Alex Denner (Mark Neuling/CNBC/NBCU Photo Bank via Getty Images)

Alex Den­ner is out at Bio­gen as new CEO Viehbach­er crafts a fresh board with Su­san Langer, Car­o­line Dor­sa

Bio­gen’s big top-lev­el shake­up con­tin­ued Mon­day evening with news that Alex Den­ner — first elect­ed to the board back in 2009 when he spear­head­ed Carl Ic­ahn’s bid to en­gi­neer a tu­mul­tuous turn­around — is fol­low­ing long­time chair­man Ste­lios Pa­padopou­los on the way out the ex­it.

And he’s not go­ing alone. Richard Mul­li­gan, the fa­mous Har­vard pro­fes­sor who joined Den­ner on the board dur­ing the re­volt, is al­so out the ex­it door, along with William Jones — who chaired the com­pen­sa­tion and man­age­ment com­mit­tee.

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