• Deal to purchase NPS Pharmaceuticals will strengthen position in field of medicines for rare diseases.

    A Shire Plc logo sits on a wall outside the company's offices at the Citywest Business Campus in Dublin, Ireland, on Wednesday, Oct. 15, 2014.
    LAST UPDATE : Jan 12, 2015, 1:07 AM EST
  • A general view of buildings and signage at the Macclesfield Campus of pharmaceutical company AstraZenica on May 7, 2014 in Macclesfield, United Kingdom.

    AstraZeneca rejected a final offer from Pfizer earlier this month, saying the proposal undervalued the company.

    LAST UPDATE : May 27, 2014, 1:54 AM EDT
  • he sign for the UK commercial headquarters of pharmaceutical firm Pfizer at Walton Oaks, which has over 900 employees on the 320-acre site, on May 7, 2014 near Leatherhead, England.

    The U.S. drugmaker pressed the scientific case for its controversial plan to acquire AstraZeneca.

    LAST UPDATE : May 12, 2014, 7:17 AM EDT