Who owns Rapid7 (RPD)
Which tracked institutional funds hold RPD, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RPD company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on RPD is one-sided between 2025-Q4 and 2026-Q1: 18 added or opened and 103 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
RPD’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes RPD more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in RPD divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 243 tracked filers holding RPD, 153 increased or opened the position and 124 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in RPD between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 6
- VANGUARD PORTFOLIO MANAGEMENT LLC$28M
- VANGUARD CAPITAL MANAGEMENT LLC$15M
- VANGUARD FIDUCIARY TRUST CO$2M
- OCCUDO QUANTITATIVE STRATEGIES LP$2M
- Vanguard Global Advisers, LLC$2M
- Y-Intercept (Hong Kong) Ltd$1M
Full exits 24
- VANGUARD GROUP INC$141M
- Penserra Capital Management LLC$61M
- FIRST TRUST ADVISORS LP$35M
- Invenomic Capital Management LP$10M
- TWO SIGMA ADVISERS, LP$7M
- SHAPIRO CAPITAL MANAGEMENT LLC$6M
Largest adds
- HRT FINANCIAL LP$4M
- JANE STREET GROUP, LLC$3M
- ACADIAN ASSET MANAGEMENT LLC$3M
- SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC$2M
- Engineers Gate Manager LP$2M
- Brooklyn Investment Group$2M
Largest trims
- JANA Partners Management, LP$65M
- BlackRock, Inc.$63M
- UBS Group AG$28M
- UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$18M
- STATE STREET CORP$17M
- MARSHALL WACE, LLP$16M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 9,012,619 | $73M | 9.1% | 2026-Q2 |
| JANA Partners Management, LP added | 6,749,936 | $55M | 6.8% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 5,164,572 | $28M | 3.5% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 2,718,389 | $22M | 2.7% | 2026-Q2 |
| STATE STREET CORP added | 2,517,692 | $20M | 2.5% | 2026-Q2 |
| UBS Group AG added | 3,073,841 | $17M | 2.1% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 1,908,131 | $15M | 1.9% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,676,030 | $15M | 1.8% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 1,491,269 | $12M | 1.5% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 1,490,294 | $12M | 1.5% | 2026-Q2 |
| ACADIAN ASSET MANAGEMENT LLC added | 1,766,468 | $10M | 1.2% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 1,429,648 | $8M | 1.0% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 1,403,799 | $8M | 1.0% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 934,660 | $8M | 0.9% | 2026-Q2 |
| Alyeska Investment Group, L.P. trimmed | 1,133,348 | $6M | 0.8% | 2026-Q1 |
| CANADA LIFE ASSURANCE Co added | 1,079,607 | $6M | 0.7% | 2026-Q1 |
| LSV ASSET MANAGEMENT trimmed | 946,297 | $5M | 0.6% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 905,390 | $5M | 0.6% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 890,924 | $5M | 0.6% | 2026-Q1 |
| MORGAN STANLEY added | 847,962 | $5M | 0.6% | 2026-Q1 |
| SG Americas Securities, LLC added | 817,649 | $5M | 0.6% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 788,805 | $4M | 0.5% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 756,164 | $4M | 0.5% | 2026-Q1 |
| HRT FINANCIAL LP added | 720,495 | $4M | 0.5% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 692,301 | $4M | 0.5% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 641,467 | $4M | 0.4% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 427,096 | $3M | 0.4% | 2026-Q2 |
| NORTHERN TRUST CORP added | 568,771 | $3M | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 534,565 | $3M | 0.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 345,199 | $3M | 0.3% | 2026-Q2 |
| Pacer Advisors, Inc. added | 477,369 | $3M | 0.3% | 2026-Q1 |
| FMR LLC added | 318,911 | $3M | 0.3% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 457,536 | $3M | 0.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 424,677 | $2M | 0.3% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 421,517 | $2M | 0.3% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 420,545 | $2M | 0.3% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 412,019 | $2M | 0.3% | 2026-Q1 |
| Atom Investors LP added | 381,240 | $2M | 0.3% | 2026-Q1 |
| Engineers Gate Manager LP added | 359,071 | $2M | 0.2% | 2026-Q1 |
| Brooklyn Investment Group added | 348,448 | $2M | 0.2% | 2026-Q1 |
| Quinn Opportunity Partners LLC added | 347,897 | $2M | 0.2% | 2026-Q1 |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd trimmed | 321,516 | $2M | 0.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 310,448 | $2M | 0.2% | 2026-Q1 |
| Invesco Ltd. added | 211,050 | $2M | 0.2% | 2026-Q2 |
| Man Group plc added | 300,692 | $2M | 0.2% | 2026-Q1 |
| OCCUDO QUANTITATIVE STRATEGIES LP added | 269,883 | $2M | 0.2% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 281,913 | $2M | 0.2% | 2026-Q1 |
| Quantinno Capital Management LP added | 260,359 | $1M | 0.2% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 253,442 | $1M | 0.2% | 2026-Q1 |
| Walleye Capital LLC added | 251,639 | $1M | 0.2% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 241,621 | $1M | 0.2% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 241,291 | $1M | 0.2% | 2026-Q1 |
| Squarepoint Ops LLC added | 239,541 | $1M | 0.2% | 2026-Q1 |
| Creative Planning added | 236,890 | $1M | 0.2% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 232,902 | $1M | 0.2% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 228,498 | $1M | 0.2% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 138,682 | $1M | 0.1% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 193,526 | $1M | 0.1% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd added | 190,133 | $1M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 67,097 | $1M | 0.1% | 2026-Q1 |
| Circumference Group LLC trimmed | 178,543 | $984K | 0.1% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 176,666 | $973K | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 9,273,763 | $141M | 17.5% | 2025-Q4 stale |
| Penserra Capital Management LLC added | 4,039,040 | $61M | 7.6% | 2025-Q4 stale |
| FIRST TRUST ADVISORS LP added | 2,326,056 | $35M | 4.4% | 2025-Q4 stale |
| HAWK RIDGE CAPITAL MANAGEMENT LP trimmed | 835,618 | $16M | 1.9% | 2025-Q3 stale |
| Estuary Capital Management LP added | 544,083 | $14M | 1.8% | 2025-Q1 stale |
| Invenomic Capital Management LP added | 627,983 | $10M | 1.2% | 2025-Q4 stale |
| Freshford Capital Management, LLC | 357,524 | $9M | 1.2% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP added | 485,399 | $7M | 0.9% | 2025-Q4 stale |
| Thematics Asset Management trimmed | 376,738 | $7M | 0.9% | 2025-Q3 stale |
| Cannae Holdings, Inc. | 350,000 | $7M | 0.8% | 2025-Q3 stale |
| SHAPIRO CAPITAL MANAGEMENT LLC trimmed | 367,967 | $6M | 0.7% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 357,315 | $5M | 0.7% | 2025-Q4 stale |
| Vident Advisory, LLC added | 207,639 | $5M | 0.6% | 2025-Q2 stale |
| MACQUARIE GROUP LTD trimmed | 209,866 | $4M | 0.5% | 2025-Q3 stale |
| 13D Management LLC trimmed | 124,365 | $3M | 0.4% | 2025-Q1 stale |
| Susquehanna Portfolio Strategies, LLC added | 170,646 | $3M | 0.4% | 2025-Q3 stale |
| STATE OF WISCONSIN INVESTMENT BOARD added | 133,674 | $3M | 0.4% | 2025-Q2 stale |
| EXCHANGE TRADED CONCEPTS, LLC added | 130,116 | $3M | 0.4% | 2025-Q2 stale |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 193,188 | $3M | 0.4% | 2025-Q4 stale |
| Hound Partners, LLC added | 154,920 | $3M | 0.4% | 2025-Q3 stale |
| Bridgewater Associates, LP added | 182,021 | $3M | 0.3% | 2025-Q4 stale |
| Parallax Volatility Advisers, L.P. added | 99,643 | $3M | 0.3% | 2025-Q1 stale |
| ALGERT GLOBAL LLC trimmed | 166,712 | $3M | 0.3% | 2025-Q4 stale |
| Cubist Systematic Strategies, LLC trimmed | 127,124 | $2M | 0.3% | 2025-Q3 stale |
| TUDOR INVESTMENT CORP ET AL | 118,539 | $2M | 0.3% | 2025-Q4 stale |
| NORGES BANK trimmed | 55,000 | $2M | 0.3% | 2025-Q3 stale |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC added | 79,184 | $2M | 0.3% | 2025-Q1 stale |
| Trexquant Investment LP trimmed | 108,043 | $2M | 0.3% | 2025-Q3 stale |
| TEACHER RETIREMENT SYSTEM OF TEXAS added | 126,276 | $2M | 0.2% | 2025-Q4 stale |
| 272 Capital LP trimmed | 65,000 | $2M | 0.2% | 2025-Q1 stale |
| RAYMOND JAMES FINANCIAL INC trimmed | 109,270 | $2M | 0.2% | 2025-Q4 stale |
| CANTOR FITZGERALD, L. P. added | 69,147 | $2M | 0.2% | 2025-Q2 stale |
| PICTON MAHONEY ASSET MANAGEMENT added | 81,903 | $2M | 0.2% | 2025-Q3 stale |
| NEEDHAM INVESTMENT MANAGEMENT LLC trimmed | 90,000 | $1M | 0.2% | 2025-Q4 stale |
| FRED ALGER MANAGEMENT, LLC trimmed | 50,517 | $1M | 0.1% | 2025-Q2 stale |
| VARCOV Co. new | 73,584 | $1M | 0.1% | 2025-Q4 stale |
| READYSTATE ASSET MANAGEMENT LP added | 70,148 | $1M | 0.1% | 2025-Q4 stale |
| DARK FOREST CAPITAL MANAGEMENT LP added | 55,138 | $1M | 0.1% | 2025-Q3 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.