Business winners and losers 2013

Updated 1:12 PM ET, Fri December 20, 2013
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WINNER: After Facebook's botched float in 2012, Twitter co-founder Jack Dorsey saw his company's stock rise 73% in the first day of trading after the micro-blogging site launched an Initial Public Offering [IPO] in November. Dorsey, worth $1.3 billion according to Forbes, now heads up mobile payment start-up Square. Getty Images
LOSER: Embattled JPMorgan chief Jamie Dimon will be glad to see the back of 2013 after the largest bank in the U.S. agreed to pay $13 billion to the Justice Department to end a probe into its mortgage sales. Getty Images
WINNER: Facebook Chief Operating Officer Sheryl Sandberg -- considered one of the most powerful women in business -- published her first book called 'Lean In: Women, Work and the Will to Lead.' The book sparked a movement encouraging women to pursue their ambitions and confront challenges in the workplace. Stephen Lam/Getty Images/file
WINNER: Dell founder Michael Dell won a protracted bidding war with venture capitalist Carl Icahn to complete a $25 billion deal to take the computer manufacturer private. Getty Images
LOSER: Speaker of the U.S. House of Representatives John Boehner is facing heavy scrutiny from lawmakers following a government shutdown in October, the first in 17 years, and a fiscal cliff that twice threatened to derail the U.S. economy. Getty Images
WINNER: Microsoft CEO Steve Ballmer is one of this year's winners after the U.S. software giant took over troubled mobile phone maker Nokia in a $7.2 billion deal. The acquisition marks a coup for Ballmer, who is due to step down next year. Getty Images
LOSER: In 2012, Brazillian tycoon Eike Batista claimed he would soon be the world's richest man but in the fourth-quarter of 2013, Batista filed for bankruptcy protection for two of his companies as investors lost confidence in his business empire. AFP/Getty Images
WINNER: In October, President Barack Obama nominated Janet Yellen to become the next Chair of the Federal Reserve. With a wealth of experience and highly-respected in financial circles, Yellen will take charge in February 2014. She will be the first woman to hold the post. AFP/Getty Images
LOSER: A year to forget for former Blackberry CEO Thorsten Heins, who stepped down after only 22 months at the helm of the troubled Canadian phone maker. Getty Images
WINNER: Amazon CEO Jeff Bezos pulled off one of the takeovers of the year when he announced a deal to buy the flagship Washington Post newspaper for $250 million. The deal gives the Amazon boss control over one of the most influential news brands in the U.S. AFP/Getty Images
WINNER: 17 year-old Briton Nick D'Aloisio sold his mobile news reader app Summly to Internet giant Yahoo! The London teenager, who invented the app, became one of the world's youngest self-made millionaires. Yahoo did not disclose the terms of the deal with D'Aloisio but reports suggest in the region of $30 million. CARL COURT/AFP/Getty Images
WINNER: It's been a good year for Zara boss Amancio Ortega. Worth an estimated $57 billion, according to Forbes, Ortega shot to third in the world's rich list overtaking U.S. investor Warren Buffet and LVMH boss Bernard Arnault. Getty Images