X0306 4 2019-02-22 0 0001428522 Radius Health, Inc. RDUS 0001711694 Hoeiland Jesper C/O RADIUS HEALTH, INC. 950 WINTER STREET WALTHAM MA 02451 1 1 0 0 President and CEO Stock Option (Right to Buy) 19.18 2019-02-22 4 A 0 128000 0.00 A 2029-02-22 Common Stock 128000 128000 D Performance Stock Units 2019-02-22 4 A 0 71000 0.00 A 2029-02-22 Common Stock 71000 71000 D 25% of the shares subject to the stock option shall vest on February 22, 2020, and the remaining shares shall vest in substantially equal monthly installments over the following three years, subject to continued service with RDUS through such dates. Each restricted stock unit represents a contingent right to receive one share of RDUS common stock. 50% of the restricted stock units shall vest upon the execution of a Board approved partnership for elacestrant within twelve months from the grant date of February 22, 2019, and, assuming such performance condition is achieved, the remaining restricted stock units shall vest on the third anniversary of the grant date of February 22, 2019, subject to continued service with RDUS through such dates. /s/ Brent Hatzis-Schoch, Attorney-in-Fact 2019-02-26