<SEC-DOCUMENT>0001193125-21-366232-index.html : 20211223
<SEC-HEADER>0001193125-21-366232.hdr.sgml : 20211223
<ACCEPTANCE-DATETIME>20211223161559
ACCESSION NUMBER:		0001193125-21-366232
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20211223
DATE AS OF CHANGE:		20211223
GROUP MEMBERS:		BIA GP L.L.C.
GROUP MEMBERS:		BIA GP L.P.
GROUP MEMBERS:		BIP HOLDINGS MANAGER L.L.C.
GROUP MEMBERS:		BIP SECURITIES II-B L.P.
GROUP MEMBERS:		BLACKSTONE GROUP MANAGEMENT L.L.C.
GROUP MEMBERS:		BLACKSTONE HOLDINGS III GP L.P.
GROUP MEMBERS:		BLACKSTONE HOLDINGS III GP MANAGEMENT L.L.C.
GROUP MEMBERS:		BLACKSTONE INC.
GROUP MEMBERS:		BLACKSTONE INFRASTRUCTURE ASSOCIATES L.P.
GROUP MEMBERS:		STEPHEN A. SCHWARZMAN

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRSTENERGY CORP
		CENTRAL INDEX KEY:			0001031296
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]
		IRS NUMBER:				341843785
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-53029
		FILM NUMBER:		211517359

	BUSINESS ADDRESS:	
		STREET 1:		76 SOUTH MAIN ST
		CITY:			AKRON
		STATE:			OH
		ZIP:			44308-1890
		BUSINESS PHONE:		330-761-7837

	MAIL ADDRESS:	
		STREET 1:		76 SOUTH MAIN ST
		CITY:			AKRON
		STATE:			OH
		ZIP:			44308-1890

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Blackstone Holdings III L.P.
		CENTRAL INDEX KEY:			0001404073
		IRS NUMBER:				260288853
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D

	BUSINESS ADDRESS:	
		STREET 1:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154
		BUSINESS PHONE:		(212) 583-5000

	MAIL ADDRESS:	
		STREET 1:		345 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10154
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D
<SEQUENCE>1
<FILENAME>d436947dsc13d.htm
<DESCRIPTION>SC 13D
<TEXT>
Document 1 - file: d436947dsc13d.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d436947dex991.htm
<DESCRIPTION>EXHIBIT 1
<TEXT>
Document 2 - file: d436947dex991.htm

</DOCUMENT>
</SEC-DOCUMENT>