0000950123-18-004893.txt : 20180511 0000950123-18-004893.hdr.sgml : 20180511 20180511112803 ACCESSION NUMBER: 0000950123-18-004893 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20180331 FILED AS OF DATE: 20180511 DATE AS OF CHANGE: 20180511 EFFECTIVENESS DATE: 20180511 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MPM ASSET MANAGEMENT LLC CENTRAL INDEX KEY: 0001263048 IRS NUMBER: 043351032 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-13379 FILM NUMBER: 18825668 BUSINESS ADDRESS: STREET 1: 450 KENDALL STREET CITY: CAMBRIDGE STATE: MA ZIP: 02142 BUSINESS PHONE: 6174259200 MAIL ADDRESS: STREET 1: 450 KENDALL STREET CITY: CAMBRIDGE STATE: MA ZIP: 02142 13F-HR 1 primary_doc.xml 13F-HR LIVE false true false 0001263048 XXXXXXXX 03-31-2018 03-31-2018 MPM ASSET MANAGEMENT LLC

450 KENDALL STREET CAMBRIDGE MA 02142

13F HOLDINGS REPORT 028-13379 N Ansbert Gadicke (617) 425-9200 /s/ Ansbert Gadicke Cambridge MA 05-10-2018 0 9 259641 false INFORMATION TABLE 2 form13fInfoTable.xml INFORMATION TABLE FOR FORM 13F Altimmune, Inc. Common 02155H101 8 7000 SH SOLE 7000 0 0 Aratana Therapeutics Inc. Common 03874P101 1103 250000 SH SOLE 250000 0 0 Chiasma, Inc. Common 16706W102 8604 5736296 SH SOLE 5736296 0 0 Conatus Pharmaceuticals, Inc. Common 20600T108 14468 2464807 SH SOLE 2464807 0 0 Endologix, Inc. Common 29266S106 4744 1121447 SH SOLE 1121447 0 0 Proteon Therapeutics, Inc. Common 74371L109 2458 983381 SH SOLE 983381 0 0 Radius Health, Inc. Common 750469207 143736 3999343 SH SOLE 3999343 0 0 Rhythm Pharmaceuticals, Inc. Common 76243J105 53658 2696392 SH SOLE 2696392 0 0 Syndax Pharmaceuticals, Inc. Common 87164F105 30860 2168691 SH SOLE 2168691 0 0