Peter Thiel, a prominent tech investor and entrepreneur, is best known as a co-founder of PayPal, Palantir Technologies, and Founders Fund. He was also the first outside investor in Facebook. As of late 2024, Thiel's net worth is estimated to range between $3.9 billion and $11.2 billion, depending on valuation sources. His wealth is largely tied to his investments in companies like Palantir Technologies.