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Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000950170-24-018804
Filing Date
2024-02-22
Accepted
2024-02-22 16:21:28
Documents
115
Period of Report
2023-12-31

Document Format Files

Seq Description Document Type Size
1 10-K altr-20231231.htm   iXBRL 10-K 4239085
2 EX-21.1 altr-ex21_1.htm EX-21.1 28279
3 EX-23.1 altr-ex23_1.htm EX-23.1 9210
4 EX-31.1 altr-ex31_1.htm EX-31.1 11411
5 EX-31.2 altr-ex31_2.htm EX-31.2 11408
6 EX-32.1 altr-ex32_1.htm EX-32.1 9146
7 EX-97 altr-ex97.htm EX-97 47454
8 GRAPHIC img206701346_0.jpg GRAPHIC 51310
  Complete submission text file 0000950170-24-018804.txt   16888835

Data Files

Seq Description Document Type Size
9 XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT altr-20231231.xsd EX-101.SCH 2193795
117 EXTRACTED XBRL INSTANCE DOCUMENT altr-20231231_htm.xml XML 3278661
Mailing Address 1820 E. BIG BEAVER ROAD TROY MI 48083
Business Address 1820 E. BIG BEAVER ROAD TROY MI 48083 248-614-2400
Altair Engineering Inc. (Filer) CIK: 0001701732 (see all company filings)

IRS No.: 382591828 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-38263 | Film No.: 24665159
SIC: 7372 Services-Prepackaged Software
(CF Office: 06 Technology)