The modern American dream is evolving, and nowhere is that more evident than in the meteoric rise of young billionaires under 40. These dynamic individuals are reshaping industries, driving innovation, and redefining what it means to build wealth in the 21st century. From tech giants to crypto pioneers and retail heirs, the youngest billionaires in America are more than just wealthy—they’re trailblazers in their respective fields. With vision, boldness, and often a dose of luck, they’ve reached financial heights that most only dream of, all before turning 40.
This list showcases the Top 10 richest young Americans, highlighting both self-made billionaires in the USA and those born into legacy fortunes who are now charting their own course. These individuals have capitalized on modern platforms like cryptocurrency, mobile tech, and e-commerce to build billion-dollar empires. While some, like Snap founders, are considered young tech billionaires, others gained wealth through inheritance but still contribute to shaping industries. If you’re curious about the American billionaires under 40 making headlines in 2025, read on to discover how each carved their name into the elite list of the youngest billionaires in America.
Top 10 Youngest Billionaires in America
The landscape of American wealth is evolving rapidly, with a new generation of entrepreneurs making their mark. These individuals have leveraged technology, innovation, and bold vision to amass fortunes at a remarkably young age. In this article, we delve into the lives and achievements of the top 10 youngest billionaires in America as of 2025.
From tech prodigies to heirs of retail empires, these billionaires exemplify the diverse paths to immense wealth in the modern era. Their stories offer insights into the entrepreneurial spirit driving America’s economic future.
1. Lukas Walton – Age: 38
Net Worth: $33.9 billion Source of Wealth: Inherited (Walmart)
Lukas Walton, grandson of Walmart founder Sam Walton, inherited his wealth following his father’s tragic death in a plane crash. Despite his immense fortune, Walton has chosen a path of philanthropy, focusing on environmental and social causes through the Walton Family Foundation. He does not hold an active role in Walmart’s operations but continues to influence the company’s philanthropic endeavors.
2. Josh Kushner – Age: 39
Net Worth: $3.8 billion Source of Wealth: Self-made (Venture Capital)
Josh Kushner founded Thrive Capital, a venture capital firm that has invested in high-profile tech companies like Instagram, Spotify, and Slack. His strategic investments have positioned him as a significant figure in the tech industry. Kushner is also known for his philanthropic efforts and his marriage to model Karlie Kloss.
3. Evan Spiegel – Age: 35
Net Worth: $7.1 billion Source of Wealth: Self-made (Snapchat)
Evan Spiegel co-founded Snap Inc., the parent company of Snapchat, which revolutionized social media with its ephemeral messaging and augmented reality features. Under his leadership, Snap has grown into a major player in the tech industry. Spiegel’s innovative approach continues to influence digital communication trends.
4. Robert Murphy – Age: 33
Net Worth: $7.6 billion Source of Wealth: Self-made (Snapchat)
As the co-founder and CTO of Snap Inc., Robert Murphy played a pivotal role in developing Snapchat’s technology. His expertise in engineering has been instrumental in the app’s success and its continuous innovation in the social media space. Murphy’s contributions have solidified his position as a leading figure in tech entrepreneurship.
5. Fred Ehrsam – Age: 33
Net Worth: $3.5 billion Source of Wealth: Self-made (Coinbase)
Fred Ehrsam co-founded Coinbase, one of the leading cryptocurrency exchanges, which has played a significant role in bringing digital currencies to the mainstream. Following his success with Coinbase, Ehrsam established Paradigm, a cryptocurrency investment firm, further cementing his influence in the blockchain and digital finance sectors.
6. Ernest Garcia III – Age: 42
Net Worth: $9.3 billion Source of Wealth: Self-made (Carvana)
Ernest Garcia III founded Carvana, an online platform that revolutionized the used car buying experience by allowing customers to purchase vehicles entirely online. The company’s innovative approach has disrupted the traditional automotive sales model, leading to significant growth and recognition in the industry.
7. R.J. Scaringe – Age: 38
Net Worth: $3.4 billion Source of Wealth: Self-made (Rivian)
R.J. Scaringe is the founder and CEO of Rivian, an electric vehicle manufacturer that has emerged as a formidable competitor to Tesla. Under his leadership, Rivian has focused on producing electric trucks and SUVs, attracting significant investment and attention in the sustainable transportation sector. Business Insider India
8. Nikil Viswanathan – Age: 36
Net Worth: $1.8 billion Source of Wealth: Self-made (Alchemy)
Nikil Viswanathan co-founded Alchemy, a blockchain infrastructure company that provides tools and services for developers building decentralized applications. The company’s platform has become integral to the growth of the Web3 ecosystem, positioning Viswanathan as a leading figure in blockchain technology.
9. LeBron James – Age: 40
Net Worth: $1 billion | Source of Wealth: Athlete (NBA)
LeBron James is not just a legendary basketball player but a savvy businessman. He reached billionaire status through endorsements, equity deals (like Blaze Pizza), and entertainment ventures. From sports to Hollywood, LeBron diversified his portfolio with strategic investments. He stands out on this list as someone who leveraged fame into long-term financial power. LeBron’s journey is proof that athletic success can be parlayed into a diversified, enduring empire.
10. Jonathan Kwok – Age: 37
Net Worth: $2.3 billion Source of Wealth: Inherited (Real Estate, U.S. Tech)
Jonathan Kwok, though primarily known for his family’s real estate empire in Asia, holds significant investments in U.S.-based tech and venture capital. With dual residency and expanding influence in American business circles, he’s increasingly seen among the top 10 richest young Americans lists with international roots. His story highlights how global billionaires are investing heavily in the U.S. tech space to diversify and scale.
