Type	Name	Date
Registration rights agreement	REGISTRATION RIGHTS AGREEMENT	05/16/2023
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	05/16/2023
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	07/01/2022
Registration rights agreement	REGISTRATION RIGHTS AGREEMENT	07/01/2022
Registration rights agreement	REGISTRATION RIGHTS AGREEMENT	03/03/2022
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	03/03/2022
Securities purchase agreement	PURCHASE AGREEMENT	01/14/2022
Registration rights agreement	REGISTRATION RIGHTS AGREEMENT	01/14/2022
Registration rights agreement	REGISTRATION RIGHTS AGREEMENT	11/05/2021
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	11/05/2021
Registration rights agreement	REGISTRATION RIGHTS AGREEMENT	03/19/2021
Securities purchase agreement	SECURITIES PURCHASE AGREEMENT	03/19/2021

Type	Name	Date
By-Laws	Amended and Restated By-Laws of Arsanis, Inc	11/20/2017

Type	Name	Date
Merger agreement	Agreement and Plan of Merger, by and among Arsanis, Inc., Artemis AC Corp. and X4 Pharmaceuticals, Inc	11/27/2018

Type	Name	Date
Lease agreement	Lease, by and between X4 Therapeutics, Inc. (formerly X4 Pharmaceuticals, Inc.) and Brickman 955 Massachusetts LLC	03/13/2019
Lease agreement	Lease, by and between X4 Therapeutics, Inc. (formerly X4 Pharmaceuticals, Inc.) and Brickman 955 Massachusetts LLC	03/13/2019
Lease agreement	Indenture of Lease, by and between the Company and BP Bay Colony LLC	06/12/2018