Compass Sues CRMLS Over Fines for Marketing Listings Off-MLS

What happened

On October 16, 2026, Compass filed an antitrust lawsuit against California Regional Multiple Listing Service (CRMLS), which Compass calls the nation's second-largest MLS. According to Compass, CRMLS fines agents up to $2,500 when they follow a client's lawful instructions to publicly market a property outside CRMLS. In some cases, Compass says, agents can be suspended or expelled. Compass also points out that builders and developers aren't subject to these policies.

Compass says it will pay all CRMLS fines of this kind for agents at its company-owned brokerages (Coldwell Banker Realty, Compass and Sotheby's International Realty) when the marketing was done at the client's written direction. To qualify, agents must submit the fine notice and assign their right to sue CRMLS to Compass. Compass is asking the court for an order ending the rules and for damages, which it notes antitrust law automatically triples. HousingWire reported that the move "could reshape how far MLS cooperation rules can go nationwide."

The CRMLS suit isn't the only dispute. Unlock MLS in Central Texas says Compass sent it a letter threatening a federal antitrust suit, and it understands that Compass has sent similar demand letters to many MLSs. On October 20, OneKey MLS, which covers New York City, Long Island and the Hudson Valley, publicly rejected Compass's demand to change its rules.

Why it matters for agents

Enforcement of these rules differs a lot from one MLS to the next. Compass says MLSs serving more than 350,000 brokers and agents in at least 12 states don't penalize off-MLS public marketing. Unlock MLS says a Clear Cooperation Policy violation in its market brings a single $100 fine, at most $500 after a hearing, and no suspension. It says no subscriber has ever needed a hearing for a CCP violation. Know your own MLS's rules before you agree to a marketing plan with a seller.

Both sides are making arguments you'll likely hear from clients. OneKey cites a Bright MLS and Drexel University study finding that homes marketed openly on the MLS sell for 17.5% more than comparable off-market properties. It also cites Zillow research finding that New York sellers who went off-market lost a median of $13,749 per home. OneKey adds that Senators Elizabeth Warren and Cory Booker urged the FTC to investigate private listing practices. Compass argues that only the law and the homeowner should decide how a home is marketed.

Some MLSs offer middle-ground options. Unlock MLS's Flex lets agents market a listing privately inside the MLS without public internet display or accumulating days on market. The MLS says nearly three in four Flex listings later moved to full exposure.