How many institutions held CLH - CLEAN HARBORS INC - Common Stock, par value $0.01 per share in Q1 2021?

286 institutional investors reported CLH - CLEAN HARBORS INC - Common Stock, par value $0.01 per share for Q1 2021. Use the holders table for investor-level position and value details.

CLEAN HARBORS INC - Common Stock, par value $0.01 per share (CLH)

Q: What does CUSIP 184496107 represent in this 13F holders report?

CUSIP 184496107 is the security identifier for CLH - CLEAN HARBORS INC - Common Stock, par value $0.01 per share used to aggregate holder disclosures.

CUSIP: 184496107

Q1 2021 13F Holders as of 31 Mar 2021

Security type / class: Equity / Common Stock, par value $0.01 per share
Total 13F shares: 48,456,862
Total 13F value: $4,073,879,610
Share change: -207,169
Put/Call ratio: 139%
SEC-reported price per share: $84.06
Number of holders: 286
Value change: -$14,134,004
Number of buys: 121
Number of sells: 140
Shares outstanding: 53,531,240

Security key

184496107

Report period

Q1 2021

Institutions

286

Top holders

CLH full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2021 Previous quarter: Q4 2020 CLEAN HARBORS INC SEC filings CLEAN HARBORS INC company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 184496107

Newer quarter: Q2 2021 Previous quarter: Q4 2020

Recent filing periods:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Ownership snapshot

Top reported holders of CLH - CLEAN HARBORS INC - Common Stock, par value $0.01 per share (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.

Comparable stake leader

WELLINGTON MANAGEMENT GRO...

Disclosed value leader

WELLINGTON MANAGEMENT GRO...

Comparable rows

15/15

Latest evidence

31 Dec 2020

13F Lead comparable stake: 13% Showing 1-6 of 15 holder rows.

Quick read

WELLINGTON MANAGEMENT GROUP LLP leads the comparable SEC ownership view at 13%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens WELLINGTON MANAGEMENT GROUP LLP's linked filing trail.

Comparable ownership Top 5

WELLINGTON MANAGEMENT GROUP LLP 13%

VANGUARD GROUP INC 8.4%

BlackRock Finance, Inc. 7.8%

ArrowMark Colorado Holdings LLC 4.4%

DIMENSIONAL FUND ADVISORS LP 3.4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	13%	$518,230,000 6,809,828 shares	—	31 Dec 2020
VANGUARD GROUP INC	13F Company 13F	8.4%	$341,736,000 4,490,624 shares	—	31 Dec 2020
BlackRock Finance, Inc.	13F Company 13F	7.8%	$318,613,000 4,186,752 shares	—	31 Dec 2020
ArrowMark Colorado Holdings LLC	13F Company 13F	4.4%	$177,976,000 2,338,706 shares	—	31 Dec 2020
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	3.4%	$140,523,000 1,846,594 shares	—	31 Dec 2020
Impax Asset Management Group plc	13F Company 13F	2.8%	$111,901,000 1,485,701 shares	—	31 Dec 2020

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.

13F holder rows

Institutional holders as of Q1 2021

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

286

48,456,862

Rows available

286

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2021 vs Q4 2020 Across Filers

Q4 2020 holders

266

Q1 2021 holders

286

Holder diff

Investor	Q4 2020 Shares	Q1 2021 Shares	Share Diff	Share Chg %	Q4 2020 value	Q1 2021 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend