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Form 3 - Initial statement of beneficial ownership of securities:
SEC Accession No. 0001209191-20-042320
Filing Date
2020-07-13
Accepted
2020-07-13 19:05:53
Documents
1
Period of Report
2020-06-29

Document Format Files

Seq Description Document Type Size
1 FORM 3 SUBMISSION doc3.html 3  
1 FORM 3 SUBMISSION doc3.xml 3 6132
  Complete submission text file 0001209191-20-042320.txt   8917
Mailing Address 100 TECHNOLOGY SQUARE 5TH FLOOR CAMBRIDGE MA 02139
Business Address 100 TECHNOLOGY SQUARE 5TH FLOOR CAMBRIDGE MA 02139 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 TECHNOLOGY SQUARE, 10TH FLOOR CAMBRIDGE MA 02139
Business Address 400 TECHNOLOGY SQUARE, 10TH FLOOR CAMBRIDGE MA 02139 857-201-2700
Atlas Venture Opportunity Fund I, L.P. (Reporting) CIK: 0001759241 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38541 | Film No.: 201026064

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 Associates Opportunity I, L.P. (Reporting) CIK: 0001780065 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38541 | Film No.: 201026065

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 Associates Opportunity I, LLC (Reporting) CIK: 0001780066 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38541 | Film No.: 201026066