X0306 4 2015-10-16 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 2015-10-16 4 A 0 55888 0.00 A 89979 D Common Stock 238500 I See Footnote Common Stock 238500 I See Footnote Common Stock 866193 I See Footnote On October 16, 2015 the reporting person was granted 55,888 restricted stock units ("RSUs"). Each RSU represents the right to receive, at settlement, one share of common stock. Twenty-five percent of the RSU's vest on the six-month anniversary of the vesting commencement date. The remaining 75% of the RSU's vest in equal consecutive six-month installments thereafter subject to participant's continued status as a service provider. All or a portion of the unvested shares are subject to acceleration upon the occurrence of certain events. Herbert D. Cunitz and Laura J. Cunitz, Trustees of the Cunitz 2014 Irrevocable Trust fbo Jaclyn L. Cunitz Herbert D. Cunitz and Laura J. Cunitz, Trustees of the Cunitz 2014 Irrevocable Trust fbo Graham M. 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 2015-10-20