EX-99.A 2 d677590dex99a.htm EX-A

EX-A

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 Macrogenics, 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 11^th day of February, 2014.

MPM BIOVENTURES II, L.P.						MPM BIOVENTURES II-QP, L.P.
By:		MPM Asset Management II, L.P., its General Partner				By:		MPM Asset Management II, L.P., its General Partner
By:		MPM Asset Management II LLC, its General Partner				By:		MPM Asset Management II LLC, its General Partner
By:		/s/ Luke Evnin				By:		/s/ Luke Evnin
		Name: Luke Evnin Title: Investment Manager						Name: Luke Evnin Title: Investment Manager
MPM BIOVENTURES GMBH & CO. PARALLEL-BETEILIGUNGS KG						MPM ASSET MANAGEMENT INVESTORS 2000B LLC
By:		MPM Asset Management II LP, in its capacity as the Special Limited Partner				By:		/s/ Luke Evnin Name: Luke Evnin Title: Investment Manager
By:		MPM Asset Management II LLC, its General Partner
By:		/s/ Luke Evnin
		Name: Luke Evnin Title: Investment Manager
MPM BIOVENTURES IV STRATEGIC FUND, L.P.
By:		MPM BioVentures IV GP LLC, its General Partner
By:		MPM BioVentures IV LLC, its Managing Member
By:		/s/ Luke Evnin
		Name: Luke Evnin Title: Member
MPM ASSET MANAGEMENT II L.P.						MPM ASSET MANAGEMENT II LLC
By:		MPM Asset Management II LLC, its General Partner				By:		/s/ Luke Evnin
By:		/s/ Luke Evnin						Name: Luke Evnin Title: Investment Manager
		Name: Luke Evnin Title: Investment Manager

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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
/s/ Ansbert Gadicke						/s/ Luke Evnin
Ansbert Gadicke						Luke Evnin
/s/ Nicholas Galakatos						/s/ Michael Steinmetz
Nicholas Galakatos						Michael Steinmetz
/s/ Kurt Wheeler						/s/ Todd Foley
Kurt Wheeler						Todd Foley
/s/ James Paul Scopa						/s/ Vaughn M. Kailian
James Paul Scopa						Vaughn M. Kailian

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