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Institutional Investment Manager
MPM ASSET MANAGEMENT LLC
MPM ASSET MANAGEMENT LLC (CIK: 0001263048) incorporated in Delaware, located at 399 Boylston Street, Suite 1100, Boston, MA. Institutional holdings reported to the SEC.

Institutional Holdings (2015Q2)
Portfolio Summary: 15 holdings with a total value of $597,628,000.
#
Name
Shares
Value ($)
%
Options
Notes
1 RADIUS HEALTH 5,831,253 394,776,000 66.06%
2 PORTOLA PHARMACEUTICALS INC 1,220,672 55,602,000 9.30%
3 EPIZYME INC COM 1,781,086 42,746,000 7.15%
4 ARATANA THERAPEUTICS INC COM 2,118,845 32,037,000 5.36%
5 NEVRO CORP 356,704 19,173,000 3.21%
6 Proteon Therapeutics 983,381 17,563,000 2.94%
7 PHARMATHENE INC COM 6,347,614 11,426,000 1.91%
8 TRIVASCULAR TECHNOLOGIES INC 1,776,692 9,505,000 1.59%
9 VERASTEM INC COM 816,683 6,158,000 1.03%
10 CONATUS PHARMACEUTICALS INC COM 1,192,080 6,139,000 1.03%
11 MAST THERAPEUTICS 2,551,851 1,250,000 0.21%
12 ENTEROMEDICS INC 1,113,168 690,000 0.12%
13 SANGAMO BIOSCIENCES INCORPORATED 22,487 249,000 0.04%
14 COLUCID PHARMACEUTICALS INC COM 21,806 194,000 0.03%
15 MACROGENICS INC 3,168 120,000 0.02%

Portfolio data is normalized using SEC Form 13F filings, including the Original 13F-HR (0000950123-15-007803, filed 2015.07.29).

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.