As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

  4/7/17  Flagship Ventures Fund 2007, L.P. SC 13D/A               1:121K Carisma Therapeutics Inc.         Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund IV General Partner LLC³
          Flagship Ventures Fund IV, L.P.³
          Flagship Ventures Fund IV-RX, L.P.³
          Noubar B. Afeyan, Ph.D.³
 2/13/17  Flagship Ventures Fund 2007, L.P. SC 13G/A               2:140K Seres Therapeutics, Inc.          Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund IV General Partner LLC³
          Flagship Ventures Fund IV, L.P.³
          Flagship Ventures Fund IV-RX, L.P.³
          Flagship Ventureslabs IV, LLC³
          Noubar B. Afeyan, Ph.D.³
 2/13/17  Flagship Ventures Fund 2007, L.P. SC 13G/A               2:76K  Agios Pharmaceuticals, Inc.       Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Noubar B. Afeyan, Ph.D.³
11/30/16  Flagship Ventures Fund 2007, L.P. SC 13D/A               1:118K Carisma Therapeutics Inc.         Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund IV General Partner LLC³
          Flagship Ventures Fund IV, L.P.³
          Flagship Ventures Fund IV-RX, L.P.³
          Noubar B. Afeyan, Ph.D.³
11/18/16  Flagship Ventures Fund 2007, L.P. SC 13D/A               1:117K Carisma Therapeutics Inc.         Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund IV General Partner LLC³
          Flagship Ventures Fund IV, L.P.³
          Flagship Ventures Fund IV-RX, L.P.³
          Noubar B. Afeyan, Ph.D.³
 9/23/16  Flagship Ventures Fund 2007, L.P. SC 13D/A               1:120K Carisma Therapeutics Inc.         Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund IV General Partner LLC³
          Flagship Ventures Fund IV, L.P.³
          Flagship Ventures Fund IV-RX, L.P.³
          Noubar B. Afeyan, Ph.D.³
 9/19/16  Flagship Ventures Fund 2007, L.P. SC 13D/A               2:131K Carisma Therapeutics Inc.         Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund IV General Partner LLC³
          Flagship Ventures Fund IV, L.P.³
          Flagship Ventures Fund IV-RX, L.P.³
          Noubar B. Afeyan, Ph.D.³
 2/16/16  Flagship Ventures Fund 2007, L.P. SC 13G                 2:153K Seres Therapeutics, Inc.          Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Venturelabs IV, LLC³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund IV General Partner LLC³
          Flagship Ventures Fund IV, L.P.³
          Flagship Ventures Fund IV-RX, L.P.³
          Noubar B. Afeyan, Ph.D.³
 2/12/15  Flagship Ventures Fund 2007, L.P. SC 13G/A               1:82K  Agios Pharmaceuticals, Inc.       Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Noubar B. Afeyan Ph.D.³
 2/20/14  Flagship Ventures Fund 2007, L.P. SC 13D/A               1:146K Tetraphase Pharmaceuticals Inc.   Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund 2004, L.P.³
          Flagship Ventures General Partner LLC³
          Noubar B. Afeyan, Ph.D.³
 2/20/14  Flagship Ventures Fund 2007, L.P. SC 13D/A               1:105K Receptos, Inc.                    Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Noubar B. Afeyan, Ph.D.³
 2/13/14  Flagship Ventures Fund 2007, L.P. SC 13D                 2:199K Carisma Therapeutics Inc.         Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund IV General Partner LLC³
          Flagship Ventures Fund IV, L.P.³
          Flagship Ventures Fund IV-RX, L.P.³
          Noubar B. Afeyan, Ph.D.³
 2/10/14  Flagship Ventures Fund 2007, L.P. SC 13G                 1:92K  Agios Pharmaceuticals, Inc.       Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Noubar B. Afeyan Ph.D.³
12/19/13  Flagship Ventures Fund 2007, L.P. SC 13D/A               1:155K Tetraphase Pharmaceuticals Inc.   Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund 2004, L.P.³
          Flagship Ventures General Partner LLC³
          Noubar B. Afeyan, Ph.D.³
11/25/13  Flagship Ventures Fund 2007, L.P. SC 13D/A               1:109K Receptos, Inc.                    Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Noubar B. Afeyan, Ph.D.³
 5/29/13  Flagship Ventures Fund 2007, L.P. SC 13D                 2:192K Tetraphase Pharmaceuticals Inc.   Donnelley … Solutions/FA 
          Edwin M. Kania, Jr.³
          Flagship Ventures 2007 General Partner LLC³
          Flagship Ventures Fund 2004, L.P.³
          Flagship Ventures General Partner LLC³
          Noubar B. Afeyan, Ph.D.³

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¹	Filing/Form Types:
	SC 13D	Statement of Acquisition of Beneficial Ownership by an “Active” Investor — Schedule 13D.
	SC 13G	Statement of Acquisition of Beneficial Ownership by a “Passive” Investor — Schedule 13G.
	/A	Amendment to, or Amended version of, a previous Filing of this Type.
³	Group Member:  A Registrant or non-Registrant party to this Filing made by a Group.