When corporations fix prices, divide markets, or abuse monopoly power, antitrust class actions protect competition and recover overcharges for consumers and businesses.
Antitrust class actions are lawsuits filed on behalf of consumers, businesses, or other purchasers who were harmed by anticompetitive conduct. The most common antitrust violation is price-fixing — when competing companies secretly agree to set prices above competitive levels. But antitrust law also targets market allocation (dividing territories or customers), bid rigging (coordinating bids on contracts), monopolization, and tying arrangements.
The legal foundation for antitrust class actions rests on the Sherman Antitrust Act of 1890 and the Clayton Act of 1914. Section 1 of the Sherman Act prohibits agreements that restrain trade, while Section 2 targets monopolization. The Clayton Act provides the private right of action that makes class actions possible, including the powerful treble damages provision — successful plaintiffs recover three times their actual losses.
Antitrust class actions frequently follow government investigations. When the Department of Justice or a foreign competition authority uncovers a price-fixing cartel, private plaintiffs use the government's evidence as a roadmap for their class action. These "follow-on" cases benefit from the government's investigative resources and can leverage guilty pleas or convictions as evidence. Antitrust settlements are among the largest in class action history, often reaching into the billions of dollars.
Competing companies secretly agree to set prices at artificial levels, eliminating price competition. Per se illegal under the Sherman Act — no justification is accepted. Common in commoditized industries like chemicals, auto parts, and generic pharmaceuticals.
Competitors agree to divide customers, territories, or product markets among themselves to avoid competing. Each company gets a "protected" area where it can charge monopoly prices. Like price-fixing, this is per se illegal.
Companies that should be competing for contracts instead coordinate their bids, with pre-selected "winners" and artificially high prices. Common in government contracting, construction, and procurement. Often investigated by the DOJ as a criminal offense.
A dominant company uses exclusionary practices to maintain or extend its monopoly power. Unlike price-fixing, monopolization requires showing both market power and anticompetitive conduct — not just bigness. The DOJ's cases against Google and Apple are recent examples.
A company with market power in one product forces customers to also buy a separate product they may not want. Tying is illegal when the seller has significant power in the "tying" product and the arrangement forecloses substantial commerce in the "tied" product.
Major LCD panel manufacturers — including Samsung, LG, AU Optronics, and Sharp — conspired to fix prices of thin-film transistor liquid crystal display (TFT-LCD) panels used in TVs, monitors, and laptops. The DOJ imposed over $1.39 billion in criminal fines, and private class action settlements exceeded $1.1 billion. Several executives served prison time.
Major global banks manipulated the London Interbank Offered Rate (LIBOR), a benchmark interest rate used to set trillions of dollars in financial instruments. Class actions by investors, municipalities, and borrowers alleged that artificial suppression of LIBOR reduced returns on investments and affected loan costs worldwide.
Merchants sued Visa and Mastercard alleging that the payment networks and their member banks conspired to fix interchange fees (swipe fees) and imposed rules preventing merchants from steering customers to lower-cost payment methods. The settlement — one of the largest antitrust recoveries in history — was approved after years of contentious litigation.
Japanese auto parts manufacturers conspired to fix prices on dozens of components including seatbelts, airbags, steering wheels, and electrical systems sold to automakers. The DOJ charged over 60 companies and 80 individuals. Private class actions by automakers and indirect purchasers (car buyers) resulted in over $1.2 billion in settlements.
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