Seven companies raised more than half of all U.S. seed through growth-stage venture investment in the first 10 months of this year, capturing over $260 billion in equity funding. The companies are OpenAI, Anthropic, xAI, Anduril Industries, Databricks, Prometheus, and The Boring Co. This represents just over 50% of all U.S. seed and venture investment over the same period, according to Crunchbase data.

The founders and CEOs of these companies are exceptionally wealthy. Elon Musk founded xAI and The Boring Co., and co-founded OpenAI. Jeff Bezos launched Prometheus in 2025, which raised $12 billion earlier this year. Bezos' net worth is calculated at more than $350 billion.

OpenAI co-founder and CEO Sam Altman made his wealth primarily through investments in Y Combinator startups, including Stripe and Reddit. Co-founder Greg Brockman holds an equity stake reportedly valued around $30 billion earlier this year.

At Anthropic, all seven co-founders have similar-sized equity stakes valued in the billions, including CEO Dario Amodei.

Databricks co-founder and CEO Ali Ghodsi has a reported $7.6 billion net worth, with the company valued at around $190 billion following an August financing. Anduril co-founder and CEO Brian Schimpf has an estimated $1.5 billion net worth. Co-founder Palmer Luckey, who sold Oculus to Meta for $2 billion in 2014, has an estimated $5.9 billion net worth.

Other billionaire founders include Wonder's Marc Lore, Figure's Brett Adcock, and Surge AI's Edwin Chen.

Some billionaires became wealthy through the startup that just raised capital. Others, like Musk, Bezos, Altman, and Luckey, were already billionaires through prior companies or investments before funding their current ventures. Historically, neither type was a particularly common recipient of venture funding rounds. The term "unicorn" entered the lexicon in 2013, when the $1 billion-plus private company asset class became noticeably large. In prior decades, founders mostly hit billionaire status only after startups went public or sold in high-priced acquisitions.