You might be assuming small businesses have less than ten people. That’s a category of small business called a “micro-business” or microenterprise, depending on funding model.
In EU where I'm from the micro/small/medium business sizes are tied to both employee count AND revenue. Micro is below 10 employees and below 2 million € revenue, Small is below 50 employees and below 10 million € revenue, Medium is below 250 employees and 50 million € revenue.
So if you had 100 million revenue you would be a large business even if you had less than ten people.