MPM ASSET MANAGEMENT LLC Information

450 KENDALL STREET, CAMBRIDGE, Massachusetts, 02142, (617) 425-9200

Report Date: 03/31/2015

Position Statistics

Total Positions 15
New Positions 0
Increased Positions 0
Decreased Positions 1
Positions with Activity 1
Sold Out Positions 0
Total Mkt Value (in $ millions) 665

Institutional Holdings information is filed by major institutions on form 13-F with the Securities and Exchange Commission.

Sector Weighting

Basic Materials
Capital Goods
Conglomerates
Consumer Cyclical
Consumer/Non-Cyclical
Energy
Financial
Healthcare 67.43%
Services
Technology
Transportation
Utilities

15 Positions as of 03/31/2015

Company Class Value of Shares ($1,000s) ▼ Change in Value ($1,000s) Change (%) Shares Held
RADIUS HEALTH INC COM NEW 430,113 New 5,831,253
PORTOLA PHARMACEUTICALS INC COM 59,300 New 1,220,672
EPIZYME INC COM 46,522 -5,375 (10.36) 2,163,819
ARATANA THERAPEUTICS INC COM 41,699 New 2,118,845
NEVRO CORP COM 34,527 New 686,704
PROTEON THERAPEUTICS INC COM 17,317 New 983,381
PHARMATHENE INC COM 10,601 New 6,347,614
TRIVASCULAR TECHNOLOGIES INC COM 10,234 New 1,776,692
CONATUS PHARMACEUTICALS INC COM 5,841 New 1,192,080
VERASTEM INC COM 5,839 New 816,683
MAST THERAPEUTICS INC COM 1,194 New 2,551,851
CELLADON CORP COM 993 New 800,542
ENTEROMEDICS INC COM NEW 377 New 1,113,168
SANGAMO BIOSCIENCES INC COM 199 New 22,487
MACROGENICS INC COM 113 New 3,168