Type	Name	Date
Indenture	Second Supplemental Indenture, by and between Repligen Corporation and Wilmington Trust, National Association, as trustee	03/08/2022
Indenture	Second Supplemental Indenture, by and between Repligen Corporation and Wilmington Trust, National Association, as trustee	03/08/2022
Underwriting agreement	Underwriting Agreement, among Repligen Corporation, J.P. Morgan Securities LLC and Stifel, Nicolaus & Company, Incorporated, as representatives of the underwriters named therein	12/08/2020
Indenture	First Supplemental Indenture, by and between Repligen Corporation and Wilmington Trust, National Association	07/22/2019
Underwriting agreement	Underwriting Agreement, among Repligen Corporation, J.P. Morgan Securities LLC and Stephens Inc., as representatives of the underwriters named therein	05/01/2019
Underwriting agreement	Underwriting Agreement, among Repligen Corporation, J.P. Morgan Securities LLC and Stephens Inc., as representatives of the underwriters named therein	06/29/2017
Indenture	First Supplemental Indenture, by and between Repligen Corporation and Wilmington Trust, National Association	05/24/2016