Copperweld Corp. et al. v. Independence Tube Corp.

Decided June 19, 1984. Warren Earl Burger delivered the opinion of the Court.

Docket 82-1260 · 467 U.S. 752 (1984) · Cited 1,375 times

Holding

Petitioner Copperweld and its wholly owned subsidiary, petitioner Regal, are incapable of conspiring with each other for purposes of 1 of the Sherman Act.

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 5–3.

“Concurring” means agreeing with the outcome; any split shown is the Court’s judgment, not each Justice’s reasoning. Source: the Supreme Court Database (Spaeth et al.), Washington University.

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.

• United States v. Yellow Cab Co. · 332 U.S. 218 (1947)
• Timken Roller Bearing Co. v. United States · 341 U.S. 593 (1951)
• Kiefer-Stewart Co. v. Joseph E. Seagram & Sons, Inc. · 340 U.S. 211 (1951)
• Perma Life Mufflers, Inc. v. International Parts Corp. · 392 U.S. 134 (1968)
• United States v. Crescent Amusement Co. · 323 U.S. 173 (1944)
• Appalachian Coals, Inc. v. United States · 288 U.S. 344 (1933)
• United States v. Parke, Davis & Co. · 362 U.S. 29 (1960)
• United States v. Griffith · 334 U.S. 100 (1948)
• United States v. Colgate & Co. · 250 U.S. 300 (1919)
• Monsanto Co. v. Spray-Rite Service Corp. · 465 U.S. 752 (1984)
• Albrecht v. Herald Co. · 390 U.S. 145 (1968)
• United States v. American Tobacco Co. · 221 U.S. 106 (1911)
• Poller v. Columbia Broadcasting System, Inc. · 368 U.S. 464 (1962)
• Continental T. v. Inc. v. GTE Sylvania Inc. · 433 U.S. 36 (1977)
• Schine Chain Theatres, Inc. v. United States · 334 U.S. 110 (1948)
• New Colonial Ice Co. v. Helvering · 292 U.S. 435 (1934)
• Associated General Contractors of California, Inc. v. California State Council of Carpenters · 459 U.S. 519 (1983)
• United States v. Turkette · 452 U.S. 576 (1981)
• United States v. Grinnell Corp. · 384 U.S. 563 (1966)
• Brunswick Corp. v. Pueblo Bowl-O-Mat, Inc. · 429 U.S. 477 (1977)
• Brown Shoe Co. v. United States · 370 U.S. 294 (1962)
• Northern Pacific Railway Co. v. United States · 356 U.S. 1 (1958)
• Illinois Brick Co. v. Illinois · 431 U.S. 720 (1977)
• United States v. E. I. Du Pont De Nemours & Co. · 351 U.S. 377 (1956)
• American Tobacco Co. v. United States · 328 U.S. 781 (1946)
• Great American Federal Savings & Loan Ass'n v. Novotny · 442 U.S. 366 (1979)
• Nye & Nissen v. United States · 336 U.S. 613 (1949)
• National Society of Professional Engineers v. United States · 435 U.S. 679 (1978)
• Jefferson Parish Hospital District No. 2 v. Hyde · 466 U.S. 2 (1984)
• Hyde v. United States · 225 U.S. 347 (1912)

Cited by

Later Supreme Court opinions in our collection that cite this case.

• Ziglar v. Abbasi · 582 U.S. 120 (2017)
• Ashcroft v. Iqbal · 556 U.S. 662 (2009)
• Bell Atlantic Corp. v. Twombly · 550 U.S. 544 (2007)
• Leegin Creative Leather Products, Inc. v. PSKS, Inc. · 551 U.S. 877 (2007)
• Apple, Inc. v. Pepper · 587 U.S. 273 (2019)
• Atlantic Richfield Co. v. USA Petroleum Co. · 495 U.S. 328 (1990)
• Spectrum Sports, Inc. v. McQuillan · 506 U.S. 447 (1993)
• National Collegiate Athletic Assn. v. Alston · 594 U.S. 69 (2021)
• Teague v. Lane · 489 U.S. 288 (1989)
• K Mart Corp. v. Cartier, Inc. · 486 U.S. 281 (1988)
• Cedric Kushner Promotions, Ltd. v. King · 533 U.S. 158 (2001)
• Texaco Inc. v. Dagher · 547 U.S. 1 (2006)
• Fisher v. City of Berkeley · 475 U.S. 260 (1986)
• Ohio v. American Express Co. · 585 U.S. 529 (2018)

Official text

Read the official opinion (U.S. Reports, govinfo.gov)

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Source: Supreme Court of the United States, slip opinions (1984). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-03. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).