A Chicago federal judge heard two days of testimony from Zillow, Compass, and MRED executives on a TRO blocking Zillow's listing access enforcement, with no ruling yet issued.
A federal court in Chicago completed two days of evidentiary hearings July 1 and 2 on whether to lift a temporary restraining order that bars Zillow from enforcing its listing access standards against listings supplied by Midwest Real Estate Data, known as MRED [1]. Executives from Zillow, Compass, and MRED each testified before Judge John Tharp of the U.S. District Court for the Northern District of Illinois [1]. Judge Tharp had not issued a ruling as of the latest available reports [1].
The hearings arose from Zillow's effort to apply its listing standards, which restrict certain listing practices, to data flowing through MRED's feed [1]. Compass, which markets listings through MRED and relies on the feed's distribution reach, joined the litigation as a party opposing Zillow's enforcement position [1]. The TRO, already in place, had frozen Zillow's ability to act on its standards while the underlying antitrust dispute proceeds toward a fuller merits determination [1]. The case is styled as a challenge to whether Zillow's listing access policies constitute anticompetitive gatekeeping over a data channel that brokers depend on for consumer-facing exposure.
The testimony surfaced the competitive stakes in concrete terms. Zillow's Chief Financial Officer testified that a permanent loss of MRED's listing feed would send the company into a downward spiral, framing feed access as integral to Zillow's consumer traffic model [1]. Compass Chief Executive Robert Reffkin testified directly on competitive harm, providing the court with a named-executive account of how the listing access dispute affects brokerage operations [1]. MRED Chief Executive Rebecca Jensen and additional witnesses from both sides rounded out the record [1].
The substantive significance extends beyond the immediate parties. The litigation arrives in the aftermath of the National Association of Realtors' landmark settlement that restructured buyer-agent compensation rules, leaving MLS data governance as one of the next contested frontiers in real estate antitrust law [1]. A ruling that curtails Zillow's ability to enforce listing standards against an MLS feed could establish a precedent limiting how dominant listing portals condition data access, affecting portal-MLS relationships nationwide [1].
Judge Tharp must now decide whether the balance of harms and likelihood of success on the merits warrants converting, modifying, or dissolving the TRO, with the case then proceeding toward a preliminary injunction ruling and, ultimately, trial on the underlying antitrust claims [1].