Most of us grow up believing that a college or university education is key to a successful career and comfortable life. But with around a quarter of billionaires having dropped out of school, that belief seems to be something of a myth.

Read on to meet the people who've made huge fortunes without a degree and, in some instances, changed the world.

All dollar values in US dollars. Net worth estimates courtesy of Forbes.

Having co-founded digital publishing companies Blogger, Twitter, and Medium, Evan Williams is a self-made billionaire. He grew up working on his family's soybean and corn farm before attending the University of Nebraska.

After dropping out, he learned to write computer code and, with two friends, created the blogging platform Blogger. Eventually selling the platform to Google, Williams spent two years working for the company before co-founding Twitter (now X). He’s now worth $1.9 billion (£1.5bn). 

Ted Turner dropped out of Brown University to work for his father's company Turner Advertising, eventually taking control of the business.

The company was rebranded as Turner Broadcasting and grew into a billion-dollar enterprise. Today, Turner has a net worth of $2.5 billion (£2bn) and is a dedicated philanthropist committed to restoring America's natural environments. 

Worth an estimated $2.6 billion (£2bn) today, Richard Branson founded the Virgin brand and its many companies including the famous Virgin Atlantic Airways.

He originally wanted to become a journalist or an editor but dropped out of school at 16 to start his first successful business, Student magazine. By the age of 24 he'd snapped up his own Caribbean island, and he was knighted in 1999.

Media mogul Oprah Winfrey has a net worth of $3 billion (£2.3bn) today, but the road to her fortune was far from conventional. Born into poverty, Winfrey started studying at Tennessee State University but dropped out at 19 after landing her first radio job. However, unlike the other names on this list, she notably decided to return to TSU in 1987 when the university invited her to speak at its commencement.

Despite having her own TV show, an Oscar nomination, and her own company, Winfrey opted to go back and finish her coursework. After turning in her final paper, she was awarded the degree she had originally started studying for – and only then did she agree to give that commencement speech.

Travis Kalanick dropped out of college to focus on his tech start-ups Scour and RedSwoosh, but is best known for co-founding Uber in 2009.

Kalanick stepped down as CEO of Uber in 2017 and left the board in 2019, selling his 4% stake for billions. He's now the CEO of CloudKitchens, a global virtual restaurant company, and boasts a net worth in the region of $3.6 billion (£2.8bn). 

After dropping out of college, BarryDiller eventually went on to establish the internet and media giant IAC in 1995. Prior to that, he worked at ABC, Paramount, and Fox where he launched hit TV shows including Cheers and The Simpsons.

He's also the chairman of Expedia and is married to designer Diane Von Furstenberg. He's believed to own a large chunk of her fashion business. Today, he's worth an estimated $4.1 billion (£3.2bn).

A college degree wasn’t necessary for this founding member of Twitter and founder and chief executive officer of payments company Square.

Having attended Missouri University of Science and Technology before transferring to NYU, Jack Dorsey dropped out to develop Twitter. He left the company in 2021 and is currently worth around $4.2 billion (£3.2bn). 

Gabe Newell attended Harvard but eventually dropped out. He co-founded Valve Corporation in 1998 and is now worth a healthy $4.3 billion (£3.3bn).

He's currently the CEO of the company, which plays a big role in PC game sales through its Steam digital game store and has been labelled the iTunes of video games.

Steven Spielberg was denied entry into college on three occasions due to his mediocre grades. When he eventually did gain entry, he dropped out to focus on making a short film, which earned him a job with Universal.

Spielberg co-founded DreamWorks Studios in 1994 along with Jeffrey Katzenberg and fellow dropout and billionaire David Geffen. His net worth today is a staggering $4.8 billion (£3.7bn).

The controversial US investor dropped out of medical school to join the army and is now worth $5.5 billion (£4.3bn) after founding his own firm in 1968.

Icahn became infamous through a series of takeovers and attempted takeovers of some of the biggest companies in America, including Texaco, TWA, and American Airlines. 

Born in the Bronx to Russian Jewish immigrants, Ralph Lauren worked part-time in the garment industry as a teenager before establishing the fashion brand that bears his name. His big break arrived when Neiman Marcus ordered 1,200 of his distinctively designed ties.

The college dropout now has a net worth of around $9.2 billion (£7.1bn). Lauren stepped down as chief executive officer in 2015 but remains executive chairman and chief creative officer of the company he founded.

A medical school dropout, Giorgio Armani became a billionaire after founding the fashion brand that bears his name. He served in the military before getting a job as a buyer and window dresser for a department store in Milan.

Armani launched his own line in the mid-1970s and now the brand sells accessories, perfumes, makeup, jeans, sportswear and couture. Today, he has an astonishing net worth of $12 billion (£9.3bn). 

The sudden death of his father led Azim Premji to drop out of Stanford at the age of 21 to run his family's cooking oil business. He expanded into software and founded Wipro, an IT outsourcing and services company.

However, tired of being called a college dropout, at the age of 50 he returned to Stanford to complete his degree. Dubbed India’s richest tech tycoon, Premji is worth $12.1 billion (£9.4bn) today. 

WhatsApp co-founder Jan Koum sold the world’s biggest mobile messaging service to Facebook in 2014 for about $22 billion in cash and stock, the equivalent of $29 billion (£22.4bn) in 2024 money.

The San Jose State University dropout worked for Yahoo for nine years until 2007. Between February and May 2016, Koum donated more than six million Facebook shares to an undisclosed recipient but is still worth a sizable $16.1 billion (£12.4bn) today.

The roommate who helped launch Facebook with Mark Zuckerberg from their Harvard dorm is now worth a staggering $17.9 billion (£13.8bn).

After dropping out of university and leaving Facebook, Dustin Moskovitz co-founded workflow software company Asana. The majority of his net worth today stems from his 2% stake in Facebook. 

A rags-to-riches story, Li Ka-shing fled to Hong Kong with his family in 1940 after the Japanese invaded China. He left school at 15 to work in a plastics factory after his father died of tuberculosis.

Ka-shing went on to open his own factory and branched out into real estate before buying Hutchison Whampoa, a conglomerate with interests in container ports around the world. Today, his empire spans from retail to tech and he boasts an estimated net worth of $36.7 billion (£28.4bn).

Indian business tycoon Gautam Adani quit Gujarat University in his second year and moved to Mumbai. He started out working in the diamond business and eventually set up his own company.

As chairman of Adani Group, he oversees a wide range of interests including coal trading, coal mining, oil and gas exploration, ports, logistics, power generation, and gas distribution. He's now worth an astonishing $83.4 billion (£64.3bn).

Michael Dell started his computer company in his University of Texas dorm room and later dropped out of college to focus all his efforts on the business.

Dell Computers Inc is now one of the biggest PC manufacturers in the world and has earned Dell an estimated net worth of $108.4 billion (£83.6bn). 

Amancio Ortega left school at 14 to run errands for shirt stores. He went on to establish the fashion empire Inditex, which includes Zara, Massimo Dutti, and Pull&Bear among its brands.

Ortega stepped down as Inditex chairman in 2011 but still rakes in millions annually. He's the richest man in Spain with a net worth of $114.7 billion (£88.5bn). 

The co-founder of the world’s largest software company, Bill Gates left Harvard University to focus on building his Microsoft empire.

Today, he's worth a mammoth $135 billion (£104bn) and previously held the title of world’s richest person for 13 consecutive years. A renowned philanthropist, Gates and former wife Melinda are using their fortunes to fight poverty and disease in countries around the world.

After dropping out of college twice and being told by his adopted father that he wouldn’t amount to anything, Larry Ellison built the world’s second-largest software company and became a multibillionaire in the process.

Ellison founded Oracle in 1977 and is its chairman and chief technology officer to this day. He's now worth $176.6 billion (£136bn). 

Mark Zuckerberg, the Facebook (now Meta) co-founder, chairman, and CEO famously left Harvard University after his sophomore year to concentrate on the social networking site he started from his dorm room.

He's now worth a truly astounding $179.7 billion (£139bn). He owns around 13% of the company's stock, but in 2015, he and his wife Priscilla Chan, pledged to give away 99% of their Meta stake over their lifetimes.

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