As of November 7, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Rapid7 Inc. The largest reported stake is JANA Partners Management, LP's, at 10.3%. 9 filings are on record since July 29, 2025 (Schedule 13D/A, March 30, 2026).
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Key facts
- · Reporting person: Vanguard Portfolio Management · Sole voting: 394,495 · Shared voting: 0 · Sole dispositive: 4,414,950 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-31
- · Holder: Vanguard Portfolio Management · Percent: 8.31% · SCHEDULE 13G/A
- · Holder: JANA Partners Management, LP · Percent: 10.3% · SCHEDULE 13D/A
- · Holder: The Vanguard Group · Percent: 0% · SCHEDULE 13G/A
- · Holder: The Vanguard Group · Percent: 14.16% · SCHEDULE 13G/A
Rapid7 Inc has 9 Schedule 13D or 13G filings on record since 2025-07-29. 3 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Layoffs on record: 1 filing or notice, latest 2026-08-10 (layoff filings and notices).
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| JANA Partners Management, LP | 10.3% | 6,760,149 | SCHEDULE 13D/A, 2026-03-30 | 2026-03-26 |
| BlackRock, Inc. | 9.1% | 5,913,948 | SCHEDULE 13G/A, 2025-10-17 | 2025-09-30 |
| Vanguard Portfolio Management | 6.6% | 4,414,950 | SCHEDULE 13G/A, 2026-07-31 | 2026-06-30 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
| UBS Group AG | 0% | 0 | SCHEDULE 13G/A, 2025-07-29 | 2025-06-30 |
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Keep reading
More on Rapid7 Inc and the records around it.
Rapid7 Inc elsewhere on the record
- Leadership changes Aug 2026
- Layoff notices Aug 2026
- Who owns it
Companies that share a holder
- JANA Partners Management, LP also filed stake reports on 4 other companies: ALKAMI TECHNOLOGY, INC. (Oct 2026), TreeHouse Foods, Inc. (Feb 2026), Lamb Weston Holdings, Inc. (Jul 2025)
- UBS Group AG also filed stake reports on 13 other companies: Freight Technologies, Inc. (Nov 2026), Rising Dragon Acquisition Corp. (Nov 2026), Starlink AI Acquisition Corp (Nov 2026)
- Vanguard Portfolio Management also filed stake reports on 941 other companies: Newmark Group Inc (Nov 2026), A10 Networks Inc (Oct 2026), ADT Inc (Oct 2026)
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What the Full Report on Rapid7 Inc covers
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What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Vanguard Portfolio Management | 394,495 | 0 | 4,414,950 | 0 | SCHEDULE 13G/A, 2026-07-31 |
The latest filing identifies Rapid7 Inc by CUSIP 753422104 and gives its principal executive office as 120 Causeway Street, Suite 400, Boston, MA 02114 (SCHEDULE 13G/A, 2026-07-31).
Purpose of Transaction (Item 4)
JANA Partners Management, LP
Item 4 is hereby amended and supplemented as follows: On March 26, 2026, the Reporting Person entered into a Nomination and Support Agreement with the Issuer (the "Nomination and Support Agreement"), pursuant to which, among other things, the Issuer agreed to nominate Kevin Galligan ("Mr. Galligan") to the Issuer's slate of recommended nominees standing for election at its 2026 annual meeting of stockholder and to solicit proxies in support of his election. Pursuant to the Nomination and Support Agreement, the Reporting Person is now permitted to acquire beneficial ownership of up to 19.9% of the Issuer's Shares, and the Board has approved any such acquisition for the purposes of certain provisions of the Delaware General Corporation Law. The summary of the Nomination and Support Agreement does not purport to be complete and the full text of the Nomination and Support Agreement is included as Exhibit 99.4 and is incorporated by reference herein.Item 4 of the SCHEDULE 13D/A filed 2026-03-30
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-29 | The Vanguard Group | 12.49% | SCHEDULE 13G/A |
| 2025-07-29 | UBS Group AG | 0% | SCHEDULE 13G/A |
| 2025-08-13 | Jana Partners Management, LP | 10.1% | SCHEDULE 13D/A |
| 2025-10-17 | BlackRock, Inc. | 9.1% | SCHEDULE 13G/A |
| 2026-01-30 | The Vanguard Group | 14.16% | SCHEDULE 13G/A |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-03-30 | JANA Partners Management, LP | 10.3% | SCHEDULE 13D/A |
| 2026-04-29 | Vanguard Portfolio Management | 8.31% | SCHEDULE 13G/A |
| 2026-07-31 | Vanguard Portfolio Management | 6.6% | SCHEDULE 13G/A |
Questions about who owns Rapid7 Inc
Who owns Rapid7 Inc?
On this page, 3 holders' latest ownership filings report 5% or more of Rapid7 Inc: JANA Partners Management, LP (10.3%, Schedule 13D/A, filed 2026-03-30), BlackRock, Inc. (9.1%, Schedule 13G/A, filed 2025-10-17) and Vanguard Portfolio Management (6.6%, Schedule 13G/A, filed 2026-07-31).
Who are the largest shareholders of Rapid7 Inc?
By the share each holder's latest filing reports, the largest holders of Rapid7 Inc on this page are JANA Partners Management, LP (10.3%), BlackRock, Inc. (9.1%) and Vanguard Portfolio Management (6.6%).
When did JANA Partners Management, LP buy into Rapid7 Inc?
The filings give report dates, not purchase dates. The earliest filing from JANA Partners Management, LP on this page is the Schedule 13D/A, filed 2025-08-13, reporting 10.1%; its latest, Schedule 13D/A filed 2026-03-30, reports 10.3%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 9 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Rapid7 Inc
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| August 31, 2026 | Leadership change: Maria Barrett appointed, and 1 more | — | Leadership changes | Source |
| June 1, 2026 | Leadership change: Wael Mohamed appointed, Chief Executive Officer | — | Leadership changes | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.