​Celgene to expand in Cambridge, taking former Amgen space

Celgene Corp. is expanding its presence in Cambridge, leasing about 40,000 square feet of additional space in the Alewife neighborhood that was previously occupied by Amgen.Amgen Inc. (Nasdaq: AMGN) occupied the fifth floor of 200 Cambridge Park Drive between January 2015 and September 2016, when staff there moved to the company’s newly-expanded office in Kendall Square, a spokeswoman for the California drugmaker said. The lease officially expires at the end of this year.Celgene (Nasdaq: C