Amgen announced that it has completed its acquisition of Horizon Therapeutics plc for $116.50 per share in cash, representing a transaction equity value of approximately $27.8 billion.

"Today marks an exciting milestone as we welcome Horizon employees to Amgen and begin working together to serve even more patients around the world suffering from serious illnesses," said Robert A. Bradway, Amgen's chairman and chief executive officer. "We have strong momentum in our core business and the addition of Horizon will further position Amgen as a leader across a broader range of diseases."