Form 10-K/A - Annual report [Section 13 and 15(d), not S-K Item 405]: [Amend]
SEC Accession No. 0001193125-25-062603
Filing Date
2025-03-25
Accepted
2025-03-25 16:35:41
Documents
19
Period of Report
2024-12-31

Document Format Files

Seq Description Document Type Size
1 10-K/A d150252d10ka.htm   iXBRL 10-K/A 731208
2 EX-31.3 d150252dex313.htm EX-31.3 2742
3 EX-31.4 d150252dex314.htm EX-31.4 2739
  Complete submission text file 0001193125-25-062603.txt   1135233

Data Files

Seq Description Document Type Size
4 XBRL TAXONOMY EXTENSION SCHEMA altr-20241231.xsd EX-101.SCH 5085
5 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE altr-20241231_cal.xml EX-101.CAL 657
6 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE altr-20241231_def.xml EX-101.DEF 17585
7 XBRL TAXONOMY EXTENSION LABEL LINKBASE altr-20241231_lab.xml EX-101.LAB 23318
8 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE altr-20241231_pre.xml EX-101.PRE 18716
21 EXTRACTED XBRL INSTANCE DOCUMENT d150252d10ka_htm.xml XML 12730
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)

EIN.: 382591828 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K/A | Act: 34 | File No.: 001-38263 | Film No.: 25768827
SIC: 7372 Services-Prepackaged Software
(CF Office: 06 Technology)