X0306 4 2016-05-27 0 0001610532 Hortonworks, Inc. HDP 0001415326 Reasoner Scott C/O HORTONWORKS, INC. 5470 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 0 1 0 0 See Remarks Common Stock 2016-05-27 4 A 0 50000 0.00 A 141356 D On May 27, 2016 the Reporting Person was granted 50,000 restricted stock units ("RSUs"). Each RSU represents the right to receive, at settlement, one share of common stock. One-half of the original grant shall vest and become releasable on the first anniversary of the vesting commencement date, and thereafter the balance of the RSU shall vest and become releasable in a series of two (2) successive equal six-month installments measured from the first anniversary of the vesting commencement date, subject to the participant's status as a service provider. VP, Corp Controller & Principal Accounting Officer /s/ David Howard as Attorney-in-Fact for Scott Reasoner 2016-06-01