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Illinois Attorney General Lisa Madigan
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Protecting Consumers

Antitrust Bureau

Antitrust laws exist to prohibit trade restraints that decrease competition among those engaged in commerce and trade. Competition is a vital part of our free enterprise system. It rewards the industrious and encourages innovation and efficiency. When businesses compete, consumers benefit from goods or services of higher quality at lower prices than would be available in the absence of competition.

The Illinois Antitrust Act was enacted in 1965. It is designed to supplement the federal antitrust laws in securing the benefit of free and open competition to Illinois businesses and consumers. The mission of the Antitrust Bureau of the Illinois Attorney Generalís Office is to enforce both state and federal antitrust laws for the benefit of Illinois consumers, businesses and governmental entities.


Check this page for updates on antitrust settlements and possible relief for Illinois residents and businesses.

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