Key facts
- CoStar's motion to file an amicus brief in Zillow's litigation against MRED and Compass was denied by Judge John Tharp.
- CoStar sought to highlight Zillow's alleged hypocrisy in demanding MLS access while creating its own pre-market listing channel.
- CoStar claimed Zillow's actions aim to expand its ecosystem and replace the non-profit MLS system, disadvantaging rivals.
- Zillow's lawsuit against MRED and Compass alleges a conspiracy to withhold listing data and pressure Zillow to carry private listings.
- MRED is under a temporary restraining order to continue supplying Zillow with a listing feed, while Zillow is prevented from banning MRED listings.
CoStar's attempt to intervene in the legal dispute between Zillow, Midwest Real Estate Data (MRED), and Compass International Holdings has been unsuccessful. U.S. federal judge John Tharp denied CoStar's motion to submit an amicus curiae brief, without providing a specific reason.