Copperweld Corp. v. Independence Tube Corp.
Copperweld Corp. v. Independence Tube Corp., 467 U.S. 752 (1984), is a major US antitrust law case decided by the Supreme Court concerning the Pittsburgh firm Copperweld Corporation and the Chicago firm Independence Tube. It held that a parent company is incapable of conspiring with its wholly owned subsidiary for purposes of Section 1 of the Sherman Act because they cannot be considered separate economic entities. Section 1 of the Sherman Act states that "Every contract, combination in the form of trust or otherwise, or conspiracy, in restraint of trade or commerce among the several States, or with foreign nations, is declared to be illegal." However, for a condition of conspiracy to exist, there must be at least two parties involved. Copperweld held that separate incorporation was not enough to render a parent and its subsidiary capable of conspiring, since forcibly the economic interests of a wholly owned subsidiary must be those of its parent. It does not apply to partially owned subsidiaries. Facts
Independence Tube commenced a civil action under Section 1 of the Sherman Act against Copperweld Corporation, its wholly owned subsidiary (" Regal Tube Corporation"), and a third-party company that supplied mill  ("Yoder Company"). Amongst others, Independence Tube claimed that Copperweld Corporation and Regal Tube Corporation had induced Yoder Company to breach a supply contract with Independence Tube to provide a tubing mill. This led to a nine months delay in Independence Tube's entry into the steel tubing business. The Supreme Court considered whether Independence Tube's claim under Section 1 of the Sherman Act could succeed in relation to coordinated acts of a parent and its wholly owned subsidiary. Judgment
The Supreme Court, in an opinion by Chief Justice Burger and joined by Justices Blackmun, Powell, Rehnquist and O'Connor, held that an agreement between a wholly owned subsidiary and a parent did not fall under the definition of an "agreement" in Section 1 of the Sherman Act because the two companies, while legally separate, constituted a single economic entity. The majority also observed that Section 1 of the Sherman Act only applied to concerted action between two (or more) independent firms:

Justice Stevens, joined by Justices Brennan and Marshall, dissented. See also

US antitrust law

Notes

External links
 

United States Supreme Court cases
United States Supreme Court cases of the Rehnquist Court
United States Supreme Court decisions that overrule a prior Supreme Court decision
United States antitrust case law
Anti-competitive practices
1984 in United States case law