In the United States v. Reading Company case of 1912, the Supreme Court ruled that a holding company which controlled coal mines and railroads was in violation of the Sherman Antitrust Act. The Reading Company had created a monopoly by controlling both production (coal mining) and distribution (rail transport), thereby suppressing competition. The court found that this arrangement allowed for price manipulation and restricted trade, violating federal antitrust laws designed to promote fair business practices and protect consumers from predatory behavior. This decision reinforced the government's power to regulate monopolies, particularly those involving vertical integration where one entity controls multiple stages of production or supply chain within an industry.

In the dissenting opinion for United States v. Reading Company, it was argued that the majority's interpretation of the Sherman Antitrust Act was overly broad and could potentially criminalize normal business practices. The dissenters believed that not all forms of competition should be considered illegal under this law, especially if they do not involve monopolistic or predatory behavior. They also expressed concern about how such an expansive reading of the law might impact economic growth and innovation in America's rapidly industrializing economy at that time. Furthermore, they disagreed with the majority's view on what constitutes a "restraint of trade," arguing instead for a narrower definition based on historical precedent and common law principles.