California Regional Multiple Listing Service moved first this week in its legal fight with Compass, but the federal lawsuit also sheds new light on how the dispute escalated — and where there may once have been room for agreement.
CRMLS CEO Art Carter said in an email to Inman that the MLS had hoped its detailed Sept. 30 response to Compass could lead to discussions over how to resolve the dispute. Instead, Carter said Compass “doubled down on its threats and became even more aggressive” over the weekend, prompting CRMLS to file suit Monday in U.S. District Court for the Southern District of New York.
“CRMLS had no choice but to move forward with this filing to preserve the MLS cooperative and ensure that consumers and their agents continue to have equal access to property information,” Carter wrote.
The lawsuit asks a federal judge to declare CRMLS’ cooperation rules lawful under federal and California antitrust law and permanently block Compass from pursuing threatened antitrust claims against the MLS. But the 37-page complaint and its exhibits also offer new details about the yearslong dispute between the organizations.
CRMLS says enforcement cases involving Compass surged
In the filing, CRMLS said relatively few of the thousands of compliance reports it receives each year involved Rule 7.9, which requires certain listings to be submitted to the MLS within one business day of public marketing.
In 2025, CRMLS said it issued 89 fines for Rule 7.9 violations, with just eight of them being made to Compass agents. More than 271,000 listings entered the system that year, the MLS said.
So far in 2026, however, CRMLS said it had processed roughly 300 Rule 7.9 cases, about 75 involving Compass properties. The MLS said reports involving Compass had increased significantly since the spring. Ten Compass cases remained open when the complaint was filed, with eight under appeal.
CRMLS also said it had declined to fine Compass in roughly 25 cases while implementing a new Coming Soon Limited Exposure process, which the MLS said was created in part at Compass’ request.
CRMLS says an earlier compromise fell apart
The filing also suggested that the current standoff between Compass and CRMLS was not inevitable. In a Sept. 30 letter included as an exhibit, CRMLS General Counsel Ed Zorn wrote that the MLS had previously proposed changes to its Coming Soon status that gave listing brokers greater control over distribution to third-party websites.
According to Zorn, Reffkin and Compass General Counsel Ethan Glass initially praised that approach and said it resolved their objections to CRMLS’ rules. CRMLS argued that Compass later reversed course when it issued its Sept. 8 demand.
The complaint made a similar point, saying CRMLS’ Coming Soon status allows public marketing while keeping the listing visible to MLS participants and gives sellers the option to limit distribution to portals including Zillow, Realtor.com, Homes.com and Redfin.
Northwest MLS looms over the dispute
CRMLS is also putting a lot of weight on Compass’ earlier settlement with Northwest Multiple Listing Service.
Compass sued NWMLS over similar listing policies before the two sides settled this year. CRMLS argues that while the settlement changed some NWMLS distribution rules, it preserved the requirement that a listing be submitted for cooperation before it could be publicly marketed.
In a Sept. 30 letter to Compass that CRMLS previously shared with trade media and later attached to the lawsuit as an exhibit, Zorn argued that the NWMLS rules Compass accepted were in some respects more restrictive than CRMLS Rule 7.9. He questioned how Compass could characterize CRMLS’ rules as anticompetitive after agreeing to those terms in Washington.
CRMLS held back some of its threatened claims
CRMLS’ Sept. 30 letter threatened a much broader legal response if Compass sued. Zorn listed seven potential claims, including alleged Cartwright Act violations, unfair competition, interference with contractual and prospective business relationships, breach of fiduciary duty and breach of contract.
But none of those affirmative claims appear in the lawsuit CRMLS ultimately filed. Instead, the complaint contains two causes of action, both seeking declarations that CRMLS’ cooperation rules comply with the Sherman Act and California’s Cartwright Act. CRMLS is also seeking a permanent injunction barring Compass from pursuing antitrust claims over the rules, along with attorneys’ fees and costs.
The underlying disagreement remains the same
Compass argues homeowners should be able to publicly market office-exclusive listings without their agents facing MLS fines or other penalties. CRMLS says the issue is not public marketing itself, but whether a brokerage holding an exclusive listing agreement can market that property publicly while withholding it from the broader MLS cooperative.
The MLS argues Rule 7.9 still gives sellers alternatives, including non-exclusive agreements and “No Cooperation Listings,” while requiring cooperation once an exclusively listed property is marketed publicly.
A Compass International Holdings spokesperson previously told Inman that MLSs supporting more than 350,000 agents across 12 states already allow the type of public marketing Compass favors and said other MLSs should follow their lead.
CRMLS is building a broader legal defense fund
The lawsuit comes as CRMLS is also organizing a legal defense fund that it says could help other MLSs facing similar litigation threats. During a recent call with Inman, CRMLS General Counsel and VP Ed Zorn said other MLSs and brokers had already expressed interest in supporting the fund, which was still being formally organized.
“The intent of the fund is not just for CRMLS,” Zorn said. “It is to be available to those in the community of MLSs [that] find themselves being bullied with threats, and we don’t want somebody to make bad decisions and walk away from defending cooperation simply because some bully with a lot of money is saying, ‘I’m gonna bankrupt you with a lawsuit.’”
Carter said this week that parties interested in participating in or learning more about the fund should contact CRMLS directly.
A person familiar with Compass’ plans told Inman the company still intends to move forward with its own lawsuit against CRMLS and will respond to the MLS’ claims in that filing.
