MPM BioVentures IV GP LLC

• 10% owner at MEMORY PHARMACEUTICALS CORP · on record since Oct 18, 2006
• 10% owner at PEPLIN INC · on record since Oct 30, 2008
• 10% owner at Pacira Pharmaceuticals, Inc. · on record since Feb 17, 2011
• 10% owner at MPM ACQUISITION CORP · on record since May 19, 2011
• Former 10% Owner at Pacira Pharmaceuticals, Inc. · on record since Mar 13, 2013
• 10% owner at Epizyme, Inc. · on record since May 30, 2013
• 10% owner at Conatus Pharmaceuticals Inc · on record since Jul 24, 2013
• 10% owner at TriVascular Technologies, Inc. · on record since Apr 23, 2014
• 10% owner at CHIASMA, INC · on record since Jul 21, 2015
• 10% owner at Syndax Pharmaceuticals Inc · on record since Mar 9, 2016
• Former 10% stockholder at MPM ACQUISITION CORP · on record since Sep 29, 2016