Type	Name	Date
Underwriting agreement	Underwriting Agreement, by and among Arena Pharmaceuticals and Citigroup Global Markets Inc. and Leerink Partners LLC, as representatives of the several underwriters named therein	03/22/2018
Underwriting agreement	Underwriting Agreement, by and among Arena Pharmaceuticals and Citigroup Global Markets Inc. and Leerink Partners LLC, as representatives of the several underwriters named therein	07/13/2017
Underwriting agreement	Underwriting Agreement, by and among Arena Pharmaceuticals and Citigroup Global Markets Inc. and Leerink Partners LLC, as representatives of the several underwriters named therein	04/18/2017
Underwriting agreement	Underwriting Agreement, by and among Arena, Jefferies LLC and Piper Jaffray & Co., as representatives of the several underwriters named therein	01/23/2015
Securities purchase agreement	Securities Purchase Agreement	08/06/2010

Type	Name	Date
By-Laws	Amended and Restated Bylaws of Arena Pharmaceuticals, Inc	03/11/2022
By-Laws	Amended and Restated Bylaws of Arena	06/16/2020
By-Laws	Amended and Restated Bylaws of Arena	10/09/2014

Type	Name	Date
Employment agreement	Employment agreement, between Arena and Kevin R. Lind	06/16/2016
Equity incentive plans	2013 Long-Term Incentive Plan	05/09/2016
Employment agreement	Executive Employment Agreement, between Arena and Amit D. Munshi	05/09/2016
Severance agreement	Severance Agreement, between Arena and Amit D. Munshi	05/09/2016
Summary of incentive plan	Annual Incentive Plan	12/19/2012
Summary of incentive plan	Annual Incentive Plan	01/26/2012
Summary of incentive plan	Annual Incentive Plan	01/25/2011

Type	Name	Date
Merger agreement	Agreement and Plan of Merger, by and among Arena Pharmaceuticals, Inc., Pfizer Inc. and Antioch Merger Sub, Inc	12/13/2021