X0306 4/A 2017-07-18 2017-07-20 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 2017-07-18 4 A 0 96150 0.00 A 271793 D On July 18, 2017, the Reporting Person was granted 96,150 restricted stock units ("RSUs"). Each RSU represents the right to receive, at settlement, one share of common stock. One-eighth (1/8) of such RSUs shall vest and become releasable on November 9, 2017, and thereafter, the balance of the RSUs shall vest and become releasable in a series of seven (7) successive 3-month installments over the following twenty-one (21) months thereafter, all subject to grantee's continued status as a service provider. All or portion of the unvested RSUs are subject to acceleration upon the occurrence of certain events. In the original Form 4, this footnote incorrectly stated the number of RSUs granted to the reporting person. This amendment is being filed solely to correct that error. Chief Accounting Officer, Corporate Controller and Principal Accounting Officer /s/ Anne Kuykendall as Attorney-in-Fact for Scott Reasoner 2017-07-21