Google Ad-Tech Antitrust Ruling: What Judge Brinkema’s Remedies Order Means for Corporate Counsel

What did Judge Brinkema actually rule?

Judge Brinkema rejected all three structural remedies the DOJ requested — divestiture of AdX, open-sourcing DFP’s auction logic, and contingent divestiture of DFP — and instead adopted “most of the parties’ proposed behavioral remedies, as modified by this Court.”

The order came in United States v. Google LLC, No. 1:23-cv-108, in the U.S. District Court for the Eastern District of Virginia. It follows Judge Brinkema’s April 2025 liability finding that Google illegally monopolized the publisher ad server market and the ad exchange market, and unlawfully tied its DFP and AdX products together, in violation of the Sherman Act. The September 2 order was the remedies phase of that same case — the “what do we do about it” ruling that follows a liability verdict.

Crucially, the order itself is only two pages long and does not spell out the specific behavioral obligations. The detailed reasoning sits in an accompanying memorandum opinion that was filed under seal so the parties could request redactions, a process that reporting citing the docket says concludes around September 16, 2026 — the same day this article publishes. Unless the court grants redaction requests, the opinion becomes public automatically once that window closes.

Which specific fixes did the court order Google to make?

Public reporting on the order and the parties’ pre-ruling proposals converges on four behavioral obligations that were adopted or closely tracked by the court, though the fully reconciled list awaits the unsealed opinion.

• Real-time bid transparency: Google must make real-time bid amounts for open-web display ads sold through AdX available to competing ad servers, so rivals are not shut out of pricing signals Google’s own DFP server can see.
• End to Unified Pricing Rules: Google must deprecate Unified Pricing Rules and let publishers set different price floors for individual bidders in Google Ad Manager, restoring pricing flexibility publishers lost under the prior regime.
• No “first look” or “last look”: Google is barred from using its “first look” and “last look” privileges — which let its own exchange see and react to competing bids before finalizing its own — on open-web display inventory.
• Interoperability commitments: The court leaned on interoperability measures both sides had floated, including closer integration with independent auction technology such as Prebid, rather than mandating a sale of any Google asset.

According to Digital Applied’s review of the docket, the parties proposed sharply different monitoring windows — Google floated six years, the government sought ten — and the court’s chosen duration remains under seal pending the October 2 final judgment filing.

Why did the judge decline a breakup after finding Google liable?

Brinkema found breakup risk and delay outweighed the benefit of a forced sale, and she was skeptical a qualified buyer for AdX could be found without years of added litigation.

According to reporting on the closing arguments, she also flagged that “time is somewhat of the essence” given how fast AI is reshaping digital advertising, suggesting a lengthy divestiture process could be outdated before it finished.

The ruling also mirrors the outcome one year earlier in the separate Google Search monopolization case before Judge Amit Mehta in the District of Columbia, where the DOJ’s request to force a sale of Chrome was rejected in September 2025 in favor of data-sharing and choice-related conduct remedies. That case remains on appeal, with Google and the DOJ (joined by 38 state attorneys general) each challenging different parts of Judge Mehta’s remedies order. Taken together, the two rulings — over two consecutive Septembers, against the same defendant, in two different monopolization cases — now form the clearest signal yet that federal courts are gravitating toward behavioral fixes over structural breakups even after finding a company liable for illegal monopolization.

How did Google, the DOJ, and industry groups react?

Google framed the ruling as a clear win, while the DOJ signaled the fight over remedies may not be over. Industry groups split along predictable lines between the ad-tech incumbent and publishers who wanted more.

Google’s vice president for regulatory affairs, Lee-Anne Mulholland, said the company was “very pleased the Court rejected the DOJ’s proposal to break apart tools that help small businesses reach new customers and grow.” The Computer & Communications Industry Association, a trade group that counts Google as a member, also welcomed the outcome; CCIA president and CEO Matt Schruers said “the Court rightly rejected the proposed break-up of Google’s ad-tech business, which would have gone far beyond the judge’s original findings in the case,” arguing that “antitrust remedies should be narrowly tailored to address specific identified harms.”

The DOJ’s Antitrust Division, for its part, did not concede the fight. Officials said the government would “continue to review the opinion” to weigh “next steps regarding seeking additional relief” — language that leaves an appeal on the table, an option some advocacy and publisher groups, including Digital Content Next, have already urged the department to pursue. Publisher-side ad-tech vendors were more measured: PubMatic said the behavioral remedies “should establish a level playing field for all market participants,” while ad-tech consultant Jay Friedman, who testified in the case, questioned whether publishers who switch away from Google’s ad server can still access Google’s buy-side demand in a way that makes switching commercially viable — a gap the real-time bid-sharing requirement is meant to close but that critics say may not fully solve.

What should legal and compliance teams do now?

Companies do not need to be Google, a publisher, or an ad-tech vendor to be affected. Any business that buys or sells programmatic display advertising sits inside the fact pattern this order regulates.

Antitrust and competition counsel more broadly should treat the court’s choice of remedy — not just the outcome for Google — as new precedent worth building into risk assessments.

• Calendar the unsealing and final judgment dates. The memorandum opinion is expected to become public around September 16, 2026 (absent granted redactions), and the parties must file a joint proposed final judgment by roughly October 2, 2026. In-house teams with programmatic ad spend or ad-tech vendor relationships should have someone assigned to review both documents the moment they post to the E.D. Va. docket.
• Audit ad-tech vendor and publisher contracts now. If your company runs display advertising through Google Ad Manager or negotiates directly with publishers, review contract language tied to Unified Pricing Rules, price-floor mechanics, and auction-priority terms — these are the exact mechanics the court’s order targets, and vendor terms may need to change once the final judgment specifies compliance obligations.
• Reassess antitrust risk models for pending M&A. Deal teams evaluating any transaction with Section 2 monopolization exposure should update their remedy-risk assumptions: this ruling, paired with the 2025 Google Search remedies decision, indicates federal courts are currently more inclined toward negotiated behavioral commitments than forced divestitures, which changes the probability-weighted cost of litigated antitrust risk in deal models.
• Watch the appeal signal. The DOJ’s public statement leaves room for an appeal seeking stronger relief. Litigation and government-affairs teams tracking Big Tech antitrust exposure (including in the parallel Google Search appeal before the D.C. Circuit) should treat this as an active, multi-front case rather than a closed matter.
• Brief the board and C-suite on the precedent, not just the outcome. General counsel at any large enterprise — not just tech companies — should flag this as the second consecutive year a federal court found a dominant platform liable for illegal monopolization yet declined a breakup, a trend directly relevant to how the company should think about its own market-share concentration risk.

What happens next in the case?

Two near-term deadlines determine when the real compliance obligations become knowable. Redaction requests were due roughly 14 days after the ruling, around September 16, 2026, after which the sealed opinion should become public.

Separately, the parties have roughly 30 days from the ruling — around October 2, 2026 — to submit a single jointly proposed final judgment translating the court’s behavioral-remedies decision into an enforceable injunction with specific compliance deadlines, monitoring terms, and reporting obligations. Until that final judgment is entered, the practical scope of Google’s obligations — including the length of any monitoring period, which the government and Google proposed at ten and six years, respectively — remains unresolved. Any appeal, by either side, would likely follow entry of that final judgment.

Frequently asked questions

What is United States v. Google LLC (the ad-tech case) about?

It is a Sherman Act monopolization case brought by the DOJ and a coalition of state attorneys general alleging Google illegally monopolized the publisher ad server and ad exchange markets and unlawfully tied its DFP and AdX products together. Judge Leonie Brinkema found Google liable in April 2025 and issued the remedies ruling on September 2, 2026.

Does Google have to sell any part of its ad-tech business?

No. Judge Brinkema rejected the DOJ’s request to force divestiture of AdX and DFP, instead ordering behavioral remedies such as sharing real-time bid data with competitors and eliminating certain bidding privileges.

When will the full details of the remedies be public?

The memorandum opinion explaining the ruling was sealed to allow redaction requests, with that window closing around September 16, 2026. A joint final judgment spelling out specific compliance obligations is due around October 2, 2026.

Is this the same case as the Google Search antitrust ruling?

No. This is a separate case, before a different judge (Brinkema in the Eastern District of Virginia, versus Amit Mehta in the District of Columbia for the search case), though both involve Google, both resulted in liability findings, and both remedies rulings rejected DOJ-requested breakups in favor of behavioral fixes.

Could the DOJ still appeal for a breakup?

Yes. The Antitrust Division said it would continue reviewing the opinion to consider “next steps regarding seeking additional relief,” which leaves an appeal open, though no notice of appeal had been confirmed as of this writing.

Last Updated: September 16, 2026. For related coverage, see kurums.com’s analysis of the Delaware PBC board-duties ruling, the SEC semiannual reporting proposal, and the kurums.com Law hub for ongoing regulatory and antitrust coverage.