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Filing Detail
Form SC 13D/A - General Statement of Acquisition of Beneficial Ownership: [Amend]
SEC Accession No. 0001839882-21-002172
Filing Date
2021-02-16
Accepted
2021-02-16 17:29:25
Documents
2
Group Members
ATLAS VENTURE ASSOCIATES X, L.P.ATLAS VENTURE ASSOCIATES X, LLC

Document Format Files

Seq Description Document Type Size
1 AMENDED ACQUISITION OF BENEFICIAL OWNERSHIP spro-sc12da_021221.htm SC 13D/A 58403
2 JOINT FILING AGREEMENT ex-c.htm EX-99.C 10357
  Complete submission text file 0001839882-21-002172.txt   70501
Mailing Address 400 TECHNOLOGY SQUARE 10TH FLOOR CAMBRIDGE MA 02139
Business Address 400 TECHNOLOGY SQUARE 10TH FLOOR CAMBRIDGE MA 02139 857-201-2700
Atlas Venture Fund X, L.P. (Filed by) CIK: 0001628098 (see all company filings)

IRS No.: 472435989 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13D/A

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 13D/A | Act: 34 | File No.: 005-90168 | Film No.: 21641167
SIC: 2834 Pharmaceutical Preparations