Thesis. Compass wins rule changes from listing services by holding the initiative: a private demand, a public deadline, a threatened suit and a negotiated agreement. CRMLS took the initiative on October 5 by suing first in Compass’s home court, and the simulation expects the forum to hold, Compass’s conduct to stay out of the case and Compass’s campaign to continue against other listing services.
Related works. California Private Listing Law After Washington SSB 6091 supplies the Simulation Predictions on a Compass suit that this filing now tests. Compass’ Strategic Antitrust Forum Shopping v. NWMLS and Zillow set out the venue strategy CRMLS’s filing reverses. Compass’s Cross-Forum Contradictions explains why Compass’s own 2024 letter now works against it. The paper opens Compass’s Nationwide MLS Campaign series and builds on The MindCast MLS Equilibrium Series.
Why now. Compass’s deadline expires at 5:00 PM Eastern on October 6, Compass has said its own suit against CRMLS comes within weeks and every MLS holding a Compass letter decides its own response in the same window. Five audiences each face one decision this paper dates, from MLS boards and REALTOR associations to counsel and state enforcers.
I. Executive Summary
Compass runs one playbook against listing services, and CRMLS broke its opening sequence by suing first. The playbook is a private demand, a public deadline, a threatened antitrust suit and a negotiated rule change. The sequence won Compass a new listing status from the Northwest Multiple Listing Service (NWMLS) in August 2026 because Compass held the initiative at every step.
On October 5, 2026 the California Regional Multiple Listing Service (CRMLS) took the initiative away by filing a declaratory judgment action in Compass’s home district one day before Compass’s own deadline. The simulation reads what follows as a procedural contest Compass will probably lose and a conduct contest that will probably not begin, while Compass’s wider campaign continues against other listing services.
The filing is CRMLS v. Compass, Inc., No. 1:26-cv-08796 (S.D.N.Y.), announced in a CRMLS press release the same evening. 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. Compass’s antitrust claims against CRMLS now likely count as compulsory counterclaims in a court Compass did not choose, outside the Ninth Circuit where Compass won its only ruling.
CRMLS gained three things. CRMLS seized the initiative, and CRMLS chose a focused question by asking only whether its submission rules are lawful while holding seven broader claims in reserve. CRMLS also put Compass’s own documents into play.
Compass’s November 2024 letter, filed as Exhibit D, supports mandatory submission to the MLS and opposes only mandatory marketing through it. Compass’s 2026 demand drops submission altogether. Compass can distinguish the letter, and Compass has to explain the change in every forum where it sues.
The dispute reduces to three rights: an exclusive listing agreement, public marketing and withholding the listing from the cooperative. CRMLS allows any two, through a non-exclusive route and a Coming Soon Limited Exposure status that keeps a listing off portals while every broker sees it. Compass demands all three at once. What remains of Compass’s demand is the right to market publicly while withholding broker access.
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.
Compass, CRMLS, the court and the peer MLS boards each become a Cognitive Digital Twin (CDT) with their own incentives and decision rules.
The framework is The MindCast MLS Equilibrium Series, which in May 2026 documented Compass’s demand campaign across eight MLSs and set out the tests this paper applies. MindCast published two papers on the dispute on October 2, three days before the filing, and their Simulation Predictions resolve against a case Compass did not start.
Simulation Prediction Highlights
Seven Simulation Predictions on the New York case appear in Section III beside five published entries. Four lead.
P-1 · Simulation Prediction: Compass’s first substantive filing is a motion to dismiss, stay or transfer rather than an answer with counterclaims · Window: Through the responsive-pleading deadline; outer gate December 31, 2026 · Band: 62–75%
P-2 · Simulation Prediction: The Southern District retains the case with no dismissal or transfer on forum grounds · Window: Through June 30, 2027 · Band: 79–88%
P-3 · Simulation Prediction: A CRMLS filing puts the Redfin arrangement, representation conditions or showing access before the court as a disputed fact · Window: Through June 30, 2027 · Band: 37–46%
S-3 · Simulation Prediction: Compass files an antitrust complaint against at least one MLS other than CRMLS · Window: Through December 31, 2026 · Band: 69–84%
The forum will probably hold and the campaign will probably continue. Whether Compass’s conduct enters this case sits below even odds, because CRMLS holds three responses at the counterclaim node and amending with its reserved claims is only one of them. The access question is what the case can test rather than what it will test. A Compass counterclaim in New York does not satisfy the two published entries that require Compass to file a complaint.
CRMLS raised the cost of Compass’s campaign without ending it. Each new suit must now survive comparison with the positions Compass takes in New York, so the expected next target is a listing service whose rule looks like NWMLS’s old ban rather than CRMLS’s. Section III carries that as a watch condition and Section V explains the mechanism.
Stakeholder Readout
🗂 MLS Leaders: every MLS holding a Compass demand letter is at step one of the same playbook, and S-3 at 69–84% says the campaign continues. First move: the board decides by its next meeting whether its letter gets a court answer, a fund contribution or a concession, and a board with a non-exclusive route and a Limited Exposure equivalent reads its own exposure as lower.
🤝 REALTOR Associations: CRMLS has requested money from the legal programs of the California Association of REALTORS (C.A.R.) and the National Association of REALTORS (NAR). First move: decide the funding question before Compass’s first New York filing, which P-1 expects to be a forum motion.
⚖️ Counsel: Compass’s claims against CRMLS likely arrive as compulsory counterclaims, and P-3 at 37–46% means the access allegations may never become a contested issue in this case. First move: brokerage counsel issue preservation notices covering showing and offer communications on Compass listings; MLS counsel copy CRMLS’s structure of narrow counts, exhibits in Compass’s own words and reserved claims held back.
🏛️ Regulators and Lawmakers: the complaint and Exhibit C place buyer-access allegations before a federal court that will probably not reach them inside the window. First move: a preservation demand to Compass before showing and offer logs age out.
💼 Brokers: CRMLS’s rules hold through June 2027 at 82–92%, and both routes to public marketing outside full cooperation exist today. First move: audit active exclusive listings against Rule 7.9 and offer sellers the non-exclusive and Limited Exposure options.
II. The Dispute and Its Simulation Fit
Compass ran its playbook in Washington from early 2025 to August 2026 and started it again in California in September. The 119 pages CRMLS filed on October 5 contain the playbook’s six moves, the rights it attacks, the prior positions it left behind and the forum choice that broke it. Eight institutions will decide what happens next, and each one faces a different first move.
A. Current State: Two Letters, a Refusal and a Filing
Compass made the same demand of CRMLS twice, in November 2024 and September 2026. CRMLS refused both times, and the second refusal arrived in court five days later. The complaint and its five exhibits document those exchanges.
Compass first demanded a rule change from CRMLS in November 2024. Robert Reffkin’s letter to the CRMLS board offered three options and closed by stating that all three support mandatory submission to the MLS. CRMLS declined on December 3, 2024, citing antitrust exposure to buyers and their brokers.
Compass renewed the demand on September 8, 2026, eight days after its August 31 agreement with NWMLS. Outside counsel Nathan Eimer’s demand letter gave CRMLS until 5:00 PM ET on October 6 to confirm it would stop fining agents for publicly marketing office exclusives. The letter promised a federal antitrust suit otherwise, copied the Department of Justice (DOJ) and the Federal Trade Commission (FTC), and attached a document preservation notice.
CRMLS refused on September 30. General Counsel Ed Zorn’s letter, now Exhibit C, said Rule 7.9 already allows public marketing without submission under a non-exclusive listing. The letter listed seven claims CRMLS would bring if sued and announced the MLS Cooperation Legal Defense Fund.
Reffkin answered the same day at the Council of Multiple Listing Services conference in Fort Lauderdale. He told more than 900 attendees that Compass would begin suing MLSs in mid-October and would not resolve the suits by agreement. The complaint quotes the remarks at paragraph 9.
CRMLS filed five days later. Compass answered through a spokesperson on October 6 that the suit is without merit, that Compass will defend it and that Compass plans to file its own lawsuit against CRMLS soon. A promised suit establishes no filing, venue or counterclaim posture, and the October 6 reporting reviewed had not identified a Compass filing. Reffkin had written on LinkedIn over the weekend that the Compass complaint would come “in the next few weeks,” as Inman reported.
The complaint pleads two counts, a declaration under the Sherman Act and a declaration under the Cartwright Act, and asks for an injunction against any Compass suit over the rules. None of the seven claims from Zorn’s letter appears as a cause of action.
The compliance figures in paragraph 59 of the complaint size the fight. CRMLS issued 89 fines for Rule 7.9 violations in 2025, 8 of them against Compass agents. In 2026 about 75 of roughly 300 cases involve Compass listings. Compass and Coldwell Banker together hold about 4.5% of CRMLS subscribers, so Compass listings appear in Rule 7.9 cases at more than five times the combined firm’s share of the membership this year.
Compass’s economic stake lies in the value of the rule change rather than in the fines. CRMLS’s stake lies in the cooperative itself. Both sides litigate over control of a rule, and the dollar amounts in dispute will not decide when either side stops.
🗂 MLS Leaders: the complaint is 37 pages and the exhibits run 82 more. The exhibits carry the evidence that boards will need, and Section II.B shows that most of it already surfaced in Washington.
B. The Playbook: Six Moves Compass Ran in Washington and Repeats in California
Compass’s playbook is the sequence of a private demand, a public deadline, a threatened antitrust suit and a negotiated rule change. Compass ran it against NWMLS from early 2025 and started it against CRMLS on September 8, 2026. The two runs share theory, authorities, vocabulary and sequence. Each of the four differences described below favors CRMLS.
The NWMLS and CRMLS runs sit inside a wider campaign. Zillow’s May 2026 complaint against Midwest Real Estate Data documented demand letters from Reffkin to at least eight MLSs in October 2025, with MRED, RealTracs and CLAW adopting the demanded rules.
MindCast’s How the Zillow Complaint Reframes Compass v. NWMLS as a National Coordination Case analyzed that campaign when the complaint surfaced it. The paper matters here because it showed that NWMLS was refusing a national program other MLSs accommodated, which is the position CRMLS now occupies. The MLS Equilibrium Series tied each response to governance: MLSs with a brokerage ownership tier and Compass-affiliated board seats accommodated, and the one-member-one-vote cooperative in Washington refused. CRMLS is an association-owned mutual benefit corporation with no brokerage ownership tier, and its refusal follows the pattern.
The theory. Both treat the MLS as a combination of competing brokers dictating how other competitors may compete. Both plead a Sherman Act restraint on marketing conduct framed as a group boycott. Both argue that MLS membership is a requirement of trade, and that fining a broker for a yard sign or a website reaches conduct off the platform.
The target. Both attack the moment when public marketing triggers mandatory submission. NWMLS required every listing to enter the MLS before any marketing. CRMLS Rule 7.9 requires submission within one business day of public marketing for listings under exclusive agreements. Compass calls both a ban on office exclusives.
The authorities. The CRMLS letter reuses the Washington citation set: the FTC’s Fourteen Points, the 1983 Butters Report, Realcomp II v. FTC, PLS.com v. NAR and the DOJ consent judgments from Ethan Glass’s years at the Antitrust Division. The 1000WATT seller survey appears in the November 2024 letter and in Compass’s Washington advocacy.
The vocabulary. Seller choice and the agent’s fiduciary duty under state law carry both campaigns. The November 2024 letter says CRMLS is “asking agents to break the law.” Compass made the same argument to Washington legislators on SSB 6091, which passed 49–0 and 92–1.
The sequencing. A private demand leads to a public refusal and a deadline. A threat of suit follows, and litigation serves as leverage for a rule change. Compass sued NWMLS in April 2025 after NWMLS declined its demands and suspended Compass’s data feed. The CRMLS sequence runs from the November 2024 letter through the October 6 deadline.
The response template. NWMLS answered Compass with counterclaims alleging a deceptive three-phase marketing program and asked for a declaration that its rules are lawful. CRMLS ported that template and filed it before Compass could sue. Zorn’s preservation notice names the same three-phase materials and the same days-on-market and list-to-sold ratios that NWMLS pursued in discovery.
Four differences cut against Compass.
The rule is less restrictive. NWMLS banned office exclusives outright and offered no non-exclusive route. CRMLS permits them under Rule 7.9.1, exempts non-exclusive listings and offers the Limited Exposure status. Compass’s letter calls its CRMLS claim “even stronger” than the Washington claim. The rules point the other way.
The precedent reversed. Compass accepted an NWMLS regime under which every listing still enters the MLS before public marketing. NWMLS’s rules after the August 31 agreement are stricter than CRMLS’s rules today, and the complaint pleads the point at paragraph 61.
The injury is thinner. In Washington, Compass pleaded a concrete injury from the suspended feed. In California the pleaded harm is fines, eight of them in 2025. Compass’s stake is the strategic value of the rule change, which is harder to plead as antitrust injury.
NAR is in the frame. NWMLS is broker-owned and outside NAR, so Compass could argue monopoly power without a national policy behind the rule. CRMLS enforces NAR’s Clear Cooperation Policy, so Compass’s letter has to preempt a “blaming NAR” defense while CRMLS can cite the Justice Department’s statement in Nosalek that cooperation policies standing alone are not anticompetitive.
Compass reads the Washington outcome as a template that forced a rule change within five months of surviving dismissal. CRMLS reads the same outcome as proof that Compass accepts mandatory submission when it has to. The court will read the agreement’s text, which kept submission.
🤝 REALTOR Associations: the NWMLS counterclaims and the CRMLS complaint share a theory and an evidence list. Money committed to the CRMLS defense fund supports the same arguments any MLS will need against the same demand letter.
C. What the Playbook Attacks: Three Rights and One Word
Compass and CRMLS use the phrase office exclusive to mean different things, and the difference decides the case. Under the vocabulary, the dispute is about three rights a seller and broker can hold. CRMLS’s rules grant every combination except the one Compass demands.
Compass’s demand letter rests on history. Compass argues that from 1971 to 2025 an office exclusive meant a listing withheld from the MLS and freely marketed in public. NAR’s August 2025 definition, in Compass’s account, rewrote 50 years of practice.
CRMLS refuses the term. The complaint calls the category a No Cooperation Listing and says Compass “mistakenly” uses the phrase office exclusive. If the court adopts CRMLS’s vocabulary, Compass’s history argument loses its connection to the rules in dispute.
Rule 7.9 lets a seller and broker hold any two of three rights. Exclusivity plus public marketing requires submission to the MLS. Public marketing without submission requires a non-exclusive listing. Exclusivity without submission requires a No Cooperation Listing with no public marketing.
Compass demands all three. CRMLS’s less restrictive alternatives are the other two combinations, and the complaint names them at paragraphs 45 through 47 and 81.
CRMLS has also separated portal exclusivity from broker access. At Compass’s request, CRMLS built a Coming Soon Limited Exposure status that keeps a listing off Zillow and other portals while every CRMLS broker sees it. Complaint paragraphs 51 and 59 describe the status and the enforcement pause CRMLS granted while Compass learned it.
The Limited Exposure status isolates what remains of Compass’s demand. A seller can already limit portal exposure without leaving cooperation. The residual demand is the right to withhold broker access while marketing to the public, and broker access is the question MindCast’s Compass Private Listings Are Now Public and Access Is the Antitrust Question identified on October 2. The paper matters here because the New York complaint moves that question into a court.
💼 Brokers: CRMLS permits public marketing without submission under a non-exclusive agreement, and limited portal exposure with submission under Coming Soon Limited Exposure. Both options exist today.
D. What the Playbook Left Behind: Compass’s Own Words as Exhibits
Four documents in the complaint came from Compass or from a company Compass now owns. Each converts a statement made in a forum Compass controlled into evidence in a forum it does not, and the strongest is Compass’s own letter from November 2024. Compass can distinguish that letter, and the paper states the distinction precisely below.
Exhibit D. Reffkin’s November 2024 letter offered three options: the Bright MLS approach to office exclusives, a modified Coming Soon status and a private listing network. The letter said the Bright approach puts office exclusives directly into the MLS and that all three options “support the concept of mandatory submission to the MLS, but not mandatory marketing through the MLS.” Every 2024 option kept submission. The 2026 demand drops it.
Exhibit C. Zorn’s letter recounts meetings in which Reffkin said no buyer agent should lose a client over a listing the buyer could see but the agent could not. The letter also describes Reffkin’s request to withhold Coming Soon listings from every portal except Redfin, so Compass could sell exclusive access. Complaint paragraph 41(f) repeats the Redfin allegation on information and belief.
Anywhere’s annual report. Anywhere Real Estate warned in its 2024 Form 10-K that weaker cooperation rules could reduce broadly listed inventory and limit access to market data. Compass closed its acquisition of Anywhere in January 2026, so the warning now reads as a statement by a Compass company. Compass acquired Anywhere’s disclosures along with its brokerages, and CRMLS pleads one of them at paragraph 42.
The NWMLS agreement. Compass’s demand letter cited its Washington suit as precedent. Complaint paragraph 61 answers that the August 31 agreement kept NWMLS’s requirement that a listing enter the MLS before public marketing. Compass accepted a stricter rule in Washington eight days before demanding a looser one in California.
MindCast’s The Compass–NWMLS Settlement Changed the Private Governor After Washington Changed the Governing Law explains the agreement. The paper matters here because it shows how Compass obtained a marketing accommodation while mandatory submission survived, which is the same distinction Exhibit D draws.
Exhibit D’s contradiction needs precise statement. Compass’s 2024 Bright option asked for public marketing of office exclusives with seller consent, which resembles the 2026 demand. The difference is submission: Bright-style office exclusives are filed with the MLS without dissemination, and the 2026 demand requires no filing at all. Compass moved from submission without dissemination to no submission.
Compass has two public answers. The first is scale: its demand letter and its October 6 statement say that MLSs serving more than 350,000 agents across twelve states already permit public marketing of office exclusives, a figure the paper treats as Compass’s claim. The second is history: Reffkin’s weekend post, reported by Inman, points to a 2018 CRMLS seller form that let a seller instruct the broker to market the property without submitting the listing until a stated date.
The 2018 form predates the rules in dispute. CRMLS adopted Rules 7.9 and 7.9.1 in May 2020 to implement a policy NAR adopted in November 2019, and complaint paragraph 38 states that more than 9,000 properties were marketed to the public before submission in 2018 alone. Compass’s form documents the condition the rules were written to end rather than a prior version of them.
MindCast’s Compass’s Cross-Forum Contradictions documented how Compass’s positions developed for separate audiences became vulnerable once opponents compared them. The paper matters here because Exhibit D is the first time a court holds two of those positions in one filing.
The MLS Equilibrium Series supplies three tests for whether a Compass argument survives outside the forum where Compass first made it: does the argument export across institutional contexts, does it stay consistent when Compass’s position reverses, and does Compass’s own documentary trail contradict it. The complaint fails Compass on all three.
The MLS Equilibrium Series calls Compass’s failure of all three tests a Skillman Moment: a statement made in a forum the speaker controlled, carried by an adversary into a forum the speaker does not control, where the mismatch shows. The complaint holds one completed specimen and two more imports.
Exhibit D is complete, because Compass wrote the letter, CRMLS filed it and the contradiction with the 2026 demand sits on the docket. Reffkin’s September 30 remarks became the fact that made CRMLS’s suit ripe, and his statement that the Washington agreement fully realized Compass’s objective now sits beside paragraph 61’s finding that the agreement kept mandatory submission. The Skillman Moment as Analytical Rosetta Stone of the MindCast MLS Equilibrium Seriesdefines the test. The paper matters here because the October 5 complaint is the first federal pleading to carry a specimen.
Seller choice, built for MLS boards and legislators, now has to survive a federal antitrust pleading. Compass accepted mandatory submission in Washington and attacks it in California. Exhibit D is Compass’s own document contradicting Compass’s own demand.
⚖️ Counsel: the gap between filing without dissemination and no filing is also the zone where a resolution could form. A status filed with CRMLS but withheld from cooperation matches Compass’s 2024 request and leaves Rule 7.9’s submission requirement in place.
E. How CRMLS Broke the Playbook: Forum Choice
The playbook works while Compass controls timing and forum, and CRMLS’s filing took both. CRMLS filed in Manhattan rather than in California, and the choice is the most consequential decision in the case so far. Manhattan removes the Ninth Circuit precedent Compass relies on and places the dispute before a court that has already ruled against Compass once.
A threatened defendant usually files its declaratory action in its home court. CRMLS skipped the Central District of California and chose Manhattan. The choice buys three things.
First, CRMLS leaves the Ninth Circuit. Compass’s demand letter leans on PLS.com v. NAR (9th Cir. 2022), which held that a challenge to an MLS public marketing policy plausibly alleged a group boycott. PLS.com binds every California federal court, and Compass survived NWMLS’s motion to dismiss in Seattle under it. In the Second Circuit the case is persuasive at most.
MindCast’s Compass’ Strategic Antitrust Forum Shopping v. NWMLS and Zillow described in 2025 how Compass used venue to fragment scrutiny across Washington and New York. The paper matters here because CRMLS’s filing reverses the pattern: for the first time an MLS chose the opening forum, and it chose the one Compass used against Zillow.
Second, CRMLS picks a bench with a history. The Ninth Circuit ruling that Compass relies on, the March 2026 denial of NWMLS’s motion to dismiss, does not travel with the case. The Southern District denied Compass’s preliminary injunction against Zillow on February 6, 2026 and credited the free-riding rationale behind cooperation rules, and Compass dismissed that case in March. The complaint quotes that opinion three times.
Third, CRMLS weakens Compass’s best procedural answer. Courts disfavor declaratory actions filed to beat a threatened suit, because they let the threatened party take the natural plaintiff’s forum. CRMLS filed where Compass lives, which weakens any inconvenience or forum-shopping argument Compass could make.
Compass’s claims against CRMLS also likely count as compulsory counterclaims under Federal Rule of Civil Procedure 13(a), because they arise from the same demand and the same rule. Compass can still file in California and ask New York to dismiss. The motion would ask a court to send a New York company’s dispute out of New York.
🏛️ Regulators and Lawmakers: the complaint also cites the September 16, 2026 ruling in Zillow v. Midwest Real Estate Data, which treated the MLS-to-broker relationship as vertical. Two federal courts in eight months have declined to treat cooperation rules as horizontal boycotts at the preliminary stage.
F. Forum, Scope and Peer Response Decide the Case Through 2027
The case will be decided by three things over the next fifteen months: the forum, the scope of what gets litigated and the response of other MLSs. The simulation answers one question: which forum, which scope and which response from other MLSs survive through the end of 2027? Commission rates, dual agency and the merits of any antitrust claim stay outside it.
Forum decides the governing precedent. Scope decides whether Compass’s commercial conduct, including the Redfin arrangement and representation conditions, becomes a contested issue or stays context. The response of other MLSs decides whether CRMLS stands alone.
Three subjects fall outside scope: commission rates, the legality of dual agency and the merits of any antitrust claim. The paper analyzes who moves and when, not who is right.
G. Why Predictive Behavioral Economics Adds Value
The parties and the court do not weigh costs and benefits evenly, and four decision rules explain most of what has happened. Salience, reference points, source discounting and defaults account for why CRMLS’s framing and evidence work better than Compass’s demand letter assumed.
The first decision rule concerns salience. Hidden homes were the visible harm, so the industry anchored on secrecy. CRMLS’s complaint moves the salient harm to free riding, which is harder to answer with a public website.
The second decision rule concerns reference points. Zorn’s letter reports that Reffkin and Compass’s general counsel praised the Coming Soon Limited Exposure solution in meetings months before the September 8 letter. A concession that satisfied in July looked small after the NWMLS agreement.
The third decision rule concerns source discounting. A court weighs an opponent’s account of a meeting lightly and a party’s own letter heavily. Exhibit D carries weight for that reason.
The fourth decision rule concerns defaults. Each MLS board that receives a demand letter compares a federal defense with a rule change. A filed complaint and a funded defense change the default answer.
H. Why Dynamic Game Theory Adds Value
Each institution’s best move depends on what the others do, and the payoff structure has changed since October 5. CRMLS moved first because initiative was worth more than waiting. Compass’s public commitment to litigate now binds it against its own exposure, and every other MLS faces a different calculation than it did a week ago.
A demand letter works while the sender controls timing and forum. Compass set a deadline, named a venue by implication and promised to sue. CRMLS’s filing took all three choices away in one motion.
Compass has committed publicly to litigation with no agreed resolution. The commitment binds Compass against its own exposure. Discovery in New York can reach the Redfin arrangement and the three-phase marketing materials that Zorn’s preservation notice names, subject to relevance and the court’s management of the case. Rising cost under discovery pushes against a public pledge.
Other MLSs now face a changed game. A board that once weighed a lone defense against concession can adopt CRMLS’s arguments and exhibits in its own answer and ask the fund for help. Whether any board files a matching action is an open question, and Section III carries it as a watch condition.
The MLS Equilibrium Series stated in May 2026 how Compass would adapt as its arguments failed across forums: a shift from public persuasion toward litigation concentrated on individual MLS jurisdictions, bilateral agreements that prevent precedent from accumulating and partnership offers aimed at smaller MLSs. The first two held. Compass resolved Washington by bilateral agreement and now threatens MLSs one letter at a time, each with its own release offer.
The third claim, partnership offers aimed at smaller MLSs, did not hold. Compass aimed its September demand at the largest MLS in the country rather than at smaller ones.
Compass’s reply options are limited. Compass can counterclaim in New York, file in California and seek dismissal in New York, or sue other MLSs first. Each move carries a cost the demand letter did not, and Section III states which move the simulation expects.
I. Four Institutions Become Twins and Four Enter as Actors
Eight institutions drive the outcome. Four become Cognitive Digital Twins in the simulation, and four enter as actors whose moves the twins respond to. Three causal hypotheses enter the simulation, including a null route in which procedure decides the case before forum or scope matters.
Compass · Objective: End fines on publicly marketed office exclusives · Constraints and decision rights: Public no-resolution pledge; compulsory counterclaim rule; Exhibit D · Update trigger: Court rulings on forum; discovery scope
CRMLS · Objective: Keep Rule 7.9 and the cooperative · Constraints and decision rights: Fund size; NAR charter duties; reserved claims · Update trigger: Compass’s first filing
Southern District court · Objective: Decide the case under governing procedure · Constraints and decision rights: Declaratory Judgment Act discretion; anticipatory filing doctrine · Update trigger: Motions to dismiss or transfer
Peer MLS boards · Objective: Retain members and limit legal cost · Constraints and decision rights: Compass’s release offer; antitrust limits on joint action · Update trigger: Named fund contributions; a second Compass suit
NAR and C.A.R. · Objective: Protect cooperation and legal programs · Constraints and decision rights: DOJ history on Clear Cooperation · Update trigger: CRMLS funding requests
DOJ and FTC · Objective: Preserve competition in brokerage · Constraints and decision rights: Nosalek statement; Anywhere merger review · Update trigger: Any request for a statement of interest
State attorneys general · Objective: Protect consumers and competition · Constraints and decision rights: Assembly Bill 1776 effective January 1, 2027 · Update trigger: Consumer evidence from the case
Redfin and Rocket · Objective: Keep exclusive display rights · Constraints and decision rights: Non-party status · Update trigger: Discovery requests
Three causal hypotheses enter the simulation. First, forum choice drives the outcome, because precedent differs by circuit. Second, scope drives the outcome, because conduct discovery changes Compass’s exposure. Third, a null route: the case resolves on procedure before either forum or scope matters.
The governing Vision Functions at the public level are Chicago Strategic Game Theory Vision paired with Settlement Dynamics Vision. Field-Geometry Reasoning Vision, Disclosure Vision, Coase Vision and Predictive Game Theory Vision complete the set. Picker Vision applies to the spread of resistance among MLSs if the evidence supports it.
III. MindCast Simulation Predictions
Twelve Simulation Predictions carry the forward analysis: seven on the New York case and five published entries that now resolve against it. The seven new entries take the case as it stood on October 6, 2026, with the complaint on the docket and no Compass filing in any court.
Prediction date: October 6, 2026, on the state of the docket at noon Pacific. Verification source for every entry is PACER unless stated. P marks a Primary Simulation Prediction and S a Secondary Simulation Prediction.
Simulation Synthesis
Dominant mechanism · Reading: Initiative transfer through a home-district declaratory filing, constrained by the compulsory-counterclaim rule
Active regime · Reading: Labyrinth: dense procedural constraints, slow feedback, moderate rule mutability
Replacement conditions · Reading: Dismissal or transfer to the Ninth Circuit; a California conduct statute; a Justice Department statement of interest
Behavioral equilibrium · Reading: Compass contests the forum before pleading; CRMLS holds its narrow counts until Compass commits
Institutional sufficiency · Reading: CRMLS holds the stronger adaptive position; Compass holds the wider campaign
Scenario Routes
Four routes carry the case through 2027. The ruling on Compass’s first motion shifts weight among them, and once Compass pleads counterclaims the third route closes.
Compass contests the forum, loses and stays (modal) · Sequence: motion to dismiss or transfer → denied → counterclaims → scope contest · Weight: 47–59%
Compass accepts the forum · Sequence: answer with counterclaims and no forum motion → scope contest · Weight: 23–32%
Compass contests the forum and wins · Sequence: motion granted → standalone complaint in California → Ninth Circuit · Weight: 11–20%
Compass withdraws or the parties stipulate early · Sequence: release of claims or stipulated dismissal before any Compass pleading · Weight: 2–6%
Competing Hypotheses
Three readings of the case competed before the simulation chose among them.
Procedural containment. Compass contests the New York forum, loses, pleads counterclaims and the case stays a dispute about rule legality. Falsifier: conduct evidence enters the operative pleadings or a discovery order within the first year.
Conduct expansion. Compass pleads counterclaims, CRMLS deploys its reserved claims and the Redfin arrangement and buyer access become contested facts. Falsifier: the dispute stays confined to rule legality through June 2027.
Forum loss. The court dismisses or transfers the action as an anticipatory filing and Compass refiles in the Ninth Circuit. Falsifier: the case remains in New York through June 2027.
The simulation favors procedural containment, treats conduct expansion as a minority branch and places forum loss lowest. The entries below carry the weights.
A. Primary Simulation Predictions
Three primary entries state what happens first, where the case stays and whether Compass’s commercial conduct enters the dispute.
P-1 (62–75%). Compass’s first substantive filing in 1:26-cv-08796 is a motion to dismiss or transfer rather than an answer with counterclaims, by December 31, 2026 at the latest. A motion to stay also qualifies. Falsifier: the first substantive filing is an answer or a stipulation of dismissal.
Confidence class: Event
Band: 62–75%
Window: Service of the complaint through Compass’s responsive-pleading deadline; outer gate December 31, 2026
Trigger: Service of the complaint
Falsifier: Compass’s first substantive filing is an answer, with or without counterclaims, or a stipulation of dismissal
Verification source: PACER, 1:26-cv-08796
Stakeholder exposure: MLS counsel reading Compass’s response as a template; peer boards timing their own decisions
Monitoring signal: First Compass docket entry after service; checked daily
P-1’s mechanism is the compulsory-counterclaim rule. Pleading in New York accepts the forum, so Compass’s incentive is to contest the vehicle first.
P-2 (79–88%). The Southern District retains the case: no order dismisses or transfers the action on first-filed, anticipatory-filing or forum non conveniens grounds through June 30, 2027. Falsifier: such an order inside the window.
Confidence class: Event
Band: 79–88%
Window: October 6, 2026 through June 30, 2027
Trigger: Any Compass forum motion
Falsifier: An order dismissing or transferring on those grounds inside the window. A stipulated dismissal resolves the entry Not Publicly Observable
Verification source: PACER
Stakeholder exposure: Compass loses the Ninth Circuit corridor; peer MLSs gain Second Circuit persuasive authority
Monitoring signal: Orders on any motion to dismiss, stay or transfer
P-2’s mechanism is forum geometry. CRMLS filed in Compass’s home district, which removes the inconvenience argument that normally defeats an anticipatory filing. The entry carries one qualifier: the assigned judge was unknown at the data cutoff.
P-3 (37–46%). A CRMLS filing in 1:26-cv-08796 puts Compass’s commercial conduct before the court as a disputed fact by June 30, 2027. Conduct means the Redfin arrangement, representation conditions or showing access. Qualifying filings are an amended complaint, a reply to counterclaims, a declaration or a discovery motion. Falsifier: the window closes with the dispute confined to rule legality.
Confidence class: Event
Band: 37–46%
Window: October 6, 2026 through June 30, 2027
Trigger: Compass pleads counterclaims
Falsifier: The window closes with the dispute confined to rule legality and no CRMLS filing raising those facts
Verification source: PACER
Stakeholder exposure: Redfin as a non-party discovery target; state enforcers watching for access allegations in the pleadings
Monitoring signal: Any amended operative pleading or discovery motion; checked at each docket update
P-3 sits below even odds because CRMLS holds three responses at the counterclaim node: amend with its reserved claims, pursue conduct evidence through discovery without new claims, or keep its narrow counts. MindCast’s Compass Private Listings Behind the Discovery Wall matters here because it shows which buyer-capture variables NWMLS tested in discovery, and Zorn’s preservation notice names the same ones. The entry measures pleading development and not evidence obtained or a court finding that conduct matters.
B. Secondary Simulation Predictions
S-1 (66–76%). Conditional on Compass asserting antitrust claims against CRMLS anywhere, it asserts them first as New York counterclaims rather than in a standalone complaint elsewhere through March 31, 2027.Falsifier: a standalone Compass complaint naming CRMLS is docketed before any New York counterclaim.
S-2 (32–43%). Conditional on Compass counterclaims, CRMLS asserts at least one of the seven claims listed in Exhibit C within 60 days of the counterclaims. Falsifier: 60 days pass with no CRMLS amendment or reply asserting one.
S-3 (69–84%). Compass files an antitrust complaint against at least one MLS other than CRMLS by December 31, 2026. Falsifier: no such complaint on any docket by that date. Verification source: PACER and state dockets.
S-4 (36–48%). The New York action ends by stipulated dismissal or announced agreement before Compass serves an opening expert report and before the end of 2027. Falsifier: Compass serves an opening expert report, or the case reaches a merits ruling first.
S-2 is one branch of three at the counterclaim node, and the paper treats CRMLS’s reserved claims as an available option rather than an expected move. S-4 carries the widest uncertainty of the seven.
⚖️ Counsel: P-1 and S-1 together say Compass’s claims against CRMLS arrive late and in New York. An MLS answering its own letter reads that as time.
C. Published Simulation Predictions, Resolution Rules and Watch Conditions
Five entries from the two October 2 papers bear on the New York case. Each keeps its published band and window.
California P-2 · 77–90%. Compass files an antitrust complaint against at least one MLS between October 6 and December 31, 2026.
California S-3 · 58–74%. Compass files a complaint naming CRMLS in the same window.
California S-4 · 82–92%. CRMLS does not amend its rules to permit public marketing of an exclusive listing without MLS submission between October 6, 2026 and June 30, 2027. Verification source: CRMLS Rules and Policy Change Summary.
California S-1 · 64–80%. A named institution publicly commits money to the MLS Cooperation Legal Defense Fund by March 31, 2027. Verification source: C.A.R., NAR and MLS announcements.
Access P-2 · 48–64%. A complaint or counterclaim filed against Compass alleges that buyers or their agents were denied showings or offers on a listing kept out of the MLS, or were required to change representation, between October 6, 2026 and June 30, 2027.
Three resolution rules apply.
“Complaint” means an initiating pleading. A Compass counterclaim in New York does not satisfy California P-2 or S-3.
CRMLS’s complaint was filed on October 5 and falls outside the Access P-2 window. An amended complaint or a counterclaim filed on or after October 6 that carries the Exhibit C allegations qualifies, as the published entry specifies.
“A Compass suit against an MLS” in the access paper’s S-1 and S-4 means an action Compass initiates.
Four questions carry no Simulation Prediction, because the evidence does not yet support one. Each is a watch condition with the event that would produce an entry.
Compass’s next target. The squeeze described in Section V predicts that Compass’s next MLS defendant has a rule more restrictive than CRMLS’s, with no non-exclusive route and no Limited Exposure equivalent. Entry follows: the first new Compass complaint.
The anti-suit injunction. Courts rarely bar a party from suing in its home forum, and an early denial of Prayer C would read as a CRMLS loss while deciding nothing about the rules. Entry follows: Compass’s first motion addressing Prayer C.
Copycat declaratory filings. A filed template and a fund create the option for other MLSs, and HousingWire asked on October 6 whether any will follow. Entry follows: a second MLS’s public statement on the fund or a second Compass suit.
A Justice Department statement of interest. Entry follows: any Justice Department or FTC public reference to the case.
D. Limits and Break Conditions
Three events would replace the contest these entries describe. Dismissal or transfer of the New York action returns the dispute to a forum Compass selects. A California conduct statute moves the rule from MLS rulebooks to license law. A Justice Department statement of interest changes the authority both sides argue from.
One evidence gap limits every conclusion about buyer access. The allegations in Exhibit C come from one party and have not been tested in any forum. The New York case is the first forum that can test them, and P-3 states how likely that test is to begin inside the window.
MindCast validates every Simulation Prediction publicly against its named source.
Working With MindCast
MindCast AI is a Predictive Behavioral Economics + Dynamic Game Theory simulation firm. The firm models how institutions decide and how each responds to the others, using Cognitive Digital Twins built from public evidence.
The published analysis stops at the public docket. Every entry above rests on Compass’s filings, CRMLS’s exhibits and the parties’ public statements, with each institution’s incentives modeled from the outside.
An MLS board, a brokerage or a state office deciding its own next move holds information the public simulation lacks. The institution’s own rules and their history, its retention data, its defense budget and the demand letter it received all sit outside the public docket. A commissioned simulation builds that institution’s Cognitive Digital Twin from its own documents and replays the New York contest against its own options.
Commissioned scope adds what the public text withholds. Clients receive complete probability distributions and P10/P50/P90 ranges for each entry and the full scenario tree behind the four routes. Decision thresholds tied to the Section IV triggers, counterparty modeling of Compass’s response to each option and a docket-keyed monitoring system complete the engagement.
Four engagements map to the entries.
An MLS board’s response to its own demand letter (P-1, S-3).
An association’s funding decision (California S-1).
Brokerage counsel’s preservation and pleading posture (P-3, S-2).
A state office’s evidence plan (P-3, Access P-2).
A scoped diagnostic session on one decision is the first step. Contact mcai@mindcast-ai.com to schedule one.
IV. What Each Audience Does Now and What Remains Exposed
The seven entries translate into decisions for five audiences. Each decision names who acts, what the low-regret move is now, which trigger changes it and which entry supports it. The actions are analytic options and not legal, investment or fiduciary advice.
Stakeholder Strategy Matrix
🗂 MLS Leaders · Objective: Decide the demand letter on the board’s own terms · Low-regret move now: Board vote on the Compass letter entered in the minutes; litigation reserve in the 2027 budget · Trigger-dependent move: On a second Compass suit (S-3): decide court answer, contribution or concession within one board cycle · Primary risk: A concession before P-1 resolves surrenders leverage the New York filing created
🤝 REALTOR Associations · Objective: Fund or decline before the question is forced · Low-regret move now: Decide the CRMLS funding request before Compass’s first New York filing (P-1) · Trigger-dependent move: On P-2 resolving true: publish the commitment · Primary risk: Funding a case that leaves New York (P-2 fails)
⚖️ Counsel · Objective: Preserve evidence and avoid overpleading · Low-regret move now: Preservation notices on showing and offer communications involving Compass listings · Trigger-dependent move: On Compass counterclaims: decide amend, discover or hold within 60 days (S-2) · Primary risk: Pleading conduct claims before Compass commits
🏛️ Regulators and Lawmakers · Objective: Secure access evidence before it ages · Low-regret move now: Preservation demand to Compass covering listing histories, showing logs and offer logs · Trigger-dependent move: On P-3 resolving true: request the pleaded allegations and any supporting filings from the docket · Primary risk: Waiting for a court to test access while logs age out
💼 Brokers · Objective: Stay inside CRMLS’s rules while the case runs · Low-regret move now: Audit active exclusive listings against Rule 7.9; offer sellers the non-exclusive and Limited Exposure routes · Trigger-dependent move: On California S-4 holding: keep the audit standing through June 2027 · Primary risk: Fines on exclusive listings marketed publicly without submission
Strategic Posture by Stakeholder
🗂 MLS Leaders. The board’s objective is to decide its own rule on its own schedule. Every MLS holding a Compass letter is at step one of the playbook, and the New York filing changed the step’s value. CRMLS’s complaint, exhibits and forum choice are available to any board, and P-2 at 79–88% says the forum will probably hold. The constraint is antitrust law on joint action, so each board decides alone and pooled money stays limited to defense.
MLS boards’ decision gate is S-3: a second Compass suit by December 31 tells a board whether the campaign is still running against targets like it. Section V explains why the next target probably has a rule stricter than CRMLS’s, and a board with a non-exclusive route and a Limited Exposure status reads that as lower exposure.
🤝 REALTOR Associations. The objective is to decide the funding question before the case forces it. CRMLS has asked C.A.R. and NAR for money, and California S-1 at 64–80% expects a named commitment by March 31, 2027. The constraint is the Justice Department’s history with Clear Cooperation, which an association weighs against the Nosalek statement that cooperation policies standing alone are not anticompetitive.
Compass’s first New York filing (P-1) is the gate: a motion to dismiss means the forum fight is on and the fund’s first use is defending the forum, not the rule.
⚖️ Counsel. The objective is to hold the evidence and avoid overpleading. Brokerage counsel issue preservation notices now, because P-3 at 37–46% means the access allegations may never become a contested issue in this case and the privately held evidence has to stand alone. MLS counsel facing a Compass letter copy CRMLS’s structure: narrow counts, exhibits that carry Compass’s own words, and reserved claims held for the counterclaim node. S-2 at 32–43% says CRMLS itself will probably not deploy its reserved claims within 60 days, which tells peer counsel that the reserve is leverage rather than a plan.
🏛️ Regulators and Lawmakers. The objective is access evidence that does not depend on this case. P-3 below even odds means a state office that waits for the court to test the Exhibit C allegations will probably wait past June 2027. A preservation demand to Compass costs nothing and commits no office to a filing. Lawmakers read the case as the local dispute with named parties that the California paper said a conduct statute needs, and the Legislature can act whether or not P-3 resolves true.
💼 Brokers. The objective is to stay inside CRMLS’s rules while the case runs. California S-4 at 82–92% says the rules hold through June 2027. A broker who wants public marketing without submission uses a non-exclusive agreement, and a seller who wants portal limits uses Limited Exposure with submission. Both routes exist today and neither depends on the case.
Risk Mitigation by Time Gate
Now to 30 days · Risk to contain: Compass’s first New York filing arrives before boards and counsel have positions (P-1) · Mitigation: Board vote on the letter; preservation notices; funding decision scheduled · Escalation trigger: Compass files a motion or an answer
30 to 90 days · Risk to contain: A second Compass suit against another MLS (S-3) · Mitigation: Each board decides court answer, contribution or concession alone; associations publish or decline funding · Escalation trigger: A complaint against any MLS on any docket
3 to 12 months · Risk to contain: The case leaves New York (P-2 fails) or conduct never enters (P-3 fails) · Mitigation: Regulators hold access evidence independently; MLS counsel keep reserved claims as leverage · Escalation trigger: An order on a forum motion; the first scope ruling
Beyond 12 months · Risk to contain: A stipulated resolution ends the case without a ruling on the rules (S-4) · Mitigation: Peer MLSs treat New York as persuasive authority only and keep their own rules under board authority · Escalation trigger: A stipulation or announced agreement
The four time gates above share one feature. Every action belongs to one institution and none depends on what Compass or the court does next.
V. CRMLS Bought a Forum and a Narrow Question, and Compass’s Campaign Grew Costlier
The seven entries and the stakeholder moves carry five consequences. Each traces to an entry or a route.
A. A Strong Decision With a Real Tradeoff
CRMLS’s filing was a strong strategic decision, and the assessment holds apart from its chances on the merits. CRMLS seized the initiative by filing before Compass’s deadline. CRMLS chose a focused question, asking only whether its submission rules violate antitrust law and holding the broader conduct claims in reserve. CRMLS put Compass’s own documents into play, and Exhibit D gives it a concrete answer to Compass’s current position that Compass must explain.
CRMLS’s tradeoff is real. CRMLS committed to litigation cost and exposed its rules to an adverse ruling. Filing first bought a forum (P-2) and a narrow question. Filing first did not buy forum control in every scenario or discovery into conduct (P-3 at 37–46%).
A declaration that CRMLS’s rules are lawful binds CRMLS and Compass. Other MLSs inherit persuasive authority and a template, not protection, and the Ninth Circuit stays open for Compass’s next case. CRMLS secured the opening forum and framed a narrow question.
B. Five Pressures on Compass’s Next Suit
CRMLS raised the cost of Compass’s wider campaign by making each new suit harder to isolate from the positions Compass takes in New York. Five pressures follow.
An adverse ruling would weaken Compass’s next complaint. A decision upholding CRMLS’s rules gives other MLSs persuasive authority, strongest where their rules resemble CRMLS’s. Different rules and different circuits limit the effect.
Compass must reconcile its own documents across cases. Any MLS Compass sues can use Exhibit D to challenge the shift from supporting mandatory submission in 2024 to attacking it in 2026. Compass needs one explanation that works in every forum.
Additional suits can strengthen the conduct inquiry. Where relevant, defendants can connect Compass’s rule challenges to its portal arrangements, access conditions and recruitment practices. Discovery stays conditional in every case, and the Discovery Wall paper shows what one MLS obtained when a court allowed it.
Other MLSs gain a defense template without filing matching actions. CRMLS supplied arguments, exhibits and procedural choices that peers can adopt in their own answers, which is why the copycat-filing question stayed a watch condition rather than an entry.
Compass risks conflicting positions. Arguments about cooperation, seller choice and submission requirements in one case constrain its arguments elsewhere. The MLS Equilibrium Series’ directional-consistency test asks whether an argument inverts when the firm’s position reverses, and every new forum gives a defendant another place to run that test against the New York filings.
🗂 MLS Leaders: a listing service whose rule looks like NWMLS’s old ban sits closer to Compass’s next complaint than one with a non-exclusive route and a Limited Exposure status.
Compass’s squeeze has a shape. Expanding the campaign increases the opportunities for defendants to compare Compass’s legal theory with its executed conduct. Keeping cases narrow contains that exposure but limits the campaign’s reach.
S-3 at 69–84% says the campaign continues anyway, and the squeeze predicts how. The simulation’s expected next target has a rule that looks like NWMLS’s old ban rather than CRMLS’s: no non-exclusive route and no Limited Exposure status. Against such a rule Compass can plead a horizontal ban without conceding that less restrictive alternatives exist. Section III.C carries that as a watch condition.
C. Who Captured What
CRMLS captured the initiative and the forum and absorbed the cost and the merits risk. Peer MLSs captured a template and persuasive authority at no cost and absorbed nothing unless they act. Compass kept its campaign (S-3) and absorbed a forum it did not choose (P-2) and a documentary problem it created.
Sellers and buyers absorb nothing new from the filing. The rules in CRMLS territory hold through June 2027 (California S-4), and the two routes to public marketing outside full cooperation exist whatever the court decides.
D. What Changes If an Entry Fails
If P-1 fails and Compass answers with counterclaims at once, Compass has accepted New York and the scope contest begins months earlier. P-3 and S-2 become the live entries, and MLS counsel decide the counterclaim node sooner than the time-gate table assumes.
If P-2 fails and the case leaves New York, the dispute returns to a forum Compass selects and the Ninth Circuit’s PLS.com precedent governs. CRMLS’s forum advantage ends, the template loses its procedural lesson and peer boards reassess their own exposure. The entry is validated as a miss and the three remaining primary entries stay on the New York docket only if the case survives there.
If P-3 resolves true, the Exhibit C allegations reach a forum that can test them, and state offices gain additional public allegations and any supporting evidence without opening an inquiry. The access thesis moves from conditional exposure to live dispute.
If S-3 fails and Compass sues no other MLS by December 31, the campaign has paused behind the New York case. Peer boards gain time, and the squeeze has done its work earlier than the model expected.
What to Watch
Nine signals move the entries, and one dominates: Compass’s first substantive filing on the New York docket decides whether the forum fight or the scope fight comes next. Each signal has a named source and a stated consequence.
Compass’s first filing in 1:26-cv-08796 · Entry: P-1 · Source: PACER · Cadence: Daily after service · Consequence: Resolves P-1; opens the forum or scope path
Order on any motion to dismiss, stay or transfer · Entry: P-2 · Source: PACER · Cadence: At ruling · Consequence: Resolves P-2; a transfer replaces the contest
Amended pleading, reply or discovery motion raising conduct · Entry: P-3 · Source: PACER · Cadence: Each docket update · Consequence: Resolves P-3; confirms Access P-2 if the allegations qualify
Standalone Compass complaint naming CRMLS · Entry: S-1, California S-3 · Source: PACER and state dockets · Cadence: Weekly · Consequence: Resolves both
CRMLS amendment within 60 days of counterclaims · Entry: S-2 · Source: PACER · Cadence: Weekly after counterclaims · Consequence: Resolves S-2
Compass complaint against any other MLS · Entry: S-3, California P-2 · Source: PACER and state dockets · Cadence: Weekly · Consequence: Resolves both; releases the next-target watch condition
Stipulation or announced agreement · Entry: S-4 · Source: PACER; party statements · Cadence: At filing · Consequence: Resolves S-4; P-2 becomes Not Publicly Observable if forum unresolved
Named fund commitment · Entry: California S-1 · Source: C.A.R., NAR, MLS announcements · Cadence: Monthly · Consequence: Resolves California S-1; releases the copycat watch condition
CRMLS rule change on exclusive listings · Entry: California S-4 · Source: CRMLS Rules and Policy Change Summary · Cadence: Monthly · Consequence: Resolves California S-4
Every entry keeps its band, window, falsifier and verification source as published. A new observation changes the monitoring reading, and a revision note publishes only when the change would alter a stakeholder action.
Conclusion
Compass’s playbook won in Washington because Compass held the initiative at every step: it chose when to demand, when to sue and when to agree. CRMLS broke the playbook’s opening sequence on October 5 by filing before Compass could. Compass now answers in New York, outside the Ninth Circuit and against a letter it wrote in 2024.
The simulation reads the case as a procedural contest first. Compass probably contests the vehicle before pleading (P-1, 62–75%) and the case probably stays in New York (P-2, 79–88%). The wider campaign probably continues against another MLS by year-end (S-3, 69–84%).
Whether Compass’s conduct becomes an expressly disputed fact in this case sits below even odds (P-3, 37–46%). The access question remains what the case can test rather than what it will test.
MLS boards decide their own letters now and keep their reserves. Associations decide funding before Compass’s first filing. Regulators preserve access evidence without waiting for the court. Everyone else watches one entry: Compass’s first substantive filing on the New York docket decides whether the forum fight or the scope fight comes next.
Appendix A: Selected MindCast Works
Nine MindCast works supply the framework, the prior Simulation Predictions, the Washington comparison and the access analysis used in this paper.
The MindCast MLS Equilibrium Series. The series supplies the governance explanation for which MLSs resist Compass, the three tests applied to Compass’s arguments in Section II.D and the May 2026 forecast of Compass’s adaptation assessed in Section II.H.
California Private Listing Law After Washington SSB 6091 — Broker Conduct Rules for Listing Visibility, Showing Access and Buyer Representation. The paper supplies four of the published Simulation Predictions applied here and proposes the 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 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 and supplies the conduct questions CRMLS could put to Compass.
Compass’ Strategic Antitrust Forum Shopping v. NWMLS and Zillow. The paper set out Compass’s venue-fragmentation strategy, which CRMLS’s filing reverses.
Compass’s Cross-Forum Contradictions. The paper explains how positions built for separate audiences fail when compared, which is what Exhibit D does to Compass’s demand.
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 that CRMLS’s refusal now joins.
Appendix B: Sources
Primary legal sources appear first, followed by the secondary reporting used for synthesis.
CRMLS v. Compass, Inc., No. 1:26-cv-08796 (S.D.N.Y. filed Oct. 5, 2026), complaint with Exhibits A–E. CRMLS’s Protecting Cooperation page carries the demand letters and CRMLS’s responses. CRMLS press release, October 5, 2026.
Compass, Inc. v. Zillow, Inc., No. 25-cv-05201 (S.D.N.Y.), order denying preliminary injunction, February 6, 2026, and voluntary dismissal, March 18, 2026. Zillow Group, Inc. v. Midwest Real Estate Data LLC, No. 1:26-cv-5451 (N.D. Ill.), complaint of May 12, 2026 and order of September 16, 2026. Compass, Inc. v. Northwest Multiple Listing Service, No. 2:25-cv-00766 (W.D. Wash.), order of March 19, 2026 and NWMLS counterclaims of April 2026; Compass–NWMLS agreement, August 31, 2026. PLS.com, LLC v. National Association of Realtors, 32 F.4th 824 (9th Cir. 2022). Anywhere Real Estate Inc., Form 10-K for 2024.
Reporting: HousingWire and Inman on the filing and Compass’s response, October 6, 2026; RISMedia, October 6, 2026; Inman, October 2, 2026; RISMedia, September 30, 2026; Real Estate News, September 30, 2026.
