The successful suitor for Horizon Therapeutics plc has been revealed as Amgen Inc., which will buy the Dublin-based company for $27.8 billion in cash in what is by far the year’s biggest acquisition. The deal brings successful biologics into Amgen’s portfolio that include Tepezza (teprotumumab), a monoclonal antibody targeting insulin-like growth factor 1 for treating thyroid eye disease, Krystexxa (pegloticase), a pegylated uricase enzyme for treating chronic refractory gout, and Uplizna (inebilizumab), a monoclonal antibody targeting insulin-like growth factor 1 for treating thyroid eye disease.