ANOTHER BRICK IN THE WALL: The ‘Illinois Brick’ Co-conspirator Exception’s Treatment by United States Circuit Courts

A note by Preslav Mantchev

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The Supreme Court’s 1977 ruling in Illinois Brick Company v. Illinois profoundly shaped private antitrust enforcement at the federal level in the United States. Yet, the Supreme Court’s avoidance of subsequent questions stemming from its Illinois Brick ruling has created a circuit split regarding plaintiff standing in cases involving anticompetitive behavior by multiple co-conspirators. This Note examines the origins of this “co-conspirator” exception to Illinois Brick and analyzes the differences in the exception’s treatment by circuit courts across the United States in order to promote a clearer, more-uniform application of the legal theory going forward.