X0609 4 2026-08-31 0 0001169561 COMMVAULT SYSTEMS INC CVLT 0001765820 Mirchandani Sanjay false 1 COMMVAULT WAY TINTON FALLS NJ 07724 1 1 0 0 President & CEO 0 Common Stock 2026-08-31 4 G 0 37372 0 D 18628 I By Sanjay S. Mirchandani 2025 GRAT Common Stock 2026-08-31 4 G 0 37372 0 A 37372 I By Sanjay S. Mirchandani Revocable Trust Represents a transfer of 37,372 shares previously reported as held by Sanjay S. Mirchandani 2025 GRAT to Sanjay S. Mirchandani Revocable Trust, of which the reporting person is the trustee and grantor, and which is for the benefit of the reporting person and the reporting person's children. The reporting person maintains indirect beneficial ownership of such shares. This is not a market transaction, thus no price has been reported. /s/ Danielle Abrahamsen, Attorney-in-Fact 2026-09-02