Achillion Names Dr. Joel Barrish as Chief Scientific Officer

Achillion Pharmaceuticals, Inc.

today announced that Joel Barrish, Ph.D., has been named the Company's Chief Scientific Officer (CSO) and Executive Vice President, effective January 4, 2016. "It is with great excitement that we welcome Joel to Achillion as CSO," commented Milind Deshpande, Ph.D., President and Chief Executive Officer of Achillion. "Joel is a highly accomplished drug hunter who has co-invented and developed multiple clinical compounds, including the highly successful marketed therapeutic Sprycel for which he received The Thomas Alva Edison Award. Most recently, Joel served as the Vice President and Head of Discovery Chemistry for all therapeutic areas, including Immunology, at Bristol-Myers Squibb. We look forward to him continuing his work to address the needs of patients by stewarding Achillion's expanding portfolio of complement factor D inhibitors including ACH-4471 which is poised to enter clinical development." Dr. Barrish commented, "Achillion is an exciting and innovative company whose discovery and development achievements have impressed me for many years. I am delighted to join an exceptional team and share in this unique opportunity to advance Achillion's Complement inhibitor platform. I believe that ACH-4471 and the ongoing