--- title: Forbes 400 Richest Americans 2015 description: 2015 Forbes ranking of 400 richest Americans like Mark Zuckerberg, Bill Gates, Warren Buffett, Jeff Bezos, Charles Koch, David Koch canonical: https://time.com/4053748/forbes-400-richest-americans/ author: Olivia B. Waxman article:opinion: false article:content_tier: free article:published_time: 2015-09-29T14:51:08.000Z article:modified_time: 2026-08-04T07:43:50.241Z og:title: These Are the 400 Richest Americans og:description: 2015 Forbes ranking of 400 richest Americans like Mark Zuckerberg, Bill Gates, Warren Buffett, Jeff Bezos, Charles Koch, David Koch og:url: https://time.com/4053748/forbes-400-richest-americans/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt7bc49d8c8eea714c/698778933c16392a22451052/money-dollar-bills-3.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 2560 og:image:height: 1440 og:image:alt: TIME.com stock photos Money Dollar Bills og:type: article twitter:card: summary_large_image twitter:title: These Are the 400 Richest Americans twitter:description: 2015 Forbes ranking of 400 richest Americans like Mark Zuckerberg, Bill Gates, Warren Buffett, Jeff Bezos, Charles Koch, David Koch twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt7bc49d8c8eea714c/698778933c16392a22451052/money-dollar-bills-3.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # These Are the 400 Richest Americans ## Video: Melinda Gates on Women's Biggest Problem in the Workplace [Watch (HLS stream): Melinda Gates on Women's Biggest Problem in the Workplace](https://cdn.jwplayer.com/manifests/umfaJAjz.m3u8) (1:00)  _Published 2014-11-19. Melinda Gates talks to TIME's Belinda Luscombe about the biggest problem for women in the workplace_  by [Olivia B. Waxman](https://time.com/author/olivia-b-waxman/)  ## Olivia B. Waxman Staff Writer Sep 29, 2015 2:51 PM UTC  Elizabeth Renstrom for TIME  by [Olivia B. Waxman](https://time.com/author/olivia-b-waxman/)  ## Olivia B. Waxman Staff Writer Sep 29, 2015 2:51 PM UTC Forbes has released its annual ranking of the [400 richest people in America](http://www.forbes.com/forbes-400). The financial news outlet announced that the combined wealth of “The Forbes 400” is $2.34 trillion, up from $2.29 trillion in 2014 and the highest ever. The average net worth of a Forbes 400 member is an astounding $5.8 billion, the highest to date, up from $5.7 billion last year. Additionally, the threshold for a spot on the list also reached a new peak at “$1.7 billion, up from $1.55 billion a year ago.” The youngest person on the Forbes 400 is 25-year-old Snapchat founder Evan Spiegel, who is ranked 327 with a net-worth of $2.1 billion, while the youngest woman is 31-year-old Theranos CEO Elizabeth Holmes, who is ranked 121 with a net-worth of $4.5 billion. At 100 years old, David Rockefeller, Sr., ranked 211 with a net-worth of $3 billion, is the oldest ranked billionaire. Here are the top 10:  ### See The 7 Most Important Tech CEOs You Wouldn't Recognize  Jack Ma, founder of Chinese Internet giant Alibaba, stepped down as that firm's CEO in 2013\. But he's still the company's most public face, and after Alibaba's September IPO, China's single richest man. Scott Eells—Bloomberg/Getty Images  Larry Ellison stunned the tech world in September by announcing he's stepping down as CEO of Oracle, the enterprise software company he co-founded in 1977\. Since Oracle doesn't sell products to the public like Apple or Microsoft, Ellison's a little less-known outside Silicon Valley: But he's a hugely important figure, having heavily influenced Steve Jobs and a host of other tech leaders. Tomohiro Ohsumi—Bloomberg/Getty Images  Tony Hsieh, CEO of shoe-tailer Zappos.com, is a controversial figure in the world of tech chief officers. He's pouring money into Zappos' corporate home of Las Vegas, Nevada, which is welcome by some locals but spurned by others. Still, Zappos is known for being a very fun and very different place to work, thanks in part to Hsieh setting those qualities up as priorities for the company. Noah Berger—Bloomberg/Getty Images  Satya Nadella just took over the reins at Microsoft earlier this year from now-Clippers owner Steve Ballmer, but he's already making his presence known through sizable layoffs and simultaneous acquisitions. Nadella's Microsoft has let go of nearly 15,000 employees this year — a chunk of whom were made redundant when Microsoft closed an approximately $7.2 billion deal for Nokia's device wing. Also on Microsoft's tab? $2.5 billion for the Swedish gaming company behind top-hit Minecraft. Microsoft/Corbis  Linkedin CEO Jeff Weiner, formerly a longtime Yahoo employee, has grown the "Facebook For Professionals'" user base and revenue exponentially since coming becoming CEO in 2009\. He's got quite the fan base, too: His workers, 100% of whom support him as CEO, according to Glassdoor. Robert Galbrath—Reuters/Corbis  John Donahoe has been president and CEO of eBay since 2008\. He's now guiding the company in a time of deep uncertainty: In early 2014, eBay settled a nasty public feud with activist investor Carl Icahn, who wants eBay to spin off payment service PayPal as an independent business — and Icahn isn't the only one who thinks that's a good idea. Paul Morris—Bloomberg/Getty Images  Don Mattrick became CEO of Zynga, the social gaming company that brought us FarmVille, in 2013, coming over from Microsoft. He's been tasked with leading Zynga through a tumultuous period — the now publicly-traded company hasn't been able to replicate its FarmVille success, leaving many to wonder about the company's future. 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