X0508 4 2023-10-12 0 0001353283 SPLUNK INC SPLK 0001644821 Kayman Brian C/O SPLUNK INC. 270 BRANNAN STREET SAN FRANCISCO CA 94107 0 1 0 0 Chief Accounting Officer 0 Common Stock 2023-10-12 4 A 0 2629 0.00 A 34022 D The reported securities are represented by restricted stock units ("RSUs"). The RSUs shall vest as to (i) one-third on March 20, 2024; (ii) one-third on the closing of the transactions contemplated by the Agreement and Plan of Merger, dated September 20, 2023 by and among Cisco Systems, Inc. ("Parent"), Spirit Merger Corp., a wholly owned subsidiary of Parent, and Splunk Inc. (the "Merger"); and (iii) one-third upon the four-month anniversary of the closing of the Merger, subject, in each case, to the Reporting Person's continuous service through such date(s). /s/ Steve Dean, by power of attorney 2023-10-16