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CLH Institutional Ownership & 13F Holders | SmartMoneyDB

CLHCLEAN HARBORS INC

COM · CUSIP 184496107

Smart Money Ownership

Of the 15 tracked institutions holding CLH, 9 have a 3-year clone track record — 7 of them beat the S&P. Average holder's clone alpha: +2.7pt. It's a gauge of who owns the name, not just how many.

$503.2M · 4.0% of book

CLH (CLEAN HARBORS INC) Institutional Ownership Summary

Among the 15 tracked institutional investors we monitor, CLH (CLEAN HARBORS INC) is held with a combined value of $5.87B across 21,308,443 shares. The largest holder is BlackRock, Inc. with a position worth $1.38B (0.02% of their portfolio). CITADEL ADVISORS LLC opened a new position in the most recent quarter. 9 funds increased their holdings. 5 funds reduced their position.

Total Institutional Value

$5.87B

Total Shares Held

21,308,443

Institutional Holders

% of Shares Outstanding

40.3%

of 52.85M shares · SEC 2026-05-01

Days to Cover

3.1-3.6%

1.15M shares short · FINRA 2026-07-15

Tracked 13F institutions hold 40.3% of CLH's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-05-01), not a live float.

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

FMR LLC+465% shares~$495.8M LONE PINE CAPITAL LLC+27% shares~$107.9M Durable Capital Partners LP+26% shares~$62.0M BlackRock, Inc.+4% shares~$58.0M AQR CAPITAL MANAGEMENT LLC+749% shares~$44.6M

13F Institutional Holders

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WELLINGTON MANAGEMENT GROUP LLP

LONE PINE CAPITAL LLC

D1 Capital Partners L.P.

3.42% of book-51.9%

$383.73M

Durable Capital Partners LP

3.10% of book+25.9%

$301.35M

AQR CAPITAL MANAGEMENT LLC

0.02% of book+748.8%

$50.59M

Grantham, Mayo, Van Otterloo & Co. LLC

0.10% of book+24.6%

$38.88M

#	Fund	Value↓	Shares	Portfolio %	Change
1	BlackRock, Inc.	$1.38B	4,802,492	0.02%	+4.4%
2	VANGUARD GROUP INC	$1.05B	4,489,676	0.02%	-1.4%
3	WELLINGTON MANAGEMENT GROUP LLP	$1.03B	3,577,034	0.19%	-31.0%
4	FMR LLC	$602.47M	2,101,179	0.03%	+464.6%
5	LONE PINE CAPITAL LLC	$503.20M	1,754,950	4.01%	+27.3%
6	STATE STREET CORP	$440.79M	1,537,297	0.02%	+2.3%
7	D1 Capital Partners L.P.	$383.73M	1,338,281	3.42%	-51.9%
8	Durable Capital Partners LP	$301.35M	1,050,973	3.10%	+25.9%
9	AQR CAPITAL MANAGEMENT LLC	$50.59M	180,668	0.02%	+748.8%
10	Grantham, Mayo, Van Otterloo & Co. LLC	$38.88M	135,593	0.10%	+24.6%

Congress Trading

2 members · 9 disclosed trades in CLH

Member	Type	Amount	Date
April McClain Delaney	Sell	$1,001 - $15,000	May 1, 2026
April McClain Delaney	Sell	$1,001 - $15,000	Apr 30, 2026
April McClain Delaney	Buy	$15,001 - $50,000	Feb 23, 2026
April McClain Delaney	Buy	$1,001 - $15,000

Frequently Asked Questions

Which institutional investors own the most CLH stock?

As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of CLH with a position worth $1.38B, representing 0.02% of their portfolio. In total, 15 institutional investors hold CLH with a combined value of $5.87B.

Are hedge funds buying or selling CLH?

In the most recent quarter, 1 fund opened a new position in CLH. Additionally, 9 increased their holdings and 5 reduced their positions.

What percentage of CLH is owned by institutional investors?

Institutional investors hold $5.87B worth of CLH stock across 15 positions. The largest institutional holder is BlackRock, Inc. with $1.38B in holdings.

What is a 13F filing and why does it matter for CLH?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For CLH, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track CLH institutional moves

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