X0306 4 2018-02-06 0 0001610532 Hortonworks, Inc. HDP 0001626707 Davidson Scott C/O HORTONWORKS, INC. 5470 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 0 1 0 0 See Remarks Common Stock 2018-02-06 4 A 0 11364 0.00 A 947375 D Common Stock 2018-02-08 4 S 0 6022 19.19 D 941353 D Common Stock 2018-02-08 4 A 0 250800 0.00 A 1192153 D Common Stock 7663 I Scott & Taryn Davidson Family Trust Dated 4/4/2006 Acquired upon the settlement of performance stock units granted on June 3, 2015 under the Issuer's Amended and Restated 2014 Stock Option and Incentive Plan. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 15, 2017. Represents the weighted average sale price for the entire number of shares sold. The sale prices range from $18.94 to $19.46 per share. The Reporting Person undertakes to provide to the staff of the SEC, the Issuer, or a stockholder of the Issuer, upon request, the number of shares sold by the Reporting Person of each separate price within the range. On February 8, 2018, the Reporting Person was granted 250,800 restricted stock units ("RSUs"). Each RSU represents the right to receive, at settlement, one share of common stock. Eighty-eight percent (88%) of such RSUs shall vest and become releaseable in a series of four (4) successive 3-month installments commencing on February 15, 2019, and thereafter, the balance of the RSUs shall vest and become releaseable on February 15, 2020, 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. Chief Financial Officer & Chief Operating Officer /s/ Anne Kuykendall as Attorney-in-Fact for Scott Davidson 2018-02-08