CRMLS v. Compass — A Briefing for California MLS Leaders, Counsel and Lawmakers

Compass's Nationwide MLS Campaign Series: Predictive Behavioral Economics + Dynamic Game Theory Analysis, With Simulation Predictions for CRMLS v. Compass and State Legislatures

Compass · California Regional Multiple Listing Service · Unlock MLS · Northwest Multiple Listing Service · Zillow · Southern District of New York · California Legislature · State Attorneys General · California · Washington · New York

Companion to Compass Runs the Same MLS Playbook Against CRMLS That It Ran Against NWMLS, Part I of Compass's Nationwide MLS Campaign Series.

Full briefing: https://magazine.mindcast-ai.com/compass-mls-memo

Executive presentation: https://magazine.mindcast-ai.com/Compass-MLS-Outreach-Brief

Compass Accepted Submission in Washington Eight Days Before Demanding Its Removal in California

Compass resolved its federal suit against Northwest Multiple Listing Service (NWMLS) by agreement on August 31, 2026. Every Compass listing still enters NWMLS and reaches more than 30,000 brokers. On September 8, Compass demanded that California Regional Multiple Listing Service (CRMLS) stop enforcing the same submission requirement or face a federal antitrust suit.

CRMLS answered on October 5 by suing Compass first in the Southern District of New York. Case No. 1:26-cv-08796 asks the court to declare CRMLS Rules 7.9 and 7.9.1 lawful under the Sherman Act and California's Cartwright Act.

Central finding. Compass's repeated campaign against multiple listing services (MLSs) produces documents that every targeted institution can compare. Compass's own letters and filings now carry consequences in court. Harm to buyers and a cascade of MLS lawsuits remain open questions the public evidence cannot yet answer.

How Compass's Own Documents Narrow Its Case in New York

Compass's November 2024 letter to CRMLS supported mandatory submission to the MLS without mandatory marketing through it. Robert Reffkin signed the letter, and CRMLS attached it to the complaint as Exhibit D. The 2026 demand drops submission entirely, moving Compass from submission without dissemination to no submission at all.

The Southern District of New York changes the legal ground. Ninth Circuit precedent in PLS.com v. NAR no longer binds the court, and the same district denied Compass's preliminary injunction against Zillow in February 2026. Compass's claims against CRMLS likely become compulsory counterclaims under Federal Rule of Civil Procedure 13(a) in a court Compass did not choose.

Four differences cut against Compass in the comparison with Washington. CRMLS's rule is less restrictive than NWMLS's former rule and offers a non-exclusive route plus a Coming Soon Limited Exposure status built partly at Compass's request. Compass accepted submission from NWMLS eight days before demanding its removal from CRMLS. The pleaded injury amounts to fines, with eight of CRMLS's 89 Rule 7.9 fines in 2025 going to Compass agents. CRMLS also enforces the National Association of REALTORS (NAR) Clear Cooperation Policy, which the Justice Department has said is not anticompetitive standing alone.

Narrative inversion supplies the behavioral mechanism. Compass describes a restraint it imposes as freedom and the same restraint imposed by others as harm. In its suit against Zillow, Compass alleged that restricted listing visibility harms consumers, while a Compass witness in Olympia defended private listings as seller choice. Washington's hearings set the arguments side by side, and Senate Substitute Bill (SSB) 6091 passed 49–0 and 92–1.

Public advertising moved the antitrust question from visibility to access. Compass now advertises office exclusives on a public website, which answers the old complaint about hidden homes. An advertised office exclusive still carries no offer of cooperation to other brokers. Showing logs, offer logs and signed buyer accounts would test whether buyers' brokers lose access, and no forum has examined them.

California law already supplies a drafting path. Civil Code section 1088 lets a seller keep a listing out of the MLS. A conduct rule can leave that right intact and govern what a broker may do once public marketing begins.

What the Full Briefing Adds

The full briefing carries ten Simulation Predictions with probability bands, falsifiers and verification sources: three new from the October 9 simulation and seven carried from MindCast's October papers. Six foundation sections cover the Exhibit D analysis, the four Washington comparisons and six questions a state attorney general office can answer from listing histories and showing logs. The briefing also drafts three statutory protections and six limits for a California bill. A catalogue tracks Compass's positions across courts, legislatures, investor calls and marketing. Four decision maps address CRMLS leadership, CRMLS counsel, other California MLS executives and California lawmakers. Eleven linked MindCast publications trace the evidence from January through October 2026.

Read the full briefing and all ten Simulation Predictions: https://magazine.mindcast-ai.com/compass-mls-memo

Simulation Predictions Show a Narrow Case and a Continuing Campaign

The October 9 simulation released three new Simulation Predictions. Court dockets and party announcements verify each one.

·       Compass's Unlock complaint skips its own praise of Flex (54–70%). Compass's first complaint against Unlock MLS cites the NWMLS agreement or the number of MLSs permitting public marketing and does not address its March 2026 praise of Flex, by December 31, 2026. Falsifier: the complaint addresses the praise directly. Void if Compass files no complaint by that date.

·       CRMLS v. Compass does not end early (80–91%). No stipulated dismissal or announced resolution ends the case before March 31, 2027. Falsifier: any such resolution inside the window.

·       Compass argues seller choice instead of inadequate alternatives (60–74%). Compass's first substantive New York filing frames the dispute as seller choice and does not argue that Rule 7.9's non-exclusive route or Limited Exposure status fails as an alternative, by December 31, 2026. Falsifier: the filing argues those alternatives are inadequate.

Every Simulation Prediction carries a deadline, a falsifier, an activation rule and a public verification source. The full briefing holds ten in total. The simulation declines to predict that a second California MLS will sue Compass, since two public refusals mark observations rather than a tipping point.

Stakeholder Decisions and Risk Mitigation

Each institution facing Compass holds a different decision. The callouts below run from the closest decision to the most distant.

CRMLS Counsel. The Exhibit D argument rests on the line between submission without dissemination and no submission. Risk mitigation: anchor each comparison in Compass's signed letters and filings, which outweigh any account of a meeting.

CRMLS Leadership. Filing first left the counterclaim decision open: amend with reserved claims, pursue conduct discovery or hold the narrow counts. Risk mitigation: test each option against Compass's likely response and the defense fund's real depth before Compass files its own suit.

Other California MLS Executives. Every board holding a Compass letter faces the decision CRMLS and Unlock faced, and each board decides alone. Risk mitigation: avoid agreements among MLSs on how to answer Compass, since such agreements carry Sherman Act group-boycott exposure. Joint petitioning of state officials stays protected under the Noerr-Pennington doctrine.

State Attorney General Offices. Six questions answerable from listing histories, showing logs and offer logs frame an access inquiry. Risk mitigation: open with a preservation demand, which commits the office to no filing and stops ordinary retention from erasing the logs.

California Lawmakers and Committee Staff. Washington's statute reached visibility, while California's dispute concerns showings and buyer representation. Risk mitigation: write access language into the first bill, since adding it later costs a hearing or a legislative year.

Brokers Representing Buyers. Buyers' brokers hold the evidence no forum has examined. Risk mitigation: document any refused showing or any condition requiring a buyer to drop representation, in writing and on the date it occurs.

Compass's Washington Agreement Now Works Against It in California

The eight days between the NWMLS agreement and the CRMLS demand now sit in a federal complaint. Compass accepts mandatory submission when litigation cost rises, and CRMLS chose a court where Compass must explain that history. Whether the contradiction reaches buyer access and other MLSs depends on evidence no institution has yet demanded.

Working With MindCast

MindCast AI is a Predictive Behavioral Economics + Dynamic Game Theory firm. MindCast AI applies Predictive Behavioral Economics + Dynamic Game Theory through MindCast AI Proprietary Cognitive Digital Twin Foresight Simulations (MP CDT FS). Behavioral Economics supplies the decision rules. Game Theory supplies the payoff structure. Predictive simulations emerge from the combination.

A commissioned simulation builds your institution's Cognitive Digital Twin (CDT) from its own rules, budget and correspondence with Compass, then replays the contest against your options. Engagements cover litigation posture across New York, Texas and Washington. Boards can test responses to Compass demands, and drafters can test MLS rules or statutory language against the opt-out and privacy-exception requests Washington drew. Contact [email protected].

https://www.mindcast-ai-simulation.com

Related Works

MCAI Economics Vision: CRMLS v. Compass — A Briefing for California MLS Leaders, Counsel and Lawmakers
https://magazine.mindcast-ai.com/compass-mls-memo

Companion Magazine Brief
https://magazine.mindcast-ai.com/Compass-MLS-Outreach-Brief

MLS Equilibrium Series
https://www.mindcast-ai.com/p/mls-equilibrium-series

Compass Runs the Same MLS Playbook Against CRMLS That It Ran Against NWMLS
https://www.mindcast-ai.com/p/compass-mls-offensive-crmls-declaratory-action

Compass Private Listings Are Now Public and Access Is the Antitrust Question
https://www.mindcast-ai.com/p/compass-self-inflicted-antitrust-scrutiny

California Private Listing Law After Washington SSB 6091
https://www.mindcast-ai.com/p/compass-crmls-litigation-threat

Compass's Cross-Forum Contradictions
https://www.mindcast-ai.com/p/compass-narrative-contradictions

The Compass Narrative Inversion Playbook
https://www.mindcast-ai.com/p/compass-narrative-inversion-playbook

How Compass's State Legislative Testimony Undermined its Federal Antitrust Claims
https://www.mindcast-ai.com/p/compass-state-leglislature-failure

The Compass–Zillow Antitrust Litigation Arc Is Closed
https://www.mindcast-ai.com/p/compass-drops-zillow-lawsuit

The Compass–NWMLS Settlement Changed the Private Governor After Washington Changed the Governing Law
https://www.mindcast-ai.com/p/compass-nwmls-settlement

The Motion Compass Filed and the Architecture It Could Not Address
https://www.mindcast-ai.com/p/compass-motion-to-dismiss

How State Attorney General Coalitions Form, Grow, and Hold
https://www.mindcast-ai.com/p/ag-coalition-propagation

State AG Coalitions in the Landscape of Emerging Federalism
https://www.mindcast-ai.com/p/ag-coalitions-federalism