<SEC-DOCUMENT>0001172661-20-000878-index.html : 20200214
<SEC-HEADER>0001172661-20-000878.hdr.sgml : 20200214
<ACCEPTANCE-DATETIME>20200214164032
ACCESSION NUMBER:		0001172661-20-000878
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20200214
DATE AS OF CHANGE:		20200214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CLEAN HARBORS INC
		CENTRAL INDEX KEY:			0000822818
		STANDARD INDUSTRIAL CLASSIFICATION:	HAZARDOUS WASTE MANAGEMENT [4955]
		IRS NUMBER:				042997780
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-39179
		FILM NUMBER:		20621127

	BUSINESS ADDRESS:	
		STREET 1:		42 LONGWATER DRIVE
		STREET 2:		P.O. BOX 9149
		CITY:			NORWELL
		STATE:			MA
		ZIP:			02061-9149
		BUSINESS PHONE:		781-792-5000

	MAIL ADDRESS:	
		STREET 1:		42 LONGWATER DRIVE
		CITY:			NORWELL
		STATE:			MA
		ZIP:			02061-9149

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ArrowMark Colorado Holdings LLC
		CENTRAL INDEX KEY:			0001483859
		IRS NUMBER:				392068140
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		100 FILLMORE STREET, SUITE 325
		CITY:			DENVER
		STATE:			CO
		ZIP:			80206
		BUSINESS PHONE:		303.398.2929

	MAIL ADDRESS:	
		STREET 1:		100 FILLMORE STREET, SUITE 325
		CITY:			DENVER
		STATE:			CO
		ZIP:			80206

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Arrowpoint Asset Management, LLC
		DATE OF NAME CHANGE:	20100211
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>arrowmark-clh123119a1.htm
<DESCRIPTION>SCHEDULE 13G HOLDINGS REPORT AMENDMENT
<TEXT>
Document 1 - file: arrowmark-clh123119a1.htm

</DOCUMENT>
</SEC-DOCUMENT>