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S.D.N.Y.Procedural orderFiled Sept. 25, 2025

In re Google Digital Advertising Antitrust Litigation

Judge
P. Castel
Docket
1:23-cv-05177
Court
U.S. District Court · Southern District of New York
Pages
8
AntitrustCivil Procedure
In one sentence

In re Google Digital Advertising Antitrust Litigation: Judge Castel granted plaintiffs’ motions to add a worldwide market alternative to their antitrust pleadings.

Who this affects

The Advertisers Class, Publishers Class, Inform, the Daily Mail, and Gannett may amend their pleadings to allege a worldwide geographic market as an alternative to a United States market; Google must respond to the amended pleadings. The order also provisionally grants sealing requests concerning submissions on the amendment motions.

What happened

In In re Google Digital Advertising Antitrust Litigation, several plaintiffs asked to amend their pleadings to allege a worldwide geographic market as an alternative to a United States market. They relied partly on findings from a related case in which Judge Leonie Brinkema found a worldwide market for certain digital advertising services.

Google opposed the amendments, arguing that they were late, would prejudice Google, and would not support viable claims. The court found that Google had already analyzed both United States and worldwide markets, so the amendments would not create unfair prejudice. The court also found good cause to modify the scheduling deadline and rejected Google’s argument that the amendments would be legally futile.

Judge Castel granted the motions of the Advertisers Class, Publishers Class, Inform, the Daily Mail, and Gannett to amend their complaints. The amended pleadings were due within seven days, answers were due within fourteen days after that, and motions to seal supporting or opposing submissions were provisionally granted. The court did not decide whether plaintiffs would receive partial summary judgment based on issue preclusion.

The detailed version

For law students, journalists, and other readers who want the full reasoning

Case
In re Google Digital Advertising Antitrust Litigation · No. 1:23-cv-05177
Judge
P. Castel
Date
Sept. 25, 2025

Background

Certain plaintiffs in the coordinated multidistrict litigation asked for partial summary judgment based on issue preclusion, a rule that can prevent a party from relitigating an issue already decided in an earlier case. They relied on Judge Leonie Brinkema’s findings after a trial in a related action brought by the United States and several states in the Eastern District of Virginia. That court found that the relevant geographic market for publisher ad servers and ad exchanges used in open-web display advertising was worldwide, subject to specified exceptions.

The plaintiffs’ existing pleadings in this multidistrict litigation alleged that the relevant geographic market was the United States. The Advertiser Class, Publisher Class, Inform, the Daily Mail, and Gannett moved to amend their pleadings principally to allege a worldwide market as an alternative to a United States market. In one instance, the proposed pleading alleged a worldwide market with a United States submarket. The Publisher Class also noted that conforming the pleadings to Judge Brinkema’s findings could affect Google’s arguments against issue preclusion.

Google’s objections

Google opposed the amendments. It argued that the motions were filed more than two years after the scheduling deadline for amendments, that expanding the allegations would prejudice its ability to defend against a worldwide market, and that the proposed amendments were futile. Google also argued that the geographic market in this litigation differed from the market addressed in the Eastern District of Virginia action.

Court’s analysis

The court concluded that Google would suffer no unfair legal prejudice from allowing the alternative worldwide-market allegations. Google had conducted discovery and defended against claims involving a United States or worldwide market in the related action. Google’s experts had also analyzed both markets in the related action and in this multidistrict litigation. The court said that any prejudice based on potentially making Google’s issue-preclusion argument moot was not a legally cognizable form of unfair prejudice.

The court also found good cause to permit the amendments under Federal Rule of Civil Procedure 16(b)(4), which allows a scheduling order to be changed for good cause and with the judge’s consent. Although the amendments followed the original deadline, the court had invited motions to conform the pleadings to Judge Brinkema’s findings and had established a new schedule. The plaintiffs moved under that new schedule. The court considered the timing of the ongoing expert discovery, class-certification briefing, and summary-judgment briefing, and concluded that allowing the amendments would further the goal of resolving the litigation fairly, promptly, and inexpensively.

The court rejected Google’s futility argument. Under Federal Rule of Civil Procedure 8(d)(2), parties may plead alternative statements when at least one alternative is sufficient. The court held that pleading a worldwide market as an alternative to a United States market, or alleging a worldwide market with a United States submarket, would survive a motion to dismiss. The court did not decide whether the plaintiffs’ pending motions for partial summary judgment based on issue preclusion were appropriate.

Ruling

Judge Castel granted the motions of the Advertisers Class, Publishers Class, Inform, the Daily Mail, and Gannett to amend their complaints in the forms identified in their proposed amendments. The amended pleadings were ordered filed within seven days, and answers were due within fourteen days after filing. The motions to seal submissions supporting or opposing the motions to amend were provisionally granted. The order did not resolve the pending issue-preclusion motions for partial summary judgment or decide the merits of the antitrust claims.

The authoritative version

Read the full 8-page opinion on CourtListener, the free public archive maintained by the Free Law Project.

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