The 10 Youngest Richest, From Sergey Brin to Mark Zuckerberg (Photos)

The Daily Beast finds the richest—and youngest—people in America.

Mark Zuckerberg has a lot of responsibility on his shoulders for a 27-year-old. But there’s at least one thing he hasn’t had to worry about for years: the state of his bank account.

With market-capitalization estimates as high as an absurd $75 billion to $100 billion, Facebook’s initial public offering likely added several billion dollars to Zuckerberg’s net worth (on paper, anyway). Zuckerberg is young, and he is very, very rich—but he’s not the only one.

We compiled this ranking of the youngest richest people in America using data from the Securities and Exchange Commission and the most recent Forbes magazine estimates.

-Clark Merrefield

George Mattei

Milane Frantz

Age: 42
Net worth: $3.4 billion
Notable company:
Enterprise Products
Current position:
Board director, Hermann Park Conservancy

Milane Frantz is the youngest billionaire over 40, but she’s the oldest billionaire on our list. Her father, Dan Duncan, built Enterprise Products—a Houston-based oil-and-gas pipeline company—from the ground up. Frantz inherited a sizable fortune when Duncan died in 2010.

George Mattei

Daniel Ziff

Age: 39
Net worth: $4.2 billion
Notable company:
Ziff Brothers Investments
Current position:
Hedge-fund manager, Ziff Brothers

Daniel Ziff’s father made his fortune in the publishing business with the magazine company Ziff-Davis, which was founded by Daniel’s grandfather. When Daniel and his brothers inherited more than $1 billion in the mid-1990s, they reinvested it into their own hedge fund, Ziff Brothers Investments, which focuses on capital for companies in Southeast Asia.

Bloomberg / Getty Images

Larry Page

Age: 38
Net worth: $16.7 billion
Notable company:
Google
Current position:
CEO, Google

One of the youngest and richest people in America when Google went public in 2004, Page has seen his net worth grow fourfold since then.

Bloomberg / Getty Images

Sergey Brin

Age: 38
Net worth: $16.7 billion
Notable company:
Google
Current position:
Special project director, Google

Along with Larry Page, Sergey Brin needs little introduction. With a revolutionary algorithm that changed the way the information on the Web is disseminated, Brin went from dorm-room geek to the executive-suite in a matter of years. Like Page, Brin has seen his net worth quadruple since Google’s IPO.

Melissa Golden, Bloomberg / Getty Images

John Arnold

Age: 37
Net worth: $3.5 billion
Notable company:
Centaurus Advisors
Current position:
Founder and hedge-fund manager, Centaurus Advisors

Arnold started at Enron but came out of that company’s implosion unscathed to found Centaurus Advisors in 2002, at age 28. Arnold made his billions thanks to smart bets and an uncanny understanding of energy markets—no wonder that his fund routinely sees returns of 80 percent per year.

Eric Piermong, AFP / Getty Images

Sean Parker

Age: 31
Net worth:
$2.1 billion
Notable companies:
Napster; Facebook
Current position: Board director, Spotify

Finally, we’ve reached the Facebook stratosphere. Sean Parker was already considered a wunderkind for founding Napster at age 19, when just a few years later he helped create the vision that would guide Facebook to social-network supremacy. Parker isn’t the richest young person on this list, but at age 31 he could surpass legends like Brin and Page in just a few years. That is, if he avoids the gambler’s persona portrayed by Justin Timberlake in The Social Network.

Jason Kempin / Getty Images

Eduardo Saverin

Age: 29
Net worth: $2 billion
Notable company:
Facebook
Current position:
Investor

Facebook cofounder Eduardo Saverin may have been pushed out of Facebook’s day-to-day affairs by Zuckerberg, but he certainly cashed in. By retaining a 5 percent stake in the social-networking site, thanks to litigation against his former friend’s company, Saverin ensured he’d never have to work another day in his life.

George Mattei

Scott Duncan

Age: 28
Net worth: $3.4 billion
Notable company:
Enterprise Products
Current position:
N/A

Milane Frantz’s little brother is the only billionaire under 30 not connected in some way to Facebook. Like Milane, Scott Duncan became one of America’s richest young people when he inherited his fortune, after his father—owner of oil-and-gas powerhouse Enterprise Products—passed away two years ago.

Kimberly White / Getty Images

Dustin Moskovitz

Age: 27
Net worth:
$5.7 billion–$7.6 billion
Notable company:
Facebook
Current position: Founder, Asana

Now we’re talking rich—filthy, disgustingly rich for an individual of any age. Another Facebook cofounder, we estimate that Dustin Moskovitz is worth somewhere in the range of $5.7 billion to $7.6 billion, based on his 7.6 percent Facebook ownership stake and a market capitalization between $75 billion and $100 billion. He’s eight days younger than Mark Zuckerberg, but we’re giving the last slide to the young man who sits atop Facebook Mountain—because Zuckerberg is worth so, so much more.

Kelvin Ma, Bloomberg / Getty Images

Mark Zuckerberg

Age: 27
Net worth: $21.3 billion - $28.4 billion
Notable company:
Facebook
Current position:
CEO, Facebook

Some 27-year-olds are just getting their foot in the door at their dream job. Others, like Mark Zuckerberg, are running multibillion-dollar companies. Just like with Dustin Moskovitz, we estimated Zuckerberg’s net worth by shares held and market capitalization. According to recently filed documents with the SEC, Zuckerberg holds 28.4 percent of Facebook’s shares—with a market cap somewhere between $75 billion and $100 billion, we estimate Zuckerberg is worth (on paper) in the range of $21.3 billion to $28.4 billion..