0001209191-20-039768.txt : 20200701 0001209191-20-039768.hdr.sgml : 20200701 20200701164813 ACCESSION NUMBER: 0001209191-20-039768 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20200629 FILED AS OF DATE: 20200701 DATE AS OF CHANGE: 20200701 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Booth Bruce CENTRAL INDEX KEY: 0001451612 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38541 FILM NUMBER: 201005843 MAIL ADDRESS: STREET 1: 890 WINTER STREET STREET 2: SUITE 320 CITY: WALTHAM STATE: MA ZIP: 02451 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Magenta Therapeutics, Inc. CENTRAL INDEX KEY: 0001690585 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 100 TECHNOLOGY SQUARE STREET 2: 5TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 857-201-2700 MAIL ADDRESS: STREET 1: 100 TECHNOLOGY SQUARE STREET 2: 5TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 4 1 doc4.xml FORM 4 SUBMISSION X0306 4 2020-06-29 0 0001690585 Magenta Therapeutics, Inc. MGTA 0001451612 Booth Bruce C/O MAGENTA THERAPEUTICS, INC. 100 TECHNOLOGY SQ, 5TH FLOOR CAMBRIDGE MA 02139 1 0 0 0 Common Stock 2020-06-29 4 P 0 1250000 8.00 A 1250000 I See footnote Common Stock 4117125 I See footnote The shares are held directly by Atlas Venture Opportunity Fund I, L.P. ("Atlas Venture Opportunity Fund I"). The general partner of Atlas Venture Opportunity Fund I is Atlas Venture Associates Opportunity I, L.P. ("AVAO I LP"). Atlas Venture Associates Opportunity I, LLC ("AVAO I LLC") is the general partner of AVAO I LP. Dr. Booth is a member of AVAO I LLC and disclaims beneficial ownership of such securities held by Atlas Venture Opportunity Fund I, except to the extent of his pecuniary interest therein, if any. The shares are held directly by Atlas Venture Fund X, L.P. ("AVF X"). The general partner of AVF X is Atlas Venture Associates X, L.P. ("AVA X LP"). Atlas Venture Associates X, LLC ("AVA X LLC") is the general partner of AVA X LP. Dr. Booth is a member of AVA X LLC and disclaims beneficial ownership of such securities held by AVF X, except to the extent of his pecuniary interest therein, if any. /s/ Ommer Chohan, Attorney-in-Fact for Bruce Booth 2020-07-01