X0306 4 2013-04-23 0 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 1 0 0001356950 Scopa James Paul C/O MPM ASSET MANAGEMENT 601 GATEWAY BLVD., SUITE 350 SOUTH SAN FRANCISCO CA 94080 0 0 1 0 0001379218 Vander Vort John C/O MPM ASSET MANAGEMENT 200 CLARENDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 1 0 0001358311 MPM BioVentures IV GP LLC C/O MPM ASSET MANAGEMENT 200 CLARENDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 1 0 0001423213 MPM Bio IV NVS Strategic Fund LP C/O MPM ASSET MANAGEMENT 200 CLARENDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 1 0 0001473930 Foley Todd C/O MPM ASSET MANAGEMENT 200 CLAREDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 1 0 0001180429 KAILIAN VAUGHN M C/O MPM ASSET MANAGEMENT 200 CLARENDON STREET, 54TH FLOOR BOSTON MA 02116 0 0 1 0 Series B Convertible Preferred Stock 2013-04-23 4 P 0 71638 61.42 A Common Stock 716380 71638 I See footnote Common Stock Warrant 6.142 2013-04-23 4 P 0 179095 6.142 A 2013-04-23 2018-04-23 Common Stock 179095 179095 I See footnote Each share of Series B Convertible Preferred Stock has no expiration date and is convertible, in whole or in part, at the election of the holder at a conversion rate of 10 shares of Common Stock for every 1 share of Series B Convertible Stock. The shares and warrants are held by MPM Bio IV NVS Strategic Fund, L.P. ("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, James Paul Scopa and John Vander Vort 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, Member of MPM BioVentures IV LLC 2013-04-30 /s/ James Paul Scopa 2013-04-30 /s/ John Vander Vort 2013-04-30 /s/ Luke Evnin, Member of MPM BioVentures IV LLC, the Managing Member of MPM BioVentures IV GP LLC 2013-04-30 /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. 2013-04-30 /s/ Todd Foley 2013-04-30 Vaughn M. Kailian 2013-04-30