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Forbes World's Billionaires 2012

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Forbes began the authoritative pursuit of the world’s billionaires 25 years ago. Our first cut yielded 140 names with ten-figure fortunes (24 of whom are still in the ranks). Since then the clubhouse has added a few wings. This year we’ve counted 1,226 billionaires, an ­all-time high. At a record $4.6 trillion, the group’s combined net worth is up 2%. The average worth of a Forbes Billionaire is $3.7 billion.

The big story this year is churn. There were almost as many list members who lost wealth (441) as there were who gained it (460). Only 180 held steady. Innovation, a rebounding Dow and vibrant IPO markets helped mint 128 new names, such as Glencore’s Ivan Glasenberg (No. 125) and Tesla’s Elon Musk (No. 634). Slumping commodities and Asian markets knocked 117 out of the ranks. Another 12 members from the 2011 list passed away, including buyout titan Teddy Forstmann and Apple’s Steve Jobs, whose wife Laurene Powell Jobs takes his spot. In total, there was a net increase of 16 billionaires, up from 1210 in 2011.

There are now billionaires from 58 countries including ones from Peru, Morocco and Georgia. The U.S. is still home to more billionaires than any other nation, with 425, a dozen more than a year ago. Russia and mainland China follow behind. They have 96 and 95, respectively, down from 101 and 115. The BRIC nations, which were such a force of wealth creation a year ago, have 26 fewer ten-figure fortunes, with only Brazil adding to its bounty.

Carlos Slim Helú of Mexico tops the ranks for the third year in a row, but the gap between him and Bill Gates is closing again. His fortune, at $69 billion, is down $5 billion. He was one of 7 in the top 20 whose fortunes slipped, including Warren Buffett and Larry Ellison.

Meanwhile Gates, whose foundation helped wipe out polio in India, added$5 billion to his pile and is now up to $61 billion as Microsoft shares hit a ten-year high. Amancio Ortega, the man behind fast fashion chain Zara, moved into the top 5, despite having stepped down as chairman last year. India’s Lakshmi Mittal, who runs the world’s largest steel company, ArcelorMittal, was the biggest loser. His fortune plummeted by $10.4 billion, knocking him out of the top 10 for the first time since 2004. He is ranked No. 21. That left an opening for Hong Kong’s Li Ka-shing, now ranked no. 9, who reclaims title of richest Asian for the first time since 2004, despite a $500 million drop in his own net worth.

There are lots of ingenious ways to make fortunes, not the least of which is using a popular brand to cater to a world full of consumers. Facebook’s Mark Zuckerberg is worth $17.5 billion, up $4 billion from a year ago; he may be worth far more once Facebook goes public this spring. Notable newcomers with stellar brands include Kevin Plank, founder of sportswear maker Under Armour, and Sara Blakely, with her Spanx line of newfangled girdles. Blakely, 41, is the world’s youngest self-made woman billionaire. Another notable woman in the ranks is Miuccia Prada, who returns to the list after a six-year absence. Two American immigrants to make their debut are the Jacksonville Jaguars’ Shahid Khan, who came from Pakistan when he was 16 and is the first minority immigrant owner of an NFL team, and 5-hour Energy’s Manoj Bhargava, who emigrated as a boy from India.

We hope you get some inspiration from a planet’s worth of entrepreneurs, tycoons and working heirs. We also offer some perspective in our 25th anniversary retrospective, highlighting the ups and downs, but mostly ups, of  the world’s wealthiest through the years.

More than 50 reporters in 16 countries worked on compiling the list this year, valuing individuals' public holdings, private companies, real estate, yachts, art and cash. Net worths were locked in using stock prices and exchange rates from Feb. 14. Click here for more on our methodology.