X0306 4 2016-01-01 0 0001235010 MOMENTA PHARMACEUTICALS INC MNTA 0001256088 GEMAYEL GEORGES C/O MOMENTA PHARMACEUTICALS, INC. 675 WEST KENDALL STREET CAMBRIDGE MA 02142 1 0 0 0 Stock Option (Right to Buy) 14.84 2016-01-01 4 A 0 30000 0 A 2019-01-01 2026-01-01 Common Stock 30000 30000 D Represents options granted by the issuer pursuant to the issuer's 2013 Stock Incentive Plan. Subject to certain criteria such options vest with 10,000 shares of such option one year following the date of grant and 20,000 shares of such option to vest thereafter in equal quarterly installments over the next two year period. /s/ Marie T. Washburn as attorney in fact 2016-01-05