EXHIBIT 99.1
JOINT FILING AGREEMENT
We, the undersigned, hereby express our agreement that the attached Schedule 13G (or any amendments thereto) relating to the Class A common stock of Rubrik, Inc. on behalf of each of us.
Dated: August 14, 2026
Lightspeed Venture Partners IX, L.P. By: Lightspeed General Partner IX, L.P. Its General Partner By: Lightspeed Ultimate General Partner IX, Ltd. Its General Partner By: /s/ Ravi Mhatre Name: Ravi Mhatre Title: Director Lightspeed General Partner IX, L.P. By: Lightspeed Ultimate General Partner IX, Ltd. Its General Partner By: /s/ Ravi Mhatre Name: Ravi Mhatre Title: Director Lightspeed Ultimate General Partner IX, Ltd. By: /s/ Ravi Mhatre Name: Ravi Mhatre Title: Director Lightspeed SPV I, LLC Lightspeed SPV I-B, LLC Lightspeed SPV I-C, LLC By: LS SPV Management, LLC Its General Partner By: /s/ Ravi Mhatre Name: Ravi Mhatre Title: Managing Member LS SPV Management, LLC By: /s/ Ravi Mhatre Name: Ravi Mhatre Title: Managing Member | Lightspeed Venture Partners Select II, L.P. By: Lightspeed General Partner Select II, L.P. Its General Partner By: Lightspeed Ultimate General Partner Select II, Ltd. Its General Partner By: /s/ Ravi Mhatre Name: Ravi Mhatre Title: Director Lightspeed General Partner Select II, L.P. By: Lightspeed Ultimate General Partner Select II, Ltd. Its General Partner By: /s/ Ravi Mhatre Name: Ravi Mhatre Title: Director Lightspeed Ultimate General Partner Select II, Ltd. By: /s/ Ravi Mhatre Name: Ravi Mhatre Title: Director |