Bipul Sinha - 12 Sep 2025 SCHEDULE 13D/A Report for RUBRIK, INC. Class A Common Stock (RBRK)

Filing manager: Bipul Sinha
Reporting owner: Bipul Sinha
Security: RUBRIK, INC. Class A Common Stock
Beneficially owned shares: 13,791,466 shares
Large-stake signal: Form
SCHEDULE 13D/A
Active or control-oriented beneficial ownership filing.
Ownership
8.9%
Beneficial ownership of this reported class.
Shares
13,791,466 shares
Shares beneficially owned as disclosed.
Event date
12 Sep 2025
Date tied to the ownership event or amendment.
Accepted by SEC
12 Sep 2025
EDGAR acceptance date.
How to read this large-stake filing
Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
Compare this filing with the holder history and issuer page before treating the percentage as a current position.
Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership: 8.9%
Symbol: RBRK
Shares outstanding: 154,960,292 shares
SEC form: SCHEDULE 13D/A
Accepted by SEC: 12 Sep 2025, 19:18:49 UTC
Event date: 12 Sep 2025
Prior SEC filing: 01 Apr 2025
Source filing: View source filing

Key filing fact

Bipul Sinha disclosed 8.9% ownership in RUBRIK, INC. Class A Common Stock (RBRK) on 12 Sep 2025.

Key facts

This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

Reporting persons

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name	Ownership	Shares owned	Sole voting power	Shared voting power	Signature	Title	CIK
Bipul Sinha	8.9%	13,791,466	13,791,466	0	/s/ Bipul Sinha	Bipul Sinha	0001685768

CIK / CUSIP context first

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