Flagship VentureLabs IV, LLC (0001642578)

State location: MA | State of Inc.: DE | Fiscal Year End: 1231 Business Address 55 CAMBRIDGE PARKWAY, 8TH FLOOR CAMBRIDGE MA 02143 617-868-1888 Mailing Address 55 CAMBRIDGE PARKWAY, 8TH FLOOR CAMBRIDGE MA 02143 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 Axcella Health Inc. 0001633070 2019-05-08 10 percent owner Kaleido Biosciences, Inc. 0001751299 2019-02-27 10 percent owner Moderna, Inc. 0001682852 2018-12-07 10 percent owner Rubius Therapeutics, Inc. 0001709401 2018-07-17 10 percent owner Evelo Biosciences, Inc. 0001694665 2018-05-08 10 percent owner Syros Pharmaceuticals, Inc. 0001556263 2017-08-17 10 percent owner Seres Therapeutics, Inc. 0001609809 2016-05-25 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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