William Henry Gates III is an American business magnate, software developer, investor, author, and philanthropist. He is a co-founder of Microsoft Corporation. Bill Gates is continuously standing number 1 as world billionaire in the world by Forbes magazine. His IQ Test score is 160 IQ, Bill Gates is a billionaire who always contribute to the world and do charity frequently. Bill Gates is no longer the world's second-richest person. That title goes to Elon Musk, who unseated Gates as the world's second wealthiest in November. But Gates is still pretty wealthy, with an estimated net worth of $129 billion. He's one of three people in the world with a net worth exceeding $100 billion.