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Form 3 - Initial statement of beneficial ownership of securities:
SEC Accession No. 0000899243-18-017522
Filing Date
2018-06-20
Accepted
2018-06-20 20:44:28
Documents
1
Period of Report
2018-06-20

Document Format Files

Seq Description Document Type Size
1 FORM 3 SUBMISSION doc3.html 3  
1 FORM 3 SUBMISSION doc3.xml 3 7976
  Complete submission text file 0000899243-18-017522.txt   10662
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. (Reporting) CIK: 0001628098 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38541 | Film No.: 18910726

Mailing Address 245 FIRST STREET 4TH FLOOR CAMBRIDGE MA 02142
Business Address 245 FIRST STREET 4TH FLOOR CAMBRIDGE MA 02142 857-201-2700
Magenta Therapeutics, Inc. (Issuer) CIK: 0001690585 (see all company filings)

IRS No.: 000000000 | State of Incorp.: DE | Fiscal Year End: 1231
SIC: 2834 Pharmaceutical Preparations

Mailing Address 400 TECH. SQ. 10TH FLOOR CAMBRIDGE MA 02139
Business Address 400 TECH. SQ. 10TH FLOOR CAMBRIDGE MA 02139 857-201-2700
Atlas Venture Associates X, LLC (Reporting) CIK: 0001742765 (see all company filings)

State of Incorp.: DE
Type: 3 | Act: 34 | File No.: 001-38541 | Film No.: 18910728

Mailing Address 400 TECHNOLOGY SQ. 10TH FLOOR CAMBRIDGE MA 02139
Business Address 400 TECHNOLOGY SQ. 10TH FLOOR CAMBRIDGE MA 02139 857-201-2700
ATLAS VENTURE ASSOCIATES X, L.P. (Reporting) CIK: 0001742766 (see all company filings)

State of Incorp.: DE
Type: 3 | Act: 34 | File No.: 001-38541 | Film No.: 18910727