Celgene Corporation Elects Mr. Michael W. Bonney to Its Board of Directors

April 15, 2015

Mr. Bonney served as Chief Executive Officer and a member of the Board of Directors of Cubist Pharmaceuticals, Inc. from June 2003 until his retirement on December 31, 2014.

PRESS RELEASE

SUMMIT, N.J.--(BUSINESS WIRE)-- Celgene Corporation (NASDAQ:CELG) today announced the election of Michael W. Bonney to its Board of Directors. Mr. Bonney served as Chief Executive Officer and a member of the Board of Directors of Cubist Pharmaceuticals, Inc. from June 2003 until his retirement on December 31, 2014.

In addition to his tenure as CEO of Cubist, Mr. Bonney's vast healthcare experience includes serving as President and Chief Operating Officer of Cubist from January 2002 to June 2003; holding various positions of increasing responsibility at Biogen, Inc., from 1995 - 2001; and serving in positions of increasing responsibility in sales, marketing and strategic planning at Zeneca Pharmaceuticals over an eleven year period.

Mr. Bonney currently serves as a director of Alnylam Pharmaceuticals, Inc. He is also a trustee of the Tekla complex of life sciences and healthcare dedicated funds. Mr. Bonney was a Director of NPS Pharmaceuticals, Inc. from 2005 until its sale to Shire plc in February 2015. Mr. Bonney received a B.A. in Economics from Bates College and currently chairs the board of trustees of Bates College.

"Mike's extensive leadership and operational experience will help guide us as we execute our key strategic imperatives," said Bob Hugin, Celgene Chairman and Chief Executive Officer. "Celgene will benefit greatly from Mike's knowledge and insights on the increasingly dynamic global healthcare environment."