CRMLS rejects Compass demands on MLS cooperation rules

The California Regional Multiple Listing Service (CRMLS) has rejected demands from Compass International Holdings to cease enforcing rules that govern when publicly marketed listings must be submitted to the MLS for cooperation. CRMLS is preparing for potential litigation and has initiated an MLS Cooperation Legal Defense Fund to support its stance.

Compass sent a demand letter on September 8, 2026, challenging the MLS's rules concerning public marketing, cooperation, and listings withheld from the MLS. CRMLS, the largest MLS by subscriber count, views this dispute as a critical test of whether large brokerages can use proprietary listing networks and litigation threats to alter cooperation rules. The outcome could significantly impact the visibility of property inventory, determining whether it is accessible through the MLS or kept within brokerage-controlled channels.

CRMLS CEO Art Carter, in an op-ed titled “Cooperation Is Worth Defending,” stated that the MLS system relies on participants both contributing to and benefiting from shared data. He noted that CRMLS Rule 7.9 already permits sellers to authorize full public marketing without submitting a listing for MLS cooperation, a practice Compass refers to as 'office exclusive' inventory. CRMLS contends that its rules prevent scenarios where an agent uses MLS data to secure a listing and set pricing, only to withhold that listing from the MLS while still benefiting from competitor data. CRMLS vice president and general counsel Ed Zorn described this as 'free riding,' echoing concerns from a 1983 Federal Trade Commission report about systematically withholding inventory potentially harming consumers.

CRMLS's response also detailed broader critiques of Compass's business practices, alleging a push towards a 'pay-to-play' framework for listing access. Zorn wrote that Compass aims to control access to its listing information, potentially selling premium feeds to certain portals while excluding others. He cited past discussions with Compass leadership, including CEO Robert Reffkin, about withholding 'Coming Soon' listings from most portals except Redfin. CRMLS argues this model could reduce seller listing exposure, steer consumers to specific platforms, and fragment the market. They also contend that buyers should not have to switch agents to view publicly advertised listings.

CRMLS pushed back against Compass's characterization of its rules, emphasizing that there is no prohibition on public marketing and that existing frameworks allow for multiple listing and distribution choices. Non-exclusive or open listings can be fully marketed publicly without MLS submission if buyer agents have direct access to the seller. CRMLS also noted that agents can join participating neighboring MLSs for access to CRMLS listing content. The MLS alleged that Reffkin has offered financial incentives for agents to leave CRMLS for other MLSs to influence CRMLS policies. CRMLS contrasted Compass's stance in Southern California with its recent settlement with Northwest MLS, where Compass agreed to rules requiring mandatory submission of all for-sale properties with no 'no cooperation' option, suggesting Compass's antitrust arguments against CRMLS's more flexible rules are inconsistent.

Anticipating litigation, CRMLS outlined potential counterclaims, including alleged violations of California's Cartwright Act and unfair competition law. A broad litigation hold was issued, directing Compass and related entities to preserve documents related to marketing programs, misrepresentation claims, dealings with portals, MLS rule communications, off-MLS strategies, and payments to non-Compass licensees. CRMLS intends to gather accounts from buyers, sellers, and agents who claim harm from hidden listings or off-MLS practices, citing reports of buyers needing to abandon representatives to access Compass-controlled properties.

To support its legal efforts, CRMLS is forming the MLS Cooperation Legal Defense Fund, seeking contributions from industry and consumer stakeholders. The fund aims to provide a financial backstop for MLSs facing similar legal threats from large brokerages, preventing them from being compelled to relax cooperation policies due to defense costs.