X0306 4 2016-01-04 0 0001348334 BARRACUDA NETWORKS INC CUDA 0001590392 Hughes Michael D C/O BARRACUDA NETWORKS, INC. 3175 S. WINCHESTER BLVD. CAMPBELL CA 95008 0 1 0 0 SVP, Worldwide Sales Common Stock 2016-01-04 4 M 0 2300 12.39 A 59011 D Common Stock 2016-01-04 4 S 0 2300 18.11 D 56711 D Employee Stock Option (right to buy) 12.39 2016-01-04 4 M 0 2300 0.00 D 2022-05-18 Common Stock 2300 57956 D The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on 2/11/2015. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.00 to $18.35, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. One-fourth of the shares subject to the option vested on May 9, 2013 and one forty-eighth of the shares vest monthly thereafter. /s/ Diane Honda Attorney-in-Fact for Michael D Hughes 2016-01-05