Baxalta Inc. has received an unsolicited proposal from Dublin-based Shire plc to acquire all outstanding common shares of Baxalta in an all-stock transaction valued at $30.6 billion.   Baxalta noted that it received this same proposal privately on July 10, 2015. Baxalta’s board of directors, in consultation with its financial and legal advisors, reviewed the proposal and unanimously determined that it is not in the best interests of Baxalta or its shareholders.   “The Board today reaffirmed ...