Type	Name	Date
Underwriting agreement	Equity Underwriting Agreement, by and among Merrimack Pharmaceuticals, Inc. and J.P. Morgan Securities LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as representatives of the several Underwriters	07/12/2013

Type	Name	Date
Acquisition / asset purchase agreement	Asset Purchase Agreement, between Merrimack Pharmaceuticals, Inc. and Celator Pharmaceuticals, Inc	03/30/2020
Acquisition / asset purchase agreement	Asset Purchase and Sale Agreement, by and between Merrimack Pharmaceuticals, Inc. and Ipsen S.A.	01/09/2017