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Microsoft-co founder, Paul Allen, has won the title of the world's wealthiest bachelor, with an estimated personal fortune of $15.3 billion, according to a ranking by Wealth-X, a global wealth intelligence provider.
Sixty-year-old Allen, who is a business tycoon, investor and philanthropist, owns two sports teams—the Seattle Seahawks, an American football team and the Portland Trail Blazers, a basketball team. He has never been married and resides on Seattle's Mercer Island.
In November, he reportedly snapped up an eight-bedroom mansion in the Silicon Valley town of Atherton for $27 million, joining other billionaire residents in the neighborhood, including Google chairman Eric Schmidt, Hewlett-Packard Chief Meg Whitman and brokerage magnate Charles Schwab.
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Fashion magnate Giorgio Armani was ranked in second place, with personal net wealth of nearly $11 billion. The 79-year-old's business empire includes a high-fashion clothing line, watches and hotels—including The Armani Hotel at the Burj Khalifa in Dubai, in the world's tallest building.
"Against the backdrop of a proliferation of matchmaking TV shows and online services, meeting the right person is harder than ever. Add to that the compounding difficulty of super wealth and navigating the right soul mate and discerning right intentions becomes even more challenging," said David S. Friedman, president at Wealth-X.
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Mikhail Prokhorov, 48-year-old Russian industrialist, politician, and owner of the Brooklyn Nets basketball team came in third place, with a net worth of $9.3 billion
Meanwhile, Xavier Niel, 46, known as France's "Internet king" for creating WorldNet—the country's first Internet service provider—in 1993, claimed fourth place, with an estimated personal fortune of $8 billion.
Youngest billionaire bachelors
While, bachelors above the age of 60 comprised almost half of the top-10 ranking, two eligible billionaire singles in their 30s made the list.
Texas-based Scott Duncan, 31, one of the four children of Dan Duncan formerly the richest man in Houston who died in 2010—ranked seventh, with a personal fortune of $5.3 billion. Duncan is heir to the family fortune built by his father's energy-pipeline business.
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And, in ninth place is Colombian-American Alejandro Santo Domingo Davila, 36. He is the eldest son from the second marriage of Julio Mario Santo Domingo Pumarejo—one of Latin America's richest and most influential men—and has an estimated net worth of $3.9 billion.
The Harvard-educated billionaire serves on the boards of many of the companies controlled by the Santo Domingo Group—one of Colombia's biggest conglomerates that owns more than 100 businesses.
—By CNBC's Ansuya Harjani; Follow her on Twitter: