<SEC-DOCUMENT>0001104659-21-013436-index.html : 20210208
<SEC-HEADER>0001104659-21-013436.hdr.sgml : 20210208
<ACCEPTANCE-DATETIME>20210208103752
ACCESSION NUMBER:		0001104659-21-013436
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210208
DATE AS OF CHANGE:		20210208

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Perma-Pipe International Holdings, Inc.
		CENTRAL INDEX KEY:			0000914122
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL & COMMERCIAL FANS & BLOWERS & AIR PURIFYING EQUIP [3564]
		IRS NUMBER:				363922969
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0131

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-43197
		FILM NUMBER:		21599931

	BUSINESS ADDRESS:	
		STREET 1:		6410 WEST HOWARD STREET
		CITY:			NILES
		STATE:			IL
		ZIP:			60714
		BUSINESS PHONE:		8479661000

	MAIL ADDRESS:	
		STREET 1:		6410 WEST HOWARD STREET
		CITY:			NILES
		STATE:			IL
		ZIP:			60714

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MFRI INC
		DATE OF NAME CHANGE:	19970402

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MIDWESCO FILTER RESOURCES INC
		DATE OF NAME CHANGE:	19970402

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VANGUARD INDEX FUNDS
		CENTRAL INDEX KEY:			0000036405
		IRS NUMBER:				231999755
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 2600
		STREET 2:		V26
		CITY:			VALLEY FORGE
		STATE:			PA
		ZIP:			19482
		BUSINESS PHONE:		6106691000

	MAIL ADDRESS:	
		STREET 1:		PO BOX 2600
		STREET 2:		V26
		CITY:			VALLEY FORGE
		STATE:			PA
		ZIP:			19482

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	VANGUARD INDEX FUNDS/
		DATE OF NAME CHANGE:	20011121

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	VANGUARD INDEX TRUST
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST INDEX INVESTMENT TRUST
		DATE OF NAME CHANGE:	19800904
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>tv0005-permapipeinternationa.htm
<DESCRIPTION>SCHEDULE 13G/A
<TEXT>
Document 1 - file: tv0005-permapipeinternationa.htm

</DOCUMENT>
</SEC-DOCUMENT>