Whether Rule 8(a)(2) permits a Sherman Act § 1 conspiracy complaint to survive a motion to dismiss when it alleges parallel business conduct and a conclusory assertion of agreement, but no factual context suggesting an actual agreement.
Holding
No. A complaint must contain enough factual matter to state a claim that is plausible on its face; parallel conduct that is merely consistent with conspiracy, coupled with a bare assertion of agreement, does not suffice.
Reasoning
Section 1 reaches only restraints produced by a contract, combination, or conspiracy. Parallel business behavior may serve as circumstantial evidence of an agreement, but it is not itself unlawful and does not establish a conspiracy because competing firms may independently respond in the same way to common market conditions and economic incentives.
Rule 8 does not demand detailed factual allegations or a probability showing at the pleading stage. But it does require a short and plain statement that shows entitlement to relief. Labels, legal conclusions, and a formulaic recitation of elements do not meet that requirement; the pleaded facts must raise the right to relief above a speculative level.
For a § 1 claim based on parallel conduct, the complaint must place that conduct in a context suggesting a preceding agreement rather than conduct that is equally compatible with independent action. The required factual matter need only create a reasonable expectation that discovery will reveal evidence of an illegal agreement, but it must make agreement plausible, not merely conceivable.
The Court rejected the Second Circuit’s reliance on Conley v. Gibson’s statement that dismissal is improper unless there is “no set of facts” supporting relief. That phrase could not mean that a conclusory complaint survives simply because later-discovered, unpleaded facts might support it. Conley described the range of proof available after a complaint has adequately stated a claim; it did not define the minimum standard for adequate pleading.
The Court also stressed the practical importance of this threshold. Antitrust discovery against major firms can be extraordinarily expensive and can create settlement pressure even on meritless claims. Requiring plausible allegations before discovery begins prevents a plaintiff with no reasonably founded hope of finding supporting evidence from imposing those costs.