As the next heated step in its nationwide battle against MLS incumbents, Compass filed more than a dozen federal antitrust lawsuits against 15 MLSs today, carrying out a promised threat to take a bitter, long-running dispute over restrictions on off-MLS marketing to the courtroom.
According to a release, Compass is accusing the MLSs in question of “fining and punishing agents who publicly market homes as their clients have lawfully instructed.” It also notes that said fines can reach up to $15,000.
“Only the law and the homeowner should tell agents how to market a home, and the MLS is neither the law nor the homeowner,” a Compass spokesperson stated. “Agents should be free to compete on the marketing strategies they offer.”
One of the initial complaints obtained by RISMedia targets Hive MLS in North Carolina. The 45-page lawsuit alleges two violations of federal antitrust laws, accusing the MLS of conspiracy and an illegal group boycott.
“Homeowners should be free to choose how to sell their own homes without having a competition-killing real estate industry organization tell them how to do it,” the complaint begins.
The lawsuits are against six MLSs based in California:
- bridgeMLS
- Bay East MLS
- Contra Costa MLS
- MLSListings
- The MLS/CLAW
- San Diego MLS
Three MLSs in North Carolina:
- Canopy MLS
- Hive MLS
- Doorify MLS
And six MLSs are spread throughout the country:
- Arizona Regional Multiple Listing Service (ARMLS)
- REcolorado
- NorthstarMLS (Minnesota)
- HAR (Texas)
- Stellar MLS (Florida)
- OneKey MLS (New York)
Several of the MLSs targeted—including Hive MLS, ARMLS, REcolorado, Canopy MLS, Doorify MLS and bridgeMLS—already sued Compass, asking a judge to preemptively declare their rules do not violate antitrust laws. They have characterized their various policies, which restrict how members can market listing off-MLS, as pro-competitive and pro-consumer, and claimed Compass is merely seeking to use its exclusive listings as a “competitive weapon.”
Compass, on the other hand, has repeatedly accused these MLSs of fighting purely to protect their own interests and claimed the MLS industry has long endured antitrust scrutiny from government regulators. It sent letters to many of these MLSs back in September, explicitly threatening to sue and force them to bear the legal costs if they continued enforcing the policies in question.
“It’s almost as if these MLSs are asking people to ignore the evidence that proves their claims aren’t true,” the Compass spokesperson said. “For years, seven of the top 25 MLSs, covering 340,000 agents across 12 states, have allowed agents to publicly market ‘office exclusives’ without fines, and none of the problems they warn about have happened. If what we are asking for is so bad, why has it worked for years in nearly 30% of the country?”
Specifically, the lawsuit targeting Hive mentions restrictions on showings for “Coming Soon” properties and focuses on governance, describing the MLS as a “contract, combination, or conspiracy of competing agents and brokers.” It also points to Hive’s alleged licensing of data to third parties, something Compass has previously criticized.
“MLSs that are comprised of or governed by brokerages and agents with traditional business models have a strong financial incentive to impair the business models of innovators and mavericks who seek to offer marketing options to homeowners that eschew immediate and automatic sharing of their listings on the MLS regardless of the circumstances or preferences of the homeowner,” the lawsuit says.
Other lawsuits viewed by RISMedia, including complaints against San Diego MLS and REcolorado, appeared to be largely similar, though they incorporated at least some unique elements (for instance, the San Diego MLS suit quotes California law as imparting a fiduciary duty of “utmost care, integrity, honesty, and loyalty” on agents, and notes that the Realtor® associations that previously owned REcolorado specifically cited worries about antitrust scrutiny when they sold the MLS to a private company back in 2024).
The lawsuits were filed right on the heels of Compass’ new Broker-to-Broker Cooperation Policy, which requires all Compass agents to cooperate with other brokers and agents unless otherwise instructed by the client in writing. Compass agents must also adhere to the policy when dealing with listings earmarked as Private Exclusives or Coming Soons.
Background
Compass’ arguments against the 15 MLSs echo closely to the brokerage’s complaint in the ongoing lawsuit against the California Regional Multiple Listing Service (CRMLS), which it sued in mid-October.
Prior to Compass’ complaint, CRMLS took the initiative and sued the brokerage in early October. As outlined in its original complaint, CRMLS is asking a federal judge in New York to declare that the organization’s rules do not violate state and federal antitrust laws.
“The Cooperation Rules are straightforward: they require that when a broker publicly markets a property for sale—that property must also be submitted to the MLS for cooperation with other participating brokers,” CRMLS’ original complaint states. “What the rules do not permit is having it both ways—publicly marketing a property to attract buyers while simultaneously withholding that property from the MLS cooperative and the thousands of other brokers and their buyer clients.”
Compass, meanwhile, alleged that CRMLS’ rules were “illegal” and accused the organization of blocking the brokerage’s “better home marketing product to protect Compass’ competitors from having to compete,” in Compass’ original complaint against CRMLS.
“Instead of fixing its anticompetitive rules, CRMLS has escalated enforcement against Compass: by CRMLS’s own count, roughly a quarter of the CRMLS fines for public marketing in 2026 involve Compass listings,” Compass’ complaint continued.
Since then, several other MLSs have joined CRMLS in their lawsuit, or have filed their own against the mega-brokerage. OneKey MLS joined CRMLS in its legal battle late last month, while Texas-based Unlock MLS released its own letter alleging that Compass had mischaracterized its rules.
This is a developing story. Stay tuned to RISMedia for updates.
Jesse Williams contributed to this reporting.
