Nation’s highest court reverses California Supreme Court decision that extended the jurisdictional reach of state courts.

In the 2016 case Bristol-Myers Squibb Co. v. Superior Court (Anderson), the California Supreme Court greatly expanded state court personal jurisdiction over out-of-state defendants. The court held that a “single, coordinated, nationwide course of conduct” gave California courts specific personal jurisdiction to hear all claims by both California and out-of-state plaintiffs, regardless of whether plaintiffs’ injuries occurred in California.