X0306 4 2016-09-27 1 0001428522 Radius Health, Inc. RDUS 0001358312 MPM BioVentures IV LLC C/O MPM ASSET MANAGEMENT 200 CLARENDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 0 1 Former 10% stockholder 0001356950 Scopa James Paul C/O MPM ASSET MANAGEMENT 601 GATEWAY BLVD., SUITE 350 SOUTH SAN FRANCISCO CA 94080 0 0 0 1 Former 10% stockholder 0001358311 MPM BioVentures IV GP LLC C/O MPM ASSET MANAGEMENT 200 CLARENDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 0 1 Former 10% stockholder 0001423213 MPM Bio IV NVS Strategic Fund LP C/O MPM ASSET MANAGEMENT 200 CLARENDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 0 1 Former 10% stockholder 0001180429 KAILIAN VAUGHN M C/O MPM ASSET MANAGEMENT 200 CLARENDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 0 1 Former 10% stockholder 0001473930 Foley Todd C/O MPM ASSET MANAGEMENT 200 CLAREDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 0 1 Former 10% stockholder Common Stock 2016-09-27 4 J 0 713849 0.00 D 1427698 I See footnote Represents a pro-rata in-kind distribution of Common Stock of the Issuer by MPM Bio IV NVS Strategic Fund, L.P. ("MPM NVS"), without consideration to its limited partners. The shares are held by MPM NVS. MPM BioVentures IV GP LLC ("BV IV GP LLC") and MPM BioVentures IV LLC ("BV IV LLC") are the direct and indirect general partners of MPM NVS. Luke Evnin, Ansbert Gadicke, Todd Foley, Vaughn M. Kailian and James Paul Scopa are the members of BV IV LLC. Each reporting person disclaims beneficial ownership of the securities reported herein except to the extent of his or its respective pecuniary interest therein. /s/ Luke Evnin, Series A Member of MPM BioVentures IV LLC 2016-09-29 /s/ James Paul Scopa 2016-09-29 /s/ Luke Evnin, Member of MPM BioVentures IV LLC, the Managing Member of MPM BioVentures IV GP LLC 2016-09-29 /s/ Luke Evnin, Member of MPM BioVentures IV LLC, the Managing Member of MPM BioVentures IV GP LLC, the general partner of MPM Bio IV NVS Strategic Fund, L.P. 2016-09-29 /s/ Vaughn M. Kailian 2016-09-29 /s/ Todd Foley 2016-09-29