The section of the Clayton Antitrust Act prohibiting any person from simultaneously serving as an officer or on the board of directors of competing corporations (known as an interlocking directorate or interlock). Section 8 prohibits interlocks if the corporations are engaged in commerce and have capital, surplus, and profits exceeding certain thresholds, as revised annually by the Federal Trade Commission (FTC). Certain safe harbors and exemptions apply to Section 8, including based on the degree of competition between the corporations.

For more information, see Practice Note, Interlocking Directorates and Annual Interlocking Directorates Threshold Adjustment Chart.