Momenta Pharmaceuticals, Inc. (MNTA)

[DewDiligence]

MNTA Major Shareholders

[Updated for 2Q12 13F-HR filings. T Rowe Price, FMR,
and Blackrock increased their holdings slightly, while
Palo Alto Investors decreased theirs.]


The table below shows all shareholders who filed their MNTA holdings
on SEC Form 13G in Feb 2012 (or later); the holdings are updated quarterly
for filings on Form 13F-HR (except Novartis) and are accurate as of 6/30/12.
The percentages in the table are based on 54.3M diluted shares (#msg-76922372)
and do not concur with the percentages on Form 13G, which use a different formula.

 
                            Shares    Stake 
 Scopia Mgmt               5,104,375   9.4% 
 Novartis                  4,708,679   8.7% 
 T Rowe Price              3,831,877   7.1% 
 Fidelity (FMR)            2,639,970   4.9%  
 BlackRock Fund Advsrs     2,339,920   4.3% 
 Discovery Capital Mgmt    2,307,639   4.3% 
 Palo Alto Investors       1,877,876   3.5%