X0306 4 2016-05-27 0 0001610532 Hortonworks, Inc. HDP 0001626708 Cunitz Herbert C/O HORTONWORKS, INC. 5470 GREAT AMERICA PARKWAY SANTA CLARA CA 95054 0 1 0 0 President Common Stock 2016-05-27 4 A 0 125000 0.00 A 227858 D Common Stock 230900 I See Footnote Common Stock 230900 I See Footnote Common Stock 858593 I See Footnote On May 27, 2016 the Reporting Person was granted 125,000 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. Herbert D. Cunitz and Laura J. Cunitz, Trustees of the Cunitz 2014 Irrevocable Trust fbo Jaclyn Cunitz. Herbert D. Cunitz and Laura J. Cunitz, Trustees of the Cunitz 2014 Irrevocable Trust fbo Graham Cunitz. Herbert D. Cunitz and Laura J. Cunitz, Trustees of the Herbert D. Cunitz Trust dated March 17, 2000. /s/ David Howard as Attorney-in-Fact for Herbert Cunitz 2016-06-01