Shire PLC (ADR) (NASDAQ:SHPG) plunged -30.32% today after AbbVie announced that it is reconsidering its $55 billion tender offer for the company. The stakes are high on this one for billionaire hedge fund manager John Paulson, who as of Q2 2014 holds 3.37 million SHPG shares. Farallon Capital has a position in the biotech company as well. Despite today's dip, Shire is up +21.67% YTD.