Compass Runs the Same MLS Playbook Against CRMLS That It Ran Against NWMLS — CRMLS Broke It by Suing First in New York

CRMLS Took the Initiative and the Forum, and Compass's MLS Campaign Grew Costlier

Compass, Inc. · California Regional Multiple Listing Service · Northwest Multiple Listing Service · National Association of REALTORS · California Association of REALTORS · U.S. District Court for the Southern District of New York · Ninth Circuit · California · Washington · New York

Opens Compass's Nationwide MLS Campaign series and tests the Simulation Predictions MindCast published on October 2 in California Private Listing Law After Washington SSB 6091 — Broker Conduct Rules for Listing Visibility, Showing Access and Buyer Representation.

Full publication: https://magazine.mindcast-ai.com/rs-compass-mls-offensive-crmls-declaratory-action

The California Regional Multiple Listing Service (CRMLS) sued Compass in Manhattan on October 5, 2026. Manhattan hosts Compass's headquarters and the federal court where Compass sued Zillow in 2025. Compass had given CRMLS until 5:00 PM Eastern on October 6 to stop fining agents for publicly marketed office exclusives or face a federal antitrust suit.

CRMLS filed first and chose Compass's home court. CRMLS, the largest Multiple Listing Service (MLS) in the country, asks the court to declare its Rules 7.9 and 7.9.1 lawful under the Sherman Act and California's Cartwright Act.

Central finding. Compass wins rule changes from listing services by holding the initiative, and CRMLS took the initiative away. MindCast's simulation expects the New York forum to hold at 79–88% and Compass's campaign to continue against other listing services at 69–84%. Compass's commercial conduct enters the New York case at only 37–46%.

California's Largest Listing Service Took the Initiative, the Forum and Compass's Own Words

Compass's playbook depends on controlling timing and forum, and CRMLS's filing took both. Six mechanisms show how CRMLS moved the contest onto its own terms.

Compass's playbook runs four steps: a private demand, a public deadline, a threatened antitrust suit and a negotiated rule change. Compass won a new listing status from the Northwest Multiple Listing Service (NWMLS) on August 31, 2026 after sixteen months in which Compass chose every move. Compass renewed its demand against CRMLS eight days later and told more than 900 MLS executives on September 30 that suits would begin in mid-October.

CRMLS's own enforcement figures size the fight. CRMLS issued 89 fines under Rule 7.9 in 2025, and Compass agents drew 8 of them. In 2026 Compass listings appear in about 75 of roughly 300 cases, more than five times the combined Compass and Coldwell Banker share of CRMLS subscribers. Compass's stake lies in the rule change rather than the fines.

Manhattan removes the precedent Compass built its theory on. PLS.com v. NAR (9th Cir. 2022) binds every California federal court and carried Compass past NWMLS's motion to dismiss in Seattle. In the Second Circuit the case persuades at most, and the Southern District already denied Compass a preliminary injunction against Zillow on February 6, 2026 while crediting the free-riding rationale behind cooperation rules.

Federal Rule of Civil Procedure 13(a) likely turns Compass's antitrust claims against CRMLS into compulsory counterclaims in New York. Compass can still sue in California and ask New York to dismiss. A motion to dismiss would ask a court to send a New York company's dispute out of New York.

Exhibit D puts Compass's own words against its current demand. Robert Reffkin's November 2024 letter offered CRMLS three options and stated that all three support mandatory submission to the MLS. Compass's 2026 demand drops submission entirely. Complaint paragraph 61 adds that Compass accepted mandatory submission in its NWMLS agreement eight days before demanding CRMLS abandon it.

Compass offers two public answers. Compass cites MLSs serving more than 350,000 agents across twelve states that already permit public marketing of office exclusives. Reffkin also points to a 2018 CRMLS seller form that allowed marketing before submission, but CRMLS adopted Rules 7.9 and 7.9.1 in May 2020 to end that practice. The 2018 form documents the problem the rules address rather than an earlier version of them.

Rule 7.9 lets a seller and broker hold any two of three rights: an exclusive listing agreement, public marketing and withholding the listing from the cooperative. A non-exclusive route permits public marketing without submission. CRMLS built a Coming Soon Limited Exposure status at Compass's request, and the status keeps a listing off Zillow and other portals while every CRMLS broker sees it. Compass demands all three rights at once, so the residual demand reduces to one: marketing to the public while withholding access from other brokers.

Washington and California differ in four ways, and each difference favors CRMLS. NWMLS banned office exclusives outright while CRMLS offers a non-exclusive route. Compass pleaded a suspended data feed in Washington but can plead only fines in California. CRMLS also enforces the National Association of REALTORS cooperation policy, which the Justice Department has said is not anticompetitive standing alone.

CRMLS raised the cost of Compass's campaign without ending it. Every new suit must survive comparison with the positions Compass takes in New York. MindCast therefore expects Compass's next defendant to run a rule resembling NWMLS's old outright ban, where Compass can plead a horizontal boycott without conceding that less restrictive alternatives exist.

Twelve Simulation Predictions Carry the Case Through 2027

The New York docket now resolves new and previously published Simulation Predictions alike. The full publication states each entry with its window, trigger and falsifier.

The full paper carries twelve Simulation Predictions: seven new entries on the New York case and five October 2 entries that now resolve against it. Bands run from 32–43% to 82–92%. Four scenario routes carry weights through 2027, led by a modal path at 47–59% in which Compass contests the forum, loses and stays.

The full publication compares the playbook's six moves across Washington and California and reads four Compass-sourced documents against the complaint. Eight institutions enter the simulation, four as Cognitive Digital Twins (CDTs), and nine monitoring signals tie every entry to docket 1:26-cv-08796. Three resolution rules state which filings satisfy the published entries, and four watch conditions name the events that would produce new ones.

Read the full analysis with every scenario route and stakeholder time gate: https://magazine.mindcast-ai.com/rs-compass-mls-offensive-crmls-declaratory-action

Seven Simulation Predictions lead.

• P-1 · Compass contests the forum before pleading (62–75%). Compass's first substantive filing in 1:26-cv-08796 is a motion to dismiss, stay or transfer rather than an answer with counterclaims by December 31, 2026.

• P-2 · The Southern District keeps the case (79–88%). No order dismisses or transfers the action on forum grounds through June 30, 2027.

• P-3 · Compass's conduct becomes a disputed fact (37–46%). A CRMLS filing puts the Redfin arrangement, representation conditions or showing access before the court by June 30, 2027.

• S-1 · Compass's claims arrive first as New York counterclaims (66–76%). If Compass asserts antitrust claims against CRMLS anywhere, Compass asserts them first as counterclaims rather than in a standalone complaint through March 31, 2027.

• S-3 · Compass sues another MLS (69–84%). Compass files an antitrust complaint against at least one MLS other than CRMLS by December 31, 2026.

• California S-4 · CRMLS keeps its rules (82–92%). CRMLS does not amend its rules to permit public marketing of an exclusive listing without MLS submission through June 30, 2027.

• California S-1 · A named institution funds the CRMLS defense (64–80%). A named institution publicly commits money to the MLS Cooperation Legal Defense Fund by March 31, 2027.

P-3 sits below even odds because CRMLS holds three responses once Compass counterclaims. CRMLS can amend with its reserved claims, pursue conduct evidence through discovery or keep its narrow counts. Every Simulation Prediction carries a deadline, a falsifier, an activation trigger and a public verification source.

Six Audiences Decide Before Compass's First Filing

Six audiences across MLS governance, advocacy, law and enforcement each face one decision the New York case now dates. Each callout names the decision and the move that limits exposure.

🗂 MLS Boards. Every board holding a Compass demand letter sits at step one of the playbook, and S-3 says the campaign continues. A board with a non-exclusive route and a Limited Exposure equivalent carries less exposure than one with an outright ban. Risk mitigation: enter the board's vote on the letter in the minutes and reserve litigation funds in the 2027 budget, since a concession before P-1 resolves gives up the leverage the New York filing created.

🤝 REALTOR Associations. CRMLS has asked the California Association of REALTORS (C.A.R.) and the National Association of REALTORS (NAR) for legal-program funding. Risk mitigation: decide the request before Compass's first New York filing, because the fund's first use will likely defend the forum rather than the rule.

⚖️ Brokerage Counsel. P-3 below even odds means the buyer-access allegations may never become a contested issue in New York. Risk mitigation: issue preservation notices now covering showing and offer communications on Compass listings, so privately held evidence stands on its own.

⚖️ MLS Counsel. CRMLS's complaint supplies a portable structure of narrow counts, exhibits in Compass's own words and reserved claims held back. S-2 at 32–43% says CRMLS will probably not deploy its seven reserved claims within 60 days of any Compass counterclaims, so the reserve works as leverage. Risk mitigation: hold conduct claims until Compass commits to a forum.

💼 Brokers. CRMLS's rules hold through June 2027, and both routes to public marketing outside full cooperation exist today. Risk mitigation: audit active exclusive listings against Rule 7.9 and offer sellers the non-exclusive and Limited Exposure options before fines accrue.

🏛 State Regulators and Lawmakers. The complaint and Exhibit C place buyer-access allegations before a federal court that will probably not reach them before June 2027. Risk mitigation: send Compass a preservation demand covering listing histories, showing logs and offer logs, which commits no office to a filing.

Each stakeholder move belongs to one institution and waits on neither Compass nor the court.

CRMLS Took Both Choices the Playbook Needs

CRMLS's October 5 filing in Manhattan answers the playbook directly. Compass's sequence works only while Compass picks the timing and the forum, and CRMLS took both one day before Compass's deadline. Compass promised its own suit soon, and every MLS suit that follows now carries a forum Compass did not choose and a 2024 letter Compass wrote.

Working With MindCast

MindCast AI is a Predictive Behavioral Economics + Dynamic Game Theory firm publishing in two series, MCAI Economics Vision and MCAI Lex Vision.

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 one institution's CDT from its own documents and tests its options against the New York contest. Four engagements follow from the paper: an MLS board's answer to its own demand letter; an association's funding decision; brokerage counsel's preservation and pleading posture; and a state office's evidence plan. Contact [email protected] to schedule a scoped diagnostic session.

Related Works

• MCAI Lex Vision: Compass Runs the Same MLS Playbook Against CRMLS That It Ran Against NWMLS — CRMLS Broke It by Suing First in New York. The full publication carries all twelve Simulation Predictions, four scenario routes and the stakeholder time gates.

• California Private Listing Law After Washington SSB 6091 — Broker Conduct Rules for Listing Visibility, Showing Access and Buyer Representation. The paper supplies four published Simulation Predictions applied here and proposes a California conduct statute.

• Compass Private Listings Are Now Public and Access Is the Antitrust Question — A Briefing for MLS Leaders and REALTOR Associations. The paper separates visibility from broker access and supplies the Access P-2 entry.

• Compass Renews Its Own Antitrust Scrutiny. The corporate-site summary covers both October 2 papers.

• Compass Private Listings Behind the Discovery Wall. The paper shows which buyer-capture variables NWMLS tested in discovery.

• Compass' Strategic Antitrust Forum Shopping v. NWMLS and Zillow. The paper set out the venue-fragmentation strategy that CRMLS's filing reverses.

• Compass's Cross-Forum Contradictions. The paper shows how positions built for separate audiences fail once an opponent compares them.

• The Compass–NWMLS Settlement Changed the Private Governor After Washington Changed the Governing Law. The paper shows how Compass won a marketing accommodation while mandatory submission survived.

• How the Zillow Complaint Reframes Compass v. NWMLS as a National Coordination Case. The paper documents the October 2025 demand campaign across eight MLSs.

• The MindCast MLS Equilibrium Series. The series explains which MLSs resist Compass and supplies the cross-forum tests the paper applies.

• The Skillman Moment as Analytical Rosetta Stone of the MindCast MLS Equilibrium Series. The paper defines the test that Exhibit D completes in federal court.