CoStar Group, Inc., et al., Petitioners v. Commercial Real Estate Exchange, Inc.

  1. March 04, 2026

    CoStar Wants High Court Review Of Antitrust Counterclaims

    CoStar Group Inc. and CoStar Realty Information Inc. made another attempt to persuade the U.S. Supreme Court to review the revived antitrust counterclaims lodged by CoStar's business rival, Commercial Real Estate Exchange Inc.

  2. February 17, 2026

    CoStar Rival Urges High Court To Reject Antitrust Appeal

    A rival accusing CoStar of blocking competition for commercial real estate listing services is urging the U.S. Supreme Court not to review a ruling that revived the rival's counterclaims, saying that CoStar just disagrees with how the appeals court viewed the allegations.

  3. January 13, 2026

    CoStar, Quinn Emanuel Spar Over Litigation Representation

    CoStar urged a California federal judge Tuesday to disqualify Quinn Emanuel Urquhart & Sullivan LLP from helping a rival commercial real estate platform pursue antitrust counterclaims in CoStar's copyright infringement suit, while the law firm moved to drop its representation of CoStar in separate litigation.

  4. January 08, 2026

    Amici Back CoStar's Review Bid For Rival's Antitrust Claims

    Technology industry coalition Chamber of Progress and other parties are urging the U.S. Supreme Court to grant commercial real estate information company CoStar's review petition for a Ninth Circuit ruling that revived a business rival's antitrust counterclaims.

  5. January 07, 2026

    Commercial Real Estate Cases To Watch In 2026

    Antitrust cases, casino disputes and legal clashes involving real estate investment trusts are among the major commercial real estate cases that attorneys should keep an eye on in 2026.

  6. December 09, 2025

    CoStar Urges Justices To Review Revived Antitrust Claims

    CoStar is asking the U.S. Supreme Court to review a Ninth Circuit ruling reviving antitrust counterclaims from a rival commercial real estate platform, saying the appeals court accepted a novel theory of what constitutes exclusive dealing.