41-year-old who just completed the first civilian spacewalk dropped out of high school to start his $7 billion business

Billionaire Jared Isaacman made history in space — again.

On Thursday, Isaacman spent 10 minutes floating in the vacuum of space outside of a SpaceX capsule. Isaacman, the billionaire CEO and founder of payment processing company Shift4 Payments, is part of the first-ever all-civilian spacewalk — three years after he led a 2021 SpaceX mission as commander of the world's first all-civilian mission to reach orbit.

Both private space missions were funded for undisclosed sums by Isaacman, who boasts an estimated net worth of $1.9 billion, according to Forbes.

"I decided I was going to go to space when I was 5 [years old]. I was pretty calculated about it at that point, it just took me a little while to get it into motion," Isaacman told CNBC Make It in 2021.

Isaacman, 41, is an accomplished pilot who set a world record in 2009 for the fastest around-the-world flight in a light jet. He's a longtime advocate for the expansion of the private space industry, which he says could lead to "a world where everybody can go and venture among the stars."

Here's how he went from teenage entrepreneur, running a business he founded in his parents' New Jersey basement, to a billionaire floating in space.

As a teenager, Isaacman's computer skills helped him land an IT consulting job at a payment processing firm, causing him to drop out of high school. Within months, the 16-year-old decided to create a rival company, simplifying his clients' experience by having business owners fill out their applications online.

He used a $10,000 check from his grandfather as seed money and set up shop in his childhood home's basement. "$10,000, you know, you needed to build a couple of computers," Isaacman said. "That wasn't expensive. And, you needed some phones,