The battle over who gets to control residential real estate listings — which Zillow repeatedly called “the lifeblood” of the industry — is in the hands of federal Judge John J. Tharp Jr. after two days of courtroom clashes between the online property portal, Compass and Chicago’s multiple listing service.
The dispute is about far more than a listing feed that got switched off for two days in May. It could determine who controls the future of residential inventory.
These were the highlights and key takeaways from the two-day preliminary injunction hearing held Wednesday and Thursday in a Chicago courtroom.
The Velvet Rope
Zillow’s Errol Samuelson took the stand to defend the portal’s “listing access standards,” arguing that Compass’ business model of initiating home offerings in private channels traps the market “behind a velvet rope.” Zillow claims the Chicago MLS’s move to black out the portal’s data feed on May 20 — sparked by a dispute over out-of-state Compass listings — was a coordinated group boycott designed to protect Compass private exclusives.
But Compass and the MLS — Midwest Real Estate Data, known as MRED — didn’t flinch. Rebecca Jensen, the CEO of MRED, fiercely defended her decision to sever Zillow’s data feed in May, citing the portal’s failure to comply with “objective criteria” rules that restrict how brokerages can filter listings. Taking the stand, Jensen declared herself the ultimate arbiter, tasked with calling balls and strikes when brokerages have disputes over listing practices.
Zillow felt that the communication between Compass and MRED in the lead up to the portal’s listing data being shut off contradicted testimony from Reffkin, Jensen and their respective colleagues.
“The conduct at the center of this case is not limited to Chicago, but a test of whether this playbook can become a national template for hiding homes that can be replicated in market after market,” a Zillow spokesperson said. “If so, that could spell the end of the open, transparent housing system that benefits buyers, sellers and agents nationwide.”
Testy Testimony
Day two brought fireworks just ahead of the nation’s 250th Independence Day celebration from Compass CEO Robert Reffkin’s testimony. He defended his brokerage’s three-phase marketing strategy and accused Zillow of a monopolistic shakedown, claiming the portal once dangled up to $1.6 billion in revenue uplifts to stop Compass from marketing outside Zillow.
Reffkin didn’t mince words, accusing Zillow of weaponizing historical racial discrimination to protect its profits, rather than caring about consumer protections.
The Bigger Picture
Beneath the courtroom drama lies the industry’s tectonic shift: Compass’ alleged strategy to turn regional listing services like MRED into a national, pro-seller-choice bloc. Reffkin called MRED “the best MLS in the country,” while Zillow admitted evidence showing he blasted other MLS firms in written communications, and the Maryland-based Bright MLS in particular.
“I think Bright MLS is scared of being sued so they don’t want to enforce their own rule neutrally,” Reffkin said. “The truth is you and Bright MLS and all the MLSes except MRED and [Tennessee-based] Realtracs have completely sold us out. I no longer want to support Bright MLS in any way and won’t be coming to your event this summer,” he was shown to have written to a Bright executive.
As dueling economists traded blows over whether private listing networks ultimately raise or lower sale prices, one thing became clear: the traditional MLS ecosystem is fracturing, and the impending ruling by Judge Tharp could reshape the portal wars forever.