U.S. Court Rejects Structural Remedies for Google AdX: Perhaps Not a Surprise

The U.S. District Court in Virginia has rejected the U.S. Department of Justice structural remedies in the case of Google advertising antitrust, and instead ordered behavioral remedies. 

The DoJ had asked for divestiture of AdX, among other remedies. Some would have questioned whether divestiture and untangling was feasible, in any case.  

A forced divestiture would likely have meant:

• Possible loss of about 4.1 percent of Google's revenue and 1.5 percent of operating profit (2020 estimate)

• Loss of vertical integration (ability to run the ad server Google Ad Manager, the exchange (AdX) and the buy-side tools all in one stack)

• Losing AdX privileged access to ad server auction data and demand

• Losing capabilities such as  "last look" that advantaged AdX bids over rival exchanges

• Losing the ability to steer publisher and advertiser demand toward its own exchange by default

• Losing a business moat compared to Xandr (Microsoft), PubMatic, Magnite or OpenX.

The financial hit from losing AdX's direct revenue arguably would have been modest. The larger implications were competitive: 

• Losing the ability to internally route demand and auction advantages toward its own exchange

• Losing market share to rivals in the near term

• Facing execution risk from a messy technical separation.

Divestiture would not have affected Google's dominant position in the broader digital ad market (search, YouTube, Google Ads), as none of those were alleged to be monopolies. 

The actual behavioral remedies will be agreed upon by Alphabet and DoJ over the next month. 

Court watchers might have bet on behavioral rather than structural remedies. 

In modern U.S. computing history, courts and agencies overwhelmingly settle on behavioral remedies even after finding liability, and the handful of times a true structural breakup was ordered, it either got overturned on appeal or never survived to implementation. 

The one clean exception is AT&T in 1982 (not a "computing" company, but the antecedent case for how computing cases are usually discussed).

Case	Period	Allegation	Remedy Sought	Outcome	Type
United States v. AT&T (1956 consent decree)	1949–1956	Monopolizing telecom equipment	DOJ sought breakup	Settled: AT&T confined to regulated telephone business, barred from computing/commercial ventures	Behavioral
United States v. IBM	1969–1982	Monopolizing mainframe computing	DOJ sought full breakup	DOJ voluntarily dismissed the case in 1982 as "without merit"	None (dropped)
United States v. AT&T	1974–1982	Monopolizing local/long-distance telephony	DOJ sought breakup	Settled via consent decree: AT&T split into seven regional "Baby Bells"	Structural
United States v. Microsoft	1998–2001	Monopoly maintenance (browser tying)	DOJ sought company split (OS vs. applications)	District court ordered breakup (2000); reversed on appeal; settled 2001 on conduct terms	Behavioral (final)
European Commission v. Microsoft	2004	Abuse of dominance (Windows Media Player tying, interoperability)	Conduct remedies + unbundling	Fine + required unbundled Windows version and interoperability disclosures	Behavioral (with a quasi-structural unbundling element)
FTC v. Intel	2009–2010	Exclusionary dealing with OEMs	Behavioral remedies	Settled via consent order; no divestiture	Behavioral
FTC v. Qualcomm	2017–2020	Exclusionary licensing practices	Injunctive/behavioral remedies	9th Circuit reversed district court; FTC lost entirely	None (FTC lost)
EU v. Google (Shopping, Android, AdSense)	2017–2019	Self-preferencing, Android bundling, ad exclusivity	Conduct remedies + fines	Fines (~€8B combined) plus behavioral conduct changes; no breakup	Behavioral
United States v. Google (Search)	2020–2025	Illegal monopoly via default-placement deals	DOJ sought Chrome/Android divestiture	Judge Mehta (Sept. 2025) denied divestiture; ordered data-sharing and end to exclusive default contracts	Behavioral
United States v. Google (Ad Tech)	2023–2026	Illegal tying of ad server and exchange	DOJ sought AdX divestiture	Judge Brinkema (Sept. 2026) denied divestiture; ordered behavioral remedies	Behavioral
FTC v. Meta	2020–2025	Illegal monopoly via "buy or bury" acquisitions	FTC sought Instagram/WhatsApp divestiture	Judge Boasberg (Nov. 2025) ruled FTC failed to prove current monopoly power; case dismissed	None (FTC lost)

Of eleven major computing/telecom cases spanning roughly 70 years, only the 1982 AT&T case resulted in an actual, implemented structural remedy. 

Microsoft's breakup was ordered but reversed before it took effect. 

Three of the most recent, highest-profile cases (Google Search, Google Ad Tech, Meta) all had the DOJ or Federal Trade Commission explicitly request divestiture, and in every one of them the court either declined to order it or ruled the government hadn't proven its case at all.

Courts in Microsoft, Google Search, and Google Ad Tech all cited the risk of "incredibly messy and highly risky" separations of deeply integrated software/data systems. Judge Amit  Mehta used almost that exact language on Chrome, and Judge Lconic Brinkema's opinion in the AdX case echoed Google's own arguments about technical infeasibility.

Judge Mehta explicitly distinguished growth from "superior product, business acumen, or historic accident" versus growth from illegal conduct, and found Google's dominance wasn't attributable enough to the violation to justify divestiture.

In the Google ad tech case, testimony raised real doubt about whether a workable buyer even existed for AdX, since a divested asset built to be part of one company's stack often isn't viable standing alone.

Fast-moving markets are another issue. Judge James Boasberg's Meta ruling leaned on the idea that computing markets change too quickly for old monopoly findings to still describe today's competitive reality, undermining the case for any remedy, structural or not.