Ancillary or pendent jurisdiction: Supreme Court decisions

Every U.S. Supreme Court decision from the 1946 through 2025 Terms that the Supreme Court Database classifies under the issue “Ancillary or pendent jurisdiction,” part of the Judicial Power area.

7decisions

57%favorable to the petitioner

29%unanimous

0altered precedent or struck a law

Decisions by decade

1960s1

1970s2

1980s1

1990s1

2000s2

Most majority opinions

Sandra Day O'Connor2

Anthony M. Kennedy1

Potter Stewart1

William H. Rehnquist1

William J. Brennan Jr.1

Legal provisions most often involved

28 U.S.C. § 13673

28 U.S.C. § 13321

42 U.S.C. § 1983 (Reconstruction Civil Rights Acts)1

All 7 decisions, newest first

Exxon Mobil Corporation v. Allapattah Services, Inc.
545 U.S. 546Decided June 23, 20055–4Anthony M. Kennedy
Lance Raygor and James Goodchild v. Regents of the University of Minnesota
534 U.S. 533Decided February 27, 20026–3Sandra Day O'Connor
City of Chicago v. International College of Surgeons
522 U.S. 156Decided December 15, 19977–2Sandra Day O'Connor
Schmidt v. Oakland Unified School District
457 U.S. 594Decided June 21, 19829–0Per curiam
Owen Equipment & Erection Co. v. Kroger
437 U.S. 365Decided June 21, 19787–2Potter Stewart
Aldinger v. Howard
427 U.S. 1Decided June 24, 19766–3William H. Rehnquist
United Mine Workers of America v. Gibbs
383 U.S. 715Decided March 28, 19668–0William J. Brennan Jr.

Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error