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Activist investors return

Carl Icahn (L), Bill Ackman (R)

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Return of the activist investor

Activist investors are back. A whole new generation of cage-rattlers are taking on some of the world's biggest corporations – and some of the original activists of the 1980s have returned to the fray with a bang. As Carl Icahn buys big in Apple and Dell, Dan Loeb counts his Yahoo profits, and they both tussle with Bill Ackman over Herbalife, here are ten of the most successful activist investors and their most famously profitable deals.

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