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SCOTUS upholds nixing of product liability defense judgment

Staff Report//March 3, 2026//

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SCOTUS upholds nixing of product liability defense judgment

Staff Report//March 3, 2026//

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Summary:
  • S. Supreme Court vacated judgment after finding lack of complete .
  • Trial court improperly dismissed Whole Foods to exercise federal jurisdiction.
  • 5th Circuit reversed, ruling diversity defect required vacatur.
  • Justice Thomas questioned scope of doctrine in concurrence.

A judgment against the plaintiffs in a case removed to federal court could not stand where the trial judge improperly dismissed a co-defendant in a defense effort to establish diversity jurisdiction, a unanimous has ruled.

Click here to read the full text of the U.S. Supreme Court’s Feb. 24 decision in Hain Celestial Group, Inc. v. Palmquist.

The plaintiffs in the case, Sarah and Grant Palmquist, sued Hain Celestial Group, Inc., and Whole Foods Market, Inc. in Texas state court. The plaintiffs alleged their child suffered from serious developmental disorders and a range of physical and mental conditions as a result of ingesting toxic heavy metals in baby food made by Hain and purchased from Whole Foods.

In their lawsuit, the plaintiffs asserted state-law product liability and negligence claims against Hain, and state-law breach-of-warranty and negligence claims against Whole Foods.

Hain, which has its principal place of business in New York, sought to remove the case to federal court based on diversity of citizenship.

However, because Whole Foods has its principal place of business in Texas and the Palmquists are residents of the state, Hain in its notice of argued Whole Foods had been improperly joined in the lawsuit and should be dismissed.

A federal judge granted Hain’s motion to dismiss Whole Foods on the ground of misjoinder. Exercising jurisdiction based on the complete diversity between Hain and the plaintiffs, the judge denied the Palmquists’ motion to remand.

In the subsequent trial, the judge granted Hain’s motion for judgment as a matter of law on the ground the Palmquists failed to present sufficient evidence on the issue of causation.

The 5th U.S. Circuit Court of Appeals reversed, concluding Whole Foods had been improperly dismissed from the case. And since the trial court lacked diversity jurisdiction, the judgment in favor of Hain had to be vacated.

The Supreme Court granted certiorari to resolve a divide in the courts of appeals as to whether vacatur is required under the circumstances of the case.

The Supreme Court affirmed, concluding the trial court’s erroneous dismissal of Whole Foods failed to cure the jurisdictional defect that existed when the case was removed to federal court, necessitating an order vacating the judgment in Hain’s favor.

  • “In Hain’s view, the correctness of the District Court’s dismissal is irrelevant because, like in Caterpillar [Inc. v. Lewis, 519 U. S. 61 (1996)], the parties were completely diverse by the time of final judgment. Hain is mistaken. This Court has never held that a district court can create jurisdiction through its own mistakes. A rule to the contrary would permit courts to enlarge their jurisdiction beyond the limits Congress imposed. …
    “The Palmquists exercised the right to choose a state forum by purposefully and properly joining a nondiverse defendant against whom they could not proceed in federal court, and diligently asserted that right by promptly moving to remand the case to state court. The decision to structure their case in this way was the Palmquists’ to make; [Federal Rule of 21 permitting a federal court ‘on its own’ to ‘add or drop a party’ ‘on just terms’] does not permit a court or a defendant to override their choice in these circumstances.”
    — Justice Sonia Sotomayor, opinion of the court

 

  • “I join the Court’s opinion in full. I write separately to note my skepticism of the doctrine of ‘improper joinder,’ which the District Court invoked to dismiss Whole Foods in this case. The doctrine appears to allow federal courts to enlarge their jurisdiction by assessing the merits of claims over which they lack jurisdiction. …
    “But this Court’s precedents do not support the lower courts’ more recent approach. As I read them, this Court’s ‘fraudulent joinder’ precedents concerned only whether the plaintiff avoided federal diversity jurisdiction by bad faith or actual fraud — such as lying about a party’s conduct or citizenship. These precedents were limited to cases of ‘extreme abuse.’ Unlike the lower courts’ more recent decisions, they did not appear to turn on the strength of the claims on the merits.
    “Federal courts sitting in diversity likely cannot dismiss nondiverse parties based on their view of the merits of the claims against those parties. Doing so appears unfaithful to Congress’s limits on our diversity jurisdiction and inconsistent with this Court’s precedents. … [T]he improper-joinder doctrine ‘requires federal courts to exercise jurisdiction where none exists over questions of state law that the state courts are better suited to address themselves.’ In a future case where the issue is briefed and squarely presented, this Court should consider the propriety of the improper-joinder doctrine.”
    — Justice Clarence Thomas, concurring

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