Rapid7, Inc.: which funds bought and sold

Institutions that bought and sold Rapid7 shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 155 institutions that filed 13F reports for both quarters added to or opened positions in Rapid7, and 109 cut or closed them. Together they added a net 7.9M shares, +12.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 3.9M shares (+17.6%); index fund managers were net buyers of 2.1M shares (+10.7%). 49 opened a new position and 55 sold out entirely.

Bought, Q2 2026 155 institutions, 49 of them new holders Sold, Q2 2026 109 institutions, 55 of them sold out

Net change, all compared +7.9M shares (+12.9%)

Net change, active managers +3.9M shares (+17.6%), 28 bought, 18 sold

Buyers versus sellers

institutions compared, 288

155 bought 24 109 sold

Active managers and hedge funds 28 bought · 18 sold · +3.9M

Index fund managers 7 bought · 3 sold · +2.1M

Other institutions 120 bought · 88 sold · +2.0M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+2.4M +36.9%	9.0M	$73M
D. E. Shaw & Co., Inc. Hedge fund	+1.3M +588.9%	1.5M	$12.1M
AQR Capital Management LLC Hedge fund	+1.2M +160.9%	1.9M	$15.5M
Arrowstreet Capital, Limited Partnership Hedge fund	+1.0M New position	1.0M	$8.3M
UBS Group AG	+986K +32.1%	4.1M	$32.9M
Citadel Advisors LLC Hedge fund	+899K +152.0%	1.5M	$12.1M
Goldman Sachs Group Inc	+898K +113.8%	1.7M	$13.7M
Acadian Asset Management LLC Active manager	+604K +34.2%	2.4M	$19.2M
Jacobs Levy Equity Management, Inc Active manager	+498K +72.0%	1.2M	$9.6M
Two Sigma Investments, LP Hedge fund	+484K +21.7%	2.7M	$22M
Creative Planning	+452K +190.6%	688K	$5.6M
State Street Corp Index funds	+406K +19.2%	2.5M	$20.4M
Bank Of America Corp	+312K +58.4%	847K	$6.9M
Renaissance Technologies LLC Hedge fund	+278K +186.3%	427K	$3.5M
Morgan Stanley	+268K +31.6%	1.1M	$9M
Iq Eq Fund Management (Ireland) Ltd	+254K +79.0%	576K	$4.7M
Assenagon Asset Management S.A.	+251K +327.4%	328K	$2.7M
Jump Financial, LLC	+251K New position	251K	$2M
Russell Investments Group, Ltd.	+220K +181.1%	341K	$2.7M
Franklin Resources Inc Active manager	+218K +123.3%	394K	$3.2M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
D. E. Shaw & Co., Inc. Hedge fund	+1.3M +588.9%	1.5M	$12.1M
AQR Capital Management LLC Hedge fund	+1.2M +160.9%	1.9M	$15.5M
Arrowstreet Capital, Limited Partnership Hedge fund	+1.0M New position	1.0M	$8.3M
Citadel Advisors LLC Hedge fund	+899K +152.0%	1.5M	$12.1M
Acadian Asset Management LLC Active manager	+604K +34.2%	2.4M	$19.2M
Jacobs Levy Equity Management, Inc Active manager	+498K +72.0%	1.2M	$9.6M
Two Sigma Investments, LP Hedge fund	+484K +21.7%	2.7M	$22M
Renaissance Technologies LLC Hedge fund	+278K +186.3%	427K	$3.5M
Franklin Resources Inc Active manager	+218K +123.3%	394K	$3.2M
Capital Fund Management S.A. Hedge fund	+170K New position	170K	$1.4M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Vanguard Portfolio Management LLC Index funds	−1.1M −22.2%	4.0M	$32.6M
Alyeska Investment Group, L.P. Hedge fund	−1.1M Sold out	0	—
Marshall Wace, LLP Hedge fund	−924K Sold out	0	—
SG Americas Securities, LLC	−775K −94.8%	42K	$342,000
UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC	−635K −98.9%	6,901	$55,898
Jane Street Group, LLC	−606K −68.0%	285K	$2.3M
Millennium Management LLC Hedge fund	−593K −63.2%	345K	$2.8M
Qube Research & Technologies Ltd Hedge fund	−432K −57.1%	324K	$2.6M
Occudo Quantitative Strategies LP	−270K Sold out	0	—
Atom Investors LP	−232K −60.8%	150K	$1.2M
Canada Life Assurance Co	−171K −15.8%	909K	$7.3M
Asset Management One Co., Ltd.	−126K Sold out	0	—
Soros Fund Management LLC Hedge fund	−125K Sold out	0	—
Swiss National Bank	−115K Sold out	0	—
Engineers Gate Manager LP Hedge fund	−114K −31.7%	245K	$2M
Dimensional Fund Advisors LP	−110K −48.2%	118K	$958,708
Squarepoint Ops LLC Hedge fund	−96K −40.2%	143K	$1.2M
Mirae Asset Global Etfs Holdings Ltd.	−92K −6.6%	1.3M	$10.6M
Schonfeld Strategic Advisors LLC Hedge fund	−88K Sold out	0	—
Y-Intercept (Hong Kong) Ltd	−79K −41.4%	111K	$902,615

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Alyeska Investment Group, L.P. Hedge fund	−1.1M Sold out	0	—
Marshall Wace, LLP Hedge fund	−924K Sold out	0	—
Millennium Management LLC Hedge fund	−593K −63.2%	345K	$2.8M
Qube Research & Technologies Ltd Hedge fund	−432K −57.1%	324K	$2.6M
Soros Fund Management LLC Hedge fund	−125K Sold out	0	—
Engineers Gate Manager LP Hedge fund	−114K −31.7%	245K	$2M
Squarepoint Ops LLC Hedge fund	−96K −40.2%	143K	$1.2M
Schonfeld Strategic Advisors LLC Hedge fund	−88K Sold out	0	—
Freestone Grove Partners LP Hedge fund	−58K Sold out	0	—
Boothbay Fund Management, LLC Hedge fund	−56K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Arrowstreet Capital, Limited PartnershipHedge fund	1.0M	$8.3M
Jump Financial, LLC	251K	$2M
Capital Fund Management S.A.Hedge fund	170K	$1.4M
Algert Global LLCHedge fund	165K	$1.3M
Rangeley Capital, LLC	143K	$1.2M
Balyasny Asset Management L.P.Hedge fund	139K	$1.1M
Soviero Asset Management, LP	130K	$1.1M
Ieq Capital, LLC	104K	$844,927
Ameriprise Financial Inc	98K	$789,978
Magnetar Financial LLCHedge fund	90K	$726,416

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Alyeska Investment Group, L.P.Hedge fund	1.1M	$6.2M
Marshall Wace, LLPHedge fund	924K	$5.1M
Occudo Quantitative Strategies LP	270K	$1.6M
Asset Management One Co., Ltd.	126K	$693,588
Soros Fund Management LLCHedge fund	125K	$688,750
Swiss National Bank	115K	$633,099
Schonfeld Strategic Advisors LLCHedge fund	88K	$483,187
Nordea Investment Management AB	71K	$386,883
Freestone Grove Partners LPHedge fund	58K	$321,900
Boothbay Fund Management, LLCHedge fund	56K	$310,086

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 236
Ten largest holders: 54.6%
Index fund managers: 31.2%
Active managers and hedge funds: 37.1%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	28	18	6	9	+3.9M	+17.6%
Index fund managers	7	3	0	0	+2.1M	+10.7%
Other institutions	120	88	43	46	+2.0M	+9.8%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Rapid7.

Only managers that filed a holdings report for both quarters are compared (288 here). 7 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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