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Ethics/Professional Responsibility

Jul. 15, 2026

Judge disqualifies Quinn Emanuel from representing CREXi in CoStar copyright fight

U.S. District Judge Consuelo B. Marshall found that the firm violated its duty of loyalty by simultaneously representing CoStar in an unrelated matter without obtaining informed written consent.

Judge disqualifies Quinn Emanuel from representing CREXi in CoStar copyright fight
Alex Spiro

A federal judge has disqualified Quinn Emanuel Urquhart & Sullivan LLP from representing Commercial Real Estate Exchange Inc. in a high-profile copyright dispute after finding the firm improperly represented clients with directly adverse interests at the same time.

U.S. District Judge Consuelo B. Marshall granted CoStar Group Inc.'s motion to remove Quinn Emanuel as counsel for CREXi, ruling Monday that the firm's concurrent representation of CoStar in a separate feder...

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