the Arab world, the global reach is the key detail. Many Arabic news sites and content publishers sell ads through Google’s tools. If the Prebid requirements apply globally, as AdExchanger reports, then publishers in Cairo, Amman or Riyadh should benefit from the same integrations as publishers in New York. That is my reading, and it depends on how the monitor enforces the order in practice.
What to watch
- How Google implements the “functionally equivalent” Prebid integrations, and how the monitor judges them.
- Whether the DOJ or Google challenge parts of the remedies ruling.
- Google’s appeal of the EU fine, and whether Brussels pushes further toward structural measures.
Sources
- Al Jazeera, report on the US judge rejecting a bid to break up Google’s ad business, 2 September 2026, https://www.aljazeera.com/economy/2026/9/2/us-judge-rejects-bid-to-break-up-googles-ad-business
- AdExchanger, summary of Judge Brinkema’s unsealed remedies decision in the Google ad tech case, 16 September 2026, https://www.adexchanger.com/platforms/the-court-just-unsealed-judge-brinkemas-remedies-decision-in-the-google-ad-tech-antitrust-case-heres-your-tldr/
- Quartz, report on the unsealed Google ad tech remedies ruling, 17 September 2026, https://qz.com/google-ad-tech-remedies-ruling-unsealed-091726
- Al Jazeera, report on the EU fining Google over ad tech practices, 5 September 2025, https://www.aljazeera.com/news/2025/9/5/eu-slaps-3-45-billion-fine-on-google-for-unfair-ad-practices
- CNBC, report on the EU antitrust fine against Google, 5 September 2025, https://www.cnbc.com/2025/09/05/google-slapped-by-eu-with-3point45-billion-antitrust-fine.html
- Loyens & Loeff, case note on the Commission’s EUR 2.95 billion ad tech decision, September 2025, https://www.loyensloeff.com/insights/news–events/news/european-commission-fines-google-eur-2.95-billion-over-abusive-practices-in-online-advertising-technology/