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Filing Detail
Form SC 13G - Statement of Beneficial Ownership by Certain Investors:
SEC Accession No. 0001104659-18-008815
Filing Date
2018-02-13
Accepted
2018-02-13 11:04:09
Documents
1
Group Members
ATLAS VENTURE ASSOCIATES IX, L.P.ATLAS VENTURE ASSOCIATES IX, LLC

Document Format Files

Seq Description Document Type Size
1 SC 13G a18-5640_4sc13g.htm SC 13G 133476
  Complete submission text file 0001104659-18-008815.txt   135192
Mailing Address 25 FIRST ST STE 303 CAMBRIDGE MA 02141
Business Address 25 FIRST ST STE 303 CAMBRIDGE MA 02141 6175882695
Atlas Venture Associates IX, L.P. (Filed by) CIK: 0001671208 (see all company filings)

IRS No.: 461354263 | State of Incorp.: DE | Fiscal Year End: 1012
Type: SC 13G

Mailing Address 675 MASSACHUSETTS AVENUE 14TH FLOOR CAMBRIDGE MA 02139
Business Address 675 MASSACHUSETTS AVENUE 14TH FLOOR CAMBRIDGE MA 02139 857-242-1600
Spero Therapeutics, Inc. (Subject) CIK: 0001701108 (see all company filings)

IRS No.: 000000000 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G | Act: 34 | File No.: 005-90168 | Film No.: 18600709
SIC: 2834 Pharmaceutical Preparations