Type	Name	Date
Registration rights agreement	Registration Rights Agreement, by and among Brookline Capital Acquisition Corp., Apexigen, Inc. and Lincoln Park Capital Fund, LLC	03/18/2022
Securities purchase agreement	Purchase Agreement, by and among Brookline Capital Acquisition Corp., Apexigen, Inc. and Lincoln Park Capital Fund, LLC	03/18/2022
Underwriting agreement	Underwriting Agreement, by and among the Company and Brookline Capital Holdings LLC, as representatives of the several underwriters	02/02/2021

Type	Name	Date
By-Laws	Amended and Restated Bylaws of the Company	08/04/2022

Type	Name	Date
Merger agreement	Agreement and Plan of Merger, by and among Pyxis Oncology, Inc., Ascent Merger Sub Corp. and Apexigen, Inc	05/24/2023