Type	Name	Date
Underwriting agreement	Underwriting Agreement, by and among the Company, Leerink Partners LLC and Deutsche Bank Securities Inc., as representatives of the several underwriters named therein	02/12/2015
Underwriting agreement	Underwriting Agreement, by and among the Company, Citigroup Global Markets Inc. and Leerink Swann LLC, as representatives of the several underwriters named therein	02/22/2013

Type	Name	Date
By-Laws	Amended and Restated Bylaws of Achillion Pharmaceuticals, Inc	01/28/2020

Type	Name	Date
Employment agreement	Employment Agreement, by and between Achillion Pharmaceuticals, Inc. and Brian Di Donato	02/11/2019
Employment agreement	Employment Agreement, by and between Achillion Pharmaceuticals, Inc. and Brian Di Donato	02/11/2019
Employment agreement	Employment Agreement, by and between Achillion Pharmaceuticals, Inc. and Paul Firuta	09/10/2018
Employment agreement	Employment Agreement, by and between Achillion Pharmaceuticals, Inc. and Paul Firuta	09/10/2018
Equity incentive plans	2015 Stock Incentive Plan	06/08/2015
Employment agreement	Employment Agreement, between Achillion Pharmaceuticals, Inc. and David Apelian	05/30/2013
Employment agreement	Employment Agreement, between Achillion Pharmaceuticals, Inc. and Milind Deshpande	05/30/2013

Type	Name	Date
Merger agreement	Agreement and Plan of Merger, by and among Achillion Pharmaceuticals, Inc., Alexion Pharmaceuticals, Inc., and Beagle Merger Sub, Inc	10/16/2019

Type	Name	Date
Lease agreement	Lease Agreement, by and between Achillion Pharmaceuticals, Inc. and Sentry KPG III, L.P	12/04/2018
Lease agreement	Amendment to Lease, by and between Achillion Pharmaceuticals, Inc. and Sentry KPG III, L.P	12/04/2018
Lease agreement	Amendment No. 4 to Lease Agreement, by and between Achillion Pharmaceuticals, Inc. and WE George Street, L.L.C	04/08/2016
Lease agreement	Amendment No. 3 to Lease, by and between Achillion Pharmaceuticals, Inc. and WE George Street, L.L.C	08/24/2015