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 31st day of January, 2018.
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MPM BIOVENTURES IV-QP, L.P. |
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By: |
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MPM BioVentures IV GP LLC, |
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its General Partner |
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By: |
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MPM BioVentures IV LLC, |
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its Managing Member |
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By: |
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/s/ Xxxx Xxxxx |
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Name: Xxxx Xxxxx |
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Title: Member |
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MPM ASSET MANAGEMENT INVESTORS BV4 LLC |
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By: |
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MPM BioVentures IV LLC |
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its Manager |
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By: |
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/s/ Xxxx Xxxxx |
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Name: Xxxx Xxxxx |
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Title: Member |
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MPM BIOVENTURES IV GP LLC |
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By: |
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MPM BioVentures IV LLC, |
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its Managing Member |
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By: |
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/s/ Xxxx Xxxxx |
Name: |
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Xxxx Xxxxx |
Title: |
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Member |
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By: |
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/s/ Xxxx Xxxxx |
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Name: Xxxx Xxxxx |
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By: |
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/s/ Xxxx Xxxxx |
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Name: Xxxx Xxxxx |
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MPM BIOVENTURES IV GMBH & CO. BETEILIGUNGS KG |
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By: |
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MPM BioVentures IV GP LLC, |
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in its capacity as the Managing Limited Partner |
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By: |
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MPM BioVentures IV LLC, |
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its Managing Member |
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By: |
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/s/ Xxxx Xxxxx |
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Name: Xxxx Xxxxx |
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Title: Member |
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MPM BIOVENTURES IV STRATEGIC FUND, L.P. |
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By: |
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MPM BioVentures IV GP LLC, |
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its General Partner |
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By: |
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MPM BioVentures IV LLC, |
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its Managing Member |
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By: |
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/s/ Xxxx Xxxxx |
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Name: Xxxx Xxxxx |
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Title: Member |
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MPM BIOVENTURES IV LLC |
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By: |
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/s/ Xxxx Xxxxx |
Name: |
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Xxxx Xxxxx |
Title: |
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Member |
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By: |
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/s/ Xxxxxxx Xxxxxxx |
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Name: Xxxxxxx Xxxxxxx |