Compass Inc. leveled fresh antitrust salvos against Zillow Group in a marathon four-day preliminary injunction hearing concluding November 21, 2025, in Manhattan federal court, where CEO Robert Reffkin defended the brokerage’s “black box” private exclusives tool as a consumer boon while accusing Zillow of monopolistic intimidation via its June 30 “Zillow Ban”—barring listings marketed publicly over 24 hours before MLS entry. Judge Jeannette A. Vargas grilled Reffkin on the opaque algorithm—handling 7,000+ off-market listings—amid Zillow’s claims of “double-speak” and hidden schemes stifling competition, with Compass alleging the policy—mirroring Redfin’s—costs agents 15-20% leads and sellers 10% faster sales, per internal models. The brokerage seeks to pause enforcement, citing irreparable harm in a suit filed June 23, 2025, escalating a raucous debate over portal dominance (Zillow’s 227 million uniques, 40% share).
Testimony clashed: Reffkin touted the three-phase strategy—private previews for feedback—yielding 20% higher seller satisfaction, but Zillow’s Jeremy Wacksman denied collusion, unveiling a June 13, 2025, email where Compass’s Rory Golod assured leaders: “Private Exclusives…are still allowed under Zillow’s ban.” Zillow’s Errol Samuelson countered: the policy promotes “shared data,” not gatekeeping, while CFO Jeremy Hofmann testified 679 Compass agents violated it versus 13 at Howard Hanna, per October 13 release. Compass SVP Ashton Alexander and President Neda Navab faced cross-exam on agent comms, with Zillow alleging false info post-announcement.
Broader stakes: the ban—extending to Trulia—allegedly targets Compass’s innovations, echoing FTC’s September 30 suit on Zillow-Redfin’s $100 million rental syndication, where 85% market control hikes fees 15-20%. Compass, wielding Ken Dintzer (Google antitrust lead), invokes Sherman/Clayton Acts, demanding unwind; Zillow vows defense, projecting $2.4 billion Q4 revenue stability. Shares: Compass -2% to $4.12, Zillow -1.5% to $58.12 post-hearing, erasing $2 billion cap.
As Vargas rules—potentially December—this leveled suit exemplifies portal power plays: bans battlegrounds for housing’s fragmented frontier, where exclusives forge or fracture competition’s code.
