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Mealeys

MLex

May 20, 2026

ONE REAL ESTATE LLC, dba THE ONE STREET COMPANY v. COSTAR GROUP, INC. et al

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Case Number:

1:26-cv-01735

Court:

District Of Columbia

Nature of Suit:

Anti-Trust

Multi Party Litigation:

Class Action

Judge:

Sparkle L. Sooknanan

Firms

Companies

Sectors & Industries:

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Reflects complaints, answers, motions, orders and trial notes entered from Jan. 1, 2011.
Additional or older documents may be available in Pacer.

Coverage

  1. May 21, 2026

    CoStar Hit With Antitrust Suit Alleging Data Monopoly

    A Washington, D.C., brokerage has filed a proposed class action against CoStar in federal court, alleging a decades-long anticompetitive scheme designed to maintain a monopoly over commercial real estate listing services and information services.

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