"Zillow has filed a federal antitrust lawsuit against Midwest Real Estate Data (MRED) and Compass, alleging the Chicagoland MLS and the nation's largest brokerage conspired to withhold listing data and pressure Zillow to carry private hidden listings nationwide, according to a company announcement."
"The complaint, filed on Tuesday in federal court in Chicago, accuses MRED and Compass of coordinating to threaten Zillow's access to the Chicagoland listing feed unless the portal agreed to display Compass private listings across the United States. Zillow said this conduct amounts to an unlawful group boycott and abuse of monopoly power under the federal Sherman Antitrust Act."
"Zillow alleges that MRED and Compass are colluding to protect and expand private listing networks that keep some homes off public portals and restrict visibility to buyers working with certain brokerages. According to the complaint, the alleged scheme escalated after April 2025, when Zillow adopted its Listing Access Standards, which Zillow said were aimed at restricting hidden or private listings on its platforms."
"In April 2026, MRED and Compass announced a partnership to expand MRED's private listing network nationwide. The arrangement allowed Compass agents across the country to input listings into MRED's system. Zillow alleges that the explicit aim was to shield these listings from pro-transparency platforms and extend MRED's leverage beyond its Chicago-area footprint."
Zillow filed a federal antitrust lawsuit in Chicago against Midwest Real Estate Data (MRED) and Compass. Zillow alleges the Chicagoland MLS and the brokerage coordinated to withhold listing data and pressure Zillow to carry private hidden listings across the United States. The complaint claims MRED and Compass threatened Zillow’s access to the Chicagoland listing feed unless Zillow displayed Compass private listings nationwide. Zillow characterizes the conduct as an unlawful group boycott and abuse of monopoly power under the Sherman Antitrust Act. Zillow alleges the goal was to protect private listing networks that keep some homes off public portals and limit buyer visibility to certain brokerages. Zillow points to escalation after its Listing Access Standards in April 2025 and to a 2026 partnership expanding MRED’s private listing network nationwide.
Read at www.housingwire.com
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