Standard Oil breakup (1911)
The Supreme Court ordered Standard Oil, which controlled roughly 90% of US refining, dissolved into 34 separate companies under the Sherman Act.
Standard Oil's component companies, among them the predecessors of Exxon and Chevron, became the giants of the modern oil industry.
The case established that US antitrust law applies to oil market concentration, a principle the FTC still enforces more than a century later.
Today's suits test a different question: whether US antitrust law can police coordination between domestic producers and a foreign cartel, rather than monopoly within one company.
