Large-cap companies are those with a market capitalization of $10 billion or more. They are usually well-established companies with a long history of success. Many large-cap companies are household names, like Apple, Microsoft, and Amazon. These companies are often leaders in their respective industries. They usually have a wide array of products and services, and they are often global in scope. Investing in large-cap companies can be a great way to get stability and growth potential. Because these companies are so well-established, they tend to be less risky than small-cap or mid-cap companies. And, because they are often leaders in their industries, they often have a lot of room to grow. While there may be some ups and downs along the way, investing in large-cap companies can be a great way to build your portfolio.