<SEC-DOCUMENT>0000899243-23-007345-index.html : 20230307
<SEC-HEADER>0000899243-23-007345.hdr.sgml : 20230307
<ACCEPTANCE-DATETIME>20230307161512
ACCESSION NUMBER:		0000899243-23-007345
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20230307
FILED AS OF DATE:		20230307
DATE AS OF CHANGE:		20230307

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital, LP
		CENTRAL INDEX KEY:			0001372939
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712772

	BUSINESS ADDRESS:	
		STREET 1:		245 PARK AVENUE
		STREET 2:		16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10167
		BUSINESS PHONE:		212 600-9600

	MAIL ADDRESS:	
		STREET 1:		245 PARK AVENUE
		STREET 2:		16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10167

	FORMER NAME:	
		FORMER CONFORMED NAME:	CCMP Capital, LLC
		DATE OF NAME CHANGE:	20060816

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital Investors III, L.P.
		CENTRAL INDEX KEY:			0001569775
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712770

	BUSINESS ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LLC
		STREET 2:		245 PARK AVENUE, 16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10167
		BUSINESS PHONE:		(212) 600-9657

	MAIL ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LLC
		STREET 2:		245 PARK AVENUE, 16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10167

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital Investors III (Employee), L.P.
		CENTRAL INDEX KEY:			0001581003
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712767

	BUSINESS ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LLC
		STREET 2:		245 PARK AVENUE, 16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10167
		BUSINESS PHONE:		(212) 600-9600

	MAIL ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LLC
		STREET 2:		245 PARK AVENUE, 16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10167

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital GP, LLC
		CENTRAL INDEX KEY:			0001674350
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712771

	BUSINESS ADDRESS:	
		STREET 1:		1 ROCKEFELLER PLAZA, 16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020
		BUSINESS PHONE:		212-600-9600

	MAIL ADDRESS:	
		STREET 1:		1 ROCKEFELLER PLAZA, 16TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital Associates III GP, LLC
		CENTRAL INDEX KEY:			0001718029
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712769

	BUSINESS ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172
		BUSINESS PHONE:		2126009600

	MAIL ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital Associates III, L.P.
		CENTRAL INDEX KEY:			0001718034
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712768

	BUSINESS ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172
		BUSINESS PHONE:		2126009600

	MAIL ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital Investors III (AV-9), L.P.
		CENTRAL INDEX KEY:			0001718030
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712764

	BUSINESS ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172
		BUSINESS PHONE:		2126009600

	MAIL ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital Investors III (AV-7), L.P.
		CENTRAL INDEX KEY:			0001718031
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712766

	BUSINESS ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172
		BUSINESS PHONE:		2126009600

	MAIL ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital Investors III (AV-10), L.P.
		CENTRAL INDEX KEY:			0001718032
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712763

	BUSINESS ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172
		BUSINESS PHONE:		2126009600

	MAIL ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CCMP Capital Investors III (AV-8), L.P.
		CENTRAL INDEX KEY:			0001718033
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38221
		FILM NUMBER:		23712765

	BUSINESS ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172
		BUSINESS PHONE:		2126009600

	MAIL ADDRESS:	
		STREET 1:		C/O CCMP CAPITAL ADVISORS, LP
		STREET 2:		277 PARK AVENUE, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10172

ISSUER:		

	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

	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>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
Document 1 - file: doc4.html

Document 1 - RAW XML: doc4.xml

</DOCUMENT>
</SEC-DOCUMENT>