In September 2026, a US federal court ordered Google to dismantle the specific ad auction practices that its earlier ruling had identified as instruments of an illegal monopoly. First Look, Last Look and Unified Pricing Rules are gone. But the court declined to force a sale of Google's ad exchange, so Google remains in control of both the buying and selling sides of the market, now under six years of court supervision.
Nothing changes overnight. What the ruling sets is a six-year trajectory toward a more competitive programmatic advertising market.
📌 The short version:
- No breakup. Google keeps its AdX exchange and its publisher ad server.
- Behavioural remedies instead: no First Look or Last Look advantages, Unified Pricing Rules deprecated, and AdX bids opened to rival publisher ad servers.
- Six years of oversight by an independent monitor, and the remedies reportedly apply worldwide, not only in the US.
- It concerns open-web display advertising. Google Search ads and YouTube are not part of this case.
What Did the Court Decide?
US District Judge Leonie Brinkema had already found, in April 2025, that Google illegally monopolised two markets: publisher ad servers and ad exchanges for open-web display advertising. The remedies decision followed on 2 September 2026, with the full written opinion unsealed in mid-September.
The Department of Justice and the states had asked for structural remedies, chiefly a forced sale of AdX and the open-sourcing of the auction logic in Google's publisher ad server. The court rejected both. Instead it accepted most of the behavioural remedies proposed by the parties, as modified by the court, and concluded they would be enough to reopen the affected markets and stop Google reverting to the conduct it had been found liable for.
First Look, Last Look and Unified Pricing Rules, in Plain English
These three practices are the heart of the case, and they are easier to understand than the names suggest:
- First Look let Google's exchange see and buy a publisher's ad impression before rival exchanges had a chance to bid.
- Last Look let Google's exchange see the highest rival bid and then adjust its own to win, often by the smallest possible margin.
- Unified Pricing Rules stopped publishers using Google's ad server from setting a higher minimum price for Google's exchange than for its competitors.
Together they meant Google's exchange did not have to win on price. It could win on position. Google had already stopped using First Look and Last Look and removed Unified Pricing Rules in late 2025 under antitrust pressure. The ruling turns those voluntary changes into court-enforced obligations, and adds new ones: making real-time AdX bids available to competing publisher ad servers, so they see the same bid data Google's own server sees.
Six Years of Oversight, Applied Worldwide
The remedies run for six years, the term Google proposed, rather than the fifteen sought by the government. An independent monitor, paid for by Google, oversees compliance and reports to the court, which can extend the period.
The detail that matters most for Australian businesses: according to reports of the unsealed opinion, the court rejected Google's argument that the remedies should be limited to the United States. Google's ad tech serves Australian publishers and advertisers through the same systems, so the changes flow through here too.
🇦🇺 The Australian context: none of this will surprise anyone who read the ACCC's 2021 digital advertising services inquiry, which raised concerns about Google's position across the ad tech supply chain and the lack of transparency in how fees and auctions work. A US court has now imposed the kind of auction-level changes that inquiry pointed toward. Either side can still appeal, so treat the timeline as indicative.
What This Ruling Does Not Touch
It is easy to over-read this. The case concerned open-web display advertising: the systems that sell ad space on third-party websites and apps. It does not change how Google Search ads work, how YouTube ads are sold, or how Google sells inventory on its own properties. Search advertising was the subject of a separate case.
If your budget is mostly Google Search and Performance Max, this ruling changes very little for you in the near term. If you run meaningful display or programmatic spend, it is worth paying attention.
What Changes for Advertisers
The principle the industry has taken from the ruling is straightforward: budgets should flow toward whichever inventory and technology best delivers your objectives, rather than toward whichever exchange has structural advantages. In practice, over the next 12 to 18 months, that is likely to mean:
- Independent exchanges and demand-side platforms becoming more competitive as Google's structural advantages are unwound.
- More transparency about which bids won and lost, and why, as bid data is shared beyond Google's own systems.
- Potentially better pricing, because impressions are more likely to go to the highest genuine bid rather than to the best-positioned exchange.
What Changes for Publishers and Content Sites
If you monetise a website with display advertising, more demand competing fairly for each impression should give you more control over how your inventory is sold. You can set different price floors for different buyers again, and rival ad servers can access Google's demand without you being locked into Google's tools to get it. Google's exchange has historically taken around a 20% cut of each transaction, so better competition there has real money attached.
What to Do Now
Nothing here is urgent. These are the sensible moves over the next two quarters:
- Know where your display budget runs. Pull placement reports and check what share of spend lands on sites you would actually choose.
- Ask for fee transparency. If you buy programmatic through an agency or platform, ask what proportion of each dollar reaches the publisher.
- Measure incrementality, not cheap CPMs. A more open market will produce lower prices on some inventory. Cheaper impressions are only better if they drive results, so make sure your conversion tracking can tell the difference.
- Revisit display in your 2027 planning. If you are already moving Display campaigns, our guide to migrating Display to Demand Gen covers Google's side of the change, and our remarketing guide covers where display usually earns its keep for smaller businesses.
The Bottom Line
Google was not broken up, but the auction mechanics that gave its exchange an edge are now off the table, under supervision, for six years and reportedly worldwide. For most Australian small businesses running mostly search ads, nothing changes this quarter. For businesses with real display or programmatic spend, and for anyone monetising a website with ads, the market should become more competitive and more transparent from here. The businesses that benefit will be the ones measuring return on spend carefully enough to notice when a better option appears. Our paid advertising and analytics teams can help you get there.
Sources: United States v. Google LLC (E.D. Va.), remedies decision of 2 September 2026 and unsealed memorandum opinion (September 2026); Reuters coverage via PYMNTS (September 2026); The Next Web, "Judge's full ruling puts Google's ad tech business under a monitor for six years" (September 2026); Tech Policy Press analysis of the remedies opinion (September 2026); PubMatic CEO commentary on the ruling (September 2026); ACCC, Digital advertising services inquiry final report (2021).
