Atlas Venture Associates IX, LLC (0001671207)

State location: MA | State of Inc.: DE | Fiscal Year End: 1012 Business Address 56 WAREHAM STREET, FLOOR 3 BOSTON MA 02118 617-588-2694 Mailing Address 56 WAREHAM STREET, FLOOR 3 BOSTON MA 02118 Ownership Reports for Issuers: (Click on issuer name to see other owners for the issuer, or CIK for issuer filings.) Issuer Filings Transaction Date Type of Owner Surface Oncology, Inc. 0001718108 2020-12-17 10 percent owner Unum Therapeutics, Inc. Current Name:Cogent Biosciences, Inc. 0001622229 2018-03-28 10 percent owner Spero Therapeutics, Inc. 0001701108 2017-11-01 10 percent owner Intellia Therapeutics, Inc. 0001652130 2017-07-07 10 percent owner

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Acquistion or Disposition	Transaction Date	Deemed Execution Date	Issuer	Form	Transaction Type	Direct or Indirect Ownership	Number of Securities Transacted	Number of Securities Owned	Line Number	Issuer CIK	Security Name

http://www.sec.gov/cgi-bin/own-disp

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