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Zillow, Compass, and MLS battle over listing visibility in Chicago

Created at 31 Jul · 6:46 PM1 source↑ Market-relevant
IN SHORT

A federal judge in Chicago is deciding a crucial antitrust case where Zillow accuses Midwest Real Estate Data (MRED) and Compass of blocking its listing access. The outcome will determine control over where real estate listings are displayed, impacting agents and sellers.

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Key Numbers

48-pageZillow's filing length
40-pageMRED and Compass's joint brief length
October 2025Email date from Compass CEO to MLSs
2008Year of DOJ settlement with National Association of Realtors
50%Zillow's potential listing supply reduction in Chicagoland
July 10, 2026HousingWire article date

Who's Involved

Zillow
Accused of blocking listing access and imposing standards
Compass
Accused of laundering private exclusive listings and pressuring MLSs
Midwest Real Estate Data (MRED)
MLS accused of blocking Zillow's feed access
Robert Reffkin
CEO of Compass, urged MLSs to discipline Zillow
Rebecca Jensen
CEO of MRED, expressed disgust at Zillow's policy
Judge John Tharp Jr.
Federal judge deciding Zillow's antitrust case
Darryl Davis, CSP
Real estate coach and author advising agents
Zillow, Compass, and MLS battle over listing visibility in Chicago

↳ Why This Matters

This case will determine the rules of listing visibility on major real estate platforms, impacting how properties are marketed and seen by consumers, and potentially reshaping the competitive dynamics between real estate portals, MLSs, and brokerages.

Key facts

  • Zillow is in an antitrust case against Midwest Real Estate Data (MRED) and Compass over listing visibility.
  • Zillow's Listing Access Standards require listings to be on IDX or VOW feeds within one business day of marketing.
  • Compass and MRED argue Zillow's policy harms itself and pushes sellers towards less transparent listings.
  • The case before Judge John Tharp Jr. will determine preliminary operating rules for the MRED MLS.
  • The article advises real estate agents to focus on client trust and transparent marketing plans regardless of the lawsuit's outcome.

A federal judge in Chicago is presiding over an antitrust case where Zillow is suing Compass and Midwest Real Estate Data (MRED), an MLS. Zillow alleges that Compass and MRED colluded to block its access to property listings, particularly impacting Zillow's ability to display listings that are marketed privately before reaching the MLS. Zillow's Listing Access Standards require properties to be available on IDX or VOW feeds within one business day of public marketing, a rule that directly affects Compass's private exclusive listings.

MRED and Compass, in their joint defense, argue that Zillow's actions are self-inflicted and that Zillow's policy actually promotes less transparency by pushing sellers towards completely private listings. They contend that Zillow's feed, which they describe as the 'lifeblood' of its business, is received virtually for free, and all Zillow needs to do is not subjectively ban listings. MRED also points to a 2008 DOJ settlement that barred MLSs from hiding listings from consumer portals, stating its display rules are objective.

Testimony revealed sharp exchanges, with MRED's CEO expressing dismay at Zillow's awareness of potential MLS rule violations when implementing its policy. Compass's CEO testified that Zillow used incentives to discourage Compass from marketing listings off-portal. The core of the dispute centers on who controls the flow of listing information and where listings are ultimately displayed to consumers.

Real estate coach Darryl Davis emphasizes that this legal battle is between corporations and does not directly involve listing agents, whose primary asset is client trust. He advises agents to create detailed marketing plans for sellers, audit their listing sources, and maintain clear communication to reassure clients amidst the ongoing 'portal wars.' Davis suggests that regardless of the court's decision, the landscape of listing distribution will continue to evolve, and agents should focus on serving their clients rather than the corporate disputes.

Frequently asked questions

Zillow's standards ban a home from being listed on Zillow if it is not available on IDX or VOW feeds within one business day of being publicly marketed.

They argue that any harm Zillow faces is self-inflicted and that Zillow's policy pushes sellers toward less transparent, truly secret listings rather than open MLS listings.

The article highlights that agents are the trusted point of contact for sellers, a relationship that corporations like Zillow and Compass cannot replicate, regardless of who controls listing distribution.

The settlement barred MLSs from hiding listings from consumer portals, which MRED cites as a basis for its display rules requiring objective criteria.

What Happens Next

01Judge John Tharp Jr. will rule on Zillow's request for a preliminary injunction.
02The case will proceed toward a full trial if a preliminary injunction is granted or denied.

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Cadence

How It Developed

Zillow, Compass, and Midwest Real Estate Data (MRED) filed post-hearing briefs in Zillow's antitrust case.
Zillow accused MRED and Compass of blocking its Listing Access Standards and Compass of laundering private exclusive listings.
Compass CEO Robert Reffkin urged MLSs to terminate Zillow's feed access if standards were not repealed.
MRED and Compass argued Zillow's harm is self-inflicted and that Zillow's policy pushes sellers toward secret listings.
Zillow's Listing Access Standards ban listings not available on IDX or VOW feeds within one business day of marketing.
MRED stated its display rules require objective criteria and stem from a 2008 DOJ settlement.
Judge John Tharp Jr. must decide if Zillow is likely to win and faces irreparable harm.
Zillow warned losing MRED's feed would cause a 'downward spiral' and undermine its brand promise.

Sources

T1
Who decides where listings show up, Zillow, Compass or the MLS?HousingWire

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