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| Sarissa Capital Management founder Alex Denner |
Alex Denner doesn't join a company's board without raising some eyebrows. He has a history of shaking things up, and now he's taken a seat with the board of directors at Ariad ($ARIA)--a position he demanded back in October when the company's only approved drug, Iclusig, ran into major safety concerns. Formerly healthcare head of notorious proxy rebel Carl Icahn's firm, Denner struck out on his own in 2011 to found Sarissa Capital, which is Ariad's second-largest shareholder. Story | More