[elon musk immigrant billionaires]REUTERS/Callaghan O'Hare * Some of the richest people who currently live in the United States were not born here. * Several billionaires — including Tesla CEO Elon Musk, real-estate developer Jorge Perez, Panda Express founder ANDREW CHERNG, and Chobani CEO Hamdi Ulukaya — first came to the United States for college. * Financier George Soros first immigrated to the UK while fleeing Soviet occupation in his native Hungary, before moving to New York to become a stock trader, Business Insider previously reported. * VISIT BUSINESS INSIDER'S HOMEPAGE FOR MORE STORIES. The United States is home to more billionaires than any other nation, according to research firm Wealth-X — but not all of them were born here. Several billionaires — including Tesla CEO Elon Musk, real-estate developer Jorge Perez, Panda Express founder Andrew Cherng, and Chobani CEO Hamdi Ulukaya — first came to the United States for college. Others immigrated to the United States with their families as children. _READ MORE: 13 billionaires who dropped out of college before making their fortunes_ Keep reading to learn more about some of the most prominent immigrant billionaires in the country. SERGEY BRIN'S FAMILY EMIGRATED FROM THE SOVIET UNION WHEN HE WAS 6. Eric Risberg/Associated Press NET WORTH: $57.5 billion SOURCE OF WEALTH: Alphabet The 46-year-old billionaire founded the search engine now known as Google with Larry Page in a garage in Menlo Park, California, Business Insider previously reported. Brin currently serves as the president of Alphabet, the parent company that owns Google, per Forbes. _READ MORE: Google cofounders Larry Page and Sergey Brin are worth more than $100 billion — see how they spend it, from trapeze lessons to a 600-foot 'air yacht'_ HAMDI ULUKAYA FOUNDED THE YOGURT BRAND CHOBANI AFTER EMIGRATING FROM TURKEY TO ATTEND COLLEGE IN NEW YORK. Thomson Reuters NET WORTH: $2.1 billion SOURCE OF WEALTH: Chobani Ulukaya, 46, received a $3,000 loan from the Small Business Administration in 2007 and used it to buy an old yogurt plant in Norwich, New York. Chobani now sells over $1 billion of yogurt annually and is America's most popular brand of Greek yogurt, Forbes reports. Ulukaya now advocates for companies to get involved in the ongoing refugee crisis, Bloomberg reported in August. Chobani recruits refugees for jobs at its plants and encourages other companies to do the same. _READ MORE__: __The Chobani billionaire who turned a $3,000 loan into a yogurt empire calls himself an 'anti-CEO' and thinks other CEOs should do the same_ FINANCIER GEORGE SOROS FLED SOVIET OCCUPATION IN HIS NATIVE HUNGARY IN 1947. Reuters/Jorge Silva NET WORTH: $8.3 billion SOURCE OF WEALTH: Quantum Fund Soros, 88, attended the London School of Economics before moving to New York and getting a job as a stock trader, Business Insider previously reported. Soros went on to found what would later become the world's largest hedge fund, Quantum Fund. _READ MORE: What George Soros' life is really like: How the former hedge-fund manager built his $8.3 billion fortune, purchased a sprawling network of New York homes, and became the topic of international conspiracy theories_ SEE THE REST OF THE STORY AT BUSINESS INSIDER SEE ALSO: * Billionaire Marc Benioff is asking for higher taxes on America's wealthiest people — and he's just the latest in the chorus of ultra-wealthy people with the same demand * A real-estate billionaire who was the first in his family to attend college just pledged $100 million to fund scholarships for first-generation students at his alma mater, UVA * The 15 richest people in India, ranked SEE ALSO: LUCK VS. SKILL: THE FOUNDERS BEHIND MAJOR BUSINESSES LIKE BUMBLE, SHOPIFY, AND AWAY EXPLAIN WHAT THEIR SUCCESS BOILS DOWN TO — AND THEY ALL HAVE DIFFERENT TAKES DON'T MISS: FOREVER 21 JUST FILED FOR BANKRUPTCY — AND THE HUSBAND AND WIFE DUO WHO FOUNDED IT HAVE LOST NEARLY $4 BILLION FROM THEIR PERSONAL NET WORTHS SINCE 2015