In October 2025, Forbes reported that the three founders of Mercor, an AI hiring startup, had become the youngest self-made billionaires on record. Brendan Foody, Adarsh Hiremath, and Surya Midha are all 22. They met as school kids on debate teams, skipped college with Thiel Fellowships, which pay young people 100,000 dollars to build companies instead, and started Mercor to match experts with AI labs that need people to train and test their models.
The number behind the headline: investors put 350 million dollars into Mercor in a round led by Felicis Ventures, at a valuation of 10 billion dollars. Forbes estimates each founder still owns roughly 22 percent, which is what makes each stake worth more than a billion on paper.
Here is how a valuation works. When investors pay 350 million dollars for a small slice of a company, the price of that slice sets a price for every other slice. Multiply across all the slices and you get 10 billion. Nobody handed the founders a billion in cash. The money that actually moved went into the company to spend on growth.
The gap most headlines skip over is the difference between price and cash. Shares in a private company are hard to sell, the price was set by a handful of buyers in one deal, and it can fall as fast as it rose. The revenue numbers underneath are also the company's own: Mercor says it reached a 500 million dollar annualised run rate in September and pays its experts about 1.5 million dollars a day. A run rate takes recent income and multiplies it out to a full year, so it measures speed, not money in the bank. Private companies do not publish audited accounts, so outsiders cannot fully check any of it.
Investors buy a slice
350 million dollars bought a small piece of Mercor.
The slice prices the whole
That deal implies 10 billion dollars for all the slices together.
Founders' shares inherit the price
Forbes estimates each stake at well over a billion, on paper.
Cash arrives only at a sale
Until shares are actually sold, the number can move either way.
The same arithmetic applies to every startup valuation headline you will ever read.
The skill this story teaches is translation. When you read that a company is worth 10 billion dollars, translate it to: the most recent investors paid a price that implies 10 billion, for now. When you read billionaire, ask whether the wealth is a bank balance or a price tag on shares that have never been sold.
What should survive the translation is the build itself. Three people spent years on a skill, arguing and researching competitively on debate teams. They spotted a gap: AI labs suddenly needed thousands of qualified experts, faster than job boards and recruiters could supply them. They built software that matches experts to labs in days instead of weeks, and real customers pay for it. That part of the story stays true wherever the valuation goes next.
Tradeoffs
- A high valuation buys attention and hiring power, but it raises the bar the company must now clear.
- Run rates show speed, but one strong month can flatter a whole year.
- Skipping college worked for these three, but the fellowship model picks people who already had rare skills and backers.
Try this
Next time you see a headline saying a company is worth billions, find what the investors actually paid in the round. Write both numbers side by side and explain the difference to someone in two sentences.