<SEC-DOCUMENT>0001258897-18-001231-index.html : 20180209 <SEC-HEADER>0001258897-18-001231.hdr.sgml : 20180209 <ACCEPTANCE-DATETIME>20180209085514 ACCESSION NUMBER: 0001258897-18-001231 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20180209 DATE AS OF CHANGE: 20180209 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: 18588236 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: DIMENSIONAL FUND ADVISORS LP CENTRAL INDEX KEY: 0000354204 STANDARD INDUSTRIAL CLASSIFICATION: UNKNOWN SIC - 0000 [0000] IRS NUMBER: 222370029 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 6300 BEE CAVE ROAD STREET 2: BUILDING ONE CITY: AUSTIN STATE: TX ZIP: 78746 BUSINESS PHONE: (512) 306-7400 MAIL ADDRESS: STREET 1: 6300 BEE CAVE ROAD STREET 2: BUILDING ONE CITY: AUSTIN STATE: TX ZIP: 78746 FORMER COMPANY: FORMER CONFORMED NAME: DIMENSIONAL FUND ADVISORS INC DATE OF NAME CHANGE: 19920929 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G/A <SEQUENCE>1 <FILENAME>dfs375.htm <DESCRIPTION>SCHEDULE 13G/A <TEXT> Document 1 - file: dfs375.htm
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