<SUBMISSION>
<SECRELEASE-DATETIME> 20201105-174321 ⇐ Metadata from SEC Info (ET)
<SECWEBSITE-DATETIME> 20201105-164319 ⇐ Metadata from SEC Info (ET)
<ACCEPTANCE-DATETIME> 20201105-164234 ⇐ Filing accepted by SEC (ET)
<ACCESSION-NUMBER> 0001564590-20-051405
<TYPE> 8-K
<PUBLIC-DOCUMENT-COUNT> 13
<PERIOD> 20201105
<ITEMS> 2.02
<ITEMS> 9.01
<FILING-DATE> 20201105
<DATE-OF-FILING-DATE-CHANGE> 20201105
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<FILER>
<COMPANY-DATA>
<CONFORMED-NAME> Altair Engineering Inc.
<CIK> 0001701732
<ASSIGNED-SIC> 7372
<IRS-NUMBER> 382591828 ⇒ 38-2591828
<STATE-OF-INCORPORATION> DE
<FISCAL-YEAR-END> 1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE> 8-K
<ACT> 34
<FILE-NUMBER> 001-38263
<FILM-NUMBER> 201291185
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1> 1820 E. BIG BEAVER ROAD
<CITY> TROY
<STATE> MI
<ZIP> 48083
<PHONE> 248-614-2400
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1> 1820 E. BIG BEAVER ROAD
<CITY> TROY
<STATE> MI
<ZIP> 48083
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME> Altair Engineering Ing.
<DATE-CHANGED> 20170322
</FORMER-COMPANY>
</FILER>
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<DOCUMENT>
<TYPE> 8-K
<SEQUENCE> 1
<FILENAME> altr-8k_20201105.htm
<DESCRIPTION> 8-K
<TEXT>
<XBRL>
<?xml‚version="1.0" encoding="utf-8"?>
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<DOCUMENT>
<TYPE> EX-99.1
<SEQUENCE> 2
<FILENAME> altr-ex991_6.htm
<DESCRIPTION> EX-99.1
<TEXT>
<html>
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<DOCUMENT>
<TYPE> EX-101.SCH
<SEQUENCE> 3
<FILENAME> altr-20201105.xsd
<DESCRIPTION> XBRL TAXONOMY EXTENSION SCHEMA
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii"?>
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<DOCUMENT>
<TYPE> EX-101.LAB
<SEQUENCE> 4
<FILENAME> altr-20201105_lab.xml
<DESCRIPTION> XBRL TAXONOMY EXTENSION LABEL LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
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<DOCUMENT>
<TYPE> EX-101.PRE
<SEQUENCE> 5
<FILENAME> altr-20201105_pre.xml
<DESCRIPTION> XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
<TEXT>
<XBRL>
<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
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</TEXT>
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<DOCUMENT>
<TYPE> XML
<SEQUENCE> 6
<FILENAME> altr-8k_20201105_htm.xml
<DESCRIPTION> IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version="1.0" encoding="utf-8"?>
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<DOCUMENT>
<TYPE> XML
<SEQUENCE> 7
<FILENAME> R1.htm
<DESCRIPTION> IDEA: XBRL DOCUMENT
<TEXT>
<html>
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</DOCUMENT>
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<DOCUMENT>
<TYPE> EXCEL
<SEQUENCE> 8
<FILENAME> Financial_Report.xlsx
<DESCRIPTION> IDEA: XBRL DOCUMENT
<TEXT>
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</DOCUMENT>
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<DOCUMENT>
<TYPE> XML
<SEQUENCE> 9 ⇐ Not a Document/Exhibit
<FILENAME> Show.js
<DESCRIPTION> IDEA: XBRL DOCUMENT
<TEXT>
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</TEXT>
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<DOCUMENT>
<TYPE> XML
<SEQUENCE> 10 ⇐ Not a Document/Exhibit
<FILENAME> report.css
<DESCRIPTION> IDEA: XBRL DOCUMENT
<TEXT>
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</DOCUMENT>
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<DOCUMENT>
<TYPE> XML
<SEQUENCE> 11 ⇐ Document/Exhibit 9
<FILENAME> FilingSummary.xml
<DESCRIPTION> IDEA: XBRL DOCUMENT
<TEXT>
<XML>
<?xml version='1.0' encoding='utf-8'?>
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</TEXT>
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<DOCUMENT>
<TYPE> JSON
<SEQUENCE> 13 ⇒ 12 ⇐ Document/Exhibit 10
<FILENAME> MetaLinks.json
<DESCRIPTION> IDEA: XBRL DOCUMENT
<TEXT>
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</TEXT>
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<DOCUMENT>
<TYPE> ZIP
<SEQUENCE> 14 ⇒ 13 ⇐ Document/Exhibit 11
<FILENAME> 0001564590-20-051405-xbrl.zip
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</SUBMISSION> |
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