A ruling that took 20 years to arrive

In August 2024, the Department of Justice won the first significant antitrust case against a dominant US technology company in a generation. Judge Amit Mehta’s ruling in United States v. Google found that Google had monopolized the general internet search market and the search advertising market, in violation of Section 2 of the Sherman Act.

The ruling described, in detail, a long-running pattern. Google paid Apple, Samsung, Mozilla, and other distributors billions of dollars annually to be the default search engine on their devices and browsers. The default-search payments crowded out competitors that could not match Google’s pricing. The dominance enabled by these payments produced search advertising rents that, in turn, funded the next round of default payments. The cycle was self-reinforcing and largely impervious to competitive entry.

The ruling addressed liability. The remedies fight is now beginning, and is the more consequential phase.

What conduct remedies and structural remedies actually mean

Antitrust remedies fall into two general categories with very different track records.

Conduct remedies are behavioral commitments by the dominant firm — promises not to engage in specific anticompetitive conduct, with court oversight. The defendant continues to operate as a single entity but agrees to refrain from particular practices.

The track record of conduct remedies in tech antitrust has been poor. The 1990s Microsoft consent decree is the standard reference. Microsoft agreed to specific behavioral constraints; the constraints proved difficult to define precisely, difficult to enforce, and easy for Microsoft to work around through technical and product design choices. Conduct remedies require ongoing supervision that courts and enforcers struggle to sustain over multi-year horizons.

Structural remedies require divestiture of specific lines of business or assets. The defendant is forced to spin off a portion of its operations as a separate company. Once executed, structural remedies don’t require ongoing supervision — the divested entity is, by definition, separate.

Structural remedies have a stronger track record where they have been used. The 1982 AT&T breakup, while imperfect, produced a competitive long-distance market that benefited consumers for decades. The 1911 Standard Oil breakup, similarly, produced a competitive landscape that enabled subsequent industrial development.

What’s on the remedies table for Google

The DOJ has signaled support for structural remedies. The contemplated divestitures include some combination of:

Chrome browser divestiture. Chrome is the dominant US web browser. As Google’s primary default-search distribution channel, separating Chrome from Google would remove the most consequential lever Google has used to perpetuate search dominance.

Android divestiture. Android is the dominant US mobile operating system (other than Apple’s iOS). Separating Android from Google would similarly remove a primary search distribution channel.

Default-payment prohibition. A strict prohibition on Google paying for default search placement on third-party platforms (Apple, Samsung, Mozilla, etc.). This is a conduct remedy in form but with structural effects.

Data-sharing requirement. Requiring Google to share certain search-related data (queries, click data, etc.) with competitors at regulated rates. The argument: Google’s data advantage is itself a barrier to competition; sharing reduces it.

Acquisition restrictions. Prohibiting Google from making acquisitions in adjacent markets (advertising technology, online services) for a defined period. Helps prevent the firm from entrenching itself in adjacent positions while remedies in core markets are implemented.

The DOJ filed its remedies proposal in late 2024. Google has filed its counter-proposal. The remedies trial is anticipated in 2025. Judge Mehta’s ruling on remedies will define the practical effect of the antitrust win.

What the legal architecture allows

Several legal questions affect what remedies the court can impose:

Tailoring requirement. Antitrust remedies must be tailored to the harm. The remedy cannot, in legal theory, be unrelated to the conduct found unlawful. The DOJ’s case here is straightforward: default-payment dominance produced search dominance, so divestitures or restrictions targeting default-payment infrastructure are appropriate.

Burden of proof. The DOJ bears the burden of demonstrating that proposed remedies are appropriate. The “ineffectiveness of conduct remedies” argument has historical support but is not automatic.

Future commerce. The remedy must address future competitive harm, not just past harm. The court’s focus is on what the market will look like after the remedy.

Implementation. Structural remedies in tech industries pose implementation questions courts have rarely confronted at this scale. Chrome’s separation, in particular, raises operational questions (engineering, infrastructure, product roadmap) that the court will need to address.

The other major cases

The Google search case is the most advanced of several major platform antitrust cases:

DOJ v. Google (AdTech). A separate case addressing Google’s dominance in advertising-technology markets. Reached trial in 2024; ruling pending.

FTC v. Meta. Addresses Meta’s acquisitions of Instagram (2012) and WhatsApp (2014). In active proceedings; potential structural remedy is unwinding of those acquisitions.

DOJ v. Apple. Filed in 2024, addresses Apple’s iOS practices including App Store rules, restrictions on cross-platform messaging, and other conduct.

FTC v. Amazon. Filed in 2023, addresses Amazon’s marketplace practices including seller treatment and Buy Box manipulation.

State AG cases. Several state attorney general antitrust cases, often in coordination with federal cases, are at various stages.

The cumulative effect — should the cases produce structural remedies — would be the most significant restructuring of US technology industries since the 1980s AT&T breakup.

What the legislative complement looks like

The American Innovation and Choice Online Act and similar bills would prohibit specific anticompetitive practices by dominant platforms — self-preferencing, anti-steering, certain forms of discrimination — without requiring antitrust litigation in each instance. The legislation is reintroduced in multiple sessions; it has not been enacted.

The political coalition for AICOA-style legislation has been bipartisan in principle but has faced industry pressure that has prevented advancement. The combined enforcement-and-legislative agenda represents the most concerted antitrust push of the post-1980s period.

What’s at risk

Several scenarios could weaken or reverse the antitrust trajectory:

Conduct-only remedies. If the remedies phase of the Google search case produces conduct remedies rather than structural ones, the practical effect on competitive markets will be substantially diminished.

Appellate reversal. Google has signaled appellate intent. Federal-court antitrust law has been narrowed by Supreme Court rulings over the past 40 years; an appellate ruling that narrows the doctrine further could constrain future cases.

Settlement pressure. Settlement of the major cases short of structural remedies would foreclose the remedies that the underlying cases support.

Administrative posture. The political character of administrations affects DOJ and FTC posture toward platform antitrust. The current cases were filed under the Biden administration’s enforcement agenda; subsequent administrations have varied widely in their commitment to platform antitrust.

Legislative preemption. Federal legislation that preempts state-level antitrust scrutiny — including the form some federal privacy proposals have taken — could constrain the parallel state-level enforcement that has supported the federal cases.

What to watch

• Google search remedies trial and ruling.
• Google AdTech ruling.
• FTC v. Meta proceedings.
• DOJ v. Apple and FTC v. Amazon advancement.
• State AG case outcomes in coordination with federal cases.
• AICOA reintroduction and legislative movement.
• Appellate developments affecting tech-antitrust doctrine.
• DOJ and FTC leadership appointments and stated priorities.

Bottom line

The Google search case ruling is the most consequential antitrust victory against a US technology company in a generation. The substantive ruling addressed conduct that has shaped digital markets for two decades. The remedies fight will determine whether the victory produces meaningful structural change or fades into the conduct-remedy pattern that has constrained tech antitrust historically. Defending the remedies-focused trajectory, advancing the related cases, and supporting the legislative complement together represent the most concerted platform-competition agenda since the 1980s.