Judge Denies DOJ’s Bid to Break Up Google Ad Tech Business
Judge Brinkema denies DOJ’s request to break up Google’s ad tech business.
Why it matters: This ruling redefines possible remedies in Big Tech antitrust cases, impacting compliance and litigation strategies. Legal teams must reassess risk and remedies for digital ad market dominance.
- April 2025: Judge Brinkema finds Google monopolized open-web publisher ad server and exchange markets.
- 2023: DOJ and 17 states sued Google over monopoly allegations in digital advertising.
- September 2, 2026: Judge rejects DOJ's demand for Google ad tech breakup, favors behavioral remedies.
- Alphabet's ad unit earned $71.34 billion in H1 2026, underscoring Google's market power.
U.S. District Judge Leonie Brinkema ruled on September 2, 2026, against the Department of Justice’s 2023 antitrust lawsuit seeking to break up Google’s ad tech business.
The case originated in 2023 when the DOJ, joined by 17 states, alleged that Google unlawfully maintained monopoly power in the open-web digital advertising space. In April 2025, Judge Brinkema ruled that Google controlled the publisher ad server and ad exchange markets for open-web display advertising, constituting illegal monopolization.
The DOJ sought structural remedies, including divesting Google’s ad exchange platform, known as AdX, and open-sourcing its auction logic. However, Judge Brinkema declined these demands, instead favoring behavioral remedies aimed at curbing anti-competitive conduct without breaking up business units.
This ruling marks a notable shift in antitrust enforcement approaches toward Big Tech. It signals courts may prefer less disruptive, behavior-based solutions over forced structural breakups in digital markets.
Google’s Vice President of Regulatory Affairs, Lee-Anne Mulholland, said, "We’re pleased the Court rejected the DOJ's proposal to break apart tools that help small businesses grow." While a corporate statement, it reflects Google’s framing of the ruling.
Alphabet’s advertising unit reported $71.34 billion in revenue during the first half of 2026, highlighting its dominant role in the approximately $1 trillion global advertising market.
For legal professionals, this decision influences how courts may balance competition concerns and remedies in digital advertising. Firms advising clients on antitrust risk and compliance should closely track evolving enforcement tactics shaped by this ruling.
By the numbers:
- $71.34 billion — Alphabet ad unit revenue in H1 2026
- 2023 — Year DOJ and 17 states sued Google for ad tech monopoly
- April 2025 — Initial ruling finds Google illegally monopolized key ad markets
Yes, but: While the judge rejected the breakup, behavioral remedies could still impose significant operational constraints on Google, details of which remain undisclosed.
What's next: Monitoring forthcoming court filings and any appeals will clarify enforcement scope and the practical impact of behavioral remedies.