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SCOTUS Rejects Zillow Antitrust Appeal in Real Estate Tech Dispute

By  |  October 20, 2025

The U.S. Supreme Court on Monday declined to take up an appeal from Real Estate Exchange Inc. (REX), a defunct real estate brokerage that had accused Zillow and the National Association of Realtors (NAR) of colluding to stifle competition in the online home listings market, according to Reuters.

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    REX had sought to overturn a lower court’s decision that found it failed to show that Zillow and NAR conspired to disadvantage its property listings. The company’s lawsuit, filed in 2021, centered on the “no-commingling” rule created by the National Association of Realtors, which allowed Zillow and other real estate platforms to separate listings from multiple listing services (MLS) from those of independent brokers. REX argued that the rule restricted consumer choice and made its listings harder for buyers to find, per Reuters.

    The now-defunct brokerage also accused Zillow of misleading consumers by redesigning its website to display MLS-affiliated listings in a separate tab from those posted by non-member firms such as REX. The company claimed this layout gave an unfair advantage to listings connected to NAR members.

    Related: Attorneys General from Five States Sue Zillow and Redfin Over Alleged Antitrust Violations

    In a statement, Zillow welcomed the Supreme Court’s decision, saying it “reinforces our long-standing commitment to transparency, innovation and prioritizing consumers.” According to Reuters, the National Association of Realtors also expressed support for the outcome, maintaining that its “no-commingling” policy was optional, has since been discontinued, and did not breach antitrust laws.

    Court records cited by Reuters show that individual MLS organizations independently decided whether to adopt the rule, and some chose not to implement it. With the Supreme Court declining to hear the case, the lower court’s dismissal remains intact, effectively closing REX’s legal challenge.

    Source: Reuters