X0306 4 2017-10-12 0 0001353283 SPLUNK INC SPLK 0001233412 SULLIVAN GODFREY C/O SPLUNK INC. 270 BRANNAN STREET SAN FRANCISCO CA 94107 1 0 0 0 Common Stock 2017-10-12 4 M 0 25000 0.565 A 600790 D Common Stock 2017-10-12 4 S 0 40000 63.48 D 560790 D Common Stock 100000 I See footnote Employee Stock Option (right to buy) 0.565 2017-10-12 4 M 0 25000 0.00 D 2018-09-16 Common Stock 25000 362515 D The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 27, 2017. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.88 to $63.69, 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 within the ranges set forth in this footnote. Shares held directly by the Godfrey and Suzanne Sullivan Revocable Trust dated December 5, 2000 for which the Reporting Person serves as a trustee. The option is fully vested and immediately exercisable. /s/ Steve Dean, by power of attorney 2017-10-16