Today in History—September 29: John D. Rockefeller Becomes the World’s First Billionaire

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September 29, 1916: The government broke up Rockefeller's oil monopoly

Today in History—September 29: John D. Rockefeller Becomes the World’s First Billionaire: References & Edit History

Article Contributors

Primary Contributors

Doug Ashburn

Other Encyclopedia Britannica Contributors

Mindy Johnston

Article History

Type	Description	Contributor	Date
	Media added.	Mindy Johnston	Sep 24, 2026
	New article added.	Mindy Johnston Doug Ashburn	Sep 23, 2026