0000899243-18-018342.txt : 20180627 0000899243-18-018342.hdr.sgml : 20180627 20180627163634 ACCESSION NUMBER: 0000899243-18-018342 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20180625 FILED AS OF DATE: 20180627 DATE AS OF CHANGE: 20180627 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Atlas Venture Fund X, L.P. CENTRAL INDEX KEY: 0001628098 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38541 FILM NUMBER: 18922154 BUSINESS ADDRESS: STREET 1: 400 TECHNOLOGY SQUARE STREET 2: 10TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 857-201-2700 MAIL ADDRESS: STREET 1: 400 TECHNOLOGY SQUARE STREET 2: 10TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: ATLAS VENTURE ASSOCIATES X, L.P. CENTRAL INDEX KEY: 0001742766 STATE OF INCORPORATION: DE FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38541 FILM NUMBER: 18922155 BUSINESS ADDRESS: STREET 1: 400 TECHNOLOGY SQ. STREET 2: 10TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 857-201-2700 MAIL ADDRESS: STREET 1: 400 TECHNOLOGY SQ. STREET 2: 10TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Atlas Venture Associates X, LLC CENTRAL INDEX KEY: 0001742765 STATE OF INCORPORATION: DE FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38541 FILM NUMBER: 18922156 BUSINESS ADDRESS: STREET 1: 400 TECH. SQ. STREET 2: 10TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 857-201-2700 MAIL ADDRESS: STREET 1: 400 TECH. SQ. STREET 2: 10TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 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: 245 FIRST STREET STREET 2: 4TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: 857-201-2700 MAIL ADDRESS: STREET 1: 245 FIRST STREET STREET 2: 4TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02142 4 1 doc4.xml FORM 4 SUBMISSION X0306 4 2018-06-25 0 0001690585 Magenta Therapeutics, Inc. MGTA 0001628098 Atlas Venture Fund X, L.P. 400 TECHNOLOGY SQ., 10TH FLOOR CAMBRIDGE MA 02139 0 0 1 0 0001742766 ATLAS VENTURE ASSOCIATES X, L.P. 400 TECHNOLOGY SQ., 10TH FL. CAMBRIDGE MA 02139 0 0 1 0 0001742765 Atlas Venture Associates X, LLC 400 TECHNOLOGY SQ., 10TH FL. CAMBRIDGE MA 02139 0 0 1 0 Common Stock 2018-06-25 4 C 0 4746876 A 4843625 D Series A Preferred Stock 2018-06-25 4 C 0 12061496 D Common Stock 4667797 0 D Series B Preferred Stock 2018-06-25 4 C 0 204339 D Common Stock 79079 0 D The Series A Preferred Stock and Series B Preferred Stock (collectively, the "Preferred Stock") converted into Common Stock on a 2.58398:1 basis upon the closing of the Issuer's initial public offering on June 25, 2018. The Preferred Stock had no expiration date. The shares are held directly by Atlas Venture Fund X, L.P. ("Atlas Venture Fund X"). The general partner of Atlas Venture Fund 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. Each of AVA X LP and AVA X LLC disclaims Section 16 beneficial ownership of the securities held by Atlas Venture Fund X, except to the extent of its pecuniary interest therein, if any. Atlas Venture Fund X, L.P., By: Atlas Venture Associates X, L.P., its general partner, by Atlas Associates X, LLC, its general partner, By: Ommer Chohan, Chief Financial Officer /s/ Ommer Chohan 2018-06-27 Atlas Venture Associates X, LP, By: Atlas Venture Associates X, LLC, its general partner, By: Ommer Chohan, Chief Financial Officer /s/ Ommer Chohan 2018-06-27 Atlas Venture Associates X, LLC, By: Ommer Chohan, Chief Financial Officer /s/ Ommer Chohan 2018-06-27