Royal Canin U. S. A. v. Wullschleger

Decided January 15, 2025. Elena Kagan delivered the opinion of the Court.

Docket 23-677 · 604 U.S. 22 (2025) · Cited 403 times

Holding

When a plaintiff amends her complaint to delete the federal-law claims that enabled removal to federal court, leaving only state-law claims behind, the federal court loses supplemental jurisdiction over the state claims, and the case must be remanded to state court.

The Court’s statement of the holding, from the opinion’s syllabus. The syllabus is prepared by the Reporter of Decisions and is not part of the opinion of the Court. Read the official opinion for authority.

How the Justices voted

Decided 9–0.

“Concurring” means agreeing with the outcome; any split shown is the Court’s judgment, not each Justice’s reasoning. The lineup is the syllabus’s disposition of who wrote and joined each opinion. Source: the opinion’s syllabus (supremecourt.gov).

Precedents cited

Supreme Court decisions this opinion relies on, ordered by how often it cites each. Cases in our collection link through; others are named.

• Rockwell International Corp. v. United States · 549 U.S. 457 (2007)
• Carnegie-Mellon University v. Cohill · 484 U.S. 343 (1988)
• Gunn v. Minton · 568 U.S. 251 (2013)
• United Mine Workers of America v. Gibbs · 383 U.S. 715 (1966)
• Owen Equipment & Erection Co. v. Kroger · 437 U.S. 365 (1978)
• Newman-Green, Inc. v. Alfonzo-Larrain · 490 U.S. 826 (1989)
• Pegram v. Herdrich · 530 U.S. 211 (2000)
• Kokkonen v. Guardian Life Insurance Co. of America · 511 U.S. 375 (1994)
• Caterpillar Inc. v. Williams · 482 U.S. 386 (1987)
• Arbaugh v. Y & H Corp. · 546 U.S. 500 (2006)
• Franchise Tax Bd. of Cal. v. Construction Laborers Vacation Trust for Southern Cal. · 463 U.S. 1 (1983)
• Saint Paul Mercury Indemnity Co. v. Red Cab Co. · 303 U.S. 283 (1938)
• Exxon Mobil Corp. v. Allapattah Services, Inc. · 545 U.S. 546 (2005)
• Caterpillar Inc. v. Lewis · 519 U.S. 61 (1996)
• Henderson v. Shinseki · 562 U.S. 428 (2011)
• Rosado v. Wyman · 397 U.S. 397 (1970)
• Grupo Dataflux v. Atlas Global Group, L. P. · 541 U.S. 567 (2004)
• United States v. Detroit Timber & Lumber Co. · 200 U.S. 321 (1906)
• Freeport-McMoRan Inc. v. K N Energy, Inc. · 498 U.S. 426 (1991)
• Powerex Corp. v. Reliant Energy Services, Inc. · 551 U.S. 224 (2007)
• Anderson v. Watt · 138 U.S. 694 (1891)
• Wilkins v. United States · 598 U.S. 152 (2023)

Official text

Read the official opinion (PDF, supremecourt.gov)

Explore from here

Elena Kagan’s profile · All Supreme Court opinions · The Supreme Court

Source: Supreme Court of the United States, slip opinions (2025). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-08-15. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).