<SEC-DOCUMENT>0001193125-22-212651-index.html : 20220804
<SEC-HEADER>0001193125-22-212651.hdr.sgml : 20220804
<ACCEPTANCE-DATETIME>20220804170836
ACCESSION NUMBER:		0001193125-22-212651
CONFORMED SUBMISSION TYPE:	424B7
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20220804
DATE AS OF CHANGE:		20220804

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Ecovyst Inc.
		CENTRAL INDEX KEY:			0001708035
		STANDARD INDUSTRIAL CLASSIFICATION:	CHEMICALS & ALLIED PRODUCTS [2800]
		IRS NUMBER:				813406833
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B7
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-255514
		FILM NUMBER:		221137657

	BUSINESS ADDRESS:	
		STREET 1:		300 LINDENWOOD DRIVE
		CITY:			MALVERN
		STATE:			PA
		ZIP:			19355
		BUSINESS PHONE:		484-617-1200

	MAIL ADDRESS:	
		STREET 1:		300 LINDENWOOD DRIVE
		CITY:			MALVERN
		STATE:			PA
		ZIP:			19355

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PQ Group Holdings Inc.
		DATE OF NAME CHANGE:	20170531
</SEC-HEADER>
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<TYPE>424B7
<SEQUENCE>1
<FILENAME>d166730d424b7.htm
<DESCRIPTION>424B7
<TEXT>
Document 1 - file: d166730d424b7.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-FILING FEES
<SEQUENCE>2
<FILENAME>d166730dexfilingfees.htm
<DESCRIPTION>EX-FILING FEES
<TEXT>
Document 2 - file: d166730dexfilingfees.htm

</DOCUMENT>
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<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g166730g01v00.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g166730g01v00.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g166730g11a64.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g166730g11a64.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g166730g16a16.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g166730g16a16.jpg

</DOCUMENT>
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