The largest sole proprietorship is a business owned and operated by a single individual. This type of business is the simplest form of ownership, as the individual is the sole owner and is responsible for all aspects of the business. The largest sole proprietorship is measured by its annual sales and/or number of employees. The largest sole proprietorship in the United States is Cargill, Inc, which has annual sales of $114.7 billion and employs over 150,000 people. Other large sole proprietorships include Walmart, Amazon, and Microsoft. These companies are successful due to their ability to provide high-quality products and services.