Innovation & Wealth › The Gilded Age › Progressive Era reform and trust-busting
Standard Oil breakup
May 15, 1911· Event· Laws, labor & antitrust
Well documentedSolid records, texts or physical evidence.
The US Supreme Court ordered Rockefeller's Standard Oil dissolved into 34 separate companies under the Sherman Antitrust Act.
See it on the Innovation & Wealth map →What happened
Standard once refined about 90% of America's oil. The government sued in 1906; on May 15, 1911, the Court gave it six months to split up. The 34 successors included the ancestors of Exxon, Mobil, Chevron and Amoco. Shareholders got proportional stakes in each, and the shares soared, so Rockefeller's fortune grew to roughly $900 million by 1913, around $30 billion today; estimates vary. The Court also set the 'rule of reason': only unreasonable restraints of trade are illegal.
Impact on society and the economy
It remains the most famous antitrust breakup and set the test courts still use. Competitors gained room; Rockefeller and other shareholders, ironically, grew richer.
How we know
The Supreme Court's opinion (221 U.S. 1), the trial record, Bureau of Corporations reports on the oil industry, and corporate histories tracing each successor company.
Still debated
Did the breakup help consumers? Standard's share was already falling, to roughly two-thirds, as new Texas and California oil firms rose. Economists still argue.
Connections (3)
▸John D. Rockefeller and Standard Oil was split into 34 companies in Standard Oil breakupWell documented
The connection
Standard had become a New Jersey holding company controlling dozens of firms that refined most of America's oil. The 1911 ruling split it into 34 companies, the ancestors of Exxon, Mobil, Chevron, Amoco and others. Rockefeller, retired since the late 1890s, kept about a quarter of each; as their shares soared, his fortune grew rather than shrank.
When and how
Washington, May 15, 1911, with the split completed by December 1911; the 34 successors were based in New Jersey, New York, California, Indiana, Ohio and elsewhere.
How we know
The court decree, corporate records tracing each successor, and stock prices documenting the rise in value after the split.
Debates
Whether splitting Standard mostly by region created real competition is debated; successors at first rarely competed in each other's territories. Exxon and Mobil re-merged in 1999.
▸Ida Tarbell's exposé of Standard Oil built public support for Standard Oil breakupMostly agreed
The connection
Tarbell's series made Standard's tactics common knowledge and turned middle-class readers against it. That gave political cover to President Theodore Roosevelt's trust-busting. His Bureau of Corporations investigated the oil industry, and the Justice Department sued Standard in November 1906, attacking many of the same practices Tarbell had described, such as railroad rebates.
When and how
United States, 1904–1911; Tarbell, President Theodore Roosevelt, the Bureau of Corporations, and attorney Frank Kellogg, who led the government's case.
How sure are we?
The timing, the overlap between her evidence and the government's, and contemporaries' comments support the link; no document shows her articles alone triggered the suit.
Debates
Historians weigh her influence against Roosevelt's wider agenda, state lawsuits against Standard, and the Bureau's own work; she was one voice in a broad movement.
▸Sherman Antitrust Act was the law behind Standard Oil breakupWell documented
The connection
The 1890 Sherman Act banned combinations 'in restraint of trade' and monopolizing. The government charged Standard with both, and the Supreme Court agreed. But Chief Justice Edward White's opinion read the law to ban only 'unreasonable' restraints, the 'rule of reason,' which left courts to judge each case by its effects.
When and how
Supreme Court, Washington, May 15, 1911; Chief Justice White wrote for the majority; Justice John Marshall Harlan partly dissented, saying the Court was rewriting the statute.
How we know
The opinion, Standard Oil Co. of New Jersey v. United States, 221 U.S. 1, rests explicitly on Sections 1 and 2 of the Sherman Act.
Debates
Did the rule of reason make antitrust workable, or weaken it by letting judges excuse big firms? Lawyers and economists still argue.