Clean Harbors Inc: which funds bought and sold

Institutions that bought and sold Clean Harbors 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, 290 institutions that filed 13F reports for both quarters added to or opened positions in Clean Harbors, and 302 cut or closed them. Together they added a net 247K shares, +0.5% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 218K shares (−1.2%); index fund managers were net buyers of 545K shares (+4.3%). 85 opened a new position and 53 sold out entirely.

Bought, Q2 2026 290 institutions, 85 of them new holders Sold, Q2 2026 302 institutions, 53 of them sold out

Net change, all compared +247K shares (+0.5%)

Net change, active managers −218K shares (−1.2%), 46 bought, 28 sold

Buyers versus sellers

institutions compared, 697

290 bought 105 302 sold

Active managers and hedge funds 46 bought · 28 sold · −218K

Index fund managers 8 bought · 4 sold · +545K

Other institutions 236 bought · 270 sold · −80K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+901K +42.9%	3.0M	$897M
Hood River Capital Management LLC	+374K +301.3%	499K	$149M
Fil Ltd Active manager	+368K +72.2%	877K	$262M
Steadfast Capital Management LP Hedge fund	+302K New position	302K	$90.2M
AQR Capital Management LLC Hedge fund	+297K +164.6%	478K	$143M
Citadel Advisors LLC Hedge fund	+280K +802.7%	314K	$93.9M
Blackrock, Inc. Index funds	+274K +5.7%	5.1M	$1.5B
Qube Research & Technologies Ltd Hedge fund	+247K New position	247K	$73.8M
First Trust Advisors LP	+215K +27.6%	993K	$297M
Holocene Advisors, LP Hedge fund	+211K New position	211K	$63.1M
Geode Capital Management, LLC Index funds	+183K +19.4%	1.1M	$337M
Bank Of America Corp	+166K +53.2%	478K	$143M
Jane Street Group, LLC	+126K +94.8%	259K	$77.3M
Munro Partners Active manager	+109K +268.3%	150K	$44.7M
Assenagon Asset Management S.A.	+96K +196.3%	145K	$43.3M
HRT Financial LP	+91K New position	91K	$27.1M
Renaissance Technologies LLC Hedge fund	+82K New position	82K	$24.6M
Thrivent Financial For Lutherans	+77K +106.9%	149K	$44.6M
SG Capital Management LLC	+75K New position	75K	$22.5M
BNP Paribas Financial Markets	+71K +1182.0%	77K	$22.9M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+901K +42.9%	3.0M	$897M
Fil Ltd Active manager	+368K +72.2%	877K	$262M
Steadfast Capital Management LP Hedge fund	+302K New position	302K	$90.2M
AQR Capital Management LLC Hedge fund	+297K +164.6%	478K	$143M
Citadel Advisors LLC Hedge fund	+280K +802.7%	314K	$93.9M
Qube Research & Technologies Ltd Hedge fund	+247K New position	247K	$73.8M
Holocene Advisors, LP Hedge fund	+211K New position	211K	$63.1M
Munro Partners Active manager	+109K +268.3%	150K	$44.7M
Renaissance Technologies LLC Hedge fund	+82K New position	82K	$24.6M
Point72 Asset Management, L.P. Hedge fund	+49K +85.7%	105K	$31.4M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Lone Pine Capital LLC Hedge fund	−1.8M Sold out	0	—
Pictet Asset Management Holding SA	−633K −51.0%	609K	$182M
Wellington Management Group LLP Active manager	−422K −11.8%	3.2M	$943M
Select Equity Group, L.P. Active manager	−403K −35.6%	728K	$218M
Two Sigma Investments, LP Hedge fund	−301K −41.6%	423K	$126M
Bessemer Group Inc	−169K −18.1%	763K	$228M
Durable Capital Partners LP Hedge fund	−159K −15.1%	892K	$267M
UBS Group AG	−113K −49.9%	113K	$33.9M
Amundi	−99K −93.0%	7,436	$2.2M
Clearbridge Investments, LLC Active manager	−76K −6.3%	1.1M	$337M
Millennium Management LLC Hedge fund	−64K Sold out	0	—
Charter Oak Advisors LP	−63K Sold out	0	—
Impax Asset Management Group PLC	−61K −49.9%	62K	$18.4M
Swedbank AB	−57K −51.8%	53K	$15.8M
UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC	−51K −9.8%	467K	$139M
Davenport & Co LLC	−49K −14.4%	293K	$87.8M
Vaughan Nelson Investment Management, L.P. Active manager	−44K −11.4%	342K	$102M
Nordea Investment Management AB	−42K −7.4%	526K	$157M
Rockefeller Capital Management L.P.	−40K −95.1%	2,040	$609,450
Tidal Investments LLC	−39K −53.8%	33K	$9.9M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Lone Pine Capital LLC Hedge fund	−1.8M Sold out	0	—
Wellington Management Group LLP Active manager	−422K −11.8%	3.2M	$943M
Select Equity Group, L.P. Active manager	−403K −35.6%	728K	$218M
Two Sigma Investments, LP Hedge fund	−301K −41.6%	423K	$126M
Durable Capital Partners LP Hedge fund	−159K −15.1%	892K	$267M
Clearbridge Investments, LLC Active manager	−76K −6.3%	1.1M	$337M
Millennium Management LLC Hedge fund	−64K Sold out	0	—
Vaughan Nelson Investment Management, L.P. Active manager	−44K −11.4%	342K	$102M
Thornburg Investment Management Inc Active manager	−38K Sold out	0	—
T. Rowe Price Investment Management, Inc. Active manager	−36K −7.5%	441K	$132M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Steadfast Capital Management LPHedge fund	302K	$90.2M
Qube Research & Technologies LtdHedge fund	247K	$73.8M
Holocene Advisors, LPHedge fund	211K	$63.1M
HRT Financial LP	91K	$27.1M
Renaissance Technologies LLCHedge fund	82K	$24.6M
SG Capital Management LLC	75K	$22.5M
Squarepoint Ops LLCHedge fund	46K	$13.8M
4D Advisors, LLC	35K	$10.5M
Kr Capital LP	35K	$10.4M
Arrowstreet Capital, Limited PartnershipHedge fund	33K	$9.9M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Lone Pine Capital LLCHedge fund	1.8M	$503M
Millennium Management LLCHedge fund	64K	$18.3M
Charter Oak Advisors LP	63K	$18.1M
Thornburg Investment Management IncActive manager	38K	$10.8M
Sycomore Asset Management	31K	$7.6M
One Madison Group LLC	24K	$6.9M
Atika Capital Management LLC	22K	$6.3M
Heights Point Management, LP	8,340	$2.4M
Susquehanna Portfolio Strategies, LLC	8,018	$2.3M
Ecofi Investissements SA	7,450	$2.1M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 657
Ten largest holders: 44.8%
Index fund managers: 27.0%
Active managers and hedge funds: 35.5%

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	46	28	20	5	−218K	−1.2%
Index fund managers	8	4	0	0	+545K	+4.3%
Other institutions	236	270	65	48	−80K	−0.5%

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 Clean Harbors.

Only managers that filed a holdings report for both quarters are compared (697 here). 24 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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