Achillion to Present at Two Upcoming Investor Conferences

Achillion Pharmaceuticals, Inc.

(Nasdaq:ACHN) announced today that Milind Deshpande, Ph.D., President and Chief Executive Officer of Achillion, will present a corporate overview at two upcoming investor conferences:

• Baird 2016 Healthcare Conference on Wednesday, September 7, 2016 at 2:00 p.m. ET at the New York Palace in New York City, NY; and

• The LEERINK Partners Rare Disease & Immuno-Oncology Roundtable on Wednesday, September 28, 2016 at 4:10 p.m. ET at the New York Palace in New York City, NY.

The live audio and subsequent archived webcasts of the Company's presentations will be accessible from the Company's investor relations website, http://ir.achillion.com. The audio recording will be archived for 30 days following the live presentation. Please connect to Achillion's website several minutes prior to the start of the presentation to ensure adequate time for any software downloads that may be necessary.

About Achillion Pharmaceuticals

Achillion Pharmaceuticals, Inc. (NASDAQ:ACHN) is a science-driven, patient-focused company seeking to leverage its strengths across the continuum from discovery to commercialization in its goal of providing better treatments for people with serious diseases. The company employs a highly-disciplined discovery and development approach that has allowed it to pursue best-in-class oral antiviral therapy for chronic hepatitis C (HCV) and build a platform of potent and specific complement inhibitors. Achillion is rapidly advancing its efforts to become a fully-integrated pharmaceutical company with a goal of bringing life-saving medicines to patients with rare diseases. More information is available at http://www.achillion.com.

Investors:
Glenn Schulman
Achillion Pharmaceuticals, Inc.
Tel. [phone]
[e-mail]

Media:
Liz Power
Achillion Pharmaceuticals, Inc.
Tel: [phone]
[e-mail]