Start With What You Can Actually Buy
Investable Companies
Private Companies
Countries & Continents
Monopoly Stocks
Emerging Trends
Substox by the Numbers
Public companies tracked
Private companies mapped
Monopoly & oligopoly groups
Emerging trends covered
About Substox
Substox was built on a simple idea — most people don't truly know which companies they can invest in. Many well-known brands are owned by larger publicly traded corporations, and understanding those ownership structures is the foundation of confident investing.
Our platform gives clear insight into which companies are publicly traded, which are privately held, and how major holding companies shape the modern economy. By improving financial literacy and simplifying complex ownership networks, Substox helps investors at every level make more informed decisions.
Common Questions
What does Substox actually tell me?
Search any brand and Substox tells you whether you can buy shares in it. If the company is publicly traded you get its ticker, sector, country and market cap. If it is private, you get who owns it and which listed companies give you the closest exposure instead.
How many companies are in the database?
Substox tracks 23,209 companies: 4,669 publicly traded and 18,540 private, joined by 18,815 ownership links. Those links are what let the site answer “who owns this brand?” rather than just “does this brand exist?”
Is it free, and do I need an account?
Free, and no account. Substox earns affiliate commissions on some outbound links, which never changes what the data says about a company.
Does Substox tell me what to buy?
No. Substox is an educational resource, not a licensed financial adviser, and nothing here is investment advice. The site shows you what is investable and who owns what so you can do your own research, and you should confirm anything important with a qualified professional.