
CoStar Files Amicus Brief Opposing Zillow’s Injunction in MRED Case
CoStar filed an amicus brief opposing Zillow’s injunction motion in the MRED case, arguing Zillow Preview contradicts Zillow’s own legal position.

CoStar filed an amicus brief opposing Zillow’s injunction motion in the MRED case, arguing Zillow Preview contradicts Zillow’s own legal position.

Zillow filed a federal antitrust lawsuit alleging MRED and Compass conspired to cut off listing data access and force Zillow to promote private listings nationwide.

In a new court filing, Zillow accuses Compass of running a “Hidden Listing Scheme” that limits transparency and misleads buyers through its three-phase marketing strategy. The filing urges the court to deny Compass’ request for an injunction and defends Zillow’s 24-hour listing policy as pro-consumer and pro-competition.

Compass has filed a motion to block Zillow’s new Listing Access Standards (LAS), citing potential business losses and consumer harm. The case could have broad implications for agents using pre-MLS marketing strategies.