JANA Partners Management, LP - 26 Mar 2026 SCHEDULE 13D/A Report for Rapid7, Inc. Common Stock, par value $0.01 per share (RPD)

Filing manager: JANA Partners Management, LP
Reporting owner: JANA Partners Management, LP
Security: Rapid7, Inc. Common Stock, par value $0.01 per share
Beneficially owned shares: 6,760,149 shares
Large-stake signal: Form
SCHEDULE 13D/A
Active or control-oriented beneficial ownership filing.
Ownership
10%
Beneficial ownership of this reported class.
Shares
6,760,149 shares
Shares beneficially owned as disclosed.
Event date
26 Mar 2026
Date tied to the ownership event or amendment.
Accepted by SEC
30 Mar 2026
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: 10%
Symbol: RPD
Shares outstanding: 65,632,515 shares
SEC form: SCHEDULE 13D/A
Accepted by SEC: 30 Mar 2026, 18:36:42 UTC
Event date: 26 Mar 2026
Prior SEC filing: 13 Aug 2025
Source filing: View source filing

Key filing fact

JANA Partners Management, LP disclosed 10% ownership in Rapid7, Inc. Common Stock, par value $0.01 per share (RPD) on 26 Mar 2026.

Key facts

JANA Partners Management, LP filed SCHEDULE 13D/A for Rapid7, Inc. Common Stock, par value $0.01 per share (RPD).
Disclosed ownership: 10%.
Date of event: 26 Mar 2026.

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
JANA Partners Management, LP	10%	6,760,149	6,760,149	0	/s/ Jennifer Fanjiang	Jennifer Fanjiang, Partner, Chief Legal Officer and Chief Compliance Officer	0001998597

CIK / CUSIP context first

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