X0306 5 2015-12-31 0 0 0 0001610532 Hortonworks, Inc. HDP 0001219230 FENTON PETER H 2965 WOODSIDE ROAD WOODSIDE CA 94062 1 0 1 0 Common Stock 16309 D Common Stock 296397 I By Benchmark Capital Partners VI, L.P. Common Stock 6336803 I By Benchmark Capital Partners VII, L.P. Includes 9,375 shares of common stock acquired upon the vesting and settlement of restricted stock units that were previously reported on a Form 4 filed with the SEC on December 16, 2014, which restricted stock units were not reflected in the Reporting Person's subsequent Form 4 filed with the SEC on May 27, 2015. Shares held of record by Benchmark Capital Partners VI, L.P. ("BCP VI"), as nominee for BCP VI, Benchmark Founders' Fund VI, L.P. ("BFF VI"), Benchmark Founders' Fund VI-B, L.P. ("BFF VI-B") and related persons. Benchmark Capital Management Co. VI, L.L.C. ("BCMC VI"), the general partner of each of BCP VI, BFF VI and BFF VI-B, may be deemed to have sole voting and investment power over such shares. Peter H. Fenton is a managing member of BCMC VI, which serves as general partner to BCP VI, BFF VI, L.P. and BFF VI-B, L.P., and may be deemed to share voting and investment power over the shares beneficially held by such entities. Mr. Fenton and each such entity disclaims the existence of a "group" and disclaims beneficial ownership of any securities (except to the extent of such person's or entity's pecuniary interest in such securities). Shares held of record by Benchmark Capital Partners VII, L.P, ("BCP VII"), as nominee for BCP VII, Benchmark Founders' Fund VII, L.P. ("BFF VII"), Benchmark Founders' Fund VII-B, L.P. ("BFF VII-B") and related persons. Benchmark Capital Management Co. VII, L.L.C. ("BCMC VII"), the general partner of each of BCP VII, BFF VII and BFF VII-B, may be deemed to have sole voting and investment power over such shares. Peter H. Fenton is a managing member of BCMC VII, which serves as general partner to BCP VII, BFF VII and BFF VII-B, and may be deemed to share voting and investment power over the shares beneficially held by such entities. Mr. Fenton and each such entity disclaims the existence of a "group" and disclaims beneficial ownership of any securities (except to the extent of such person's or entity's pecuniary interest in such securities). /s/ Steven M. Spurlock, Authorized Signatory 2016-02-16