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Events on Monday 15 May 1911 1
1911Standard Oil Antitrust BreakupUS Supreme Court orders the dissolution of Standard OilThe US Supreme Court ruled on 15 May 1911 that Standard Oil violated the Sherman Antitrust Act and ordered it broken into 34 independent companies. The decision reshaped American corporate law and ended John D. Rockefeller's oil monopoly. Several successor firms later became ExxonMobil, Chevron, and Marathon.