SEC ownership of CLEAN HARBORS INC

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000822818.

Top shareholders Insider holders Latest transactions

CIK: 0000822818
Symbol: CLH on NYSE
Location: Norwell, MA
Parsed ownership evidence: 13D/G, 13F, and 3/4/5
Lead holder: WELLINGTON MANAGEMENT GROUP LLP
13D/G signal: WELLINGTON MANAGEMENT GROUP LLP
Latest evidence date: 26 May 2026

Ownership snapshot

Top shareholders of CLEAN HARBORS INC (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Lead holder

WELLINGTON MANAGEMENT GRO...

13D/G signal

WELLINGTON MANAGEMENT GRO...

Evidence rows

Latest as of

26 May 2026

13D/G 13F 3/4/5 Lead comparable stake: 6.8% 13D/G row: WELLINGTON MANAGEMENT GROUP LLP Showing first 8 of 50 holder rows. Open remaining rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
WELLINGTON MANAGEMENT GROUP LLP	13D/G 13F Company 13D/G 13F	6.8%	$1,062,090,414 3,576,062 shares	-$477,123,372	31 Mar 2026
D1 Capital Partners L.P.	13D/G 13F Company 13D/G 13F	2.5%	$397,469,457 1,338,281 shares	-$428,749,497	31 Mar 2026
Alan S. Mckim	3/4/5 EXEC CHAIR, CTO., Director 3/4/5	4.2%	$636,119,921 2,265,223 shares	-$79,825,950	13 Mar 2026
Michael Louis Battles	3/4/5 CO-CEO, Director 3/4/5	0.18%	$26,786,577 95,387 shares	+$467,000	13 Mar 2026
Brian P. Weber	3/4/5 EVP (CHESI) 3/4/5	0.09%	$14,296,307 48,728 shares	-$2,063,406	13 Mar 2026
George L. Curtis	3/4/5 EXEC. VICE PRESIDENT (CHESI) 3/4/5	0.09%	$12,931,199 46,048 shares	—	13 Mar 2026
Eric W. Gerstenberg	3/4/5 CO-CEO 3/4/5	0.07%	$11,390,961 38,877 shares	-$2,956,388	18 Mar 2026
Edward G. Galante	3/4/5 Director 3/4/5	0.05%	$7,300,432 25,461 shares	—	20 May 2026

Show 42 additional holder rows in the full holder list

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Sharon M. Gabriel	3/4/5 EVP/CIO (CHESI) 3/4/5	0.04%	$5,915,473 21,065 shares	-$998,528	13 Mar 2026
Rebecca Underwood	3/4/5 PRESIDENT & EVP FACILITIES 3/4/5	0.03%	$5,246,840 18,684 shares	—	13 Mar 2026
Jeroen Diderich	3/4/5 EVP&President of Sales&Service 3/4/5	0.03%	$4,186,640 17,855 shares	—	01 Feb 2026
Robert Speights	3/4/5 PRESIDENT, INDUSTRIAL SERVICES 3/4/5	0.03%	$3,726,671 16,310 shares	—	27 May 2025
Eric J. Dugas	3/4/5 EVP CHIEF FINANCIAL OFFICER 3/4/5	0.03%	$3,925,582 13,979 shares	-$784,292	13 Mar 2026
Lauren States	3/4/5 Director 3/4/5	0.02%	$3,250,832 11,359 shares	-$225,804	26 May 2026
John R. Welch	3/4/5 Director 3/4/5	0.02%	$3,122,202 10,889 shares	-$204,803	20 May 2026
Charles H. Geer II	3/4/5 EVP, Industrial Services 3/4/5	0.02%	$3,043,807 10,839 shares	—	13 Mar 2026
Robert Willett	3/4/5 Director 3/4/5	0.02%	$2,875,328 10,028 shares	—	20 May 2026
Andrea Robertson	3/4/5 Director 3/4/5	0.02%	$2,800,778 9,768 shares	-$195,323	20 May 2026
John T. Preston	3/4/5 Director 3/4/5	0.01%	$2,019,726 7,044 shares	—	20 May 2026
Robert W. Harrison	3/4/5 EVP, EHS 3/4/5	0.01%	$1,866,891 6,648 shares	—	13 Mar 2026
Marcy L. Reed	3/4/5 Director 3/4/5	0.01%	$1,643,823 5,733 shares	-$240,718	20 May 2026
Shelley Stewart Jr.	3/4/5 Director 3/4/5	0.01%	$1,296,879 4,523 shares	—	20 May 2026
Karyn Polito	3/4/5 Director 3/4/5	0.01%	$1,183,334 4,127 shares	+$135,760	20 May 2026
Alison A. Quirk	3/4/5 Director 3/4/5	0.01%	$1,040,829 3,630 shares	-$199,755	20 May 2026
BlackRock, Inc.	13F Company 13F	9%	$1,377,018,670 4,802,492 shares	—	31 Mar 2026
JANUS HENDERSON GROUP PLC	13F Company 13F	4.4%	$675,367,739 2,355,394 shares	—	31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC	13F Company 13F	4.1%	$622,021,740 2,169,364 shares	—	31 Mar 2026
FMR LLC	13F Company 13F	3.9%	$602,471,093 2,101,179 shares	—	31 Mar 2026
VANGUARD PORTFOLIO MANAGEMENT LLC	13F Company 13F	3.7%	$562,836,940 1,962,951 shares	—	31 Mar 2026
LONE PINE CAPITAL LLC	13F Company 13F	3.3%	$503,196,814 1,754,950 shares	—	31 Mar 2026
STATE STREET CORP	13F Company 13F	2.9%	$440,789,169 1,537,297 shares	—	31 Mar 2026
Pictet Asset Management Holding SA	13F Company 13F	2.3%	$356,087,229 1,242,142 shares	—	31 Mar 2026
Clearbridge Investments, LLC	13F Company 13F	2.2%	$344,872,163 1,202,777 shares	—	31 Mar 2026
Select Equity Group, L.P.	13F Company 13F	2.1%	$324,464,241 1,131,602 shares	—	31 Mar 2026
Durable Capital Partners LP	13F Company 13F	2%	$301,345,488 1,050,973 shares	—	31 Mar 2026
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	1.8%	$271,278,985 945,892 shares	—	31 Mar 2026
BESSEMER GROUP INC	13F Company 13F	1.7%	$267,239,000 932,027 shares	—	31 Mar 2026
SNYDER CAPITAL MANAGEMENT L P	13F Company 13F	1.7%	$266,465,931 929,327 shares	—	31 Mar 2026
GOLDMAN SACHS GROUP INC	13F Company 13F	1.7%	$266,394,248 929,077 shares	—	31 Mar 2026
FIRST TRUST ADVISORS LP	13F Company 13F	1.5%	$223,202,387 778,441 shares	—	31 Mar 2026
TWO SIGMA INVESTMENTS, LP	13F Company 13F	1.4%	$207,600,548 724,028 shares	—	31 Mar 2026
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	1.1%	$174,515,664 608,709 shares	—	31 Mar 2026
NORDEA INVESTMENT MANAGEMENT AB	13F Company 13F	1.1%	$159,296,343 568,408 shares	—	31 Mar 2026
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F Company 13F	0.97%	$148,400,267 517,561 shares	—	31 Mar 2026
FIL Ltd	13F Company 13F	0.95%	$146,140,259 509,679 shares	—	31 Mar 2026
T. Rowe Price Investment Management, Inc.	13F Company 13F	0.89%	$136,853,000 477,287 shares	—	31 Mar 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F Company 13F	0.89%	$136,095,534 474,647 shares	—	31 Mar 2026
NORTHERN TRUST CORP	13F Company 13F	0.84%	$128,647,149 448,670 shares	—	31 Mar 2026
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	13F Company 13F	0.83%	$127,049,490 443,098 shares	—	31 Mar 2026
Invesco Ltd.	13F Company 13F	0.79%	$120,845,226 421,460 shares	—	31 Mar 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$87,092,208.

Buys

$602,760

Insiders: 2

Sells

$87,694,968

Insiders: 10

Net

-$87,092,208

Shares: -327,867

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 2,460 Shares: 330,327

Window (months)	Buy shares	Sell shares	Buy $	Sell $	Net $
0-3	460	107,308	$135,760	$31,398,467	-$31,262,707
3-6	0	110,179	$0	$30,946,053	-$30,946,053
6-9	0	0	$0	$0	$0
9-12	2,000	112,840	$467,000	$25,350,447	-$24,883,447

Reporting owners

Insider holders from Forms 3/4/5

Current reporting-owner rows connected to CLEAN HARBORS INC. Open the relationship link for the CIK-to-CIK filing trail.

Rows

Lead holder

Alan S. Mckim

Net 12M change

-$87,092,207

Latest report

26 May 2026

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Alan S. Mckim	EXEC CHAIR, CTO., Director	$636,119,921	-$79,825,950	-11%	Mixed	13 Mar 2026
Michael Louis Battles	CO-CEO, Director	$26,786,577	+$467,000	+1.8%	Mixed	13 Mar 2026
Brian P. Weber	Evp (Chesi)	$14,296,307	-$2,063,406	-13%	Filing P/S	13 Mar 2026
George L. Curtis	Exec. Vice President (Chesi)	$12,931,199			Mixed	13 Mar 2026
Eric W. Gerstenberg	Co Ceo	$11,390,961	-$2,956,388	-21%	Filing P/S	18 Mar 2026
Edward G. Galante	Director	$7,300,432			Median	20 May 2026
Sharon M. Gabriel	Evp/Cio (Chesi)	$5,915,473	-$998,528	-14%	Mixed	13 Mar 2026
Rebecca Underwood	President & Evp Facilities	$5,246,840			Mixed	13 Mar 2026
Michael J. Twohig	Evp (Chesi)	$5,147,223			Mixed	27 Mar 2023
Thomas J. Shields	Director	$5,130,278			Mixed	25 May 2022
Jeroen Diderich	EVP&President of Sales&Service	$4,186,640			Mixed	01 Feb 2026
Eric J. Dugas	Evp Chief Financial Officer	$3,925,582	-$784,292	-17%	Mixed	13 Mar 2026
Robert Speights	President, Industrial Services	$3,726,671			Filing P/S	27 May 2025
Lauren States	Director	$3,250,832	-$225,804	-6.5%	Filing P/S	26 May 2026
John R. Welch	Director	$3,122,202	-$204,803	-6.2%	Median	20 May 2026
Loan Nguyen Mansy	President Env Sales & Service	$3,061,364			Mixed	21 Aug 2023
Charles H. Geer II	EVP, Industrial Services	$3,043,807			Mixed	13 Mar 2026
Rod Marlin	Director	$2,930,084			Mixed	10 May 2021
Robert Willett	Director	$2,875,328			Median	20 May 2026
Andrea Robertson	Director	$2,800,778	-$195,323	-6.5%	Median	20 May 2026
John T. Preston	Director	$2,019,726			Median	20 May 2026
Robert W. Harrison	Evp, Ehs	$1,866,891			Mixed	13 Mar 2026
Melkeya McDuffie	Evp, Human Resources Officer	$1,800,467			Mixed	24 May 2023
Marcy L. Reed	Director	$1,643,823	-$240,718	-13%	Median	20 May 2026
Shelley Stewart Jr.	Director	$1,296,879			Median	20 May 2026
Karyn Polito	Director	$1,183,334	+$135,760	+13%	Median	20 May 2026
Alison A. Quirk	Director	$1,040,829	-$199,755	-16%	Median	20 May 2026
Eugene G. Banucci	Director	$998,515			Mixed	09 Jun 2023
Jeffrey H. Knapp	Evp Hr (Chesi)	$508,890			Mixed	23 Nov 2021

Recent Insider Transactions by Companies or Individuals for CLEAN HARBORS INC

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Reported value	Reported price	Shares	Shares owned	Date	Ownership
Lauren States	CLH	Common Stock	Sale	-6.49%	$225,804	$286.19	-789	11,359	26 May 2026	Direct
Robert Willett	CLH	Common Stock	Award	6.95%			652	10,028	20 May 2026	Direct
John R. Welch	CLH	Common Stock	Award	6.37%			652	10,889	20 May 2026	Direct
Shelley Stewart Jr.	CLH	Common Stock	Award	16.8%			652	4,523	20 May 2026	Direct
Lauren States	CLH	Common Stock	Award	5.67%			652	12,148	20 May 2026	Direct
Andrea Robertson	CLH	Common Stock	Award	7.15%			652	9,768	20 May 2026	Direct
Marcy L. Reed	CLH	Common Stock	Award	12.8%			652	5,733	20 May 2026	Direct
Alison A. Quirk	CLH	Common Stock	Award	21.9%			652	3,630	20 May 2026	Direct
John T. Preston	CLH	Common Stock	Award	10.2%			652	7,044	20 May 2026	Direct
Edward G. Galante	CLH	Common Stock	Award	2.63%			652	25,461	20 May 2026	Direct
Karyn Polito	CLH	Common Stock	Award	18.8%			652	4,127	20 May 2026	Direct
Karyn Polito	CLH	Common Stock	Purchase	15.3%	$135,760	$295.13	460	3,475	11 May 2026	Direct
Andrea Robertson	CLH	Common Stock	Gift	-3.62%			-342	9,116	11 May 2026	Direct
Eric W. Gerstenberg	CLH	Common Stock	Sale	-2.51%	$293,000	$293.00	-1,000	38,877	18 Mar 2026	Direct
Marcy L. Reed	CLH	Common Stock	Sale	-14.1%	$240,718	$287.94	-836	5,081	18 Mar 2026	Direct
Brian P. Weber	CLH	Common Stock	Sale	-8.77%	$1,373,945	$293.39	-4,683	48,728	17 Mar 2026	Direct
Brian P. Weber	CLH	Common Stock	Disposed to Issuer	-3.38%			-1,869	53,411	13 Mar 2026	Direct
Brian P. Weber	CLH	Common Stock	Tax liability	-1.71%			-960	55,280	13 Mar 2026	Direct
Rebecca Underwood	CLH	Common Stock	Disposed to Issuer	-6.98%			-1,401	18,684	13 Mar 2026	Direct
Rebecca Underwood	CLH	Common Stock	Tax liability	-0.62%			-125	20,085	13 Mar 2026	Direct
Sharon M. Gabriel	CLH	Common Stock	Disposed to Issuer	-6.24%			-1,401	21,065	13 Mar 2026	Direct
Sharon M. Gabriel	CLH	Common Stock	Tax liability	-3.13%			-727	22,466	13 Mar 2026	Direct
Eric W. Gerstenberg	CLH	Common Stock	Disposed to Issuer	-5.15%			-2,166	39,877	13 Mar 2026	Direct
Eric W. Gerstenberg	CLH	Common Stock	Tax liability	-2.27%			-977	42,043	13 Mar 2026	Direct
Robert W. Harrison	CLH	Common Stock	Disposed to Issuer	-5.25%			-368	6,648	13 Mar 2026	Direct
Robert W. Harrison	CLH	Common Stock	Tax liability	-0.26%			-18	7,016	13 Mar 2026	Direct
Charles H. Geer II	CLH	Common Stock	Disposed to Issuer	-1.27%			-139	10,839	13 Mar 2026	Direct
Eric J. Dugas	CLH	Common Stock	Disposed to Issuer	-8.65%			-1,324	13,979	13 Mar 2026	Direct
Eric J. Dugas	CLH	Common Stock	Tax liability	-3.95%			-630	15,303	13 Mar 2026	Direct
George L. Curtis	CLH	Common Stock	Disposed to Issuer	-2.18%			-1,028	46,048	13 Mar 2026	Direct
George L. Curtis	CLH	Common Stock	Tax liability	-0.74%			-350	47,065	13 Mar 2026	Direct
Alan S. Mckim	CLH	Common Stock	Tax liability	-3.72%			-1,265	32,762	13 Mar 2026	Direct
Michael Louis Battles	CLH	Common Stock	Disposed to Issuer	-2.22%			-2,166	95,387	13 Mar 2026	Direct
Michael Louis Battles	CLH	Common Stock	Tax liability	-1.16%			-1,148	97,538	13 Mar 2026	Direct
Alan S. Mckim	CLH	Common Stock	Sale	-4.62%	$29,265,000	$292.65	-100,000	2,065,368	04 Mar 2026	McKim 2007 Trust
Eric W. Gerstenberg	CLH	Common Stock	Sale	-5.49%	$699,650	$279.86	-2,500	43,020	23 Feb 2026	Direct
Sharon M. Gabriel	CLH	Common Stock	Sale	-13.2%	$998,528	$282.07	-3,540	23,193	20 Feb 2026	Direct
Eric J. Dugas	CLH	Common Stock	Sale	-14.9%	$784,292	$281.31	-2,788	15,933	20 Feb 2026	Direct
Alan S. Mckim	CLH	Common Stock	Gift	-0.44%			-10,000	2,265,368	19 Feb 2026	McKim 2007 Trust
Alan S. Mckim	CLH	Common Stock	Sale	-4.21%	$28,114,000	$281.14	-100,000	2,275,368	19 Feb 2026	McKim 2007 Trust
John R. Welch	CLH	Common Stock	Sale	-6.83%	$204,802	$273.07	-750	10,237	19 Feb 2026	Direct
Charles H. Geer II	CLH	Common Stock	Tax liability	-2.24%			-197	8,617	02 Feb 2026	Direct
Jeroen Diderich	CLH	Common Stock	Tax liability	-0.76%			-105	13,667	02 Feb 2026	Direct
Rebecca Underwood	CLH	Common Stock	Tax liability	-2.46%			-425	16,859	02 Feb 2026	Direct
Robert W. Harrison	CLH	Common Stock	Tax liability	-3.18%			-184	5,601	02 Feb 2026	Direct
Sharon M. Gabriel	CLH	Common Stock	Tax liability	-1.86%			-508	26,733	02 Feb 2026	Direct
Eric J. Dugas	CLH	Common Stock	Tax liability	-2.94%			-567	18,721	02 Feb 2026	Direct
Michael Louis Battles	CLH	Common Stock	Tax liability	-6.28%			-5,205	77,706	02 Feb 2026	Direct
Brian P. Weber	CLH	Common Stock	Tax liability	-2.61%			-1,394	52,018	02 Feb 2026	Direct
George L. Curtis	CLH	Common Stock	Tax liability	-0.52%			-249	47,415	02 Feb 2026	Direct

An asterisk next to the price means the reported price is likely invalid.