Whether an order denying or decertifying class certification is an appealable final decision under 28 U.S.C. § 1291.
Holding
No. A class-certification order is ordinarily interlocutory, not a final decision appealable as of right under § 1291.
Reasoning
Section 1291 generally permits appeals only from decisions that end the litigation on the merits and leave nothing but execution of the judgment. A denial or decertification of a class does not itself end the lawsuit, because the named plaintiff remains free to pursue an individual claim. The order therefore is not final in the ordinary sense.
The Court emphasized that the final-judgment rule prevents the expense, delay, and disruption caused by piecemeal appellate review. Class actions do not receive a special appellate-jurisdiction rule merely because they are governed by Rule 23; appealability in class litigation is governed by the same finality principles applicable to other civil cases.
The Court also noted that Congress had supplied a limited route for immediate review of appropriate nonfinal orders through § 1292(b). That procedure requires district-court certification and appellate-court permission, preserving screening mechanisms that appeals as of right from class rulings would bypass.