We’ve previously blogged about Bristol-Myers Squibb v. Superior Court (“BMS”), in which the Supreme Court granted certiorari to review a decision of the California Supreme Court that adopted an unusual—and extraordinarily expansive—view of California courts’ power to exercise specific personal jurisdiction over a defendant.

We filed an amicus brief on behalf of the Chamber of Commerce of the United States of America, the California Chamber of Commerce, the American Tort Reform Association, and the Civil Justice Association of California, arguing that the California court’s holding conflicted with numerous Supreme Court decisions making clear that in order to invoke specific jurisdiction, a plaintiff’s claims must arise out of the defendant’s in-state conduct.  (The views in this post are ours, and not those of our clients.)

The case was argued in April, and the Court announced its decision today. The result is an 8-1 opinion rejecting the California Supreme Court’s approach and, in our view, recognizing important limits imposed by the Fourteenth Amendment’s due process clause on the ability of courts to adjudicate cases that aggregate the claims of plaintiffs from many jurisdictions.

The immediate impact of the decision is to limit the forums where nationwide mass actions in state court can proceed to those states in which the defendant is subject to general jurisdiction (usually the state of incorporation and principal place of business).  In addition, as we discuss below, the decision raises substantial questions about whether nationwide class actions can proceed in jurisdictions where a defendant is not subject to general jurisdiction.…
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