Momenta Pharmaceuticals, Inc. (MNTA)

[DewDiligence]

MNTA Major Shareholders

[Updated to remove Scopia Capital Mgmt,
who sold their shares in Jul 2013.)]


The table below shows all shareholders who filed their MNTA
holdings on SEC Form 13G during the past 12 months; the
holdings are updated quarterly from filings on Form 13F-HR
and are accurate as of 6/30/13, unless otherwise specified.

The percentages in the table are based on 54.3M diluted shares
(#msg-76922372) and do not concur with the percentages on
SEC Form 13G, which uses a different formula.

 
                            Shares    Stake 
 Visium Asset Mgmt         5,050,000   9.3% 
 Novartis                  4,708,679   8.7% 
 T Rowe Price              3,744,275   6.9% 
 Fidelity (FMR)            3,297,780   6.1% 
 Vanguard                  2,706,946   5.0% 
 BlackRock Fund Advsrs     2,673,622   4.9%