Google will not be forced to sell its ad exchange. On September 2, 2026, U.S. District Judge Leonie Brinkema rejected the Justice Department’s breakup request and ordered rule changes instead. If you run Search ads, nothing changes. If you run Display, Performance Max or Demand Gen, the auction behind some placements will be rewired over the next year.
What did the judge actually decide on September 2?
The court kept Google’s ad tech business intact but ordered it to change how its ad exchange runs auctions.
Some background. In April 2025, Judge Brinkema of the U.S. District Court for the Eastern District of Virginia ruled that Google had illegally monopolized two markets: the software publishers use to manage their ad space (the publisher ad server, DFP) and the marketplace where that space is auctioned (the ad exchange, AdX). According to PPC Land’s September 3 report on the ruling, the court found Google held roughly 91% of the publisher ad server market.
The Justice Department wanted Google to sell AdX. Google offered behavioural fixes instead. On September 2, the judge sided mostly with Google on the structure and mostly with the DOJ on the rules. Search Engine Land reported the same day that she "upheld monopoly findings but imposed behavioral remedies rather than forced Google Ad Exchange divestment."
AdExchanger’s coverage adds the judge’s reasoning: a forced sale would trigger years of appeals, and small publishers who use Google’s ad server for free could be hurt.
Google’s statement, quoted by Search Engine Roundtable on September 3: "We’re very pleased the Court rejected the DOJ’s proposal to break apart tools that help small businesses reach new customers and grow."
What changes inside Google’s ad auction?
Four practices that gave Google’s own exchange an edge are being removed, and Google will be watched for six years.
Per PPC Land’s breakdown of the order, AdX must share real-time bid data with rival ad servers; Google’s Unified Pricing Rules are deprecated, so publishers can set different price floors for different bidders; and the "first look" and "last look" advantages, which let AdX see or beat competing bids before the auction closed, are prohibited on open-web display inventory. The behavioural remedies must be in force within one year, with court monitoring for six years.
Why does this marketplace matter to you? Because it is where a lot of your Display money ends up. PPC Land cites trial evidence that Google Ads accounts for about 30% of all programmatic impressions, and that roughly 90% of Google Ads demand flows exclusively through AdX. Reuters, quoted by Search Engine Roundtable, notes publishers pay Google a 20% fee on AdX.
Does this affect my Search campaigns?
No. This case is about display advertising on other people’s websites, not about the ads that appear on Google.com.
Google Search ads run in a separate auction that was not part of this case. If your account is Search-only, with call and form tracking feeding Smart Bidding, this ruling has zero effect on your cost per click or cost per lead. That describes most of the small-business accounts we run. Matrix Realty, a GTA brokerage on a roughly $1,000 monthly Search budget, went from 14 to 23 leads a month between May and August 2026 at a cost per lead that improved from $53.95 to $46.22 as the search-term data matured. None of that traffic touches AdX. You can read the details in the Matrix Realty case study.
A separate Google change is far more relevant to Search advertisers this month. Search Engine Land reported on August 14 that Google began automatically migrating campaign-level Broad Match and legacy Automatically Created Assets to AI Max between September 1 and 30, 2026, with Dynamic Search Ads following in February 2027. We covered what to check in our AI Max auto-upgrade guide.
Does it affect Performance Max, Display or Demand Gen?
Yes, indirectly, because those campaigns buy open-web display inventory through AdX, and the auction rules for that inventory are what the judge just rewrote.
When a Performance Max campaign shows your ad on a news site or a recipe blog, it buys that impression through Google’s exchange. Under the new rules, rival exchanges get a fairer shot and publishers can set higher floors for Google’s bidder specifically. More competition for the same impression could nudge Display CPMs up; publishers opening more inventory to Google’s demand would push the other way. No one can quote you a number yet, and anyone who does is guessing. The sensible reaction to a one-year implementation window is to measure, not to move money.
| Campaign type | Buys open-web display via AdX? | Affected by the September 2 ruling? | What to watch |
|---|---|---|---|
| Search | No | No | AI Max migration (September 2026), not this case |
| Shopping / Standard Shopping | No | No | Merchant Center feed quality |
| Local Services Ads | No | No | Move into Google Ads interface |
| Performance Max | Partly (Display and Discover placements) | Indirectly, over the next 12 months | Placement report, Display share of spend |
| Display / Demand Gen | Yes | Indirectly, over the next 12 months | CPM trend, view-through conversions |
What to do this week
- Open your Performance Max campaign’s placement report and note the share of spend on Display and Discover versus Search and Shopping. Write it down as a baseline for next spring.
- If you run a standalone Display or Demand Gen campaign, record this month’s average CPM and cost per conversion so any drift after the remedies take effect is easy to spot.
- If your Search campaigns used campaign-level broad match, log in and confirm what the AI Max migration did to your brand inclusions and exclusions. Google said on August 14 they transfer automatically; verify it anyway.
- If you sell products online in Canada, open Merchant Center. Search Engine Roundtable reported on September 3 that Google’s AI performance insights report, which shows how your products appear in AI Mode and AI Overviews shopping queries, expanded from the U.S. to Canada, Australia, India and New Zealand.
Frequently asked questions
Will Google Ads get more expensive because of the ad tech ruling?
Not for Search, Shopping or Local Services Ads, which were never part of the case. For Display, Performance Max and Demand Gen placements bought through Google’s exchange, the auction rules change over the next year and the effect on CPMs could go either way. There is no published estimate of the price impact as of September 4, 2026, so track your own baseline instead.
What is AdX and why did the DOJ want Google to sell it?
AdX is Google’s ad exchange, the marketplace where website owners auction their display ad space to advertisers. The court found in April 2025 that Google tied its exchange to its publisher ad server, which PPC Land reports held about 91% of that market, and used first-look and last-look privileges to win auctions unfairly. The DOJ argued a sale was the cleanest fix. Judge Brinkema ruled on September 2, 2026 that rule changes plus six years of monitoring would deliver relief faster than a divestiture followed by years of appeals.
Is this the same case as the Google search monopoly ruling?
No. There are two separate U.S. antitrust cases against Google. The search case, decided in Washington, D.C., concerned Google paying to be the default search engine on phones and browsers. The ad tech case, decided in Virginia on September 2, 2026, concerns the tools used to buy and sell display ads on other websites. Neither case changes how the Google Search ad auction works for advertisers.
Should a small business keep running Performance Max after this ruling?
Yes, if it is producing tracked leads or sales at an acceptable cost. The ruling changes the plumbing behind some Display placements, not the campaign type itself. Check the placement report, confirm conversion tracking counts real calls and forms rather than page views, and compare cost per lead against your Search campaigns quarterly.
Not sure how much of your Google Ads budget is quietly going to Display? Our ex-Googler founder and team will run a free 48-hour audit of your account. Request your free audit here.
Sources: Search Engine Land, "Google avoids AdX breakup in ad tech antitrust case" (September 2, 2026); PPC Land, "Judge spares Google’s ad exchange and rewrites its auction rules instead" (September 3, 2026); AdExchanger, "Google Won’t Have To Break Up Its Ad Tech Business, Judge Brinkema Rules"; Search Engine Roundtable, "Judge Rules Google Ad Tech Business Won’t Be Broken Up" (September 3, 2026); Search Engine Land, "Google sets AI Max migration timeline for Search campaigns" (August 14, 2026); Search Engine Roundtable, "Google Expands Merchant Center AI Performance Insights" (September 3, 2026).