787 F.Supp.3d 42
E.D. Pa.2025Background
- Plaintiffs (home buyers) allege that Hanna Holdings, Inc., a major real estate brokerage and National Association of Realtors (NAR) member, conspired to maintain anticompetitive brokerage commission rules.
- Plaintiffs claim these rules (promulgated through the NAR and Multiple Listing Services [MLS]) keep buyer-broker commissions artificially high and stifle competition nationwide.
- Hanna moved to dismiss on several grounds, including lack of standing, failure to state a claim, and failure to mediate; the court previously addressed standing/mootness.
- The present opinion rules primarily on the sufficiency of plaintiffs’ claims under Sherman Act, state antitrust and consumer protection statutes, and unjust enrichment.
- The court found the allegations did not plausibly allege a horizontal conspiracy among competing brokers, but did plausibly allege a vertical agreement between Hanna and NAR.
- Various state consumer protection and unjust enrichment claims were dismissed on procedural and substantive deficiencies, but some antitrust claims survived.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Existence of a horizontal antitrust conspiracy | Hanna and other brokers jointly implemented anticompetitive NAR rules | Alleged conduct reflects only membership/adherence to NAR, not agreement | Not plausibly pleaded; dismissed without prejudice |
| Existence of a vertical agreement (Hanna/NAR) | Hanna’s actions constitute a vertical agreement to enforce restraint | Admits possibility of a vertical agreement, but contests plausibility | Plausibly pleaded; survives motion to dismiss |
| Plausibility of product/geographic market definitions | Market for buyer-agent services in areas covered by NAR MLS | Market definition defective—too narrow, ignores two-sided market | Definitions plausible at pleading stage; can revisit post-discovery |
| Sufficiency of consumer protection/unjust enrichment | Allegations of deception and overcharge satisfy state statutes/common law | Require specific deceptive conduct/statutes contain broker exemptions, vague to state law | Some claims dismissed for lack of deception/exemptions; unjust enrichment dismissed as too vague |
Key Cases Cited
- Bell Atl. Corp. v. Twombly, 550 U.S. 544 (U.S. 2007) (pleading standard for antitrust conspiracy requires plausible factual allegations, not just parallel conduct)
- Leegin Creative Leather Prods., Inc. v. PSKS, Inc., 551 U.S. 877 (U.S. 2007) (rule of reason is default for restraint of trade analysis, especially for vertical agreements)
- Am. Express Co. v. Ohio, 585 U.S. 529 (U.S. 2018) (assessment of two-sided markets under Sherman Act)
- Queen City Pizza, Inc. v. Domino’s Pizza, Inc., 124 F.3d 430 (3d Cir. 1997) (plausibility of market definition can be tested at pleading stage)
- Associated Press v. United States, 326 U.S. 1 (U.S. 1945) (adherence to association rules can constitute agreement for Sherman Act purposes)
- Nat’l Soc’y of Pro. Eng’rs v. United States, 435 U.S. 679 (U.S. 1978) (professional association rule may be agreement under Sherman Act)
- Bus. Elecs. Corp. v. Sharp Elecs. Corp., 485 U.S. 717 (U.S. 1988) (distinction between horizontal and vertical agreements in antitrust law)