As stated before this website only talks about successful entrepreneurs. There are plenty of entrepreneurs who are under 18 who have become successful.
What are some companies started by people under the age of 18? For example one of them would be Mo's bows which is a company started by then 14 year old Moziah Brudges which which sells a wide range of accessories for men sold at various loaction across the country. and the was advice given to him was to ‘Stay true to your brand,’ and that is important to remember because there are a lot of different opportunities that may come to a young entrepreneur, but they may not be the best for the company. Another one would be Flogg started by then 17 year old Ben Patersnak which is a social community and virtual market place for people to buy and sell items.