“At its peak, the English East India Company was by far the largest corporation of its kind,” says Emily Erikson, a sociology professor at Yale University, Director of the Fox International Fellowship, and author of Between Monopoly and Free Trade: The English East India Company.

While modern tech giants are often discussed, the British East India Company (EIC) is widely considered the largest and most powerful monopoly in world history. Founded in 1600 by royal charter, the EIC eventually grew to control nearly half of the world's trade, particularly in silk, cotton, indigo dye, sugar, salt, spices, and opium. At its peak in the 18th and 19th centuries, the company evolved from a mere trading body into a "nation-state" with its own private army of 260,000 soldiers—twice the size of the British Army at the time. It effectively ruled large portions of India and influenced global politics for over two centuries. In the American context, John D. Rockefeller’s Standard Oil is the most famous industrial monopoly; at its height in the early 1900s, it controlled approximately 90% of all oil refineries and pipelines in the United States. These historic monopolies were eventually dismantled by government intervention (the EIC by the British Crown and Standard Oil by the U.S. Supreme Court), leading to the modern anti-trust laws that govern the competitive global marketplace we see today in 2026.