NutriSystem

• $545.5 million in revenue in 2016

Remember Marie Osmond and her 50-pound weight loss? The celebrity spokeswoman not only endorsed the brand, but also kept the weight off with NutriSystem. Millions of other people wanting to shed pounds have also used NutriSystem weight management system. In 2017, the company's market value was estimated at $1.6 billion, according to The Wall Street Journal.