William (Bill) Ackman is the founder and CEO of Pershing Square Capital Management, an American hedge fund that holds shares in Wendy’s International and McDonald’s Corporation. As well it has interest in Target Corp., the second largest discount company in US.

Graduated at Harvard College, he holds also an MBA from Harvard Business School. He began his career working for his father in the real estate, and in 1993 he founded Gotham Partners Management Co. This investment company encounters some troubles including legal problems that will lead to its dissolution in 2003.

In 2004, William Ackman comes back on the financial stage. He has created Pershing Square Capital, and he showed a lot of activism buying massive share in the lowest price for resale in two years maximum. A short-term strategy often criticized by the US Medias. His different attacks against FSA, American division of Dexia, and also against MBIA and Ambac, that it forecast the collapse, earned him a strong enmity in financial world.

In 2007, William Ackman took a share up to 5 millions of dollar (3,5%) in Sears Holdings, third group in distribution sector in US, behind Wal-Mart and Home Depot.

Pershing Square Capital Management manages approximately 2.4 billion of dollar of which 40% was invested in shares of McDonald.

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