Monopoly Stocks

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Who really runs the market?

Companies That Dominate Industries

Most markets aren't won — they're captured. A handful of companies quietly control huge slices of the industries we use every day, from search and semiconductors to soda and salvage yards. Substox tracks the public and private giants whose pricing power, distribution networks, and barriers to entry make them the unofficial landlords of their categories.

Four Categories of Market Dominance

Monopolies

A single dominant player controls the lion's share of an industry — think Alphabet in search, NVIDIA in GPUs, or ASML in EUV lithography. 9 companies tracked.

View monopolies

Duopolies

Two companies split a market between them — Visa and Mastercard, Boeing and Airbus, Home Depot and Lowe's. Competition exists, but only between giants. 14 duopolies tracked.

View duopolies

Oligopolies

A small group of firms — typically three to five — controls most of the market. The Big Four banks, the Big Three telecoms, the cloud-computing trio. 24 oligopolies tracked.

View oligopolies

Private Monopolies

Some of the most dominant companies aren't publicly traded — DJI, Mars, the Big Four accounting firms, Rolex. You can't buy their stock, but you can invest around them. 10 private giants tracked.

View private monopolies

Five-Year Track Record

How Dominant Companies Have Performed

Dominant companies tracked

Profitable over 5 years

% with inelastic demand

% with elastic demand

While beating the S&P 500 in the long run is extremely difficult, 80 of the 109 industry-dominating companies Substox tracks have been profitable over the last five years. Companies with inelastic demand — essentials people can't easily walk away from — have outperformed those with elastic demand by a notable margin.

Questions people ask

Common Questions

What counts as a monopoly, a duopoly and an oligopoly?

A monopoly is one company controlling nearly all of a market. A duopoly is two companies splitting it. An oligopoly is a small group dominating between them. Substox groups companies this way because market structure shapes pricing power, and pricing power outlasts any single quarter of earnings.

How many does Substox cover?

9 monopolies, 14 duopolies, 24 oligopolies and 10 private monopolies — companies that dominate a market but have no shares to buy.

Are dominant companies automatically good investments?

No. Dominance can attract regulators, invite antitrust action, and make a company complacent. It is one input among many. Substox is an educational resource, not a licensed financial adviser, and nothing here is investment advice.