EXHIBIT A

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the Common Stock of Syndax Pharmaceuticals, Inc. and further agree that this agreement be included as an exhibit to such filing. Each party to the agreement expressly authorizes each other party to file on its behalf any and all amendments to such statement. Each party to this agreement agrees that this joint filing agreement may be signed in counterparts.

In evidence whereof, the undersigned have caused this Agreement to be executed on their behalf this 11th day of February, 2021.

 

MPM BIOVENTURES IV-QP, L.P.						MPM BIOVENTURES IV GMBH & CO. BETEILIGUNGS KG
By:		MPM BioVentures IV GP LLC, its General Partner				By:		MPM BioVentures IV GP LLC, in its capacity as the Managing Limited Partner
By:		MPM BioVentures IV LLC, its Managing Member				By:		MPM BioVentures IV LLC, its Managing Member
By:		/s/ Luke Evnin				By:		/s/ Luke Evnin
		Name: Luke Evnin						Name: Luke Evnin
		Title: Member						Title: Member

 

MPM ASSET MANAGEMENT INVESTORS BV4 LLC						MPM BIOVENTURES IV STRATEGIC FUND, L.P.
By:		MPM BioVentures IV LLC, its Manager				By:		MPM BioVentures IV GP LLC, its General Partner
By:		/s/ Luke Evnin				By:		MPM BioVentures IV LLC,
		Name: Luke Evnin						its Managing Member
		Title: Member
						By:		/s/ Luke Evnin
								Name: Luke Evnin
								Title: Member

 

MPM BIOVENTURES IV GP LLC						MPM BIOVENTURES IV LLC
By:		MPM BioVentures IV LLC,				By:		/s/ Luke Evnin
		its Managing Member				Name:		Luke Evnin
						Title:		Member
By:		/s/ Luke Evnin
Name:		Luke Evnin
Title:		Member
By:		/s/ Luke Evnin				By:		/s/ Ansbert Gadicke
		Name: Luke Evnin						Name: Ansbert Gadicke
By:		/s/ Todd Foley
		Name: Todd Foley

 

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