John Maraganore (Photo by Ryan Emberley/Getty Images for Klick Inc.)

In a sur­prise de­par­ture, Al­ny­lam's found­ing CEO John Maraganore is leav­ing the com­pa­ny — shares crater

John Maraganore, the de­ter­mined Al­ny­lam CEO who led the com­pa­ny through thick and thin to help birth the RNAi rev­o­lu­tion, is on his way out of the ex­ec­u­tive suite.

In a sur­prise an­nounce­ment Thurs­day morn­ing, Maraganore said that he will hand the reins to cur­rent pres­i­dent Yvonne Green­street at the end of the year, mark­ing the end of a 20-year run as the found­ing CEO of the sto­ried com­pa­ny. He will stay on through the first quar­ter as a con­sul­tant and will take a seat on Al­ny­lam’s sci­en­tif­ic ad­vi­so­ry board.

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