There are 33 billionaires under 50 on this year’s ranking, up from 26 in 2024. The ten youngest are age 42 and under, the same as last year because of four new youngsters. The ranking’s youngest member of all, Surge AI founder Edwin Chen (who is 37 years old), is new to the list this year, as are Robinhood cofounder Vlad Tenev (38), early AppLovin investor Eduardo Vivas (39) and Coreweave cofounder Brian Venturo (40). (A fifth, Tenev’s Robinhood cofounder Baiju Bhatt, who is 40, returned to The Forbes 400 after appearing once before, in 2021.)
Chen, Tenev, Vivas and Walmart heir Lukas Walton, who was the youngest billionaire on last year’s list, are the only thirtysomethings this year, bringing that total to four, up from two in 2024, with venture capitalist Josh Kushner (40) aging out of the group. While Kushner is the son of New York real estate mogul Charles Kushner, he made his billions with his VC firm Thrive Capital, leaving Walton as the only one of The Forbes 400’s ten youngest members in 2025 who inherited his fortune.
In all, these ten youthful billionaires are worth nearly $357 billion, up from $273 billion in 2024. Most of that sum—and nearly all of the $84 billion gain—is due to one person: Mark Zuckerberg. The 41-year-old Meta chief ranks as the United States’ third-richest person, worth $253 billion after adding $72 billion to his fortune over the past year.

Net worths are as of September 1, 2025

10. Nathan Blecharczyk

Age: 42 | Net worth: $8.7 billion | Source of wealth: Airbnb

The youngest of Airbnb’s three billionaire cofounders, who are all on The Forbes 400, Blecharczyk helped launch the rental site 18 years ago with an air mattress on an apartment floor; since then, Airbnbers have hosted 2 billion guests across more than 220 countries. Blecharczyk was once Airbnb’s first engineer and remains the “head of all things technical.”

9. Mark Zuckerberg

Age: 41 | Net worth: $253 billion | Source of wealth: Facebook

Zuckerberg’s year has been defined by upheaval, both in his reorganization of Meta’s leadership and in the company’s quest for AI dominance. In June he spent $14 billion to buy 49% of Scale AI and installed its cofounder and former CEO as head of Meta’s new AI lab. He also reportedly granted $1 billion pay packages to two high profile AI hires and poached 18 employees from OpenAI, some of whom have already left Meta. Meanwhile, shares of Meta, the parent company of Facebook—which Zuck started in his Harvard dorm at age 19—are up 42% since last year’s list, adding $72 billion to his net worth.

8. Dustin Moskovitz

Age: 41 | Net worth: $12 billion | Source of wealth: Facebook

Muskovitz helped launch Facebook in 2004 with his then-roommate, Zuckerberg, who is just 8 days older. He did programming at the social network before rising to the role of chief technology officer but left in 2008 and cofounded workflow software firm Asana, which he took public in 2020. With his wife Cari Tuna, he runs the Good Ventures Foundation, which has $8 billion in assets. In total, Moskovitz and Tuna have doled out approximately $3.9 billion to causes ranging from biosecurity to effective altruism.

7. Brian Venturo

Age: 40 | Net worth: $4.2 billion | Source of wealth: Cloud computing

Venturo is cofounder and chief strategy office of CoreWeave, originally a crypto-mining venture that has since transformed into a fast-growing force in AI cloud infrastructure, delivering high-performance computing for blockchain and generative AI. Venturo debuts on The Forbes 400 thanks to his nearly 7% stake in the company, which went public in March and has seen its market capitalization more than double to nearly $50 billion since.

6. Baiju Bhatt

Age: 40 | Net worth: $6 billion | Source of wealth: Stock trading app

The son of an Indian immigrant scientist who worked for NASA, Bhatt grew up in a household where English was a second language and money was tight. He went on to cofound stock trading app Robinhood with fellow Forbes 400 member Vlad Tenev in 2013 and took the company public at the height of the Covid-19-fueled meme stock mania in 2021. Bhatt served as co-CEO with Tenev until 2020, when he transitioned into the role of chief creative officer. Bhatt stepped down from his executive position in 2024 but still serves on Robinhood’s board and owns a 6% stake. The company’s stock has soared by 400% in the past year due to a boost in crypto-related sales, a wave of new products from IRAs to high-yield savings accounts, and Robinhood raking in $3 billion in revenue in 2024.

5. Josh Kushner

Age: 40 | Net worth: $5.2 billion | Source of wealth: Venture capital

Born into a real estate dynasty, married to model Karlie Kloss and brother-in-law to Ivanka Trump, Kushner is hardly short of influential connections. Still, Kushner made his own mark with Thrive Capital, the VC firm he founded and runs, which manages more than $15.5 billion of assets and has backed winners like Stripe and OpenAI.

4. Eduardo Vivas

Age: 39 | Net worth: $3.8 billion | Source of wealth: Marketing software, mobile games

Vivas dropped out of high school in 10th grade and spent three years packing bags in a warehouse before having the idea to charge companies for making targeted ads. He went on to found Bright.com, a site that uses AI to match job seekers with employers, which was acquired by LinkedIn in 2014. Vivas also cofounded marketing company Social Hour and sold it for $51.5 million in 2012. Two of his Social Hour cofounders later launched a marketing software and mobile game maker called AppLovin and Vivas signed on as an early investor and board member in 2018. He now owns a nearly 2% stake in AppLovin worth $3.5 billion.

3. Lukas Walton

Age: 38 | Net worth: $39.8 billion | Source of wealth: Walmart

A grandson of Walmart founder Sam Walton (d. 1992), he inherited about a third of his father John Walton’s estate after John died in a 2005 plane crash. A childhood cancer survivor, Lukas owns stakes in Walmart and the family’s $27 billion (assets) Arvest Bank Group but does not work for either company. Instead, he founded and runs Builders Vision, a sustainability-focused investment platform that has deployed more than $3 billion since its 2021 launch.

2. Vlad Tenev

Age: 38 | Net worth: $5.8 billion | Source of wealth: Stock trading app

Tenev is CEO of Robinhood, the no-fee stock trading app he cofounded with fellow Stanford math grad and Forbes 400 member Baiju Bhatt in 2013. With 26 million active or funded customer accounts, Robinhood is fast encroaching on incumbents like Charles Schwab (37 million) and is six times larger than Merrill Lynch. Crypto now makes up more than a third of transaction-based revenue, while new products ranging from credit cards to IRAs are turning Robinhood into what Brett Knob­lauch, managing director at Cantor Fitzgerald, calls a “mousetrap to trade anything.”

1. Edwin Chen

Age: 37 | Net worth: $18 billion | Source of wealth: Artificial intelligence

Chen studied math, computer science and linguistics at MIT before doing stints in machine learning across the tech trifecta of Google, Facebook and Twitter. Frustrated by what he saw as the lack of quality training data for AI, he launched Surge AI in 2020 to fix the problem. Bootstrapped from day one, Chen says he scaled the company without a dollar of external funding past $1 billion in annual revenue in just five years. Forbes estimates that the company is now worth $24 billion, making Chen’s estimated 75% ownership stake worth $18 billion.