Momenta Pharmaceuticals, Inc. (MNTA)

[DewDiligence]

Vanguard increased its MNTA stake by 13% during 2013 to 3.05M shares at 12/31/13 (from 2.71M shares at 12/31/12), according to a 13-G filing today: http://www.sec.gov/Archives/edgar/data/102909/000093247114003392/momentapharmainc.htm .

In a 13-G filing yesterday, T Rowe price reported 3.70M shares of MNTA at 12/31/13, down marginally from 3.74M shares at 12/31/12:
http://www.sec.gov/Archives/edgar/data/80255/000008025514000155/mnta13gadec13.htm .

Annual 13-G filings for 5%+ shareholders are due on or before 2/14/14 (45 days from the end of the calendar year).